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Comparing root-tail/root-tail.c (file contents):
Revision 1.38 by pcg, Wed Mar 31 01:50:24 2004 UTC vs.
Revision 1.65 by root, Sun Jun 16 01:24:29 2019 UTC

1	/*	1	/*
2	* Copyright 2001 by Marco d'Itri <md@linux.it>	2	* Copyright 2001 by Marco d'Itri <md@linux.it>
3	* Copyright 2000,2001,2002,2003,2004	3	* Copyright 2000,2001,2002,2003,2004
4	* Marc Lehmann <pcg@goof.com>,	4	* Marc Lehmann <pcg@goof.com>,
		5	* Chris Moore <chris.moore@mail.com>,
5	* and many others, see README	6	* and many others, see README
6	*	7	*
7	* Original version by Mike Baker.	8	* Original version by Mike Baker.
8	*	9	*
9	* This program is free software; you can redistribute it and/or modify	10	* This program is free software; you can redistribute it and/or modify
10	* it under the terms of the GNU General Public License as published by	11	* it under the terms of the GNU General Public License as published by
11	* the Free Software Foundation; either version 2 of the License, or	12	* the Free Software Foundation; either version 2 of the License, or
…		…
20	* along with this program; if not, write to the Free Software	21	* along with this program; if not, write to the Free Software
21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.	22	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
22	*/	23	*/
23		24
24	#include "config.h"	25	#include "config.h"
		26	#include <assert.h>
25	#include <stdlib.h>	27	#include <stdlib.h>
26	#include <stdio.h>	28	#include <stdio.h>
27	#include <unistd.h>	29	#include <unistd.h>
28	#include <string.h>	30	#include <string.h>
29	#include <signal.h>	31	#include <signal.h>
…		…
37	#include <ctype.h>	39	#include <ctype.h>
38	#include <stdarg.h>	40	#include <stdarg.h>
39	#include <X11/Xlib.h>	41	#include <X11/Xlib.h>
40	#include <X11/Xatom.h>	42	#include <X11/Xatom.h>
41	#include <X11/Xutil.h>	43	#include <X11/Xutil.h>
		44	#include <X11/extensions/shape.h>
		45	#include <X11/extensions/Xfixes.h>
42		46
43	#if HAS_REGEX	47	#if HAS_REGEX
44	#include <regex.h>	48	#include <regex.h>
45	#endif	49	#endif
46		50
47	#define SHADE_X 2	51	#define SHADE_X 2
48	#define SHADE_Y 2	52	#define SHADE_Y 2
49		53
		54	/* some italic fonts still go over the margin - this margin of error cleans up the mess */
		55	#define MARGIN_OF_ERROR 2
		56
50	/* data structures */	57	/* data structures */
51	struct logfile_entry	58	struct logfile_entry
52	{	59	{
53	struct logfile_entry *next;	60	struct logfile_entry *next;
54		61
55	char *fname; /* name of file */	62	char *fname; /* name of file */
56	char *desc; /* alternative description */	63	char *desc; /* alternative description */
57	char *buf; /* text read but not yet displayed */	64	char *buf; /* text read but not yet displayed */
		65	const char *fontname;
		66	XFontSet fontset;
		67	int font_height;
		68	int font_ascent;
58	FILE *fp; /* FILE struct associated with file */	69	FILE *fp; /* FILE struct associated with file */
59	ino_t inode; /* inode of the file opened */	70	ino_t inode; /* inode of the file opened */
60	off_t last_size; /* file size at the last check */	71	off_t last_size; /* file size at the last check */
61	unsigned long color; /* color to be used for printing */	72	unsigned long color; /* color to be used for printing */
		73	const char *colorname; /* color name/string */
62	int partial; /* true if the last line isn't complete */	74	int partial; /* true if the last line isn't complete */
63	int lastpartial; /* true if the previous output wasn't complete */	75	int lastpartial; /* true if the previous output wasn't complete */
64	int index; /* index into linematrix of a partial line */	76	struct line_node *last; /* last line we output */
65	int modified; /* true if line is modified & needs displaying */	77	int modified; /* true if line is modified & needs displaying */
66	};	78	};
67		79
		80	struct line_node
		81	{
		82	struct line_node *next;
		83	struct line_node *prev;
		84	struct logfile_entry *logfile;
		85
		86	char *line; /* the text of the line (so far) */
		87	int len; /* the length of the line (in bytes) so far */
		88	int wrapped_left; /* true if wrapped from the previous line */
		89	int wrapped_right; /* true if wrapped to the next line */
		90	struct breakinfo *breaks; /* array of indicies to spaces if wrapped_right */
		91	int num_words; /* the number of words in the line */
		92	int free_pixels; /* the number of free pixels to spread out */
		93	};
		94
		95	struct breakinfo
		96	{
		97	int index; /* index into string of start of substring */
		98	int width; /* width in pixels of start of substring */
		99	int len; /* length of substring */
		100	};
		101
68	struct linematrix	102	struct displaymatrix
69	{	103	{
70	char *line;	104	char *line;
71	int len;	105	int len;
		106	int offset;
		107	int buffer_size;
72	unsigned long color;	108	unsigned long color;
73	};	109	};
74		110
75	struct displaymatrix
76	{
77	char *line;
78	int len;
79	int buffer_size;
80	};
81
82	/* global variables */	111	/* global variables */
83	struct linematrix *lines;	112	static struct line_node *linelist = NULL, *linelist_tail = NULL;
84	struct displaymatrix *display;	113	static struct displaymatrix *display;
		114	static int continuation_width = -1;
		115	static int continuation_color;
		116	static int continuation_length;
		117
		118	/* HACK - ideally listlen will start at however many '~'s will fit on
		119	* the screen */
85	int width = STD_WIDTH, height = STD_HEIGHT, listlen;	120	static unsigned int width = STD_WIDTH, height = STD_HEIGHT;
		121	static int listlen = 50;
86	int win_x = LOC_X, win_y = LOC_Y;	122	static int win_x = LOC_X, win_y = LOC_Y;
87	int font_ascent, font_height;
88	int effect_x_space, effect_y_space; /* how much space does shading / outlining take up */	123	static int effect_x_space, effect_y_space; /* how much space does shading / outlining take up */
89	int effect_x_offset, effect_y_offset; /* and how does it offset the usable space */	124	static int effect_x_offset, effect_y_offset; /* and how does it offset the usable space */
90	int do_reopen;	125	static int do_reopen;
91	struct timeval interval = { 2, 400000 };	126	static struct timeval interval = { 2, 400000 };
92	XFontSet fontset;
93		127
94	/* command line options */	128	/* command line options */
95	int opt_noinitial, opt_shade, opt_frame, opt_reverse, opt_nofilename,	129	static int opt_noinitial, opt_shade, opt_frame, opt_reverse, opt_nofilename,
96	opt_outline, opt_noflicker, opt_whole, opt_update, opt_wordwrap,	130	opt_outline, opt_noflicker, opt_whole, opt_update, opt_wordwrap,
97	geom_mask, reload = 0;	131	opt_justify, geom_mask, opt_minspace, opt_windowed, reload;
98	const char *command = NULL,	132	static const char *command = NULL,
99	*fontname = USE_FONT, *dispname = NULL, *def_color = DEF_COLOR,	133	*fontname = USE_FONT, *dispname = NULL, *def_color = DEF_COLOR,
100	*continuation = "[+]";	134	*continuation = "|| ", *cont_color = DEF_CONT_COLOR;
101		135
102	struct logfile_entry *loglist = NULL, *loglist_tail = NULL;	136	struct logfile_entry *loglist = NULL, *loglist_tail = NULL;
103		137
104	Display *disp;	138	static Display *disp;
105	Window root;	139	static Window root;
106	GC WinGC;	140	static GC WinGC;
107		141
108	#if HAS_REGEX	142	#if HAS_REGEX
109	struct re_list	143	struct re_list
110	{	144	{
111	regex_t from;	145	regex_t from;
112	const char *to;	146	const char *to;
113	struct re_list *next;	147	struct re_list *next;
114	};	148	};
115	struct re_list *re_head, *re_tail;	149	static struct re_list *re_head, *re_tail;
116	char *transform_to = NULL;	150	static char *transform_to = NULL;
117	regex_t *transformre;	151	static regex_t *transformre;
118	#endif	152	#endif
119		153
120		154
121	/* prototypes */	155	/* prototypes */
122	void list_files (int);	156	static void list_files (int);
123	void force_reopen (int);	157	static void force_reopen (int);
124	void force_refresh (int);	158	static void force_refresh (int);
125	void blank_window (int);	159	static void blank_window (int);
		160	#ifdef USE_TOON_GET_ROOT_WINDOW
		161	static Window ToonGetRootWindow(Display *, int, Window *);
		162	#endif /* USE_TOON_GET_ROOT_WINDOW */
126		163
127	void InitWindow (void);	164	static void InitWindow (void);
128	unsigned long GetColor (const char *);	165	static unsigned long GetColor (const char *);
129	void redraw (int);	166	static void redraw (int);
130	void refresh (int, int, int, int);	167	static void refresh (int, int, int, int);
131		168
132	void transform_line (char *s);
133	int lineinput (struct logfile_entry *);	169	static int lineinput (struct logfile_entry *);
134	void reopen (void);	170	static void reopen (void);
135	void check_open_files (void);	171	static void check_open_files (void);
136	FILE *openlog (struct logfile_entry *);	172	static FILE *openlog (struct logfile_entry *);
137	static void main_loop (void);	173	static void main_loop (void);
138		174
139	void display_version (void);	175	static void display_version (void);
140	void display_help (char *);	176	static void display_help (char *);
141	void install_signal (int, void (*)(int));	177	static void install_signal (int, void (*)(int));
142	void *xstrdup (const char *);	178	static void *xstrdup (const char *);
143	void *xmalloc (size_t);	179	static void *xmalloc (size_t);
144	void *xrealloc (void *, size_t);	180	static void *xrealloc (void *, size_t);
145	int daemonize (void);	181	static int daemonize (void);
146		182
147	/* signal handlers */	183	/* signal handlers */
148	void	184	static void
149	list_files (int dummy)	185	list_files (int dummy)
150	{	186	{
151	struct logfile_entry *e;	187	struct logfile_entry *e;
152		188
153	fprintf (stderr, "Files opened:\n");	189	fprintf (stderr, "Files opened:\n");
154	for (e = loglist; e; e = e->next)	190	for (e = loglist; e; e = e->next)
155	fprintf (stderr, "\t%s (%s)\n", e->fname, e->desc);	191	fprintf (stderr, "\t%s (%s)\n", e->fname, e->desc);
156	}	192	}
157		193
158	void	194	static void
159	force_reopen (int dummy)	195	force_reopen (int dummy)
160	{	196	{
161	do_reopen = 1;	197	do_reopen = 1;
162	}	198	}
163		199
164	void	200	static void
165	force_refresh (int dummy)	201	force_refresh (int dummy)
166	{	202	{
167	redraw (1);	203	redraw (1);
168	}	204	}
169		205
170	void	206	static void
171	blank_window (int dummy)	207	blank_window (int dummy)
172	{	208	{
173	XClearArea (disp, root, win_x - 2, win_y - 2, width + 5, height + 5, False);	209	XClearArea (disp, root, win_x, win_y, width + MARGIN_OF_ERROR, height, False);
174	XFlush (disp);	210	XFlush (disp);
175	exit (0);	211	exit (0);
176	}	212	}
177		213
178	/* X related functions */	214	/* X related functions */
179	unsigned long	215	static unsigned long
180	GetColor (const char *ColorName)	216	GetColor (const char *ColorName)
181	{	217	{
182	XColor Color;	218	XColor Color;
183	XWindowAttributes Attributes;	219	XWindowAttributes Attributes;
184		220
…		…
191	fprintf (stderr, "can't allocate %s\n", ColorName);	227	fprintf (stderr, "can't allocate %s\n", ColorName);
192		228
193	return Color.pixel;	229	return Color.pixel;
194	}	230	}
195		231
		232	#ifndef USE_TOON_GET_ROOT_WINDOW
196	static Window	233	static void
197	root_window (Display * display, int screen_number)	234	find_root_window (Display *display, int screen_number)
198	{	235	{
		236	if (!root)
		237	{
199	Atom SWM_VROOT = XInternAtom (display, "__SWM_VROOT", False);	238	Atom SWM_VROOT = XInternAtom (display, "__SWM_VROOT", False);
200	Window real_root_window = RootWindow (display, screen_number);	239	Atom NAUTILUS_DESKTOP_WINDOW_ID = XInternAtom (display, "NAUTILUS_DESKTOP_WINDOW_ID", False);
201		240
202	if (root) /* root window set via option */
203	return root;
204
205	if (SWM_VROOT != None)
206	{
207	Window unused, *windows;	241	Window unused, *windows = 0;
208	unsigned int count;	242	unsigned int count;
209		243
		244	Atom type;
		245	int format;
		246	unsigned long nitems, bytes_after_return;
		247	unsigned char *virtual_root_window;
		248
		249	root = RootWindow (display, screen_number);
		250
		251	if (XGetWindowProperty (display, root, NAUTILUS_DESKTOP_WINDOW_ID,
		252	0, 1, False, XA_WINDOW, &type, &format,
		253	&nitems, &bytes_after_return,
		254	&virtual_root_window) == Success
		255	&& type == XA_WINDOW)
		256	{
210	if (XQueryTree (display, real_root_window, &unused, &unused, &windows,	257	if (XQueryTree (display, *(Window *)virtual_root_window, &unused, &unused, &windows, &count))
211	&count))	258	root = windows[count - 1];
		259
		260	XFree (virtual_root_window);
		261	}
		262	else if (XQueryTree (display, root, &unused, &unused, &windows, &count))
212	{	263	{
213	int i;	264	int i;
214		265
215	for (i = 0; i < count; i++)	266	for (i = 0; i < count; i++)
216	{	267	{
217	Atom type;
218	int format;
219	unsigned long nitems, bytes_after_return;
220	unsigned char *virtual_root_window;
221
222	if (XGetWindowProperty (display, windows[i], SWM_VROOT,	268	if (XGetWindowProperty (display, windows[i], SWM_VROOT,
223	0, 1, False, XA_WINDOW, &type, &format,	269	0, 1, False, XA_WINDOW, &type, &format,
224	&nitems, &bytes_after_return,	270	&nitems, &bytes_after_return,
225	&virtual_root_window) == Success)	271	&virtual_root_window) == Success
		272	&& type == XA_WINDOW)
226	{	273	{
227	if (type != None)
228	{
229	if (type == XA_WINDOW)
230	{
231	XFree (windows);
232	return (Window) virtual_root_window;	274	root = *(Window *)virtual_root_window;
233	}	275	XFree (virtual_root_window);
234	else
235	fprintf (stderr,
236	"__SWM_VROOT property type mismatch");
237	}	276	break;
238	}	277	}
239	else	278	}
240	fprintf (stderr,
241	"failed to get __SWM_VROOT property on window 0x%lx",
242	windows[i]);
243	}
244		279
245	if (count)
246	XFree (windows);	280	XFree (windows);
247	}	281	}
248	else	282	else
249	fprintf (stderr, "Can't query tree on root window 0x%lx",	283	fprintf (stderr, "Can't query tree on root window 0x%lx", root);
250	real_root_window);
251	}	284	}
252	else
253	/* This shouldn't happen. The Xlib documentation is wrong BTW. */
254	fprintf (stderr, "Can't intern atom __SWM_VROOT");
255
256	return real_root_window;
257	}	285	}
		286	#endif /* USE_TOON_GET_ROOT_WINDOW */
258		287
259	void	288	static void
260	InitWindow (void)	289	InitWindow (void)
261	{	290	{
262	XGCValues gcv;	291	XGCValues gcv;
263	unsigned long gcm;	292	unsigned long gcm;
264	int screen, ScreenWidth, ScreenHeight;	293	int screen, ScreenWidth, ScreenHeight;
		294	struct logfile_entry *e;
265		295
266	if (!(disp = XOpenDisplay (dispname)))	296	if (!(disp = XOpenDisplay (dispname)))
267	{	297	{
268	fprintf (stderr, "Can't open display %s.\n", dispname);	298	fprintf (stderr, "Can't open display %s.\n", dispname);
269	exit (1);	299	exit (1);
…		…
271		301
272	screen = DefaultScreen (disp);	302	screen = DefaultScreen (disp);
273	ScreenHeight = DisplayHeight (disp, screen);	303	ScreenHeight = DisplayHeight (disp, screen);
274	ScreenWidth = DisplayWidth (disp, screen);	304	ScreenWidth = DisplayWidth (disp, screen);
275		305
		306	if (opt_windowed)
		307	{
		308	XRectangle rect = { };
		309	XSetWindowAttributes attr;
		310
		311	attr.background_pixmap = ParentRelative;
		312	attr.override_redirect = True;
		313
		314	root = XCreateWindow (
		315	disp, DefaultRootWindow (disp), 0, 0, DisplayWidth (disp, screen), DisplayHeight (disp, screen),
		316	0, CopyFromParent, InputOutput, CopyFromParent,
		317	CWOverrideRedirect | CWBackPixmap, &attr);
		318
		319	XMapWindow (disp, root);
		320	XLowerWindow (disp, root);
		321
		322	XserverRegion region = XFixesCreateRegion (disp, &rect, 1);
		323	XFixesSetWindowShapeRegion (disp, root, ShapeInput, 0, 0, region);
		324	XFixesDestroyRegion (disp, region);
		325	}
		326	else
276	root = root_window (disp, screen);	327	find_root_window (disp, screen);
277		328
278	gcm = GCBackground;	329	gcm = GCBackground;
279	gcv.graphics_exposures = True;	330	gcv.graphics_exposures = True;
280	WinGC = XCreateGC (disp, root, gcm, &gcv);	331	WinGC = XCreateGC (disp, root, gcm, &gcv);
281	XMapWindow (disp, root);	332	XMapWindow (disp, root);
		333
282	XSetForeground (disp, WinGC, GetColor (DEF_COLOR));	334	XSetForeground (disp, WinGC, GetColor (DEF_COLOR));
283		335
		336	for (e = loglist; e; e = e->next)
284	{	337	{
285	char **missing_charset_list;	338	char **missing_charset_list;
286	int missing_charset_count;	339	int missing_charset_count;
287	char *def_string;	340	char *def_string;
288		341
289	fontset = XCreateFontSet (disp, fontname,	342	e->fontset = XCreateFontSet (disp, e->fontname,
290	&missing_charset_list, &missing_charset_count,	343	&missing_charset_list, &missing_charset_count,
291	&def_string);	344	&def_string);
292
293	if (missing_charset_count)	345	if (missing_charset_count)
		346	{
		347	#if 0
		348	fprintf (stderr,
		349	"Missing charsets in String to FontSet conversion (%s)\n",
		350	missing_charset_list[0]);
		351	#endif
		352	XFreeStringList (missing_charset_list);
		353	}
		354
		355	if (!e->fontset)
		356	{
		357	fprintf (stderr, "unable to create fontset for font '%s', exiting.\n", e->fontname);
		358	exit (1);
		359	}
		360
294	{	361	{
295	fprintf (stderr,	362	XFontSetExtents *xfe = XExtentsOfFontSet (e->fontset);
296	"Missing charsets in String to FontSet conversion (%s)\n",	363
297	missing_charset_list[0]);	364	e->font_height = xfe->max_logical_extent.height;
298	XFreeStringList (missing_charset_list);	365	e->font_ascent = -xfe->max_logical_extent.y;
299	}	366	}
300	}
301		367
302	if (!fontset)	368	if (e->font_height > height - effect_y_space)
		369	{
		370	fprintf(stderr, "\n the display isn't tall enough to display a single line in font '%s'\n",
		371	e->fontname);
		372	fprintf(stderr, "\n the geometry in use is %d pixels tall\n", height);
		373	fprintf(stderr, "\n font '%s' is %d pixels tall\n", e->fontname, e->font_height);
		374	if (effect_y_space)
		375	fprintf(stderr, "\n the shade or outline options need an extra %d pixel%s of vertical space\n",
		376	effect_y_space, effect_y_space == 1 ? "" : "s");
		377	fprintf(stderr, "\n");
		378	exit(1);
		379	}
303	{	380	}
304	fprintf (stderr, "unable to create fontset, exiting.\n");
305	exit (1);
306	}
307
308	{
309	XFontSetExtents *xfe = XExtentsOfFontSet (fontset);
310
311	font_height = xfe->max_logical_extent.height;
312	font_ascent = -xfe->max_logical_extent.y;
313	}
314		381
315	if (geom_mask & XNegative)	382	if (geom_mask & XNegative)
316	win_x = win_x + ScreenWidth - width;	383	win_x = win_x + ScreenWidth - width;
317	if (geom_mask & YNegative)	384	if (geom_mask & YNegative)
318	win_y = win_y + ScreenHeight - height;	385	win_y = win_y + ScreenHeight - height;
319		386
320	if (opt_outline)
321	{
322	/* adding outline increases the total width and height by 2
323	pixels each, and offsets the text one pixel right and one
324	pixel down */
325	effect_x_space = effect_y_space = 2;
326	effect_x_offset = effect_y_offset = 1;
327	}
328	else if (opt_shade)
329	{
330	/* adding a shadow increases the space used */
331	effect_x_space = abs(SHADE_X);
332	effect_y_space = abs(SHADE_Y);
333	/* if the shadow is to the right and below then we don't need
334	* to move the text to make space for it, but shadows to the left
335	* and above need accomodating */
336	effect_x_offset = SHADE_X > 0 ? 0 : -SHADE_X;
337	effect_y_offset = SHADE_Y > 0 ? 0 : -SHADE_Y;
338	}
339	else
340	{
341	effect_x_space = effect_y_space = 0;
342	effect_x_offset = effect_y_offset = 0;
343	}
344
345	/* if we are using -shade or -outline, there will be less usable
346	* space for output */
347	listlen = (height - effect_y_space) / font_height;
348
349	if (!listlen)
350	{
351	fprintf (stderr, "height too small for a single line, setting to %d\n",
352	font_height);
353	listlen = 1;
354	}
355
356	/* leave the height how the user requested it. it might not all be
357	* used, but this will allow the geometry to be tuned more accurately
358	* (with the -frame option)
359	* the old code did this:
360	* height = listlen * font_height + effect_y_space; */
361		387	{
		388	struct logfile_entry *e;
		389
		390	for (e = loglist; e; e = e->next)
		391	e->color = GetColor (e->colorname);
		392	}
		393
362	XSelectInput (disp, root, ExposureMask | FocusChangeMask);	394	XSelectInput (disp, root, ExposureMask | FocusChangeMask);
363	}	395	}
364		396
365	/*	397	/*
366	* if redraw() is passwd a non-zero argument, it does a complete	398	* if redraw () is passwd a non-zero argument, it does a complete
367	* redraw, rather than an update. if the argument is zero (and	399	* redraw, rather than an update. if the argument is zero (and
368	* -noflicker is in effect) then only the lines which have changed	400	* -noflicker is in effect) then only the lines which have changed
369	* since the last draw are redrawn.	401	* since the last draw are redrawn.
370	*	402	*
371	* the rest is handled by regular refresh()'es	403	* the rest is handled by regular refresh ()'es
372	*/	404	*/
373	void	405	static void
374	redraw (int redraw_all)	406	redraw (int redraw_all)
375	{	407	{
376	XSetClipMask (disp, WinGC, None);	408	XSetClipMask (disp, WinGC, None);
377	refresh (0, 32768, 1, redraw_all);	409	refresh (0, 32768, 1, redraw_all);
378	}	410	}
379		411
		412	static void
		413	draw_text (Display *disp, Window root, GC WinGC, int x, int y, struct line_node *line, int foreground)
		414	{
		415	if (line->wrapped_right && opt_justify && line->breaks)
		416	{
		417	int i;
		418	for (i = 0; i < line->num_words; i++)
		419	XmbDrawString (disp, root, line->logfile->fontset, WinGC,
		420	x + line->breaks[i].width + ((i * line->free_pixels) / (line->num_words - 1))
		421	+ continuation_width * line->wrapped_left, y,
		422	line->line + line->breaks[i].index,
		423	line->breaks[i].len);
		424
		425	if (line->wrapped_left)
		426	{
		427	if (foreground) XSetForeground (disp, WinGC, continuation_color);
		428	XmbDrawString (disp, root, line->logfile->fontset, WinGC, x, y, continuation, continuation_length);
		429	}
		430	}
		431	else
		432	{
		433	XmbDrawString (disp, root, line->logfile->fontset, WinGC, x + continuation_width * line->wrapped_left,
		434	y, line->line, line->len);
		435
		436	if (line->wrapped_left)
		437	{
		438	if (foreground) XSetForeground (disp, WinGC, continuation_color);
		439	XmbDrawString (disp, root, line->logfile->fontset, WinGC, x, y, continuation, continuation_length);
		440	}
		441	}
		442	}
		443
380	/* Just redraw everything without clearing (i.e. after an EXPOSE event) */	444	/* Just redraw everything without clearing (i.e. after an EXPOSE event) */
381	void	445	static void
382	refresh (int miny, int maxy, int clear, int refresh_all)	446	refresh (int miny, int maxy, int clear, int refresh_all)
383	{	447	{
384	int lin;	448	int lin = 0;
385	int offset = listlen * font_height + font_ascent + effect_y_offset;	449	int space = height;
		450	int offset;
386	unsigned long black_color = GetColor ("black");	451	unsigned long black_color = GetColor ("black");
		452	struct line_node *line;
		453	int step_per_line;
		454	int foreground = 0;
387		455
388	miny -= win_y + font_height;	456	if (opt_reverse)
389	maxy -= win_y - font_height;	457	offset = effect_y_offset;
		458	else
		459	offset = height + effect_y_offset;
		460
		461	miny -= win_y;
		462	maxy -= win_y;
390		463
391	if (clear && !opt_noflicker)	464	if (clear && !opt_noflicker)
392	XClearArea (disp, root, win_x, win_y, width, height, False);	465	XClearArea (disp, root, win_x, win_y, width + MARGIN_OF_ERROR, height, False);
393		466
394	for (lin = listlen; lin--;)	467	for (line = linelist; line; line = line->next, lin++)
395	{	468	{
396	struct linematrix *line = lines + (opt_reverse ? listlen - lin - 1 : lin);
397	struct displaymatrix *display_line = display + lin;	469	struct displaymatrix *display_line;
398		470
399	offset -= font_height;	471	if (opt_noflicker && lin >= listlen)
		472	{
		473	int i = listlen;
		474	listlen *= 1.5;
		475	display = xrealloc(display, listlen * sizeof(struct displaymatrix));
		476	for (; i < listlen; i++)
		477	{
		478	display[i].line = xstrdup ("");
		479	display[i].len = 0;
		480	display[i].offset = 0;
		481	display[i].buffer_size = 0;
		482	}
		483	}
400		484
		485	display_line = display + lin;
		486
		487	step_per_line = line->logfile->font_height + effect_y_space;
		488	if (step_per_line > space)
		489	break;
		490
		491	if (!opt_reverse)
		492	offset -= step_per_line;
		493
		494	offset += line->logfile->font_ascent;
		495
		496	miny -= line->logfile->font_height;
		497	maxy += line->logfile->font_height;
		498
401	if (offset < miny || offset > maxy)	499	if (offset >= miny && offset <= maxy)
402	continue;	500	{
403
404	/* if this line is a different than it was, then it	501	/* if this line is a different than it was, then it
405	* needs displaying */	502	* needs displaying */
406	if (!opt_noflicker	503	if (!opt_noflicker
407	|| refresh_all	504	|| refresh_all
408	|| display_line->len != line->len	505	|| display_line->len != line->len
		506	|| display_line->color != line->logfile->color
		507	|| display_line->offset != offset
409	|| memcmp (display_line->line, line->line, line->len))	508	|| memcmp (display_line->line, line->line, line->len))
410	{	509	{
411	/* don't bother updating the record of what has been	510	/* don't bother updating the record of what has been
412	* displayed if -noflicker isn't in effect, since we redraw	511	* displayed if -noflicker isn't in effect, since we redraw
413	* the whole display every time anyway */	512	* the whole display every time anyway */
414	if (opt_noflicker)	513	if (opt_noflicker)
415	{	514	{
416	/* update the record of what has been displayed;	515	/* update the record of what has been displayed;
417	* first make sure the buffer is big enough */	516	* first make sure the buffer is big enough */
418	if (display_line->buffer_size <= line->len)	517	if (display_line->buffer_size < line->len)
419	{	518	{
420	display_line->buffer_size = line->len + 1;	519	display_line->buffer_size = line->len;
421	display_line->line = xrealloc (display_line->line, display_line->buffer_size);	520	display_line->line = xrealloc (display_line->line, display_line->buffer_size);
422	}	521	}
423		522
424	display_line->len = line->len;	523	display_line->len = line->len;
		524	display_line->color = line->logfile->color;
		525	display_line->offset = offset;
425	memcpy (display_line->line, line->line, line->len);	526	memcpy (display_line->line, line->line, line->len);
426		527
427	if (clear)	528	if (clear)
		529	{
		530	#ifdef DEBUG
		531	static int toggle;
		532	toggle = 1 - toggle;
		533	XSetForeground (disp, WinGC, toggle ? GetColor ("cyan") : GetColor ("yellow"));
		534	XFillRectangle (disp, root, WinGC, win_x, win_y + offset - line->logfile->font_ascent,
		535	width, step_per_line);
		536	#else /* DEBUG */
428	XClearArea (disp, root, win_x, win_y + offset - font_ascent,	537	XClearArea (disp, root, win_x, win_y + offset - line->logfile->font_ascent,
429	width + effect_x_space, font_height + effect_y_space, False);	538	width + MARGIN_OF_ERROR, step_per_line, False);
430	}	539	#endif /* DEBUG */
		540	}
		541	}
431		542
432	if (opt_outline)	543	if (opt_outline)
433	{	544	{
434	int x, y;	545	int x, y;
435	XSetForeground (disp, WinGC, black_color);	546	XSetForeground (disp, WinGC, black_color);
436		547
437	for (x = -1; x < 2; x += 2)	548	for (x = -1; x <= 1; x += 2)
438	for (y = -1; y < 2; y += 2)	549	for (y = -1; y <= 1; y += 2)
439	XmbDrawString (disp, root, fontset, WinGC,	550	draw_text (disp, root, WinGC,
440	win_x + effect_x_offset + x,	551	win_x + effect_x_offset + x,
441	win_y + y + offset,	552	win_y + y + offset, line, foreground = 0);
442	line->line, line->len);
443	}	553	}
444	else if (opt_shade)	554	else if (opt_shade)
445	{	555	{
446	XSetForeground (disp, WinGC, black_color);	556	XSetForeground (disp, WinGC, black_color);
447	XmbDrawString (disp, root, fontset, WinGC,	557	draw_text (disp, root, WinGC,
448	win_x + effect_x_offset + SHADE_X,	558	win_x + effect_x_offset + SHADE_X,
449	win_y + offset + SHADE_Y,	559	win_y + offset + SHADE_Y, line, foreground = 0);
450	line->line, line->len);
451	}	560	}
452		561
453	XSetForeground (disp, WinGC, line->color);	562	XSetForeground (disp, WinGC, line->logfile->color);
454	XmbDrawString (disp, root, fontset, WinGC,	563	draw_text (disp, root, WinGC,
455	win_x + effect_x_offset,	564	win_x + effect_x_offset,
456	win_y + offset,	565	win_y + offset, line, foreground = 1);
457	line->line, line->len);	566	}
458	}	567	}
		568
		569	if (opt_reverse)
		570	offset += step_per_line;
		571	offset -= line->logfile->font_ascent;
		572
		573	miny += line->logfile->font_height;
		574	maxy -= line->logfile->font_height;
		575
		576	space -= step_per_line;
		577	}
		578
		579	if (space > 0 && clear)
		580	{
		581	#ifdef DEBUG
		582	XSetForeground (disp, WinGC, GetColor ("orange"));
		583	XFillRectangle (disp, root, WinGC, win_x, win_y + offset - (opt_reverse ? 0 : space),
		584	width, space);
		585	#else /* DEBUG */
		586	XClearArea (disp, root, win_x, win_y + offset - (opt_reverse ? 0 : space),
		587	width + MARGIN_OF_ERROR, space, False);
		588	#endif
		589	}
		590
		591	/* at least one of the lines must fit in the allocated area. we've
		592	* already checked at initialisation time that all the fonts are small
		593	* enough to fit at least one line in the display area, but assert it
		594	* again here to be sure */
		595	assert(line != linelist);
		596
		597	/* any lines that didn't just get looked at are never going to be, so break the chain */
		598	if (line) line->prev->next = 0;
		599
		600	/* and throw them all away */
		601	while (line)
		602	{
		603	struct line_node *this = line;
		604	line = line->next;
		605	if (this->logfile && this->logfile->last == this)
		606	this->logfile->last = NULL;
		607	free (this->line);
		608	free (this->breaks);
		609	free (this);
459	}	610	}
460		611
461	if (opt_frame)	612	if (opt_frame)
462	{	613	{
463	XSetForeground (disp, WinGC, GetColor (def_color));	614	XSetForeground (disp, WinGC, GetColor (def_color));
		615	/* note that XDrawRectangle() draws a rectangle one pixel bigger
		616	* in both dimensions than you ask for, hence the subtractions.
		617	* XFillRectangle() doesn't suffer from this problem */
464	XDrawRectangle (disp, root, WinGC, win_x - 0, win_y - 0, width - 1, height - 1);	618	XDrawRectangle (disp, root, WinGC, win_x - 0, win_y - 0, width - 1, height - 1);
465	}	619	}
466	}	620	}
467		621
468	#if HAS_REGEX	622	#if HAS_REGEX
469	void	623	void void
470	transform_line (char *s)	624	transform_line (char *s)
471	{	625	{
472	#ifdef I_AM_Md	626	#ifdef I_AM_Md
473	int i;	627	int i;
474	if (1)	628	if (1)
…		…
485	regmatch_t matched[16];	639	regmatch_t matched[16];
486		640
487	i = regexec (transformre, s, 16, matched, 0);	641	i = regexec (transformre, s, 16, matched, 0);
488	if (i == 0)	642	if (i == 0)
489	{ /* matched */	643	{ /* matched */
490	int match_start = matched[0].rm_so;	644	int match_start = matched[0].rm_so;
491	int match_end = matched[0].rm_eo;	645	int match_end = matched[0].rm_eo;
492	int old_len = match_end - match_start;	646	int old_len = match_end - match_start;
493	int new_len = strlen(transform_to);	647	int new_len = strlen (transform_to);
494	int old_whole_len = strlen(s);	648	int old_whole_len = strlen (s);
		649
495	printf("regexp was matched by '%s' - replace with '%s'\n", s, transform_to);	650	printf ("regexp was matched by '%s' - replace with '%s'\n", s, transform_to);
496	printf("match is from %d to %d\n",	651	printf ("match is from %d to %d\n", match_start, match_end);
497	match_start, match_end);
498	if (new_len > old_len) {	652	if (new_len > old_len)
499	s = xrealloc(s, old_whole_len + new_len - old_len);	653	s = xrealloc (s, old_whole_len + new_len - old_len);
500	}	654
501	if (new_len != old_len) {	655	if (new_len != old_len)
		656	{
502	memcpy(s + match_end + new_len - old_len,	657	memcpy (s + match_end + new_len - old_len,
503	s + match_end,	658	s + match_end,
504	old_whole_len - match_end);	659	old_whole_len - match_end);
505	s[old_whole_len + new_len - old_len] = '\0';	660	s[old_whole_len + new_len - old_len] = '\0';
506	}	661	}
		662
507	memcpy(s + match_start,	663	memcpy (s + match_start,
508	transform_to,	664	transform_to,
509	new_len);	665	new_len);
510	printf("transformed to '%s'\n", s);	666	printf ("transformed to '%s'\n", s);
511	}	667	}
512	else	668	else
513	{
514	printf("regexp was not matched by '%s'\n", s);	669	printf ("regexp was not matched by '%s'\n", s);
515	}
516	}	670	}
517	}	671	}
518	#endif	672	#endif
519		673
520	char *	674	/*
521	concat_line (const char *p1, const char *p2)	675	* appends p2 to the end of p1, if p1 is not null
		676	* otherwise allocates a new string and copies p2 to it
		677	*/
		678	static char *
		679	concat_line (char *p1, const char *p2)
522	{	680	{
523	int l1 = p1 ? strlen (p1) : 0;	681	int l1 = p1 ? strlen (p1) : 0;
524	int l2 = strlen (p2);	682	int l2 = strlen (p2);
525	char *r = xmalloc (l1 + l2 + 1);	683	char *r;
526		684
527	memcpy (r, p1, l1);	685	assert (p2);
		686
		687	if (p1)
		688	r = xrealloc(p1, l1 + l2 + 1);
		689	else
		690	r = xmalloc (l2 + 1);
		691
528	memcpy (r + l1, p2, l2);	692	memcpy (r + l1, p2, l2);
529	r[l1 + l2] = 0;	693	r[l1 + l2] = 0;
530		694
531	return r;	695	return r;
532	}	696	}
533		697
534	/*	698	/*
535	* HACK-1: This routine should read a single line, no matter how long.	699	* This routine can read a line of any length if it is called enough times.
536	*/	700	*/
537	int	701	static int
538	lineinput (struct logfile_entry *logfile)	702	lineinput (struct logfile_entry *logfile)
539	{	703	{
540	char buff[1024], *p = buff;	704	char buff[1024], *p;
541	int ch;	705	int ch;
542	/* HACK-2: add on the length of any partial line which we will be appending to */	706	/* HACK-2: add on the length of any partial line which we will be appending to */
543	int ofs = logfile->buf ? strlen (logfile->buf) : 0;	707	int ofs = logfile->buf ? strlen (logfile->buf) : 0;
544		708
		709	/* this loop ensures that the whole line is read, even if it's
		710	* longer than the buffer. we need to do this because when --whole
		711	* is in effect we don't know whether to display the line or not
		712	* until we've seen how (ie. whether) it ends */
545	do	713	do
546	{	714	{
		715	p = buff;
		716	do
		717	{
547	ch = fgetc (logfile->fp);	718	ch = fgetc (logfile->fp);
548		719
549	if (ch == '\n' || ch == EOF)	720	if (ch == '\n' || ch == EOF)
550	break;	721	break;
551	else if (ch == '\r')	722	else if (ch == '\r')
552	continue; /* skip */	723	continue; /* skip */
553	else if (ch == '\t')	724	else if (ch == '\t')
554	{	725	{
555	do	726	do
556	{	727	{
557	*p++ = ' ';	728	*p++ = ' ';
		729	ofs++;
		730	}
		731	while (ofs & 7);
		732	}
		733	else
		734	{
		735	*p++ = ch;
558	ofs++;	736	ofs++;
559	}	737	}
560	while (ofs & 7);
561	}
562	else
563	{	738	}
564	*p++ = ch;
565	ofs++;
566	}
567	}
568	while (p < buff + (sizeof buff) - 8 - 1);	739	while (p < buff + (sizeof buff) - 8 - 1);
569		740
570	if (p == buff && ch == EOF)	741	if (p == buff && ch == EOF)
571	return 0;	742	return 0;
572		743
573	*p = 0;	744	*p = 0;
574		745
575	p = concat_line (logfile->buf, buff);	746	p = logfile->buf = concat_line (logfile->buf, buff);
576	free (logfile->buf); logfile->buf = p;	747	}
		748	while (ch != '\n' && ch != EOF);
577		749
578	logfile->lastpartial = logfile->partial;	750	logfile->lastpartial = logfile->partial;
579	/* there are 3 ways we could have exited the loop: reading '\n',	751	/* there are 3 ways we could have exited the loop: reading '\n',
580	* reaching EOF, or filling the buffer; the 2nd and 3rd of these	752	* reaching EOF, or filling the buffer; the 2nd and 3rd of these
581	* both result in a partial line */	753	* both result in a partial line */
582	logfile->partial = ch != '\n';	754	logfile->partial = ch != '\n';
583		755
584	if (logfile->partial && opt_whole)	756	if (logfile->partial && opt_whole)
585	return 0;	757	return 0;
586		758
587	#if HAS_REGEX	759	#if HAS_REGEX
588	transform_line (logfile->buf);	760	transform_line (logfile->buf);
…		…
593	/* input: reads file->fname	765	/* input: reads file->fname
594	* output: fills file->fp, file->inode	766	* output: fills file->fp, file->inode
595	* returns file->fp	767	* returns file->fp
596	* in case of error, file->fp is NULL	768	* in case of error, file->fp is NULL
597	*/	769	*/
598	FILE *	770	static FILE *
599	openlog (struct logfile_entry * file)	771	openlog (struct logfile_entry *file)
600	{	772	{
601	struct stat stats;	773	struct stat stats;
602		774
603	if ((file->fp = fopen (file->fname, "r")) == NULL)	775	if ((file->fp = fopen (file->fname, "r")) == NULL)
604	{	776	{
…		…
616	else	788	else
617	file->inode = stats.st_ino;	789	file->inode = stats.st_ino;
618		790
619	if (opt_noinitial)	791	if (opt_noinitial)
620	fseek (file->fp, 0, SEEK_END);	792	fseek (file->fp, 0, SEEK_END);
621	else if (stats.st_size > (listlen + 1) * width)	793	else /* if (stats.st_size > (listlen + 1) * width)
		794	* HACK - 'width' is in pixels - how are we to know how much text will fit?
622	fseek (file->fp, -((listlen + 2) * width), SEEK_END);	795	* fseek (file->fp, -((listlen + 2) * width/10), SEEK_END); */
		796	fseek (file->fp, -5000, SEEK_END);
623		797
624	file->last_size = stats.st_size;	798	file->last_size = stats.st_size;
625	return file->fp;	799	return file->fp;
626	}	800	}
627		801
628	void	802	static void
629	reopen (void)	803	reopen (void)
630	{	804	{
631	struct logfile_entry *e;	805	struct logfile_entry *e;
632		806
633	for (e = loglist; e; e = e->next)	807	for (e = loglist; e; e = e->next)
…		…
642	}	816	}
643		817
644	do_reopen = 0;	818	do_reopen = 0;
645	}	819	}
646		820
647	void	821	static void
648	check_open_files (void)	822	check_open_files (void)
649	{	823	{
650	struct logfile_entry *e;	824	struct logfile_entry *e;
651	struct stat stats;	825	struct stat stats;
652		826
…		…
670	{ /* file renamed? */	844	{ /* file renamed? */
671	if (e->fp)	845	if (e->fp)
672	fclose (e->fp);	846	fclose (e->fp);
673	if (openlog (e) == NULL)	847	if (openlog (e) == NULL)
674	continue;	848	continue;
		849	if (fstat (fileno (e->fp), &stats) < 0)
		850	continue;
675	}	851	}
676		852
677	if (stats.st_size < e->last_size)	853	if (stats.st_size < e->last_size)
678	{ /* file truncated? */	854	{ /* file truncated? */
679	fseek (e->fp, 0, SEEK_SET);	855	fseek (e->fp, 0, SEEK_SET);
…		…
681	}	857	}
682	}	858	}
683	}	859	}
684		860
685	/*	861	/*
686	* insert a single physical line (that must be short enough to fit)	862	* insert a single node in the list of screen lines and return a
687	* at position "idx" by pushing up lines above it. the caller	863	* pointer to the new node.
688	* MUST then fill in lines[idx] with valid data.	864	* the caller MUST then fill in ret->line and ret->len with valid
		865	* data.
689	*/	866	*/
690	static void	867	static struct line_node *
691	insert_line (int idx)	868	new_line_node (struct logfile_entry *log)
692	{	869	{
693	int cur_line;	870	struct line_node *new = xmalloc (sizeof (struct line_node));
694	struct logfile_entry *current;
695		871
696	free (lines[0].line);	872	new->logfile = log;
		873	new->wrapped_left = 0;
		874	new->wrapped_right = 0;
		875	new->breaks = 0;
697		876
698	for (cur_line = 0; cur_line < idx; cur_line++)	877	assert(log);
699	lines[cur_line] = lines[cur_line + 1];
700		878
701	for (current = loglist; current; current = current->next)	879	if (!log || !log->last)
702	if (current->index <= idx)	880	{
703	current->index--;	881	new->next = linelist;
		882	new->next->prev = new;
		883
		884	new->prev = NULL;
		885	linelist = new;
		886	}
		887	else
		888	{
		889	/* 2 pointers from the new node */
		890	new->next = log->last;
		891	new->prev = log->last->prev;
		892
		893	/* 2 pointers back to the new node */
		894	if (new->next) new->next->prev = new;
		895	if (new->prev) new->prev->next = new;
		896
		897	/* if this is a new first entry in the list then update
		898	* 'linelist' */
		899	if (log->last == linelist)
		900	linelist = new;
		901	}
		902
		903	/* update the logfile record */
		904	if (log)
		905	log->last = new;
		906
		907	return new;
704	}	908	}
705		909
706	/*	910	/*
707	* remove a single physical line at position "idx" by moving the lines above it	911	* this is called after either adding a new line or appending to an
708	* down and inserting a "~" line at the top.	912	* old one. in both cases it's possible that the line no longer fits,
		913	* and needs wrapping. this function checks the last line associated
		914	* with the supplied logfile.
709	*/	915	*/
710	static void	916	static void
711	delete_line (int idx)	917	possibly_split_long_line (struct logfile_entry *log)
712	{	918	{
713	int cur_line;	919	char *str = log->last->line;
714	struct logfile_entry *current;
715
716	for (cur_line = idx; cur_line > 0; cur_line--)
717	lines[cur_line] = lines[cur_line - 1];
718
719	lines[0].line = xstrdup ("~");
720
721	for (current = loglist; current; current = current->next)
722	if (current->index >= 0 && current->index <= idx)
723	current->index++;
724	}
725
726	/*
727	* takes a logical log file line and splits it into multiple physical
728	* screen lines by splitting it whenever a part becomes too long.
729	* lal lines will be inserted at position "idx".
730	*/
731	static void
732	split_line (int idx, const char *str, unsigned long color)
733	{
734	int l = strlen (str);	920	int l = strlen (str);
735	int last_wrapped = 0;
736	const char *p = str;	921	char *p = str;
737	static int continuation_width = -1;	922	struct line_node *line;
738	static int continuation_length;	923	int spaces;
		924	static struct breakinfo *breaks;
		925	static int break_buffer_size;
739		926
740	/* only calculate the continuation's width once */	927	/* only calculate the continuation's width once */
741	if (continuation_width == -1)	928	if (continuation_width == -1)
742	{	929	{
743	continuation_length = strlen(continuation);	930	continuation_length = strlen (continuation);
744	continuation_width = XmbTextEscapement (fontset, continuation, continuation_length);	931	continuation_width = XmbTextEscapement (log->fontset, continuation, continuation_length);
		932	continuation_color = GetColor (cont_color);
		933
		934	/* make an array to store information about the location of
		935	* spaces in the line */
		936	if (opt_justify)
		937	{
		938	break_buffer_size = 32;
		939	breaks = xmalloc (break_buffer_size * sizeof (struct breakinfo));
		940	}
745	}	941	}
746		942
747	do	943	do
748	{	944	{
749	const char *beg = p;	945	const char *beg = p;
750	int w = last_wrapped ? continuation_width : 0;	946	int start_w = log->last->wrapped_left ? continuation_width : 0;
		947	int w = start_w;
751	int wrapped = 0;	948	int wrapped = 0;
752	const char *break_p = NULL;	949	char *break_p = NULL;
		950	int width_at_break_p = 0;
		951	int prefix_len;
		952
		953	spaces = 0;
		954
		955	if (opt_justify)
		956	breaks[spaces].index = breaks[spaces].width = 0;
753		957
754	while (*p)	958	while (*p)
755	{	959	{
		960	int cw, len;
		961
756	/* find the length in bytes of the next multibyte character */	962	/* find the length in bytes of the next multibyte character */
757	int len = mblen (p, l);	963	len = mblen (p, l);
758	if (len <= 0)	964	if (len <= 0)
759	len = 1; /* ignore (don't skip) illegal character sequences */	965	len = 1; /* ignore (don't skip) illegal character sequences */
760		966
761	/* find the width in pixels of the next character */	967	/* find the width in pixels of the next character */
762	int cw = XmbTextEscapement (fontset, p, len);	968	cw = XmbTextEscapement (log->fontset, p, len);
		969	if (opt_wordwrap && len == 1 && p[0] == ' ' && p != break_p + 1)
		970	{
		971	break_p = p;
		972	width_at_break_p = w;
		973	spaces++;
		974
		975	if (opt_justify)
		976	{
		977	/* increase the size of the 'breaks' array when
		978	* necessary */
		979	if (spaces >= break_buffer_size)
		980	{
		981	break_buffer_size *= 1.5;
		982	breaks = xrealloc (breaks, break_buffer_size * sizeof (struct breakinfo));
		983	}
		984
		985	/* store information about (a) the location of each
		986	* space */
		987	breaks[spaces].index = p + 1 - beg;
		988	/* (b) the width (in pixels) of the string up to
		989	* this space */
		990	breaks[spaces].width = cw + w - start_w;
		991	/* (c) the length of each 'word' */
		992	breaks[spaces-1].len = breaks[spaces].index - breaks[spaces-1].index;
		993	}
		994	}
		995
763	if (cw + w > width - effect_x_space)	996	if (cw + w > width - effect_x_space)
764	{	997	{
765	if (p == beg)	998	if (p == beg)
766	{	999	{
767	fprintf(stderr, "we can't even fit a single character onto the line\n");	1000	fprintf (stderr, "we can't even fit a single character onto the line\n");
768	if (len == 1) fprintf(stderr, "(the character we couldn't fit was '%c')\n", *p);	1001	if (len == 1) fprintf (stderr, "(the character we couldn't fit was '%c')\n", *p);
769	exit(1);	1002	exit (1);
770	}	1003	}
771		1004
772	wrapped = 1;	1005	wrapped = 1;
773	break;	1006	break;
774	}	1007	}
775
776	if (opt_wordwrap && len == 1 && p[0] == ' ')
777	break_p = p;
778		1008
779	w += cw;	1009	w += cw;
780	p += len;	1010	p += len;
781	l -= len;	1011	l -= len;
782	}	1012	}
783		1013
784	/* if we're wrapping at spaces, and the line is long enough to	1014	/* if we're wrapping at spaces, and the line is long enough to
785	* wrap, and we've seen a space already, and the space wasn't	1015	* wrap, and we've seen a space already, and the space wasn't
786	* the first character on the line, then wrap at the space */	1016	* the first character on the line, then wrap at the space */
		1017	if (!wrapped)
		1018	break;
		1019
		1020	/* choose where to break the line */
787	if (opt_wordwrap && wrapped && break_p && break_p != beg)	1021	if (opt_wordwrap && break_p && break_p != beg)
788	{
789	l += p - break_p;
790	p = break_p;
791	}
792
793	{	1022	{
794	/* HACK-4 - consider inserting the 'continuation string'	1023	prefix_len = break_p - beg;
795	* before the rest of the wrapped line */	1024	p = break_p;
796	int len = p - beg + (last_wrapped ? continuation_length : 0);	1025	w = width_at_break_p;
797	char *s = xmalloc (len + 1);
798	if (last_wrapped)
799	{
800	memcpy (s, continuation, continuation_length);
801	memcpy (s + continuation_length, beg, p - beg);
802	}
803	else
804	memcpy (s, beg, len);
805		1026
806	s[len] = 0;	1027	/* if breaking at a space, skip all adjacent spaces */
807	insert_line (idx);	1028	while (*p == ' ')
808	lines[idx].line = s;	1029	{
809	lines[idx].len = len;	1030	int len = mblen (p, l);
810	lines[idx].color = color;	1031	if (len != 1) break;
		1032	p++;
		1033	}
		1034
		1035	if (opt_justify)
		1036	{
		1037	spaces--;
		1038	breaks[spaces].len--;
		1039	}
811	}	1040	}
		1041	else
		1042	prefix_len = p - beg;
812		1043
813	/* if we wrapped at a space, don't display the space */	1044	/* make a copy of the tail end of the string */
814	if (opt_wordwrap && wrapped && break_p && break_p != beg)	1045	p = xstrdup (p);
815	{
816	l--;
817	p++;
818	}
819		1046
820	last_wrapped = wrapped;	1047	/* and reduce the size of the head of the string */
		1048	log->last->line = xrealloc (log->last->line, prefix_len + 1);
		1049	log->last->len = prefix_len;
		1050	log->last->line[prefix_len] = '\0';
		1051
		1052	/* note that the head was wrapped on it's right */
		1053	log->last->wrapped_right = 1;
		1054
		1055	/* 'spaces' includes any space we broke on; we can only justify
		1056	* if there's at least one other space */
		1057	if (opt_justify && spaces &&
		1058	width - effect_x_space - width_at_break_p < spaces * log->font_height)
		1059	{
		1060	int i;
		1061	log->last->free_pixels = width - effect_x_space - w;
		1062	log->last->num_words = spaces + 1;
		1063	log->last->breaks = malloc (log->last->num_words * sizeof (struct breakinfo));
		1064	for (i = 0; i < log->last->num_words; i++)
		1065	log->last->breaks[i] = breaks[i];
		1066	}
		1067
		1068	line = new_line_node (log);
		1069	line->line = p;
		1070	l = line->len = strlen (p);
		1071
		1072	/* note that the tail end of the string is wrapped at its left */
		1073	line->wrapped_left = 1;
821	}	1074	}
822	while (l);	1075	while (l);
		1076	}
		1077
		1078	static void
		1079	insert_new_line (char *str, struct logfile_entry *log)
		1080	{
		1081	struct line_node *new;
		1082	new = new_line_node (log);
		1083	new->line = str;
		1084	new->len = strlen (str);
		1085
		1086	possibly_split_long_line (log);
823	}	1087	}
824		1088
825	/*	1089	/*
826	* append something to an existing physical line. this is done	1090	* append something to an existing physical line. this is done
827	* by deleting the file on-screen, concatenating the new data to it	1091	* by deleting the file on-screen, concatenating the new data to it
828	* and splitting it again.	1092	* and splitting it again.
829	*/	1093	*/
830	static void	1094	static void
831	append_line (int idx, const char *str)	1095	append_to_existing_line (char *str, struct logfile_entry *log)
832	{	1096	{
833	unsigned long color = lines[idx].color;	1097	char *old, *new;
834	char *old = lines[idx].line;	1098
		1099	assert(log);
		1100	assert(log->last);
		1101
		1102	old = log->last->line;
		1103	assert(old);
		1104
835	char *new = concat_line (old, str);	1105	new = concat_line (old, str);
836
837	free (old);	1106	free (str);
838		1107	log->last->line = new;
839	delete_line (idx);	1108	log->last->len = strlen (new);
840	split_line (idx, new, color);	1109	possibly_split_long_line (log);
841	}	1110	}
842		1111
843	static void	1112	static void
844	main_loop (void)	1113	main_loop (void)
845	{	1114	{
846	lines = xmalloc (sizeof (struct linematrix) * listlen);
847	display = xmalloc (sizeof (struct displaymatrix) * listlen);
848	int lin;	1115	int lin;
849	time_t lastreload;	1116	time_t lastreload;
850	Region region = XCreateRegion ();	1117	Region region = XCreateRegion ();
851	XEvent xev;	1118	XEvent xev;
852	struct logfile_entry *lastprinted = NULL;	1119	struct logfile_entry *lastprinted = NULL;
853	struct logfile_entry *current;	1120	struct logfile_entry *current;
854	int need_update = 1;	1121	int need_update = 1;
855		1122
		1123	display = xmalloc (sizeof (struct displaymatrix) * listlen);
		1124
856	lastreload = time (NULL);	1125	lastreload = time (NULL);
857		1126
858	/* Initialize linematrix */	1127	/* Initialize line_node */
859	for (lin = 0; lin < listlen; lin++)	1128	for (lin = 0; lin < listlen; lin++)
860	{	1129	{
		1130	struct line_node *e = xmalloc (sizeof (struct line_node));
861	lines[lin].line = xstrdup ("~");	1131	e->line = xstrdup ("~");
862	lines[lin].len = 1;	1132	e->len = 1;
		1133	e->logfile = loglist; /* this is only needed to get a color for the '~' */
		1134	e->wrapped_left = 0;
		1135	e->wrapped_right = 0;
		1136	e->breaks = 0;
		1137	e->next = NULL;
		1138	e->prev = linelist_tail;
		1139
		1140	if (!linelist)
		1141	linelist = e;
		1142	if (linelist_tail)
		1143	linelist_tail->next = e;
		1144	linelist_tail = e;
		1145
863	display[lin].line = xstrdup("");	1146	display[lin].line = xstrdup ("");
864	display[lin].len = 0;	1147	display[lin].len = 0;
		1148	display[lin].offset = 0;
865	display[lin].buffer_size = 1;	1149	display[lin].buffer_size = 0;
866	lines[lin].color = GetColor (def_color);
867	}	1150	}
868		1151
869	for (;;)	1152	for (;;)
870	{	1153	{
871	/* read logs */	1154	/* read logs */
…		…
882	/* if we're trying to update old partial lines in	1165	/* if we're trying to update old partial lines in
883	* place, and the last time this file was updated the	1166	* place, and the last time this file was updated the
884	* output was partial, and that partial line is not	1167	* output was partial, and that partial line is not
885	* too close to the top of the screen, then update	1168	* too close to the top of the screen, then update
886	* that partial line */	1169	* that partial line */
887	if (opt_update && current->lastpartial && current->index >= 0)	1170	if (opt_update && current->lastpartial && current->last)
888	{	1171	{
889	int idx = current->index;
890	append_line (idx, current->buf);	1172	append_to_existing_line (current->buf, current);
891	current->index = idx;	1173	current->buf = 0;
892	free (current->buf), current->buf = 0;
893	continue;	1174	continue;
894	}	1175	}
895		1176
		1177	/* if all we just read was a newline ending a line that we've already displayed, skip it */
		1178	if (current->buf[0] == '\0' && current->lastpartial)
		1179	{
		1180	free(current->buf);
		1181	current->buf = 0;
		1182	continue;
		1183	}
		1184
896	/* print filename if any, and if last line was from	1185	/* print filename if any, and if last line was from
897	* different file */	1186	* different file */
898	if (!opt_nofilename && lastprinted != current && current->desc[0])	1187	if (lastprinted != current)
899	{	1188	{
900	char buf[1024]; /* HACK-5 */	1189	current->last = 0;
901	snprintf (buf, sizeof (buf), "[%s]", current->desc);	1190	if (!opt_nofilename && current->desc[0])
902	split_line (listlen - 1, buf, current->color);	1191	{
903	}	1192	insert_new_line (xstrdup ("["), current);
		1193	append_to_existing_line (xstrdup (current->desc), current);
		1194	append_to_existing_line (xstrdup ("]"), current);
		1195	}
		1196	}
904		1197
905	/* if we're dealing with partial lines, and the last	1198	/* if we're dealing with partial lines, and the last
906	* time we showed the line it wasn't finished ... */	1199	* time we showed the line it wasn't finished ... */
907	if (!opt_whole && current->lastpartial)	1200	if (!opt_whole && current->lastpartial)
908	{	1201	{
909	/* if this is the same file we showed last then	1202	/* if this is the same file we showed last then
910	append to the last line shown */	1203	append to the last line shown */
911	if (lastprinted == current)	1204	if (lastprinted == current)
912	append_line (listlen - 1, current->buf);	1205	append_to_existing_line (current->buf, current);
913	else	1206	else
914	{	1207	{
915	/* but if a different file has been shown in the	1208	/* but if a different file has been shown in the
916	* mean time, make a new line, starting with the	1209	* mean time, make a new line, starting with the
917	* continuation string */	1210	* continuation string */
918	split_line (listlen - 1, continuation, current->color);	1211	insert_new_line (current->buf, current);
919	append_line (listlen - 1, current->buf);	1212	current->last->wrapped_left = 1;
920	}	1213	}
921	}	1214	}
922	else	1215	else
923	/* otherwise just make a plain and simple new line */	1216	/* otherwise just make a plain and simple new line */
924	split_line (listlen - 1, current->buf, current->color);	1217	insert_new_line (current->buf, current);
925		1218
926	free (current->buf), current->buf = 0;	1219	current->buf = 0;
927	current->index = listlen - 1;
928	lastprinted = current;	1220	lastprinted = current;
929	}	1221	}
930	}	1222	}
931		1223
932	if (need_update)	1224	if (need_update)
…		…
1004	region = XCreateRegion ();	1296	region = XCreateRegion ();
1005	}	1297	}
1006	}	1298	}
1007	}	1299	}
1008		1300
1009
1010	int	1301	int
1011	main (int argc, char *argv[])	1302	main (int argc, char *argv[])
1012	{	1303	{
1013	int i;	1304	int i;
1014	int opt_daemonize = 0;	1305	int opt_daemonize = 0;
…		…
1016	#if HAS_REGEX	1307	#if HAS_REGEX
1017	char *transform = NULL;	1308	char *transform = NULL;
1018	#endif	1309	#endif
1019		1310
1020	setlocale (LC_CTYPE, ""); /* try to initialize the locale. */	1311	setlocale (LC_CTYPE, ""); /* try to initialize the locale. */
1021
1022	/* window needs to be initialized before colorlookups can be done */
1023	/* just a dummy to get the color lookups right */
1024	geom_mask = NoValue;
1025	InitWindow ();
1026		1312
1027	for (i = 1; i < argc; i++)	1313	for (i = 1; i < argc; i++)
1028	{	1314	{
1029	const char *arg = argv[i];	1315	const char *arg = argv[i];
1030		1316
…		…
1043	XParseGeometry (argv[++i], &win_x, &win_y, &width, &height);	1329	XParseGeometry (argv[++i], &win_x, &win_y, &width, &height);
1044	else if (!strcmp (arg, "-display"))	1330	else if (!strcmp (arg, "-display"))
1045	dispname = argv[++i];	1331	dispname = argv[++i];
1046	else if (!strcmp (arg, "-cont"))	1332	else if (!strcmp (arg, "-cont"))
1047	continuation = argv[++i];	1333	continuation = argv[++i];
		1334	else if (!strcmp (arg, "-cont-color"))
		1335	cont_color = argv[++i];
1048	else if (!strcmp (arg, "-font") || !strcmp (arg, "-fn"))	1336	else if (!strcmp (arg, "-font") || !strcmp (arg, "-fn"))
1049	fontname = argv[++i];	1337	fontname = argv[++i];
1050	#if HAS_REGEX	1338	#if HAS_REGEX
1051	else if (!strcmp (arg, "-t"))	1339	else if (!strcmp (arg, "-t"))
1052	{	1340	{
1053	transform = argv[++i];	1341	transform = argv[++i];
1054	transform_to = argv[++i];	1342	transform_to = argv[++i];
1055	printf("transform: '%s' to '%s'\n", transform, transform_to);	1343	printf ("transform: '%s' to '%s'\n", transform, transform_to);
1056	}	1344	}
1057	#endif	1345	#endif
1058	else if (!strcmp (arg, "-fork") || !strcmp (arg, "-f"))	1346	else if (!strcmp (arg, "-fork") || !strcmp (arg, "-f"))
1059	opt_daemonize = 1;	1347	opt_daemonize = 1;
1060	else if (!strcmp (arg, "-reload"))	1348	else if (!strcmp (arg, "-reload"))
1061	{	1349	{
1062	reload = atoi (argv[++i]);	1350	reload = atoi (argv[++i]);
1063	command = argv[++i];	1351	command = argv[++i];
1064	}	1352	}
		1353	else if (!strcmp (arg, "-windowed"))
		1354	opt_windowed = 1;
1065	else if (!strcmp (arg, "-shade"))	1355	else if (!strcmp (arg, "-shade"))
1066	opt_shade = 1;	1356	opt_shade = 1;
1067	else if (!strcmp (arg, "-outline"))	1357	else if (!strcmp (arg, "-outline"))
1068	opt_outline = 1;	1358	opt_outline = 1;
		1359	else if (!strcmp (arg, "-minspace"))
		1360	opt_minspace = 1;
1069	else if (!strcmp (arg, "-noflicker"))	1361	else if (!strcmp (arg, "-noflicker"))
1070	opt_noflicker = 1;	1362	opt_noflicker = 1;
1071	else if (!strcmp (arg, "-frame"))	1363	else if (!strcmp (arg, "-frame"))
1072	opt_frame = 1;	1364	opt_frame = 1;
1073	else if (!strcmp (arg, "-no-filename"))	1365	else if (!strcmp (arg, "-no-filename"))
…		…
1080	opt_partial = 1;	1372	opt_partial = 1;
1081	else if (!strcmp (arg, "-update"))	1373	else if (!strcmp (arg, "-update"))
1082	opt_update = opt_partial = 1;	1374	opt_update = opt_partial = 1;
1083	else if (!strcmp (arg, "-wordwrap"))	1375	else if (!strcmp (arg, "-wordwrap"))
1084	opt_wordwrap = 1;	1376	opt_wordwrap = 1;
		1377	else if (!strcmp (arg, "-justify"))
		1378	opt_justify = 1;
1085	else if (!strcmp (arg, "-color"))	1379	else if (!strcmp (arg, "-color"))
1086	def_color = argv[++i];	1380	def_color = argv[++i];
1087	else if (!strcmp (arg, "-noinitial"))	1381	else if (!strcmp (arg, "-noinitial"))
1088	opt_noinitial = 1;	1382	opt_noinitial = 1;
1089	else if (!strcmp (arg, "-id"))	1383	else if (!strcmp (arg, "-id"))
1090	root = atoi (argv[++i]);	1384	{
		1385	unsigned long id;
		1386
		1387	if (sscanf (argv[++i], "%li", &id) == 1 && id)
		1388	root = id;
		1389	}
1091	else if (!strcmp (arg, "-interval") || !strcmp (arg, "-i"))	1390	else if (!strcmp (arg, "-interval") || !strcmp (arg, "-i"))
1092	{	1391	{
1093	double iv = atof (argv[++i]);	1392	double iv = atof (argv[++i]);
1094		1393
1095	interval.tv_sec = (int) iv;	1394	interval.tv_sec = (int) iv;
…		…
1125	}	1424	}
1126		1425
1127	e = xmalloc (sizeof (struct logfile_entry));	1426	e = xmalloc (sizeof (struct logfile_entry));
1128	e->partial = 0;	1427	e->partial = 0;
1129	e->buf = 0;	1428	e->buf = 0;
1130	e->index = -1;
1131		1429
1132	if (arg[0] == '-' && arg[1] == '\0')	1430	if (arg[0] == '-' && arg[1] == '\0')
1133	{	1431	{
1134	if ((e->fp = fdopen (0, "r")) == NULL)	1432	if ((e->fp = fdopen (0, "r")) == NULL)
1135	perror ("fdopen"), exit (1);	1433	perror ("fdopen"), exit (1);
1136	if (fcntl (0, F_SETFL, O_NONBLOCK) < 0)	1434	if (fcntl (0, F_SETFL, O_NONBLOCK) < 0)
1137	perror ("fcntl"), exit (1);	1435	perror ("fcntl"), exit (1);
		1436
1138	e->fname = NULL;	1437	e->fname = NULL;
1139	e->inode = 0;	1438	e->inode = 0;
		1439	if (desc == arg)
1140	e->desc = xstrdup ("stdin");	1440	e->desc = xstrdup ("stdin");
		1441	else
		1442	e->desc = xstrdup (desc);
1141	}	1443	}
1142	else	1444	else
1143	{	1445	{
1144	int l;
1145
1146	e->fname = xstrdup (fname);	1446	e->fname = xstrdup (fname);
		1447
1147	if (openlog (e) == NULL)	1448	if (openlog (e) == NULL)
1148	perror (fname), exit (1);	1449	perror (fname), exit (1);
1149		1450
1150	e->desc = xstrdup (desc);	1451	e->desc = xstrdup (desc);
1151	}	1452	}
1152		1453
1153	e->color = GetColor (fcolor);	1454	e->colorname = fcolor;
1154	e->partial = 0;	1455	e->partial = 0;
		1456	e->fontname = fontname;
		1457	e->last = NULL;
1155	e->next = NULL;	1458	e->next = NULL;
1156		1459
1157	if (!loglist)	1460	if (!loglist)
1158	loglist = e;	1461	loglist = e;
1159	if (loglist_tail)	1462	if (loglist_tail)
1160	loglist_tail->next = e;	1463	loglist_tail->next = e;
		1464
1161	loglist_tail = e;	1465	loglist_tail = e;
1162	}	1466	}
1163	}	1467	}
1164		1468
1165	if (!loglist)	1469	if (!loglist)
…		…
1167	fprintf (stderr, "You did not specify any files to tail\n"	1471	fprintf (stderr, "You did not specify any files to tail\n"
1168	"use %s --help for help\n", argv[0]);	1472	"use %s --help for help\n", argv[0]);
1169	exit (1);	1473	exit (1);
1170	}	1474	}
1171		1475
		1476	if (opt_update && opt_whole)
		1477	{
		1478	fprintf (stderr, "Specify at most one of -update and -whole\n");
		1479	exit (1);
		1480	}
1172	if (opt_partial && opt_whole)	1481	else if (opt_partial && opt_whole)
1173	{	1482	{
1174	fprintf (stderr, "Specify at most one of -partial and -whole\n");	1483	fprintf (stderr, "Specify at most one of -partial and -whole\n");
1175	exit (1);	1484	exit (1);
1176	}	1485	}
		1486
		1487	/* it doesn't make sense to justify if word wrap isn't on */
		1488	if (opt_justify)
		1489	opt_wordwrap = 1;
1177		1490
1178	/* HACK-7: do we want to allow both -shade and -outline? */	1491	/* HACK-7: do we want to allow both -shade and -outline? */
1179	if (opt_shade && opt_outline)	1492	if (opt_shade && opt_outline)
1180	{	1493	{
1181	fprintf (stderr, "Specify at most one of -shade and -outline\n");	1494	fprintf (stderr, "Specify at most one of -shade and -outline\n");
…		…
1192	#if HAS_REGEX	1505	#if HAS_REGEX
1193	if (transform)	1506	if (transform)
1194	{	1507	{
1195	int i;	1508	int i;
1196		1509
1197	printf("compiling regexp '%s'\n", transform);	1510	printf ("compiling regexp '%s'\n", transform);
1198	transformre = xmalloc (sizeof (regex_t));	1511	transformre = xmalloc (sizeof (regex_t));
1199	i = regcomp (transformre, transform, REG_EXTENDED);	1512	i = regcomp (transformre, transform, REG_EXTENDED);
1200	if (i != 0)	1513	if (i != 0)
1201	{	1514	{
1202	char buf[512];	1515	char buf[512];
1203		1516
1204	regerror (i, transformre, buf, sizeof (buf));	1517	regerror (i, transformre, buf, sizeof (buf));
1205	fprintf (stderr, "Cannot compile regular expression: %s\n", buf);	1518	fprintf (stderr, "Cannot compile regular expression: %s\n", buf);
1206	}	1519	}
1207	else	1520	else
1208	{
1209	printf("compiled '%s' OK to %x\n", transform, (int)transformre);	1521	printf ("compiled '%s' OK to %x\n", transform, (int)transformre);
1210	}
1211	}	1522	}
1212	#endif	1523	#endif
		1524
		1525	if (opt_outline && !opt_minspace)
		1526	{
		1527	/* adding outline increases the total width and height by 2
		1528	pixels each, and offsets the text one pixel right and one
		1529	pixel down */
		1530	effect_x_space = effect_y_space = 2;
		1531	effect_x_offset = effect_y_offset = 1;
		1532	}
		1533	else if (opt_shade && !opt_minspace)
		1534	{
		1535	/* adding a shadow increases the space used */
		1536	effect_x_space = abs (SHADE_X);
		1537	effect_y_space = abs (SHADE_Y);
		1538
		1539	/* if the shadow is to the right and below then we don't need
		1540	* to move the text to make space for it, but shadows to the left
		1541	* and above need accomodating */
		1542	effect_x_offset = SHADE_X > 0 ? 0 : -SHADE_X;
		1543	effect_y_offset = SHADE_Y > 0 ? 0 : -SHADE_Y;
		1544	}
		1545	else
		1546	{
		1547	effect_x_space = effect_y_space = 0;
		1548	effect_x_offset = effect_y_offset = 0;
		1549	}
1213		1550
1214	InitWindow ();	1551	InitWindow ();
1215		1552
1216	install_signal (SIGINT, blank_window);	1553	install_signal (SIGINT, blank_window);
1217	install_signal (SIGQUIT, blank_window);	1554	install_signal (SIGQUIT, blank_window);
…		…
1226	main_loop ();	1563	main_loop ();
1227		1564
1228	exit (1); /* to make gcc -Wall stop complaining */	1565	exit (1); /* to make gcc -Wall stop complaining */
1229	}	1566	}
1230		1567
1231	void	1568	static void
1232	install_signal (int sig, void (*handler) (int))	1569	install_signal (int sig, void (*handler) (int))
1233	{	1570	{
1234	struct sigaction action;	1571	struct sigaction action;
1235		1572
1236	action.sa_handler = handler;	1573	action.sa_handler = handler;
1237	sigemptyset (&action.sa_mask);	1574	sigemptyset (&action.sa_mask);
1238	action.sa_flags = SA_RESTART;	1575	action.sa_flags = SA_RESTART;
1239		1576
1240	if (sigaction (sig, &action, NULL) < 0)	1577	if (sigaction (sig, &action, NULL) < 0)
1241	fprintf (stderr, "sigaction(%d): %s\n", sig, strerror (errno)), exit (1);	1578	fprintf (stderr, "sigaction (%d): %s\n", sig, strerror (errno)), exit (1);
1242	}	1579	}
1243		1580
1244	void *	1581	static void *
1245	xstrdup (const char *string)	1582	xstrdup (const char *string)
1246	{	1583	{
1247	void *p;	1584	void *p;
1248		1585
1249	while ((p = strdup (string)) == NULL)	1586	while ((p = strdup (string)) == NULL)
1250	{	1587	{
1251	fprintf (stderr, "Memory exausted.");	1588	fprintf (stderr, "Memory exhausted in xstrdup ().\n");
1252	sleep (10);	1589	sleep (10);
1253	}	1590	}
1254		1591
1255	return p;	1592	return p;
1256	}	1593	}
1257		1594
1258	void *	1595	static void *
1259	xmalloc (size_t size)	1596	xmalloc (size_t size)
1260	{	1597	{
1261	void *p;	1598	void *p;
1262		1599
1263	while ((p = malloc (size)) == NULL)	1600	while ((p = malloc (size)) == NULL)
1264	{	1601	{
1265	fprintf (stderr, "Memory exausted.");	1602	fprintf (stderr, "Memory exhausted in xmalloc ().\n");
1266	sleep (10);	1603	sleep (10);
1267	}	1604	}
1268		1605
1269	return p;	1606	return p;
1270	}	1607	}
1271		1608
1272	void *	1609	static void *
1273	xrealloc (void *ptr, size_t size)	1610	xrealloc (void *ptr, size_t size)
1274	{	1611	{
1275	void *p;	1612	void *p;
1276		1613
1277	while ((p = realloc (ptr, size)) == NULL)	1614	while ((p = realloc (ptr, size)) == NULL)
1278	{	1615	{
1279	fprintf (stderr, "Memory exausted.");	1616	fprintf (stderr, "Memory exhausted in xrealloc ().\n");
1280	sleep (10);	1617	sleep (10);
1281	}	1618	}
1282		1619
1283	return p;	1620	return p;
1284	}	1621	}
1285		1622
1286	void	1623	static void
1287	display_help (char *myname)	1624	display_help (char *myname)
1288	{	1625	{
1289	printf ("Usage: %s [options] file1[,color[,desc]] "	1626	printf ("Usage: %s [options] file1[,color[,desc]]"
1290	"[file2[,color[,desc]] ...]\n", myname);	1627	"[options] [file2[,color[,desc]] ...]\n", myname);
1291	printf (" -g | -geometry geometry -g WIDTHxHEIGHT+X+Y\n"	1628	printf (" -g | -geometry geometry -g WIDTHxHEIGHT+X+Y\n"
1292	" -color color use color $color as default\n"	1629	" -color color use color $color as default\n"
1293	" -reload sec command reload after $sec and run command\n"	1630	" -reload sec command reload after $sec and run command\n"
1294	" -id id window id to use instead of the root window\n"	1631	" -id id window id to use instead of the root window\n"
		1632	" -windowed create a window instead of writing to the root\n"
1295	" -font FONTSPEC (-fn) font to use\n"	1633	" -font FONTSPEC (-fn) font to use\n"
1296	" -f | -fork fork into background\n"	1634	" -f | -fork fork into background\n"
1297	" -reverse print new lines at the top\n"	1635	" -reverse print new lines at the top\n"
1298	" -whole wait for \\n before showing a line\n"	1636	" -whole wait for \\n before showing a line\n"
1299	" -partial show lines even if they don't end with a \\n\n"	1637	" -partial show lines even if they don't end with a \\n\n"
1300	" -update allow updates to old partial lines\n"	1638	" -update allow updates to old partial lines\n"
1301	" -cont string to prefix continued partial lines with\n"	1639	" -cont string to prefix continued partial lines with\n"
		1640	" defaults to \"|| \"\n"
1302	" -wordwrap wrap long lines at spaces to avoid breaking words\n"	1641	" -wordwrap wrap long lines at spaces to avoid breaking words\n"
1303	" defaults to \"[+]\"\n"
1304	" -shade add shading to font\n"	1642	" -shade add shading to font\n"
		1643	" -outline add black outline to font\n"
		1644	" -minspace force minimum line spacing\n"
1305	" -noinitial don't display the last file lines on\n"	1645	" -noinitial don't display the last file lines on\n"
1306	" startup\n"	1646	" startup\n"
1307	" -i | -interval seconds interval between checks (fractional\n"	1647	" -i | -interval seconds interval between checks (fractional\n"
1308	" values o.k.). Default 2.4 seconds\n"	1648	" values o.k.). Default 2.4 seconds\n"
1309	" -V display version information and exit\n"	1649	" -V display version information and exit\n"
1310	"\n");	1650	"\n");
1311	printf ("Example:\n%s -g 80x25+100+50 -font fixed /var/log/messages,green "	1651	printf ("Example:\n%s -g 800x250+100+50 -font fixed /var/log/messages,green "
1312	"/var/log/secure,red,'ALERT'\n", myname);	1652	"/var/log/secure,red,'ALERT'\n", myname);
1313	exit (0);	1653	exit (0);
1314	}	1654	}
1315		1655
1316	void	1656	static void
1317	display_version (void)	1657	display_version (void)
1318	{	1658	{
1319	printf ("root-tail version " VERSION "\n");	1659	printf ("root-tail version " VERSION "\n");
1320	exit (0);	1660	exit (0);
1321	}	1661	}
1322		1662
1323	int	1663	static int
1324	daemonize (void)	1664	daemonize (void)
1325	{	1665	{
1326	pid_t pid;	1666	pid_t pid;
1327		1667
1328	switch (pid = fork ())	1668	switch (pid = fork ())
…		…
1330	case -1:	1670	case -1:
1331	return -1;	1671	return -1;
1332	case 0:	1672	case 0:
1333	break;	1673	break;
1334	default:	1674	default:
1335	/*printf("%d\n", pid);*/	1675	/*printf ("%d\n", pid);*/
1336	exit (0);	1676	exit (0);
1337	}	1677	}
1338		1678
1339	if (setsid () == -1)	1679	if (setsid () == -1)
1340	return -1;	1680	return -1;
1341		1681
1342	return 0;	1682	return 0;
1343	}	1683	}
		1684

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