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Comparing root-tail/root-tail.c (file contents):
Revision 1.11 by pcg, Fri Mar 26 13:14:54 2004 UTC vs.
Revision 1.63 by chris_moore, Thu Apr 15 00:38:13 2004 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
		4	* Marc Lehmann <pcg@goof.com>,
		5	* Chris Moore <chris.moore@mail.com>,
		6	* and many others, see README
3	*	7	*
4	* Original version by Mike Baker, then maintained by pcg@goof.com.	8	* Original version by Mike Baker.
5	*	9	*
6	* 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
7	* 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
8	* the Free Software Foundation; either version 2 of the License, or	12	* the Free Software Foundation; either version 2 of the License, or
9	* (at your option) any later version.	13	* (at your option) any later version.
…		…
17	* along with this program; if not, write to the Free Software	21	* along with this program; if not, write to the Free Software
18	* 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.
19	*/	23	*/
20		24
21	#include "config.h"	25	#include "config.h"
		26	#include <assert.h>
22	#include <stdlib.h>	27	#include <stdlib.h>
23	#include <stdio.h>	28	#include <stdio.h>
24	#include <unistd.h>	29	#include <unistd.h>
25	#include <string.h>	30	#include <string.h>
26	#include <signal.h>	31	#include <signal.h>
…		…
31	#include <sys/stat.h>	36	#include <sys/stat.h>
32	#include <sys/types.h>	37	#include <sys/types.h>
33	#include <locale.h>	38	#include <locale.h>
34	#include <ctype.h>	39	#include <ctype.h>
35	#include <stdarg.h>	40	#include <stdarg.h>
		41	#include <X11/Xlib.h>
		42	#include <X11/Xatom.h>
		43	#include <X11/Xutil.h>
		44
36	#if HAS_REGEX	45	#if HAS_REGEX
37	#include <regex.h>	46	#include <regex.h>
38	#endif	47	#endif
39	#include <X11/Xlib.h>	48
40	#include <X11/Xatom.h>	49	#define SHADE_X 2
41	#include <X11/Xutil.h>	50	#define SHADE_Y 2
		51
		52	/* some italic fonts still go over the margin - this margin of error cleans up the mess */
		53	#define MARGIN_OF_ERROR 2
42		54
43	/* data structures */	55	/* data structures */
44	struct logfile_entry	56	struct logfile_entry
45	{	57	{
46	struct logfile_entry *next;	58	struct logfile_entry *next;
47		59
48	char *fname; /* name of file */	60	char *fname; /* name of file */
49	char *desc; /* alternative description */	61	char *desc; /* alternative description */
50	char *buf; /* text read but not yet displayed */	62	char *buf; /* text read but not yet displayed */
		63	const char *fontname;
		64	XFontSet fontset;
		65	int font_height;
		66	int font_ascent;
51	FILE *fp; /* FILE struct associated with file */	67	FILE *fp; /* FILE struct associated with file */
52	ino_t inode; /* inode of the file opened */	68	ino_t inode; /* inode of the file opened */
53	off_t last_size; /* file size at the last check */	69	off_t last_size; /* file size at the last check */
54	unsigned long color; /* color to be used for printing */	70	unsigned long color; /* color to be used for printing */
		71	const char *colorname; /* color name/string */
55	int partial; /* true if the last line isn't complete */	72	int partial; /* true if the last line isn't complete */
56	int lastpartial; /* true if the previous output wasn't complete */	73	int lastpartial; /* true if the previous output wasn't complete */
57	int index; /* index into linematrix of a partial line */	74	struct line_node *last; /* last line we output */
		75	int modified; /* true if line is modified & needs displaying */
58	};	76	};
59		77
		78	struct line_node
		79	{
		80	struct line_node *next;
		81	struct line_node *prev;
		82	struct logfile_entry *logfile;
		83
		84	char *line; /* the text of the line (so far) */
		85	int len; /* the length of the line (in bytes) so far */
		86	int wrapped_left; /* true if wrapped from the previous line */
		87	int wrapped_right; /* true if wrapped to the next line */
		88	struct breakinfo *breaks; /* array of indicies to spaces if wrapped_right */
		89	int num_words; /* the number of words in the line */
		90	int free_pixels; /* the number of free pixels to spread out */
		91	};
		92
		93	struct breakinfo
		94	{
		95	int index; /* index into string of start of substring */
		96	int width; /* width in pixels of start of substring */
		97	int len; /* length of substring */
		98	};
		99
60	struct linematrix	100	struct displaymatrix
61	{	101	{
62	char *line;	102	char *line;
		103	int len;
		104	int offset;
		105	int buffer_size;
63	unsigned long color;	106	unsigned long color;
64	};	107	};
65		108
66	/* global variables */	109	/* global variables */
		110	struct line_node *linelist = NULL, *linelist_tail = NULL;
		111	struct displaymatrix *display;
		112	int continuation_width = -1;
		113	int continuation_color;
		114	int continuation_length;
		115
		116	/* HACK - ideally listlen will start at however many '~'s will fit on
		117	* the screen */
67	int width = STD_WIDTH, height = STD_HEIGHT, listlen;	118	int width = STD_WIDTH, height = STD_HEIGHT, listlen = 50;
68	int win_x = LOC_X, win_y = LOC_Y;	119	int win_x = LOC_X, win_y = LOC_Y;
69	int font_descent, font_height;	120	int effect_x_space, effect_y_space; /* how much space does shading / outlining take up */
		121	int effect_x_offset, effect_y_offset; /* and how does it offset the usable space */
70	int do_reopen;	122	int do_reopen;
71	struct timeval interval = { 3, 0 };	123	struct timeval interval = { 2, 400000 };
72	XFontSet fontset;
73		124
74	/* command line options */	125	/* command line options */
75	int opt_noinitial, opt_shade, opt_frame, opt_reverse, opt_nofilename,	126	int opt_noinitial, opt_shade, opt_frame, opt_reverse, opt_nofilename,
76	opt_whole, opt_update, geom_mask, reload = 0;	127	opt_outline, opt_noflicker, opt_whole, opt_update, opt_wordwrap,
		128	opt_justify, geom_mask, opt_minspace, reload;
77	const char *command = NULL,	129	const char *command = NULL,
78	*fontname = USE_FONT, *dispname = NULL, *def_color = DEF_COLOR,	130	*fontname = USE_FONT, *dispname = NULL, *def_color = DEF_COLOR,
79	*continuation = "[+]";	131	*continuation = "|| ", *cont_color = DEF_CONT_COLOR;
80		132
81	struct logfile_entry *loglist = NULL, *loglist_tail = NULL;	133	struct logfile_entry *loglist = NULL, *loglist_tail = NULL;
82		134
83	Display *disp;	135	Display *disp;
84	Window root;	136	Window root;
…		…
90	regex_t from;	142	regex_t from;
91	const char *to;	143	const char *to;
92	struct re_list *next;	144	struct re_list *next;
93	};	145	};
94	struct re_list *re_head, *re_tail;	146	struct re_list *re_head, *re_tail;
		147	char *transform_to = NULL;
		148	regex_t *transformre;
95	#endif	149	#endif
96		150
97		151
98	/* prototypes */	152	/* prototypes */
99	void list_files (int);	153	void list_files (int);
100	void force_reopen (int);	154	void force_reopen (int);
101	void force_refresh (int);	155	void force_refresh (int);
102	void blank_window (int);	156	void blank_window (int);
		157	#ifdef USE_TOON_GET_ROOT_WINDOW
		158	Window ToonGetRootWindow(Display *, int, Window *);
		159	#endif /* USE_TOON_GET_ROOT_WINDOW */
103		160
104	void InitWindow (void);	161	void InitWindow (void);
105	unsigned long GetColor (const char *);	162	unsigned long GetColor (const char *);
106	void redraw (void);	163	void redraw (int);
107	void refresh (struct linematrix *, int, int);	164	void refresh (int, int, int, int);
108		165
109	void transform_line (char *s);	166	void transform_line (char *s);
110	int lineinput (struct logfile_entry *);	167	int lineinput (struct logfile_entry *);
111	void reopen (void);	168	void reopen (void);
112	void check_open_files (void);	169	void check_open_files (void);
113	FILE *openlog (struct logfile_entry *);	170	FILE *openlog (struct logfile_entry *);
114	void main_loop (void);	171	static void main_loop (void);
115		172
116	void display_version (void);	173	void display_version (void);
117	void display_help (char *);	174	void display_help (char *);
118	void install_signal (int, void (*)(int));	175	void install_signal (int, void (*)(int));
119	void *xstrdup (const char *);	176	void *xstrdup (const char *);
120	void *xmalloc (size_t);	177	void *xmalloc (size_t);
		178	void *xrealloc (void *, size_t);
121	int daemonize (void);	179	int daemonize (void);
122		180
123	/* signal handlers */	181	/* signal handlers */
124	void	182	void
125	list_files (int dummy)	183	list_files (int dummy)
…		…
138	}	196	}
139		197
140	void	198	void
141	force_refresh (int dummy)	199	force_refresh (int dummy)
142	{	200	{
143	XClearArea (disp, root, win_x, win_y, width, height, False);
144	redraw ();	201	redraw (1);
145	}	202	}
146		203
147	void	204	void
148	blank_window (int dummy)	205	blank_window (int dummy)
149	{	206	{
150	XClearArea (disp, root, win_x, win_y, width, height, False);	207	XClearArea (disp, root, win_x, win_y, width + MARGIN_OF_ERROR, height, False);
151	XFlush (disp);	208	XFlush (disp);
152	exit (0);	209	exit (0);
153	}	210	}
154		211
155	/* X related functions */	212	/* X related functions */
…		…
168	fprintf (stderr, "can't allocate %s\n", ColorName);	225	fprintf (stderr, "can't allocate %s\n", ColorName);
169		226
170	return Color.pixel;	227	return Color.pixel;
171	}	228	}
172		229
		230	#ifndef USE_TOON_GET_ROOT_WINDOW
173	static Window	231	static void
174	root_window (Display * display, int screen_number)	232	find_root_window (Display *display, int screen_number)
175	{	233	{
		234	if (!root)
		235	{
176	Atom SWM_VROOT = XInternAtom (display, "__SWM_VROOT", False);	236	Atom SWM_VROOT = XInternAtom (display, "__SWM_VROOT", False);
		237	Atom NAUTILUS_DESKTOP_WINDOW_ID = XInternAtom (display, "NAUTILUS_DESKTOP_WINDOW_ID", False);
177	Window real_root_window = RootWindow (display, screen_number);	238	root = RootWindow (display, screen_number);
178		239
179	if (root) /* root window set via option */
180	return root;
181
182	if (SWM_VROOT != None)
183	{
184	Window unused, *windows;	240	Window unused, *windows = 0;
185	unsigned int count;	241	unsigned int count;
186		242
		243	Atom type;
		244	int format;
		245	unsigned long nitems, bytes_after_return;
		246	unsigned char *virtual_root_window;
		247
		248	if (XGetWindowProperty (display, root, NAUTILUS_DESKTOP_WINDOW_ID,
		249	0, 1, False, XA_WINDOW, &type, &format,
		250	&nitems, &bytes_after_return,
		251	&virtual_root_window) == Success
		252	&& type == XA_WINDOW)
		253	{
187	if (XQueryTree (display, real_root_window, &unused, &unused, &windows,	254	if (XQueryTree (display, *(Window *)virtual_root_window, &unused, &unused, &windows, &count))
188	&count))	255	root = windows[count - 1];
		256
		257	XFree (virtual_root_window);
		258	}
		259	else if (XQueryTree (display, root, &unused, &unused, &windows, &count))
189	{	260	{
190	int i;	261	int i;
191		262
192	for (i = 0; i < count; i++)	263	for (i = 0; i < count; i++)
193	{	264	{
194	Atom type;
195	int format;
196	unsigned long nitems, bytes_after_return;
197	unsigned char *virtual_root_window;
198
199	if (XGetWindowProperty (display, windows[i], SWM_VROOT,	265	if (XGetWindowProperty (display, windows[i], SWM_VROOT,
200	0, 1, False, XA_WINDOW, &type, &format,	266	0, 1, False, XA_WINDOW, &type, &format,
201	&nitems, &bytes_after_return,	267	&nitems, &bytes_after_return,
202	&virtual_root_window) == Success)	268	&virtual_root_window) == Success
		269	&& type == XA_WINDOW)
203	{	270	{
204	if (type != None)
205	{
206	if (type == XA_WINDOW)
207	{
208	XFree (windows);
209	return (Window) virtual_root_window;	271	root = *(Window *)virtual_root_window;
210	}	272	XFree (virtual_root_window);
211	else
212	fprintf (stderr,
213	"__SWM_VROOT property type mismatch");
214	}	273	break;
215	}	274	}
216	else	275	}
217	fprintf (stderr,
218	"failed to get __SWM_VROOT property on window 0x%lx",
219	windows[i]);
220	}
221		276
222	if (count)
223	XFree (windows);	277	XFree (windows);
224	}	278	}
225	else	279	else
226	fprintf (stderr, "Can't query tree on root window 0x%lx",	280	fprintf (stderr, "Can't query tree on root window 0x%lx", root);
227	real_root_window);
228	}	281	}
229	else
230	/* This shouldn't happen. The Xlib documentation is wrong BTW. */
231	fprintf (stderr, "Can't intern atom __SWM_VROOT");
232
233	return real_root_window;
234	}	282	}
		283	#endif /* USE_TOON_GET_ROOT_WINDOW */
235		284
236	void	285	void
237	InitWindow (void)	286	InitWindow (void)
238	{	287	{
239	XGCValues gcv;	288	XGCValues gcv;
240	unsigned long gcm;	289	unsigned long gcm;
241	int screen, ScreenWidth, ScreenHeight;	290	int screen, ScreenWidth, ScreenHeight;
		291	struct logfile_entry *e;
242		292
243	if (!(disp = XOpenDisplay (dispname)))	293	if (!(disp = XOpenDisplay (dispname)))
244	{	294	{
245	fprintf (stderr, "Can't open display %s.\n", dispname);	295	fprintf (stderr, "Can't open display %s.\n", dispname);
246	exit (1);	296	exit (1);
…		…
248		298
249	screen = DefaultScreen (disp);	299	screen = DefaultScreen (disp);
250	ScreenHeight = DisplayHeight (disp, screen);	300	ScreenHeight = DisplayHeight (disp, screen);
251	ScreenWidth = DisplayWidth (disp, screen);	301	ScreenWidth = DisplayWidth (disp, screen);
252		302
253	root = root_window (disp, screen);	303	find_root_window (disp, screen);
254		304
255	gcm = GCBackground;	305	gcm = GCBackground;
256	gcv.graphics_exposures = True;	306	gcv.graphics_exposures = True;
257	WinGC = XCreateGC (disp, root, gcm, &gcv);	307	WinGC = XCreateGC (disp, root, gcm, &gcv);
258	XMapWindow (disp, root);	308	XMapWindow (disp, root);
		309
259	XSetForeground (disp, WinGC, GetColor (DEF_COLOR));	310	XSetForeground (disp, WinGC, GetColor (DEF_COLOR));
260		311
		312	for (e = loglist; e; e = e->next)
261	{	313	{
262	char **missing_charset_list;	314	char **missing_charset_list;
263	int missing_charset_count;	315	int missing_charset_count;
264	char *def_string;	316	char *def_string;
265		317
266	fontset = XCreateFontSet (disp, fontname,	318	e->fontset = XCreateFontSet (disp, e->fontname,
267	&missing_charset_list, &missing_charset_count,	319	&missing_charset_list, &missing_charset_count,
268	&def_string);	320	&def_string);
269		321
270	if (missing_charset_count)	322	if (missing_charset_count)
		323	{
		324	fprintf (stderr,
		325	"Missing charsets in String to FontSet conversion (%s)\n",
		326	missing_charset_list[0]);
		327	XFreeStringList (missing_charset_list);
		328	}
		329
		330	if (!e->fontset)
		331	{
		332	fprintf (stderr, "unable to create fontset for font '%s', exiting.\n", e->fontname);
		333	exit (1);
		334	}
		335
271	{	336	{
272	fprintf (stderr,	337	XFontSetExtents *xfe = XExtentsOfFontSet (e->fontset);
273	"Missing charsets in String to FontSet conversion (%s)\n",	338
274	missing_charset_list[0]);	339	e->font_height = xfe->max_logical_extent.height;
275	XFreeStringList (missing_charset_list);	340	e->font_ascent = -xfe->max_logical_extent.y;
276	}	341	}
277	}
278		342
279	if (!fontset)	343	if (e->font_height > height - effect_y_space)
		344	{
		345	fprintf(stderr, "\n the display isn't tall enough to display a single line in font '%s'\n",
		346	e->fontname);
		347	fprintf(stderr, "\n the geometry in use is %d pixels tall\n", height);
		348	fprintf(stderr, "\n font '%s' is %d pixels tall\n", e->fontname, e->font_height);
		349	if (effect_y_space)
		350	fprintf(stderr, "\n the shade or outline options need an extra %d pixel%s of vertical space\n",
		351	effect_y_space, effect_y_space == 1 ? "" : "s");
		352	fprintf(stderr, "\n");
		353	exit(1);
		354	}
280	{	355	}
281	fprintf (stderr, "unable to create fontset, exiting.\n");
282	exit (1);
283	}
284
285	{
286	XFontSetExtents *xfe = XExtentsOfFontSet (fontset);
287
288	font_height = xfe->max_logical_extent.height;
289	font_descent = xfe->max_logical_extent.y;
290	}
291		356
292	if (geom_mask & XNegative)	357	if (geom_mask & XNegative)
293	win_x = win_x + ScreenWidth - width;	358	win_x = win_x + ScreenWidth - width;
294	if (geom_mask & YNegative)	359	if (geom_mask & YNegative)
295	win_y = win_y + ScreenHeight - height;	360	win_y = win_y + ScreenHeight - height;
296		361
297	listlen = height / font_height;
298
299	if (!listlen)
300	{	362	{
301	fprintf (stderr, "height too small for a single line, setting to %d\n",	363	struct logfile_entry *e;
302	font_height);	364
303	listlen = 1;	365	for (e = loglist; e; e = e->next)
		366	e->color = GetColor (e->colorname);
304	}	367	}
305
306	height = listlen * font_height;
307		368
308	XSelectInput (disp, root, ExposureMask | FocusChangeMask);	369	XSelectInput (disp, root, ExposureMask | FocusChangeMask);
309	}	370	}
310		371
311	char *
312	detabificate (char *s)
313	{
314	char *out;
315	int i, j;
316
317	out = malloc (8 * strlen (s) + 1);
318
319	for (i = 0, j = 0; s[i]; i++)
320	{
321	if (s[i] == '\t')
322	do
323	out[j++] = ' ';
324	while (j % 8);
325	else
326	out[j++] = s[i];
327	}
328
329	out[j] = '\0';
330	return out;
331	}
332
333	/*	372	/*
334	* redraw does a complete redraw, rather than an update (i.e. the area	373	* if redraw () is passwd a non-zero argument, it does a complete
335	* gets cleared first)	374	* redraw, rather than an update. if the argument is zero (and
		375	* -noflicker is in effect) then only the lines which have changed
		376	* since the last draw are redrawn.
		377	*
336	* the rest is handled by regular refresh()'es	378	* the rest is handled by regular refresh ()'es
337	*/	379	*/
338	void	380	void
339	redraw (void)	381	redraw (int redraw_all)
340	{	382	{
341	XClearArea (disp, root, win_x, win_y, width, height, True);	383	XSetClipMask (disp, WinGC, None);
		384	refresh (0, 32768, 1, redraw_all);
		385	}
		386
		387	void draw_text (Display *disp, Window root, GC WinGC, int x, int y, struct line_node *line, int foreground)
		388	{
		389	if (line->wrapped_right && opt_justify && line->breaks)
		390	{
		391	int i;
		392	for (i = 0; i < line->num_words; i++)
		393	XmbDrawString (disp, root, line->logfile->fontset, WinGC,
		394	x + line->breaks[i].width + ((i * line->free_pixels) / (line->num_words - 1))
		395	+ continuation_width * line->wrapped_left, y,
		396	line->line + line->breaks[i].index,
		397	line->breaks[i].len);
		398
		399	if (line->wrapped_left)
		400	{
		401	if (foreground) XSetForeground (disp, WinGC, continuation_color);
		402	XmbDrawString (disp, root, line->logfile->fontset, WinGC, x, y, continuation, continuation_length);
		403	}
		404	}
		405	else
		406	{
		407	XmbDrawString (disp, root, line->logfile->fontset, WinGC, x + continuation_width * line->wrapped_left,
		408	y, line->line, line->len);
		409
		410	if (line->wrapped_left)
		411	{
		412	if (foreground) XSetForeground (disp, WinGC, continuation_color);
		413	XmbDrawString (disp, root, line->logfile->fontset, WinGC, x, y, continuation, continuation_length);
		414	}
		415	}
342	}	416	}
343		417
344	/* Just redraw everything without clearing (i.e. after an EXPOSE event) */	418	/* Just redraw everything without clearing (i.e. after an EXPOSE event) */
345	void	419	void
346	refresh (struct linematrix *lines, int miny, int maxy)	420	refresh (int miny, int maxy, int clear, int refresh_all)
347	{	421	{
348	int lin;	422	int lin = 0;
349	int offset = (listlen + 1) * font_height;	423	int space = height;
		424	int offset;
350	unsigned long black_color = GetColor ("black");	425	unsigned long black_color = GetColor ("black");
		426	struct line_node *line;
		427	int step_per_line;
		428	int foreground = 0;
351		429
352	miny -= win_y + font_height;	430	if (opt_reverse)
353	maxy -= win_y - font_height;	431	offset = effect_y_offset;
		432	else
		433	offset = height + effect_y_offset;
354		434
355	for (lin = listlen; lin--;)	435	miny -= win_y;
356	{	436	maxy -= win_y;
357	struct linematrix *line =
358	lines + (opt_reverse ? listlen - lin - 1 : lin);
359		437
360	offset -= font_height;	438	if (clear && !opt_noflicker)
		439	XClearArea (disp, root, win_x, win_y, width + MARGIN_OF_ERROR, height, False);
361		440
362	if (offset < miny || offset > maxy)	441	for (line = linelist; line; line = line->next, lin++)
363	continue;	442	{
		443	struct displaymatrix *display_line;
364		444
365	if (opt_shade)	445	if (opt_noflicker && lin >= listlen)
		446	{
		447	int i = listlen;
		448	listlen *= 1.5;
		449	display = xrealloc(display, listlen * sizeof(struct displaymatrix));
		450	for (; i < listlen; i++)
		451	{
		452	display[i].line = xstrdup ("");
		453	display[i].len = 0;
		454	display[i].offset = 0;
		455	display[i].buffer_size = 0;
		456	}
366	{	457	}
		458
		459	display_line = display + lin;
		460
		461	step_per_line = line->logfile->font_height + effect_y_space;
		462	if (step_per_line > space)
		463	break;
		464
		465	if (!opt_reverse)
		466	offset -= step_per_line;
		467
		468	offset += line->logfile->font_ascent;
		469
		470	miny -= line->logfile->font_height;
		471	maxy += line->logfile->font_height;
		472
		473	if (offset >= miny && offset <= maxy)
		474	{
		475	/* if this line is a different than it was, then it
		476	* needs displaying */
		477	if (!opt_noflicker
		478	|| refresh_all
		479	|| display_line->len != line->len
		480	|| display_line->color != line->logfile->color
		481	|| display_line->offset != offset
		482	|| memcmp (display_line->line, line->line, line->len))
		483	{
		484	/* don't bother updating the record of what has been
		485	* displayed if -noflicker isn't in effect, since we redraw
		486	* the whole display every time anyway */
		487	if (opt_noflicker)
		488	{
		489	/* update the record of what has been displayed;
		490	* first make sure the buffer is big enough */
		491	if (display_line->buffer_size < line->len)
		492	{
		493	display_line->buffer_size = line->len;
		494	display_line->line = xrealloc (display_line->line, display_line->buffer_size);
		495	}
		496
		497	display_line->len = line->len;
		498	display_line->color = line->logfile->color;
		499	display_line->offset = offset;
		500	memcpy (display_line->line, line->line, line->len);
		501
		502	if (clear)
		503	{
		504	#ifdef DEBUG
		505	static int toggle;
		506	toggle = 1 - toggle;
		507	XSetForeground (disp, WinGC, toggle ? GetColor ("cyan") : GetColor ("yellow"));
		508	XFillRectangle (disp, root, WinGC, win_x, win_y + offset - line->logfile->font_ascent,
		509	width, step_per_line);
		510	#else /* DEBUG */
		511	XClearArea (disp, root, win_x, win_y + offset - line->logfile->font_ascent,
		512	width + MARGIN_OF_ERROR, step_per_line, False);
		513	#endif /* DEBUG */
		514	}
		515	}
		516
		517	if (opt_outline)
		518	{
		519	int x, y;
367	XSetForeground (disp, WinGC, black_color);	520	XSetForeground (disp, WinGC, black_color);
368	XmbDrawString (disp, root, fontset, WinGC, win_x + 2,
369	win_y + offset + 2, line->line, strlen (line->line));
370	}
371		521
		522	for (x = -1; x <= 1; x += 2)
		523	for (y = -1; y <= 1; y += 2)
		524	draw_text (disp, root, WinGC,
		525	win_x + effect_x_offset + x,
		526	win_y + y + offset, line, foreground = 0);
		527	}
		528	else if (opt_shade)
		529	{
		530	XSetForeground (disp, WinGC, black_color);
		531	draw_text (disp, root, WinGC,
		532	win_x + effect_x_offset + SHADE_X,
		533	win_y + offset + SHADE_Y, line, foreground = 0);
		534	}
		535
372	XSetForeground (disp, WinGC, line->color);	536	XSetForeground (disp, WinGC, line->logfile->color);
373	XmbDrawString (disp, root, fontset, WinGC, win_x, win_y + offset,	537	draw_text (disp, root, WinGC,
374	line->line, strlen (line->line));	538	win_x + effect_x_offset,
		539	win_y + offset, line, foreground = 1);
		540	}
		541	}
		542
		543	if (opt_reverse)
		544	offset += step_per_line;
		545	offset -= line->logfile->font_ascent;
		546
		547	miny += line->logfile->font_height;
		548	maxy -= line->logfile->font_height;
		549
		550	space -= step_per_line;
		551	}
		552
		553	if (space > 0 && clear)
		554	{
		555	#ifdef DEBUG
		556	XSetForeground (disp, WinGC, GetColor ("orange"));
		557	XFillRectangle (disp, root, WinGC, win_x, win_y + offset - (opt_reverse ? 0 : space),
		558	width, space);
		559	#else /* DEBUG */
		560	XClearArea (disp, root, win_x, win_y + offset - (opt_reverse ? 0 : space),
		561	width + MARGIN_OF_ERROR, space, False);
		562	#endif
		563	}
		564
		565	/* at least one of the lines must fit in the allocated area. we've
		566	* already checked at initialisation time that all the fonts are small
		567	* enough to fit at least one line in the display area, but assert it
		568	* again here to be sure */
		569	assert(line != linelist);
		570
		571	/* any lines that didn't just get looked at are never going to be, so break the chain */
		572	if (line) line->prev->next = 0;
		573
		574	/* and throw them all away */
		575	while (line)
		576	{
		577	struct line_node *this = line;
		578	line = line->next;
		579	if (this->logfile && this->logfile->last == this)
		580	this->logfile->last = NULL;
		581	free (this->line);
		582	free (this->breaks);
		583	free (this);
375	}	584	}
376		585
377	if (opt_frame)	586	if (opt_frame)
		587	{
		588	XSetForeground (disp, WinGC, GetColor (def_color));
		589	/* note that XDrawRectangle() draws a rectangle one pixel bigger
		590	* in both dimensions than you ask for, hence the subtractions.
		591	* XFillRectangle() doesn't suffer from this problem */
378	XDrawRectangle (disp, root, WinGC, win_x, win_y, width, height);	592	XDrawRectangle (disp, root, WinGC, win_x - 0, win_y - 0, width - 1, height - 1);
		593	}
379	}	594	}
380		595
381	#if HAS_REGEX	596	#if HAS_REGEX
382	void	597	void
383	transform_line (char *s)	598	transform_line (char *s)
…		…
395	if (transformre)	610	if (transformre)
396	{	611	{
397	int i;	612	int i;
398	regmatch_t matched[16];	613	regmatch_t matched[16];
399		614
400	i = regexec (&transformre, string, 16, matched, 0);	615	i = regexec (transformre, s, 16, matched, 0);
401	if (i == 0)	616	if (i == 0)
402	{ /* matched */	617	{ /* matched */
		618	int match_start = matched[0].rm_so;
		619	int match_end = matched[0].rm_eo;
		620	int old_len = match_end - match_start;
		621	int new_len = strlen (transform_to);
		622	int old_whole_len = strlen (s);
		623
		624	printf ("regexp was matched by '%s' - replace with '%s'\n", s, transform_to);
		625	printf ("match is from %d to %d\n", match_start, match_end);
		626	if (new_len > old_len)
		627	s = xrealloc (s, old_whole_len + new_len - old_len);
		628
		629	if (new_len != old_len)
		630	{
		631	memcpy (s + match_end + new_len - old_len,
		632	s + match_end,
		633	old_whole_len - match_end);
		634	s[old_whole_len + new_len - old_len] = '\0';
403	}	635	}
		636
		637	memcpy (s + match_start,
		638	transform_to,
		639	new_len);
		640	printf ("transformed to '%s'\n", s);
		641	}
		642	else
		643	printf ("regexp was not matched by '%s'\n", s);
404	}	644	}
405	}	645	}
406	#endif	646	#endif
407		647
408
409	/*	648	/*
410	* This routine should read 'width' characters and not more. However,	649	* appends p2 to the end of p1, if p1 is not null
411	* we really want to read width + 1 characters if the last char is a '\n',	650	* otherwise allocates a new string and copies p2 to it
412	* which we should remove afterwards. So, read width+1 chars and ungetc	651	*/
413	* the last character if it's not a newline. This means 'string' must be	652	char *
414	* width + 2 wide!	653	concat_line (char *p1, const char *p2)
		654	{
		655	int l1 = p1 ? strlen (p1) : 0;
		656	int l2 = strlen (p2);
		657	char *r;
		658
		659	assert (p2);
		660
		661	if (p1)
		662	r = xrealloc(p1, l1 + l2 + 1);
		663	else
		664	r = xmalloc (l2 + 1);
		665
		666	memcpy (r + l1, p2, l2);
		667	r[l1 + l2] = 0;
		668
		669	return r;
		670	}
		671
		672	/*
		673	* This routine can read a line of any length if it is called enough times.
415	*/	674	*/
416	int	675	int
417	lineinput (struct logfile_entry *logfile)	676	lineinput (struct logfile_entry *logfile)
418	{	677	{
419	char *string = logfile->buf;	678	char buff[1024], *p;
420	int slen = width + 2;	679	int ch;
421	FILE *f = logfile->fp;	680	/* HACK-2: add on the length of any partial line which we will be appending to */
		681	int ofs = logfile->buf ? strlen (logfile->buf) : 0;
422		682
423	int len = strlen (string);	683	/* this loop ensures that the whole line is read, even if it's
424	int partial = logfile->partial;	684	* longer than the buffer. we need to do this because when --whole
425		685	* is in effect we don't know whether to display the line or not
		686	* until we've seen how (ie. whether) it ends */
426	do	687	do
427	{	688	{
428	if (fgets (string + len, slen - len, f) == NULL) /* EOF or Error */	689	p = buff;
		690	do
		691	{
		692	ch = fgetc (logfile->fp);
		693
		694	if (ch == '\n' || ch == EOF)
		695	break;
		696	else if (ch == '\r')
		697	continue; /* skip */
		698	else if (ch == '\t')
		699	{
		700	do
		701	{
		702	*p++ = ' ';
		703	ofs++;
		704	}
		705	while (ofs & 7);
		706	}
		707	else
		708	{
		709	*p++ = ch;
		710	ofs++;
		711	}
		712	}
		713	while (p < buff + (sizeof buff) - 8 - 1);
		714
		715	if (p == buff && ch == EOF)
429	return 0;	716	return 0;
430		717
431	len = strlen (string);	718	*p = 0;
432	}
433	while (len == 0);
434		719
435	logfile->partial = 0;	720	p = logfile->buf = concat_line (logfile->buf, buff);
436
437	if (string[len - 1] == '\n')
438	/* if the string ends in a newline, delete the newline */
439	string[len - 1] = '\0'; /* erase newline */
440	else if (len >= slen - 1)
441	{	721	}
442	/* otherwise if we've read one too many characters, un-read the last one and delete it */	722	while (ch != '\n' && ch != EOF);
443	ungetc (string[len - 1], f);	723
444	string[len - 1] = '\0';	724	logfile->lastpartial = logfile->partial;
445	}	725	/* there are 3 ways we could have exited the loop: reading '\n',
446	else if (opt_whole)	726	* reaching EOF, or filling the buffer; the 2nd and 3rd of these
		727	* both result in a partial line */
		728	logfile->partial = ch != '\n';
		729
		730	if (logfile->partial && opt_whole)
447	return 0;	731	return 0;
448	else
449	logfile->partial = 1;
450		732
451	#if HAS_REGEX	733	#if HAS_REGEX
452	transform_line (string);	734	transform_line (logfile->buf);
453	#endif	735	#endif
454	logfile->lastpartial = partial;
455	return len;	736	return 1;
456	}	737	}
457		738
458	/* input: reads file->fname	739	/* input: reads file->fname
459	* output: fills file->fp, file->inode	740	* output: fills file->fp, file->inode
460	* returns file->fp	741	* returns file->fp
…		…
481	else	762	else
482	file->inode = stats.st_ino;	763	file->inode = stats.st_ino;
483		764
484	if (opt_noinitial)	765	if (opt_noinitial)
485	fseek (file->fp, 0, SEEK_END);	766	fseek (file->fp, 0, SEEK_END);
486	else if (stats.st_size > (listlen + 1) * width)	767	else /* if (stats.st_size > (listlen + 1) * width)
		768	* HACK - 'width' is in pixels - how are we to know how much text will fit?
487	fseek (file->fp, -((listlen + 2) * width), SEEK_END);	769	* fseek (file->fp, -((listlen + 2) * width/10), SEEK_END); */
		770	fseek (file->fp, -5000, SEEK_END);
488		771
489	file->last_size = stats.st_size;	772	file->last_size = stats.st_size;
490	return file->fp;	773	return file->fp;
491	}	774	}
492		775
…		…
524	{ /* file missing? */	807	{ /* file missing? */
525	sleep (1);	808	sleep (1);
526	if (e->fp)	809	if (e->fp)
527	fclose (e->fp);	810	fclose (e->fp);
528	if (openlog (e) == NULL)	811	if (openlog (e) == NULL)
529	break;	812	continue;
		813	if (fstat (fileno (e->fp), &stats) < 0)
		814	continue;
530	}	815	}
531		816
532	if (stats.st_ino != e->inode)	817	if (stats.st_ino != e->inode)
533	{ /* file renamed? */	818	{ /* file renamed? */
534	if (e->fp)	819	if (e->fp)
535	fclose (e->fp);	820	fclose (e->fp);
536	if (openlog (e) == NULL)	821	if (openlog (e) == NULL)
537	break;	822	continue;
		823	if (fstat (fileno (e->fp), &stats) < 0)
		824	continue;
538	}	825	}
539		826
540	if (stats.st_size < e->last_size)	827	if (stats.st_size < e->last_size)
541	{ /* file truncated? */	828	{ /* file truncated? */
542	fseek (e->fp, 0, SEEK_SET);	829	fseek (e->fp, 0, SEEK_SET);
543	e->last_size = stats.st_size;	830	e->last_size = stats.st_size;
544	}	831	}
545	}	832	}
546	}	833	}
547		834
548	#define SCROLL_UP(lines, listlen) \	835	/*
549	{ \	836	* insert a single node in the list of screen lines and return a
550	int cur_line; \	837	* pointer to the new node.
551	struct logfile_entry *current; \	838	* the caller MUST then fill in ret->line and ret->len with valid
552	for (cur_line = 0; cur_line < (listlen - 1); cur_line++) { \	839	* data.
553	strcpy(lines[cur_line].line, lines[cur_line + 1].line); \	840	*/
554	lines[cur_line].color = lines[cur_line + 1].color; \	841	static struct line_node *
555	} \	842	new_line_node (struct logfile_entry *log)
556	for (current = loglist; current; current = current->next) \	843	{
557	if (current->partial && current->index) \	844	struct line_node *new = xmalloc (sizeof (struct line_node));
558	current->index--; \
559	}
560		845
561	void	846	new->logfile = log;
		847	new->wrapped_left = 0;
		848	new->wrapped_right = 0;
		849	new->breaks = 0;
		850
		851	assert(log);
		852
		853	if (!log || !log->last)
		854	{
		855	new->next = linelist;
		856	new->next->prev = new;
		857
		858	new->prev = NULL;
		859	linelist = new;
		860	}
		861	else
		862	{
		863	/* 2 pointers from the new node */
		864	new->next = log->last;
		865	new->prev = log->last->prev;
		866
		867	/* 2 pointers back to the new node */
		868	if (new->next) new->next->prev = new;
		869	if (new->prev) new->prev->next = new;
		870
		871	/* if this is a new first entry in the list then update
		872	* 'linelist' */
		873	if (log->last == linelist)
		874	linelist = new;
		875	}
		876
		877	/* update the logfile record */
		878	if (log)
		879	log->last = new;
		880
		881	return new;
		882	}
		883
		884	/*
		885	* this is called after either adding a new line or appending to an
		886	* old one. in both cases it's possible that the line no longer fits,
		887	* and needs wrapping. this function checks the last line associated
		888	* with the supplied logfile.
		889	*/
		890	static void
		891	possibly_split_long_line (struct logfile_entry *log)
		892	{
		893	char *str = log->last->line;
		894	int l = strlen (str);
		895	char *p = str;
		896	struct line_node *line;
		897	int spaces;
		898	static struct breakinfo *breaks;
		899	static int break_buffer_size;
		900
		901	/* only calculate the continuation's width once */
		902	if (continuation_width == -1)
		903	{
		904	continuation_length = strlen (continuation);
		905	continuation_width = XmbTextEscapement (log->fontset, continuation, continuation_length);
		906	continuation_color = GetColor (cont_color);
		907
		908	/* make an array to store information about the location of
		909	* spaces in the line */
		910	if (opt_justify)
		911	{
		912	break_buffer_size = 32;
		913	breaks = xmalloc (break_buffer_size * sizeof (struct breakinfo));
		914	}
		915	}
		916
		917	do
		918	{
		919	const char *beg = p;
		920	int start_w = log->last->wrapped_left ? continuation_width : 0;
		921	int w = start_w;
		922	int wrapped = 0;
		923	char *break_p = NULL;
		924	int width_at_break_p = 0;
		925	int prefix_len;
		926
		927	spaces = 0;
		928
		929	if (opt_justify)
		930	breaks[spaces].index = breaks[spaces].width = 0;
		931
		932	while (*p)
		933	{
		934	int cw, len;
		935
		936	/* find the length in bytes of the next multibyte character */
		937	len = mblen (p, l);
		938	if (len <= 0)
		939	len = 1; /* ignore (don't skip) illegal character sequences */
		940
		941	/* find the width in pixels of the next character */
		942	cw = XmbTextEscapement (log->fontset, p, len);
		943	if (opt_wordwrap && len == 1 && p[0] == ' ' && p != break_p + 1)
		944	{
		945	break_p = p;
		946	width_at_break_p = w;
		947	spaces++;
		948
		949	if (opt_justify)
		950	{
		951	/* increase the size of the 'breaks' array when
		952	* necessary */
		953	if (spaces >= break_buffer_size)
		954	{
		955	break_buffer_size *= 1.5;
		956	breaks = xrealloc (breaks, break_buffer_size * sizeof (struct breakinfo));
		957	}
		958
		959	/* store information about (a) the location of each
		960	* space */
		961	breaks[spaces].index = p + 1 - beg;
		962	/* (b) the width (in pixels) of the string up to
		963	* this space */
		964	breaks[spaces].width = cw + w - start_w;
		965	/* (c) the length of each 'word' */
		966	breaks[spaces-1].len = breaks[spaces].index - breaks[spaces-1].index;
		967	}
		968	}
		969
		970	if (cw + w > width - effect_x_space)
		971	{
		972	if (p == beg)
		973	{
		974	fprintf (stderr, "we can't even fit a single character onto the line\n");
		975	if (len == 1) fprintf (stderr, "(the character we couldn't fit was '%c')\n", *p);
		976	exit (1);
		977	}
		978
		979	wrapped = 1;
		980	break;
		981	}
		982
		983	w += cw;
		984	p += len;
		985	l -= len;
		986	}
		987
		988	/* if we're wrapping at spaces, and the line is long enough to
		989	* wrap, and we've seen a space already, and the space wasn't
		990	* the first character on the line, then wrap at the space */
		991	if (!wrapped)
		992	break;
		993
		994	/* choose where to break the line */
		995	if (opt_wordwrap && break_p && break_p != beg)
		996	{
		997	prefix_len = break_p - beg;
		998	p = break_p;
		999	w = width_at_break_p;
		1000
		1001	/* if breaking at a space, skip all adjacent spaces */
		1002	while (*p == ' ')
		1003	{
		1004	int len = mblen (p, l);
		1005	if (len != 1) break;
		1006	p++;
		1007	}
		1008
		1009	if (opt_justify)
		1010	{
		1011	spaces--;
		1012	breaks[spaces].len--;
		1013	}
		1014	}
		1015	else
		1016	prefix_len = p - beg;
		1017
		1018	/* make a copy of the tail end of the string */
		1019	p = xstrdup (p);
		1020
		1021	/* and reduce the size of the head of the string */
		1022	log->last->line = xrealloc (log->last->line, prefix_len + 1);
		1023	log->last->len = prefix_len;
		1024	log->last->line[prefix_len] = '\0';
		1025
		1026	/* note that the head was wrapped on it's right */
		1027	log->last->wrapped_right = 1;
		1028
		1029	/* 'spaces' includes any space we broke on; we can only justify
		1030	* if there's at least one other space */
		1031	if (opt_justify && spaces &&
		1032	width - effect_x_space - width_at_break_p < spaces * log->font_height)
		1033	{
		1034	int i;
		1035	log->last->free_pixels = width - effect_x_space - w;
		1036	log->last->num_words = spaces + 1;
		1037	log->last->breaks = malloc (log->last->num_words * sizeof (struct breakinfo));
		1038	for (i = 0; i < log->last->num_words; i++)
		1039	log->last->breaks[i] = breaks[i];
		1040	}
		1041
		1042	line = new_line_node (log);
		1043	line->line = p;
		1044	l = line->len = strlen (p);
		1045
		1046	/* note that the tail end of the string is wrapped at its left */
		1047	line->wrapped_left = 1;
		1048	}
		1049	while (l);
		1050	}
		1051
		1052	static void
		1053	insert_new_line (char *str, struct logfile_entry *log)
		1054	{
		1055	struct line_node *new;
		1056	new = new_line_node (log);
		1057	new->line = str;
		1058	new->len = strlen (str);
		1059
		1060	possibly_split_long_line (log);
		1061	}
		1062
		1063	/*
		1064	* append something to an existing physical line. this is done
		1065	* by deleting the file on-screen, concatenating the new data to it
		1066	* and splitting it again.
		1067	*/
		1068	static void
		1069	append_to_existing_line (char *str, struct logfile_entry *log)
		1070	{
		1071	char *old, *new;
		1072
		1073	assert(log);
		1074	assert(log->last);
		1075
		1076	old = log->last->line;
		1077	assert(old);
		1078
		1079	new = concat_line (old, str);
		1080	free (str);
		1081	log->last->line = new;
		1082	log->last->len = strlen (new);
		1083	possibly_split_long_line (log);
		1084	}
		1085
		1086	static void
562	main_loop (void)	1087	main_loop (void)
563	{	1088	{
564	struct linematrix *lines = xmalloc (sizeof (struct linematrix) * listlen);	1089	int lin;
565	int lin, miny, maxy;
566	time_t lastreload;	1090	time_t lastreload;
567	Region region = XCreateRegion ();	1091	Region region = XCreateRegion ();
568	XEvent xev;	1092	XEvent xev;
569	struct logfile_entry *lastprinted = NULL;	1093	struct logfile_entry *lastprinted = NULL;
570	struct logfile_entry *current;	1094	struct logfile_entry *current;
		1095	int need_update = 1;
571		1096
572	maxy = 0;	1097	display = xmalloc (sizeof (struct displaymatrix) * listlen);
573	miny = win_y + height;	1098
574	lastreload = time (NULL);	1099	lastreload = time (NULL);
575		1100
576	/* Initialize linematrix */	1101	/* Initialize line_node */
577	for (lin = 0; lin < listlen; lin++)	1102	for (lin = 0; lin < listlen; lin++)
578	{	1103	{
579	lines[lin].line = xmalloc (width + 2);	1104	struct line_node *e = xmalloc (sizeof (struct line_node));
580	strcpy (lines[lin].line, "~");	1105	e->line = xstrdup ("~");
581	lines[lin].color = GetColor (def_color);	1106	e->len = 1;
582	}	1107	e->logfile = loglist; /* this is only needed to get a color for the '~' */
		1108	e->wrapped_left = 0;
		1109	e->wrapped_right = 0;
		1110	e->breaks = 0;
		1111	e->next = NULL;
		1112	e->prev = linelist_tail;
583		1113
584	/* show the display full of empty lines ("~") in case the first	1114	if (!linelist)
585	* time around the loop doesn't produce any output, as it won't if	1115	linelist = e;
586	* either (a) -noinitial is set or (b) all the files are currently	1116	if (linelist_tail)
587	* empty */	1117	linelist_tail->next = e;
588	redraw ();	1118	linelist_tail = e;
		1119
		1120	display[lin].line = xstrdup ("");
		1121	display[lin].len = 0;
		1122	display[lin].offset = 0;
		1123	display[lin].buffer_size = 0;
		1124	}
589		1125
590	for (;;)	1126	for (;;)
591	{	1127	{
592	int need_update = 0;
593
594	/* read logs */	1128	/* read logs */
595	for (current = loglist; current; current = current->next)	1129	for (current = loglist; current; current = current->next)
596	{	1130	{
597	if (!current->fp)	1131	if (!current->fp)
598	continue; /* skip missing files */	1132	continue; /* skip missing files */
599		1133
600	clearerr (current->fp);	1134	clearerr (current->fp);
601		1135
602	while (lineinput (current) != 0)	1136	while (lineinput (current))
603	{	1137	{
		1138	need_update = 1;
604	/* if we're trying to update old partial lines in	1139	/* if we're trying to update old partial lines in
605	* place, and the last time this file was updated the	1140	* place, and the last time this file was updated the
606	* output was partial, and that partial line is not	1141	* output was partial, and that partial line is not
607	* too close to the top of the screen, then update	1142	* too close to the top of the screen, then update
608	* that partial line */	1143	* that partial line */
609	if (opt_update && current->lastpartial && current->index >= 3)	1144	if (opt_update && current->lastpartial && current->last)
610	{	1145	{
611	int old_len = strlen (lines[current->index].line);	1146	append_to_existing_line (current->buf, current);
612	int new_len = strlen (current->buf);
613	int space_on_old_line = width / font_width - old_len; //D
614
615	strncat (lines[current->index].line, current->buf,
616	width - old_len);
617	/* if we can't fit the whole update into the old
618	* partial line then we're going to have to print
619	* the rest of it at the bottom on the screen */
620	if (new_len > space_on_old_line)
621	{
622	/* strcpy() doesn't like the strings to
623	* overlap in memory, but memmove() doesn't
624	* care */
625	memmove (current->buf,	1147	current->buf = 0;
626	current->buf + space_on_old_line,	1148	continue;
627	new_len - space_on_old_line + 1);
628	}	1149	}
		1150
		1151	/* if all we just read was a newline ending a line that we've already displayed, skip it */
		1152	if (current->buf[0] == '\0' && current->lastpartial)
		1153	{
		1154	free(current->buf);
		1155	current->buf = 0;
		1156	continue;
		1157	}
		1158
		1159	/* print filename if any, and if last line was from
		1160	* different file */
		1161	if (lastprinted != current)
		1162	{
		1163	current->last = 0;
		1164	if (!opt_nofilename && current->desc[0])
		1165	{
		1166	insert_new_line (xstrdup ("["), current);
		1167	append_to_existing_line (xstrdup (current->desc), current);
		1168	append_to_existing_line (xstrdup ("]"), current);
		1169	}
		1170	}
		1171
		1172	/* if we're dealing with partial lines, and the last
		1173	* time we showed the line it wasn't finished ... */
		1174	if (!opt_whole && current->lastpartial)
		1175	{
		1176	/* if this is the same file we showed last then
		1177	append to the last line shown */
		1178	if (lastprinted == current)
		1179	append_to_existing_line (current->buf, current);
629	else	1180	else
630	{	1181	{
631	need_update = 1;	1182	/* but if a different file has been shown in the
		1183	* mean time, make a new line, starting with the
		1184	* continuation string */
632	strcpy (current->buf, "");	1185	insert_new_line (current->buf, current);
633	continue;	1186	current->last->wrapped_left = 1;
634	}
635	}
636
637	/* print filename if any, and if last line was from
638	* different file */
639	if (!opt_nofilename &&
640	lastprinted != current && current->desc[0])
641	{
642	SCROLL_UP (lines, listlen);
643	sprintf (lines[listlen - 1].line, "[%s]", current->desc);
644	lines[listlen - 1].color = current->color;
645	}
646
647	/* if this is the same file we showed last, and the
648	* last time we showed it, it wasn't finished, then
649	* append to the last line shown */
650	if (lastprinted == current && current->lastpartial)
651	{
652	int old_len = strlen (lines[listlen - 1].line);
653	int new_len = strlen (current->buf);
654	strncat (lines[listlen - 1].line, current->buf,
655	width - old_len);
656	/* if it doesn't all fit, then put the part that
657	* doesn't fit on a new line */
658	if (new_len > width - old_len)
659	{
660	SCROLL_UP (lines, listlen);
661	strcpy (lines[listlen - 1].line,
662	current->buf + width - old_len);
663	}
664	/* show the 'continuation' string because we've got a
665	* continued partial line, but we weren't able to
666	* append it to the old displayed partial line */
667	}
668	else if (current->lastpartial)
669	{
670	int old_len = strlen (continuation);
671	int new_len = strlen (current->buf);
672	SCROLL_UP (lines, listlen);
673	strcpy (lines[listlen - 1].line, continuation);
674	strncat (lines[listlen - 1].line, current->buf,
675	width - old_len);
676	/* it might not fit, now that we've displayed the
677	* continuation string, so we may need to 'wrap' it */
678	if (new_len > width - old_len)
679	{
680	SCROLL_UP (lines, listlen);
681	strcpy (lines[listlen - 1].line,
682	current->buf + width - old_len);
683	}	1187	}
684	}	1188	}
685	else	1189	else
686	{	1190	/* otherwise just make a plain and simple new line */
687	SCROLL_UP (lines, listlen);	1191	insert_new_line (current->buf, current);
688	strcpy (lines[listlen - 1].line, current->buf);
689	}
690		1192
691	/* we've shown the line now. clear the buffer for the next line */
692	strcpy (current->buf, "");	1193	current->buf = 0;
693	current->index = listlen - 1;
694	lines[listlen - 1].color = current->color;
695
696	lastprinted = current;	1194	lastprinted = current;
697	need_update = 1;
698	}	1195	}
699	}	1196	}
700		1197
701	if (need_update)	1198	if (need_update)
		1199	{
702	redraw ();	1200	redraw (0);
		1201	need_update = 0;
		1202	}
703	else	1203	else
704	{	1204	{
705	XFlush (disp);	1205	XFlush (disp);
706		1206
707	if (!XPending (disp))	1207	if (!XPending (disp))
…		…
733		1233
734	r.x = xev.xexpose.x;	1234	r.x = xev.xexpose.x;
735	r.y = xev.xexpose.y;	1235	r.y = xev.xexpose.y;
736	r.width = xev.xexpose.width;	1236	r.width = xev.xexpose.width;
737	r.height = xev.xexpose.height;	1237	r.height = xev.xexpose.height;
		1238
738	XUnionRectWithRegion (&r, region, region);	1239	XUnionRectWithRegion (&r, region, region);
739	if (miny > r.y)
740	miny = r.y;
741	if (maxy < r.y + r.height)
742	maxy = r.y + r.height;
743	}	1240	}
744	break;	1241	break;
745	default:	1242	default:
746	#ifdef DEBUGMODE	1243	#ifdef DEBUGMODE
747	fprintf (stderr, "PANIC! Unknown event %d\n", xev.type);	1244	fprintf (stderr, "PANIC! Unknown event %d\n", xev.type);
…		…
760	lastreload = time (NULL);	1257	lastreload = time (NULL);
761	}	1258	}
762		1259
763	if (!XEmptyRegion (region))	1260	if (!XEmptyRegion (region))
764	{	1261	{
		1262	XRectangle r;
		1263
765	XSetRegion (disp, WinGC, region);	1264	XSetRegion (disp, WinGC, region);
		1265	XClipBox (region, &r);
766		1266
767	refresh (lines, miny, maxy);	1267	refresh (r.y, r.y + r.height, 0, 1);
		1268
768	XDestroyRegion (region);	1269	XDestroyRegion (region);
769	region = XCreateRegion ();	1270	region = XCreateRegion ();
770	maxy = 0;
771	miny = win_y + height;
772	}	1271	}
773	}	1272	}
774	}	1273	}
775		1274
776		1275
…		…
783	#if HAS_REGEX	1282	#if HAS_REGEX
784	char *transform = NULL;	1283	char *transform = NULL;
785	#endif	1284	#endif
786		1285
787	setlocale (LC_CTYPE, ""); /* try to initialize the locale. */	1286	setlocale (LC_CTYPE, ""); /* try to initialize the locale. */
788
789	/* window needs to be initialized before colorlookups can be done */
790	/* just a dummy to get the color lookups right */
791	geom_mask = NoValue;
792	InitWindow ();
793		1287
794	for (i = 1; i < argc; i++)	1288	for (i = 1; i < argc; i++)
795	{	1289	{
796	const char *arg = argv[i];	1290	const char *arg = argv[i];
797		1291
…		…
810	XParseGeometry (argv[++i], &win_x, &win_y, &width, &height);	1304	XParseGeometry (argv[++i], &win_x, &win_y, &width, &height);
811	else if (!strcmp (arg, "-display"))	1305	else if (!strcmp (arg, "-display"))
812	dispname = argv[++i];	1306	dispname = argv[++i];
813	else if (!strcmp (arg, "-cont"))	1307	else if (!strcmp (arg, "-cont"))
814	continuation = argv[++i];	1308	continuation = argv[++i];
		1309	else if (!strcmp (arg, "-cont-color"))
		1310	cont_color = argv[++i];
815	else if (!strcmp (arg, "-font") || !strcmp (arg, "-fn"))	1311	else if (!strcmp (arg, "-font") || !strcmp (arg, "-fn"))
816	fontname = argv[++i];	1312	fontname = argv[++i];
817	#if HAS_REGEX	1313	#if HAS_REGEX
818	else if (!strcmp (arg, "-t"))	1314	else if (!strcmp (arg, "-t"))
		1315	{
819	transform = argv[++i];	1316	transform = argv[++i];
		1317	transform_to = argv[++i];
		1318	printf ("transform: '%s' to '%s'\n", transform, transform_to);
		1319	}
820	#endif	1320	#endif
821	else if (!strcmp (arg, "-fork") || !strcmp (arg, "-f"))	1321	else if (!strcmp (arg, "-fork") || !strcmp (arg, "-f"))
822	opt_daemonize = 1;	1322	opt_daemonize = 1;
823	else if (!strcmp (arg, "-reload"))	1323	else if (!strcmp (arg, "-reload"))
824	{	1324	{
825	reload = atoi (argv[++i]);	1325	reload = atoi (argv[++i]);
826	command = argv[++i];	1326	command = argv[++i];
827	}	1327	}
828	else if (!strcmp (arg, "-shade"))	1328	else if (!strcmp (arg, "-shade"))
829	opt_shade = 1;	1329	opt_shade = 1;
		1330	else if (!strcmp (arg, "-outline"))
		1331	opt_outline = 1;
		1332	else if (!strcmp (arg, "-minspace"))
		1333	opt_minspace = 1;
		1334	else if (!strcmp (arg, "-noflicker"))
		1335	opt_noflicker = 1;
830	else if (!strcmp (arg, "-frame"))	1336	else if (!strcmp (arg, "-frame"))
831	opt_frame = 1;	1337	opt_frame = 1;
832	else if (!strcmp (arg, "-no-filename"))	1338	else if (!strcmp (arg, "-no-filename"))
833	opt_nofilename = 1;	1339	opt_nofilename = 1;
834	else if (!strcmp (arg, "-reverse"))	1340	else if (!strcmp (arg, "-reverse"))
…		…
837	opt_whole = 1;	1343	opt_whole = 1;
838	else if (!strcmp (arg, "-partial"))	1344	else if (!strcmp (arg, "-partial"))
839	opt_partial = 1;	1345	opt_partial = 1;
840	else if (!strcmp (arg, "-update"))	1346	else if (!strcmp (arg, "-update"))
841	opt_update = opt_partial = 1;	1347	opt_update = opt_partial = 1;
		1348	else if (!strcmp (arg, "-wordwrap"))
		1349	opt_wordwrap = 1;
		1350	else if (!strcmp (arg, "-justify"))
		1351	opt_justify = 1;
842	else if (!strcmp (arg, "-color"))	1352	else if (!strcmp (arg, "-color"))
843	def_color = argv[++i];	1353	def_color = argv[++i];
844	else if (!strcmp (arg, "-noinitial"))	1354	else if (!strcmp (arg, "-noinitial"))
845	opt_noinitial = 1;	1355	opt_noinitial = 1;
846	else if (!strcmp (arg, "-id"))	1356	else if (!strcmp (arg, "-id"))
847	root = atoi (argv[++i]);	1357	{
		1358	unsigned long id;
		1359
		1360	if (sscanf (argv[++i], "%li", &id) == 1 && id)
		1361	root = id;
		1362	}
848	else if (!strcmp (arg, "-interval") || !strcmp (arg, "-i"))	1363	else if (!strcmp (arg, "-interval") || !strcmp (arg, "-i"))
849	{	1364	{
850	double iv = atof (argv[++i]);	1365	double iv = atof (argv[++i]);
851		1366
852	interval.tv_sec = (int) iv;	1367	interval.tv_sec = (int) iv;
…		…
880	desc = p + 1;	1395	desc = p + 1;
881	}	1396	}
882	}	1397	}
883		1398
884	e = xmalloc (sizeof (struct logfile_entry));	1399	e = xmalloc (sizeof (struct logfile_entry));
		1400	e->partial = 0;
		1401	e->buf = 0;
		1402
885	if (arg[0] == '-' && arg[1] == '\0')	1403	if (arg[0] == '-' && arg[1] == '\0')
886	{	1404	{
887	if ((e->fp = fdopen (0, "r")) == NULL)	1405	if ((e->fp = fdopen (0, "r")) == NULL)
888	perror ("fdopen"), exit (1);	1406	perror ("fdopen"), exit (1);
889	if (fcntl (0, F_SETFL, O_NONBLOCK) < 0)	1407	if (fcntl (0, F_SETFL, O_NONBLOCK) < 0)
890	perror ("fcntl"), exit (1);	1408	perror ("fcntl"), exit (1);
		1409
891	e->fname = NULL;	1410	e->fname = NULL;
892	e->inode = 0;	1411	e->inode = 0;
		1412	if (desc == arg)
893	e->desc = xstrdup ("stdin");	1413	e->desc = xstrdup ("stdin");
		1414	else
		1415	e->desc = xstrdup (desc);
894	}	1416	}
895	else	1417	else
896	{	1418	{
897	int l;
898
899	e->fname = xstrdup (fname);	1419	e->fname = xstrdup (fname);
		1420
900	if (openlog (e) == NULL)	1421	if (openlog (e) == NULL)
901	perror (fname), exit (1);	1422	perror (fname), exit (1);
902		1423
903	l = strlen (desc);	1424	e->desc = xstrdup (desc);
904	if (l > width - 2) /* must account for [ ] */
905	l = width - 2;
906	e->desc = xmalloc (l + 1);
907	memcpy (e->desc, desc, l);
908	*(e->desc + l) = '\0';
909	}	1425	}
910		1426
911	e->color = GetColor (fcolor);	1427	e->colorname = fcolor;
912	e->buf = xmalloc (width + 2);
913	e->partial = 0;	1428	e->partial = 0;
914	e->buf[0] = '\0';	1429	e->fontname = fontname;
		1430	e->last = NULL;
915	e->next = NULL;	1431	e->next = NULL;
916		1432
917	if (!loglist)	1433	if (!loglist)
918	loglist = e;	1434	loglist = e;
919	if (loglist_tail)	1435	if (loglist_tail)
920	loglist_tail->next = e;	1436	loglist_tail->next = e;
		1437
921	loglist_tail = e;	1438	loglist_tail = e;
922	}	1439	}
923	}	1440	}
924		1441
925	if (!loglist)	1442	if (!loglist)
…		…
927	fprintf (stderr, "You did not specify any files to tail\n"	1444	fprintf (stderr, "You did not specify any files to tail\n"
928	"use %s --help for help\n", argv[0]);	1445	"use %s --help for help\n", argv[0]);
929	exit (1);	1446	exit (1);
930	}	1447	}
931		1448
		1449	if (opt_update && opt_whole)
		1450	{
		1451	fprintf (stderr, "Specify at most one of -update and -whole\n");
		1452	exit (1);
		1453	}
932	if (opt_partial && opt_whole)	1454	else if (opt_partial && opt_whole)
933	{	1455	{
934	fprintf (stderr, "Specify at most one of -partial and -whole\n");	1456	fprintf (stderr, "Specify at most one of -partial and -whole\n");
		1457	exit (1);
		1458	}
		1459
		1460	/* it doesn't make sense to justify if word wrap isn't on */
		1461	if (opt_justify)
		1462	opt_wordwrap = 1;
		1463
		1464	/* HACK-7: do we want to allow both -shade and -outline? */
		1465	if (opt_shade && opt_outline)
		1466	{
		1467	fprintf (stderr, "Specify at most one of -shade and -outline\n");
935	exit (1);	1468	exit (1);
936	}	1469	}
937		1470
938	if (opt_partial)	1471	if (opt_partial)
939	/* if we specifically requested to see partial lines then don't insist on whole lines */	1472	/* if we specifically requested to see partial lines then don't insist on whole lines */
940	opt_whole = 0;	1473	opt_whole = 0;
941	else if (file_count > 1)	1474	else if (file_count > 1)
942	/* otherwise, if we've viewing multiple files, default to showing whole lines */	1475	/* otherwise, if we're viewing multiple files, default to showing whole lines */
943	opt_whole = 1;	1476	opt_whole = 1;
944		1477
945	#if HAS_REGEX	1478	#if HAS_REGEX
946	if (transform)	1479	if (transform)
947	{	1480	{
948	int i;	1481	int i;
949		1482
		1483	printf ("compiling regexp '%s'\n", transform);
950	transformre = xmalloc (sizeof (transformre));	1484	transformre = xmalloc (sizeof (regex_t));
951	i = regcomp (&transformre, transform, REG_EXTENDED);	1485	i = regcomp (transformre, transform, REG_EXTENDED);
952	if (i != 0)	1486	if (i != 0)
953	{	1487	{
954	char buf[512];	1488	char buf[512];
955		1489
956	regerror (i, &transformre, buf, sizeof (buf));	1490	regerror (i, transformre, buf, sizeof (buf));
957	fprintf (stderr, "Cannot compile regular expression: %s\n", buf);	1491	fprintf (stderr, "Cannot compile regular expression: %s\n", buf);
958	}	1492	}
		1493	else
		1494	printf ("compiled '%s' OK to %x\n", transform, (int)transformre);
959	}	1495	}
960	#endif	1496	#endif
		1497
		1498	if (opt_outline && !opt_minspace)
		1499	{
		1500	/* adding outline increases the total width and height by 2
		1501	pixels each, and offsets the text one pixel right and one
		1502	pixel down */
		1503	effect_x_space = effect_y_space = 2;
		1504	effect_x_offset = effect_y_offset = 1;
		1505	}
		1506	else if (opt_shade && !opt_minspace)
		1507	{
		1508	/* adding a shadow increases the space used */
		1509	effect_x_space = abs (SHADE_X);
		1510	effect_y_space = abs (SHADE_Y);
		1511
		1512	/* if the shadow is to the right and below then we don't need
		1513	* to move the text to make space for it, but shadows to the left
		1514	* and above need accomodating */
		1515	effect_x_offset = SHADE_X > 0 ? 0 : -SHADE_X;
		1516	effect_y_offset = SHADE_Y > 0 ? 0 : -SHADE_Y;
		1517	}
		1518	else
		1519	{
		1520	effect_x_space = effect_y_space = 0;
		1521	effect_x_offset = effect_y_offset = 0;
		1522	}
961		1523
962	InitWindow ();	1524	InitWindow ();
963		1525
964	install_signal (SIGINT, blank_window);	1526	install_signal (SIGINT, blank_window);
965	install_signal (SIGQUIT, blank_window);	1527	install_signal (SIGQUIT, blank_window);
…		…
984	action.sa_handler = handler;	1546	action.sa_handler = handler;
985	sigemptyset (&action.sa_mask);	1547	sigemptyset (&action.sa_mask);
986	action.sa_flags = SA_RESTART;	1548	action.sa_flags = SA_RESTART;
987		1549
988	if (sigaction (sig, &action, NULL) < 0)	1550	if (sigaction (sig, &action, NULL) < 0)
989	fprintf (stderr, "sigaction(%d): %s\n", sig, strerror (errno)), exit (1);	1551	fprintf (stderr, "sigaction (%d): %s\n", sig, strerror (errno)), exit (1);
990	}	1552	}
991		1553
992	void *	1554	void *
993	xstrdup (const char *string)	1555	xstrdup (const char *string)
994	{	1556	{
995	void *p;	1557	void *p;
996		1558
997	while ((p = strdup (string)) == NULL)	1559	while ((p = strdup (string)) == NULL)
998	{	1560	{
999	fprintf (stderr, "Memory exausted.");	1561	fprintf (stderr, "Memory exhausted in xstrdup ().\n");
1000	sleep (10);	1562	sleep (10);
1001	}	1563	}
1002		1564
1003	return p;	1565	return p;
1004	}	1566	}
…		…
1008	{	1570	{
1009	void *p;	1571	void *p;
1010		1572
1011	while ((p = malloc (size)) == NULL)	1573	while ((p = malloc (size)) == NULL)
1012	{	1574	{
1013	fprintf (stderr, "Memory exausted.");	1575	fprintf (stderr, "Memory exhausted in xmalloc ().\n");
1014	sleep (10);	1576	sleep (10);
1015	}	1577	}
		1578
		1579	return p;
		1580	}
		1581
		1582	void *
		1583	xrealloc (void *ptr, size_t size)
		1584	{
		1585	void *p;
		1586
		1587	while ((p = realloc (ptr, size)) == NULL)
		1588	{
		1589	fprintf (stderr, "Memory exhausted in xrealloc ().\n");
		1590	sleep (10);
		1591	}
		1592
1016	return p;	1593	return p;
1017	}	1594	}
1018		1595
1019	void	1596	void
1020	display_help (char *myname)	1597	display_help (char *myname)
1021	{	1598	{
1022	printf ("Usage: %s [options] file1[,color[,desc]] "	1599	printf ("Usage: %s [options] file1[,color[,desc]]"
1023	"[file2[,color[,desc]] ...]\n", myname);	1600	"[options] [file2[,color[,desc]] ...]\n", myname);
1024	printf (" -g | -geometry geometry -g WIDTHxHEIGHT+X+Y\n"	1601	printf (" -g | -geometry geometry -g WIDTHxHEIGHT+X+Y\n"
1025	" -color color use color $color as default\n"	1602	" -color color use color $color as default\n"
1026	" -reload sec command reload after $sec and run command\n"	1603	" -reload sec command reload after $sec and run command\n"
1027	" -id id window id to use instead of the root window\n"	1604	" -id id window id to use instead of the root window\n"
1028	" -font FONTSPEC (-fn) font to use\n"	1605	" -font FONTSPEC (-fn) font to use\n"
…		…
1030	" -reverse print new lines at the top\n"	1607	" -reverse print new lines at the top\n"
1031	" -whole wait for \\n before showing a line\n"	1608	" -whole wait for \\n before showing a line\n"
1032	" -partial show lines even if they don't end with a \\n\n"	1609	" -partial show lines even if they don't end with a \\n\n"
1033	" -update allow updates to old partial lines\n"	1610	" -update allow updates to old partial lines\n"
1034	" -cont string to prefix continued partial lines with\n"	1611	" -cont string to prefix continued partial lines with\n"
1035	" defaults to \"[+]\"\n"	1612	" defaults to \"|| \"\n"
		1613	" -wordwrap wrap long lines at spaces to avoid breaking words\n"
1036	" -shade add shading to font\n"	1614	" -shade add shading to font\n"
		1615	" -outline add black outline to font\n"
		1616	" -minspace force minimum line spacing\n"
1037	" -noinitial don't display the last file lines on\n"	1617	" -noinitial don't display the last file lines on\n"
1038	" startup\n"	1618	" startup\n"
1039	" -i | -interval seconds interval between checks (fractional\n"	1619	" -i | -interval seconds interval between checks (fractional\n"
1040	" values o.k.). Default 3 seconds\n"	1620	" values o.k.). Default 2.4 seconds\n"
1041	" -V display version information and exit\n"	1621	" -V display version information and exit\n"
1042	"\n");	1622	"\n");
1043	printf ("Example:\n%s -g 80x25+100+50 -font fixed /var/log/messages,green "	1623	printf ("Example:\n%s -g 800x250+100+50 -font fixed /var/log/messages,green "
1044	"/var/log/secure,red,'ALERT'\n", myname);	1624	"/var/log/secure,red,'ALERT'\n", myname);
1045	exit (0);	1625	exit (0);
1046	}	1626	}
1047		1627
1048	void	1628	void
…		…
1053	}	1633	}
1054		1634
1055	int	1635	int
1056	daemonize (void)	1636	daemonize (void)
1057	{	1637	{
		1638	pid_t pid;
		1639
1058	switch (fork ())	1640	switch (pid = fork ())
1059	{	1641	{
1060	case -1:	1642	case -1:
1061	return -1;	1643	return -1;
1062	case 0:	1644	case 0:
1063	break;	1645	break;
1064	default:	1646	default:
		1647	/*printf ("%d\n", pid);*/
1065	_exit (0);	1648	exit (0);
1066	}	1649	}
1067		1650
1068	if (setsid () == -1)	1651	if (setsid () == -1)
1069	return -1;	1652	return -1;
1070		1653

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