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Comparing root-tail/root-tail.c (file contents):
Revision 1.26 by chris_moore, Sun Mar 28 21:53:09 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>
…		…
39		44
40	#if HAS_REGEX	45	#if HAS_REGEX
41	#include <regex.h>	46	#include <regex.h>
42	#endif	47	#endif
43		48
		49	#define SHADE_X 2
		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
		54
44	/* data structures */	55	/* data structures */
45	struct logfile_entry	56	struct logfile_entry
46	{	57	{
47	struct logfile_entry *next;	58	struct logfile_entry *next;
48		59
49	char *fname; /* name of file */	60	char *fname; /* name of file */
50	char *desc; /* alternative description */	61	char *desc; /* alternative description */
51	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;
52	FILE *fp; /* FILE struct associated with file */	67	FILE *fp; /* FILE struct associated with file */
53	ino_t inode; /* inode of the file opened */	68	ino_t inode; /* inode of the file opened */
54	off_t last_size; /* file size at the last check */	69	off_t last_size; /* file size at the last check */
55	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 */
56	int partial; /* true if the last line isn't complete */	72	int partial; /* true if the last line isn't complete */
57	int lastpartial; /* true if the previous output wasn't complete */	73	int lastpartial; /* true if the previous output wasn't complete */
58	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 */
59	};	76	};
60		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
61	struct linematrix	100	struct displaymatrix
62	{	101	{
63	char *line;	102	char *line;
64	int len;	103	int len;
		104	int offset;
		105	int buffer_size;
65	unsigned long color;	106	unsigned long color;
66	};	107	};
67		108
68	/* global variables */	109	/* global variables */
69	struct linematrix *lines;	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 */
70	int width = STD_WIDTH, height = STD_HEIGHT, listlen;	118	int width = STD_WIDTH, height = STD_HEIGHT, listlen = 50;
71	int win_x = LOC_X, win_y = LOC_Y;	119	int win_x = LOC_X, win_y = LOC_Y;
72	int font_ascent, 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 */
73	int do_reopen;	122	int do_reopen;
74	struct timeval interval = { 2, 400000 };	123	struct timeval interval = { 2, 400000 };
75	XFontSet fontset;
76		124
77	/* command line options */	125	/* command line options */
78	int opt_noinitial, opt_shade, opt_frame, opt_reverse, opt_nofilename,	126	int opt_noinitial, opt_shade, opt_frame, opt_reverse, opt_nofilename,
79	opt_outline, opt_noflicker, opt_whole, opt_update, opt_wordwrap,	127	opt_outline, opt_noflicker, opt_whole, opt_update, opt_wordwrap,
80	geom_mask, reload = 0;	128	opt_justify, geom_mask, opt_minspace, reload;
81	const char *command = NULL,	129	const char *command = NULL,
82	*fontname = USE_FONT, *dispname = NULL, *def_color = DEF_COLOR,	130	*fontname = USE_FONT, *dispname = NULL, *def_color = DEF_COLOR,
83	*continuation = "[+]";	131	*continuation = "|| ", *cont_color = DEF_CONT_COLOR;
84		132
85	struct logfile_entry *loglist = NULL, *loglist_tail = NULL;	133	struct logfile_entry *loglist = NULL, *loglist_tail = NULL;
86		134
87	Display *disp;	135	Display *disp;
88	Window root;	136	Window root;
…		…
104	/* prototypes */	152	/* prototypes */
105	void list_files (int);	153	void list_files (int);
106	void force_reopen (int);	154	void force_reopen (int);
107	void force_refresh (int);	155	void force_refresh (int);
108	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 */
109		160
110	void InitWindow (void);	161	void InitWindow (void);
111	unsigned long GetColor (const char *);	162	unsigned long GetColor (const char *);
112	void redraw (void);	163	void redraw (int);
113	void refresh (int, int, int);	164	void refresh (int, int, int, int);
114		165
115	void transform_line (char *s);	166	void transform_line (char *s);
116	int lineinput (struct logfile_entry *);	167	int lineinput (struct logfile_entry *);
117	void reopen (void);	168	void reopen (void);
118	void check_open_files (void);	169	void check_open_files (void);
…		…
122	void display_version (void);	173	void display_version (void);
123	void display_help (char *);	174	void display_help (char *);
124	void install_signal (int, void (*)(int));	175	void install_signal (int, void (*)(int));
125	void *xstrdup (const char *);	176	void *xstrdup (const char *);
126	void *xmalloc (size_t);	177	void *xmalloc (size_t);
		178	void *xrealloc (void *, size_t);
127	int daemonize (void);	179	int daemonize (void);
128		180
129	/* signal handlers */	181	/* signal handlers */
130	void	182	void
131	list_files (int dummy)	183	list_files (int dummy)
…		…
144	}	196	}
145		197
146	void	198	void
147	force_refresh (int dummy)	199	force_refresh (int dummy)
148	{	200	{
149	redraw ();	201	redraw (1);
150	}	202	}
151		203
152	void	204	void
153	blank_window (int dummy)	205	blank_window (int dummy)
154	{	206	{
155	XClearArea (disp, root, win_x - 2, win_y - 2, width + 5, height + 5, False);	207	XClearArea (disp, root, win_x, win_y, width + MARGIN_OF_ERROR, height, False);
156	XFlush (disp);	208	XFlush (disp);
157	exit (0);	209	exit (0);
158	}	210	}
159		211
160	/* X related functions */	212	/* X related functions */
…		…
173	fprintf (stderr, "can't allocate %s\n", ColorName);	225	fprintf (stderr, "can't allocate %s\n", ColorName);
174		226
175	return Color.pixel;	227	return Color.pixel;
176	}	228	}
177		229
		230	#ifndef USE_TOON_GET_ROOT_WINDOW
178	static Window	231	static void
179	root_window (Display * display, int screen_number)	232	find_root_window (Display *display, int screen_number)
180	{	233	{
		234	if (!root)
		235	{
181	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);
182	Window real_root_window = RootWindow (display, screen_number);	238	root = RootWindow (display, screen_number);
183		239
184	if (root) /* root window set via option */
185	return root;
186
187	if (SWM_VROOT != None)
188	{
189	Window unused, *windows;	240	Window unused, *windows = 0;
190	unsigned int count;	241	unsigned int count;
191		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	{
192	if (XQueryTree (display, real_root_window, &unused, &unused, &windows,	254	if (XQueryTree (display, *(Window *)virtual_root_window, &unused, &unused, &windows, &count))
193	&count))	255	root = windows[count - 1];
		256
		257	XFree (virtual_root_window);
		258	}
		259	else if (XQueryTree (display, root, &unused, &unused, &windows, &count))
194	{	260	{
195	int i;	261	int i;
196		262
197	for (i = 0; i < count; i++)	263	for (i = 0; i < count; i++)
198	{	264	{
199	Atom type;
200	int format;
201	unsigned long nitems, bytes_after_return;
202	unsigned char *virtual_root_window;
203
204	if (XGetWindowProperty (display, windows[i], SWM_VROOT,	265	if (XGetWindowProperty (display, windows[i], SWM_VROOT,
205	0, 1, False, XA_WINDOW, &type, &format,	266	0, 1, False, XA_WINDOW, &type, &format,
206	&nitems, &bytes_after_return,	267	&nitems, &bytes_after_return,
207	&virtual_root_window) == Success)	268	&virtual_root_window) == Success
		269	&& type == XA_WINDOW)
208	{	270	{
209	if (type != None)
210	{
211	if (type == XA_WINDOW)
212	{
213	XFree (windows);
214	return (Window) virtual_root_window;	271	root = *(Window *)virtual_root_window;
215	}	272	XFree (virtual_root_window);
216	else
217	fprintf (stderr,
218	"__SWM_VROOT property type mismatch");
219	}	273	break;
220	}	274	}
221	else	275	}
222	fprintf (stderr,
223	"failed to get __SWM_VROOT property on window 0x%lx",
224	windows[i]);
225	}
226		276
227	if (count)
228	XFree (windows);	277	XFree (windows);
229	}	278	}
230	else	279	else
231	fprintf (stderr, "Can't query tree on root window 0x%lx",	280	fprintf (stderr, "Can't query tree on root window 0x%lx", root);
232	real_root_window);
233	}	281	}
234	else
235	/* This shouldn't happen. The Xlib documentation is wrong BTW. */
236	fprintf (stderr, "Can't intern atom __SWM_VROOT");
237
238	return real_root_window;
239	}	282	}
		283	#endif /* USE_TOON_GET_ROOT_WINDOW */
240		284
241	void	285	void
242	InitWindow (void)	286	InitWindow (void)
243	{	287	{
244	XGCValues gcv;	288	XGCValues gcv;
245	unsigned long gcm;	289	unsigned long gcm;
246	int screen, ScreenWidth, ScreenHeight;	290	int screen, ScreenWidth, ScreenHeight;
		291	struct logfile_entry *e;
247		292
248	if (!(disp = XOpenDisplay (dispname)))	293	if (!(disp = XOpenDisplay (dispname)))
249	{	294	{
250	fprintf (stderr, "Can't open display %s.\n", dispname);	295	fprintf (stderr, "Can't open display %s.\n", dispname);
251	exit (1);	296	exit (1);
…		…
253		298
254	screen = DefaultScreen (disp);	299	screen = DefaultScreen (disp);
255	ScreenHeight = DisplayHeight (disp, screen);	300	ScreenHeight = DisplayHeight (disp, screen);
256	ScreenWidth = DisplayWidth (disp, screen);	301	ScreenWidth = DisplayWidth (disp, screen);
257		302
258	root = root_window (disp, screen);	303	find_root_window (disp, screen);
259		304
260	gcm = GCBackground;	305	gcm = GCBackground;
261	gcv.graphics_exposures = True;	306	gcv.graphics_exposures = True;
262	WinGC = XCreateGC (disp, root, gcm, &gcv);	307	WinGC = XCreateGC (disp, root, gcm, &gcv);
263	XMapWindow (disp, root);	308	XMapWindow (disp, root);
		309
264	XSetForeground (disp, WinGC, GetColor (DEF_COLOR));	310	XSetForeground (disp, WinGC, GetColor (DEF_COLOR));
265		311
		312	for (e = loglist; e; e = e->next)
266	{	313	{
267	char **missing_charset_list;	314	char **missing_charset_list;
268	int missing_charset_count;	315	int missing_charset_count;
269	char *def_string;	316	char *def_string;
270		317
271	fontset = XCreateFontSet (disp, fontname,	318	e->fontset = XCreateFontSet (disp, e->fontname,
272	&missing_charset_list, &missing_charset_count,	319	&missing_charset_list, &missing_charset_count,
273	&def_string);	320	&def_string);
274		321
275	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
276	{	336	{
277	fprintf (stderr,	337	XFontSetExtents *xfe = XExtentsOfFontSet (e->fontset);
278	"Missing charsets in String to FontSet conversion (%s)\n",	338
279	missing_charset_list[0]);	339	e->font_height = xfe->max_logical_extent.height;
280	XFreeStringList (missing_charset_list);	340	e->font_ascent = -xfe->max_logical_extent.y;
281	}	341	}
282	}
283		342
284	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	}
285	{	355	}
286	fprintf (stderr, "unable to create fontset, exiting.\n");
287	exit (1);
288	}
289
290	{
291	XFontSetExtents *xfe = XExtentsOfFontSet (fontset);
292
293	font_height = xfe->max_logical_extent.height;
294	font_ascent = -xfe->max_logical_extent.y;
295	}
296		356
297	if (geom_mask & XNegative)	357	if (geom_mask & XNegative)
298	win_x = win_x + ScreenWidth - width;	358	win_x = win_x + ScreenWidth - width;
299	if (geom_mask & YNegative)	359	if (geom_mask & YNegative)
300	win_y = win_y + ScreenHeight - height;	360	win_y = win_y + ScreenHeight - height;
301		361
302	listlen = height / font_height;
303
304	if (!listlen)
305	{	362	{
306	fprintf (stderr, "height too small for a single line, setting to %d\n",	363	struct logfile_entry *e;
307	font_height);	364
308	listlen = 1;	365	for (e = loglist; e; e = e->next)
		366	e->color = GetColor (e->colorname);
309	}	367	}
310
311	height = listlen * font_height;
312		368
313	XSelectInput (disp, root, ExposureMask | FocusChangeMask);	369	XSelectInput (disp, root, ExposureMask | FocusChangeMask);
314	}	370	}
315		371
316	/*	372	/*
317	* 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
318	* 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	*
319	* the rest is handled by regular refresh()'es	378	* the rest is handled by regular refresh ()'es
320	*/	379	*/
321	void	380	void
322	redraw (void)	381	redraw (int redraw_all)
323	{	382	{
324	XSetClipMask (disp, WinGC, None);	383	XSetClipMask (disp, WinGC, None);
325	refresh (0, 32768, 1);	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	}
326	}	416	}
327		417
328	/* Just redraw everything without clearing (i.e. after an EXPOSE event) */	418	/* Just redraw everything without clearing (i.e. after an EXPOSE event) */
329	void	419	void
330	refresh (int miny, int maxy, int clear)	420	refresh (int miny, int maxy, int clear, int refresh_all)
331	{	421	{
332	int lin;	422	int lin = 0;
333	int offset = (listlen + 1) * font_height;	423	int space = height;
		424	int offset;
334	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;
335		429
336	miny -= win_y + font_height;	430	if (opt_reverse)
337	maxy -= win_y - font_height;	431	offset = effect_y_offset;
		432	else
		433	offset = height + effect_y_offset;
		434
		435	miny -= win_y;
		436	maxy -= win_y;
338		437
339	if (clear && !opt_noflicker)	438	if (clear && !opt_noflicker)
340	XClearArea (disp, root, win_x, win_y, width, height, False);	439	XClearArea (disp, root, win_x, win_y, width + MARGIN_OF_ERROR, height, False);
341		440
342	for (lin = listlen; lin--;)	441	for (line = linelist; line; line = line->next, lin++)
343	{	442	{
344	struct linematrix *line = lines + (opt_reverse ? listlen - lin - 1 : lin);	443	struct displaymatrix *display_line;
345		444
346	offset -= font_height;	445	if (opt_noflicker && lin >= listlen)
347		446	{
348	if (offset < miny || offset > maxy)	447	int i = listlen;
349	continue;	448	listlen *= 1.5;
350		449	display = xrealloc(display, listlen * sizeof(struct displaymatrix));
351	if (clear && opt_noflicker)	450	for (; i < listlen; i++)
352	XClearArea (disp, root, win_x, win_y + offset - font_ascent, width, font_height, False);	451	{
353		452	display[i].line = xstrdup ("");
354	if (opt_outline)	453	display[i].len = 0;
		454	display[i].offset = 0;
		455	display[i].buffer_size = 0;
		456	}
355	{	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;
356	XSetForeground (disp, WinGC, black_color);	520	XSetForeground (disp, WinGC, black_color);
357	XmbDrawString (disp, root, fontset, WinGC, win_x - 1,	521
358	win_y + offset + 1, line->line, line->len);	522	for (x = -1; x <= 1; x += 2)
359	XmbDrawString (disp, root, fontset, WinGC, win_x + 1,	523	for (y = -1; y <= 1; y += 2)
360	win_y + offset + 1, line->line, line->len);	524	draw_text (disp, root, WinGC,
361	XmbDrawString (disp, root, fontset, WinGC, win_x - 1,	525	win_x + effect_x_offset + x,
362	win_y + offset - 1, line->line, line->len);	526	win_y + y + offset, line, foreground = 0);
363	XmbDrawString (disp, root, fontset, WinGC, win_x + 1,	527	}
364	win_y + offset - 1, line->line, line->len);
365	}
366	else if (opt_shade)	528	else if (opt_shade)
367	{	529	{
368	XSetForeground (disp, WinGC, black_color);	530	XSetForeground (disp, WinGC, black_color);
369	XmbDrawString (disp, root, fontset, WinGC, win_x + 2,	531	draw_text (disp, root, WinGC,
370	win_y + offset + 2, line->line, line->len);	532	win_x + effect_x_offset + SHADE_X,
371	}	533	win_y + offset + SHADE_Y, line, foreground = 0);
		534	}
372		535
373	XSetForeground (disp, WinGC, line->color);	536	XSetForeground (disp, WinGC, line->logfile->color);
374	XmbDrawString (disp, root, fontset, WinGC, win_x, win_y + offset,	537	draw_text (disp, root, WinGC,
375	line->line, line->len);	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);
376	}	584	}
377		585
378	if (opt_frame)	586	if (opt_frame)
379	{	587	{
380	XSetForeground (disp, WinGC, GetColor (def_color));	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 */
381	XDrawRectangle (disp, root, WinGC, win_x - 2, win_y - 2, width + 4, height + 4);	592	XDrawRectangle (disp, root, WinGC, win_x - 0, win_y - 0, width - 1, height - 1);
382	}	593	}
383	}	594	}
384		595
385	#if HAS_REGEX	596	#if HAS_REGEX
386	void	597	void
…		…
402	regmatch_t matched[16];	613	regmatch_t matched[16];
403		614
404	i = regexec (transformre, s, 16, matched, 0);	615	i = regexec (transformre, s, 16, matched, 0);
405	if (i == 0)	616	if (i == 0)
406	{ /* matched */	617	{ /* matched */
407	int match_start = matched[0].rm_so;	618	int match_start = matched[0].rm_so;
408	int match_end = matched[0].rm_eo;	619	int match_end = matched[0].rm_eo;
409	int old_len = match_end - match_start;	620	int old_len = match_end - match_start;
410	int new_len = strlen(transform_to);	621	int new_len = strlen (transform_to);
411	int old_whole_len = strlen(s);	622	int old_whole_len = strlen (s);
		623
412	printf("regexp was matched by '%s' - replace with '%s'\n", s, transform_to);	624	printf ("regexp was matched by '%s' - replace with '%s'\n", s, transform_to);
413	printf("match is from %d to %d\n",	625	printf ("match is from %d to %d\n", match_start, match_end);
414	match_start, match_end);
415	if (new_len > old_len) {	626	if (new_len > old_len)
416	s = realloc(s, old_whole_len + new_len - old_len);	627	s = xrealloc (s, old_whole_len + new_len - old_len);
417	}	628
418	if (new_len != old_len) {	629	if (new_len != old_len)
		630	{
419	memcpy(s + match_end + new_len - old_len,	631	memcpy (s + match_end + new_len - old_len,
420	s + match_end,	632	s + match_end,
421	old_whole_len - match_end);	633	old_whole_len - match_end);
422	s[old_whole_len + new_len - old_len] = '\0';	634	s[old_whole_len + new_len - old_len] = '\0';
423	}	635	}
		636
424	memcpy(s + match_start,	637	memcpy (s + match_start,
425	transform_to,	638	transform_to,
426	new_len);	639	new_len);
427	printf("transformed to '%s'\n", s);	640	printf ("transformed to '%s'\n", s);
428	}	641	}
429	else	642	else
430	{
431	printf("regexp was not matched by '%s'\n", s);	643	printf ("regexp was not matched by '%s'\n", s);
432	}
433	}	644	}
434	}	645	}
435	#endif	646	#endif
436		647
		648	/*
		649	* appends p2 to the end of p1, if p1 is not null
		650	* otherwise allocates a new string and copies p2 to it
		651	*/
437	char *	652	char *
438	concat_line (const char *p1, const char *p2)	653	concat_line (char *p1, const char *p2)
439	{	654	{
440	int l1 = p1 ? strlen (p1) : 0;	655	int l1 = p1 ? strlen (p1) : 0;
441	int l2 = strlen (p2);	656	int l2 = strlen (p2);
442	char *r = xmalloc (l1 + l2 + 1);	657	char *r;
443		658
444	memcpy (r, p1, l1);	659	assert (p2);
		660
		661	if (p1)
		662	r = xrealloc(p1, l1 + l2 + 1);
		663	else
		664	r = xmalloc (l2 + 1);
		665
445	memcpy (r + l1, p2, l2);	666	memcpy (r + l1, p2, l2);
446	r[l1 + l2] = 0;	667	r[l1 + l2] = 0;
447		668
448	return r;	669	return r;
449	}	670	}
450		671
451	/*	672	/*
452	* This routine should read a single line, no matter how long.	673	* This routine can read a line of any length if it is called enough times.
453	*/	674	*/
454	int	675	int
455	lineinput (struct logfile_entry *logfile)	676	lineinput (struct logfile_entry *logfile)
456	{	677	{
457	char buff[1024], *p = buff;	678	char buff[1024], *p;
458	int ch;	679	int ch;
459	/* HACK this - to add on the length of any partial line which we will be appending to */	680	/* HACK-2: add on the length of any partial line which we will be appending to */
460	int ofs = logfile->buf ? strlen (logfile->buf) : 0;	681	int ofs = logfile->buf ? strlen (logfile->buf) : 0;
461		682
		683	/* this loop ensures that the whole line is read, even if it's
		684	* longer than the buffer. we need to do this because when --whole
		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 */
462	do	687	do
463	{	688	{
		689	p = buff;
		690	do
		691	{
464	ch = fgetc (logfile->fp);	692	ch = fgetc (logfile->fp);
465		693
466	if (ch == '\n' || ch == EOF)	694	if (ch == '\n' || ch == EOF)
467	break;	695	break;
468	else if (ch == '\r')	696	else if (ch == '\r')
469	continue; /* skip */	697	continue; /* skip */
470	else if (ch == '\t')	698	else if (ch == '\t')
471	{	699	{
472	do	700	do
473	{	701	{
474	*p++ = ' ';	702	*p++ = ' ';
		703	ofs++;
		704	}
		705	while (ofs & 7);
		706	}
		707	else
		708	{
		709	*p++ = ch;
475	ofs++;	710	ofs++;
476	}	711	}
477	while (ofs & 7);
478	}
479	else
480	{	712	}
481	*p++ = ch;
482	ofs++;
483	}
484	}
485	while (p < buff + (sizeof buff) - 8 - 1);	713	while (p < buff + (sizeof buff) - 8 - 1);
486		714
487	if (p == buff && ch == EOF)	715	if (p == buff && ch == EOF)
488	return 0;	716	return 0;
489		717
490	*p = 0;	718	*p = 0;
491		719
492	p = concat_line (logfile->buf, buff);	720	p = logfile->buf = concat_line (logfile->buf, buff);
493	free (logfile->buf); logfile->buf = p;	721	}
		722	while (ch != '\n' && ch != EOF);
494		723
495	logfile->lastpartial = logfile->partial;	724	logfile->lastpartial = logfile->partial;
496	/* there are 3 ways we could have exited the loop: reading '\n',	725	/* there are 3 ways we could have exited the loop: reading '\n',
497	* reaching EOF, or filling the buffer; the 2nd and 3rd of these	726	* reaching EOF, or filling the buffer; the 2nd and 3rd of these
498	* both result in a partial line */	727	* both result in a partial line */
499	logfile->partial = ch != '\n';	728	logfile->partial = ch != '\n';
500		729
501	if (logfile->partial && opt_whole)	730	if (logfile->partial && opt_whole)
502	return 0;	731	return 0;
503		732
504	#if HAS_REGEX	733	#if HAS_REGEX
505	transform_line (logfile->buf);	734	transform_line (logfile->buf);
…		…
533	else	762	else
534	file->inode = stats.st_ino;	763	file->inode = stats.st_ino;
535		764
536	if (opt_noinitial)	765	if (opt_noinitial)
537	fseek (file->fp, 0, SEEK_END);	766	fseek (file->fp, 0, SEEK_END);
538	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?
539	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);
540		771
541	file->last_size = stats.st_size;	772	file->last_size = stats.st_size;
542	return file->fp;	773	return file->fp;
543	}	774	}
544		775
…		…
577	sleep (1);	808	sleep (1);
578	if (e->fp)	809	if (e->fp)
579	fclose (e->fp);	810	fclose (e->fp);
580	if (openlog (e) == NULL)	811	if (openlog (e) == NULL)
581	continue;	812	continue;
		813	if (fstat (fileno (e->fp), &stats) < 0)
		814	continue;
582	}	815	}
583		816
584	/* HACK this - stats can be uninitialised here (if the file
585	* didn't exist when stat() was called, but was recreated during
586	* the sleep(1)) */
587	if (stats.st_ino != e->inode)	817	if (stats.st_ino != e->inode)
588	{ /* file renamed? */	818	{ /* file renamed? */
589	if (e->fp)	819	if (e->fp)
590	fclose (e->fp);	820	fclose (e->fp);
591	if (openlog (e) == NULL)	821	if (openlog (e) == NULL)
592	continue;	822	continue;
		823	if (fstat (fileno (e->fp), &stats) < 0)
		824	continue;
593	}	825	}
594		826
595	if (stats.st_size < e->last_size)	827	if (stats.st_size < e->last_size)
596	{ /* file truncated? */	828	{ /* file truncated? */
597	fseek (e->fp, 0, SEEK_SET);	829	fseek (e->fp, 0, SEEK_SET);
…		…
599	}	831	}
600	}	832	}
601	}	833	}
602		834
603	/*	835	/*
604	* insert a single physical line (that must be short enough to fit)	836	* insert a single node in the list of screen lines and return a
605	* at position "idx" by pushing up lines above it. the caller	837	* pointer to the new node.
606	* MUST then fill in lines[idx] with valid data.	838	* the caller MUST then fill in ret->line and ret->len with valid
		839	* data.
		840	*/
		841	static struct line_node *
		842	new_line_node (struct logfile_entry *log)
		843	{
		844	struct line_node *new = xmalloc (sizeof (struct line_node));
		845
		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.
607	*/	889	*/
608	static void	890	static void
609	insert_line (int idx)	891	possibly_split_long_line (struct logfile_entry *log)
610	{	892	{
611	int cur_line;	893	char *str = log->last->line;
612	struct logfile_entry *current;
613
614	free (lines[0].line);
615
616	for (cur_line = 0; cur_line < idx; cur_line++)
617	lines[cur_line] = lines[cur_line + 1];
618
619	for (current = loglist; current; current = current->next)
620	if (current->index <= idx)
621	current->index--;
622	}
623
624	/*
625	* remove a single physical line at position "idx" by moving the lines above it
626	* down and inserting a "~" line at the top.
627	*/
628	static void
629	delete_line (int idx)
630	{
631	int cur_line;
632	struct logfile_entry *current;
633
634	for (cur_line = idx; cur_line > 0; cur_line--)
635	lines[cur_line] = lines[cur_line - 1];
636
637	lines[0].line = strdup ("~");
638
639	for (current = loglist; current; current = current->next)
640	if (current->index >= 0 && current->index <= idx)
641	current->index++;
642	}
643
644	/*
645	* takes a logical log file line and splits it into multiple physical
646	* screen lines by splitting it whenever a part becomes too long.
647	* lal lines will be inserted at position "idx".
648	*/
649	static void
650	split_line (int idx, const char *str, unsigned long color)
651	{
652	int l = strlen (str);	894	int l = strlen (str);
653	const char *p = 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	}
654		916
655	do	917	do
656	{	918	{
657	const char *beg = p;	919	const char *beg = p;
		920	int start_w = log->last->wrapped_left ? continuation_width : 0;
		921	int w = start_w;
658	int w = 0, wrapped = 0;	922	int wrapped = 0;
659	const char *break_p = NULL;	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;
660		931
661	while (*p)	932	while (*p)
662	{	933	{
		934	int cw, len;
		935
663	/* find the length in bytes of the next multibyte character */	936	/* find the length in bytes of the next multibyte character */
664	int len = mblen (p, l);	937	len = mblen (p, l);
665	if (len <= 0)	938	if (len <= 0)
666	len = 1; /* ignore (don't skip) illegal character sequences */	939	len = 1; /* ignore (don't skip) illegal character sequences */
667		940
668	/* find the width in pixels of the next character */	941	/* find the width in pixels of the next character */
669	int cw = XmbTextEscapement (fontset, p, len);	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
670	if (cw + w >= width)	970	if (cw + w > width - effect_x_space)
671	{	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
672	wrapped = 1;	979	wrapped = 1;
673	break;	980	break;
674	}	981	}
675
676	if (opt_wordwrap && len == 1 && p[0] == ' ')
677	break_p = p;
678		982
679	w += cw;	983	w += cw;
680	p += len;	984	p += len;
681	l -= len;	985	l -= len;
682	}	986	}
683		987
684	/* if we're wrapping at spaces, and the line is long enough to	988	/* if we're wrapping at spaces, and the line is long enough to
685	* wrap, and we've seen a space already, and the space wasn't	989	* wrap, and we've seen a space already, and the space wasn't
686	* the first character on the line, then wrap at the space */	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 */
687	if (opt_wordwrap && wrapped && break_p && break_p != beg)	995	if (opt_wordwrap && break_p && break_p != beg)
688	{
689	l += p - break_p;
690	p = break_p;
691	}
692
693	{	996	{
694	char *s = xmalloc (p - beg + 1);	997	prefix_len = break_p - beg;
695	memcpy (s, beg, p - beg);	998	p = break_p;
696	s[p - beg] = 0;	999	w = width_at_break_p;
697	insert_line (idx);	1000
698	lines[idx].line = s;	1001	/* if breaking at a space, skip all adjacent spaces */
699	lines[idx].len = p - beg;	1002	while (*p == ' ')
700	lines[idx].color = color;	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	}
701	}	1014	}
		1015	else
		1016	prefix_len = p - beg;
702		1017
703	/* if we wrapped at a space, don't display the space */	1018	/* make a copy of the tail end of the string */
704	if (opt_wordwrap && wrapped && break_p && break_p != beg)	1019	p = xstrdup (p);
705	{	1020
706	l--;	1021	/* and reduce the size of the head of the string */
707	p++;	1022	log->last->line = xrealloc (log->last->line, prefix_len + 1);
708	}	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;
709	}	1048	}
710	while (l);	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);
711	}	1061	}
712		1062
713	/*	1063	/*
714	* append something to an existing physical line. this is done	1064	* append something to an existing physical line. this is done
715	* by deleting the file on-screen, concatenating the new data to it	1065	* by deleting the file on-screen, concatenating the new data to it
716	* and splitting it again.	1066	* and splitting it again.
717	*/	1067	*/
718	static void	1068	static void
719	append_line (int idx, const char *str)	1069	append_to_existing_line (char *str, struct logfile_entry *log)
720	{	1070	{
721	unsigned long color = lines[idx].color;	1071	char *old, *new;
722	char *old = lines[idx].line;	1072
		1073	assert(log);
		1074	assert(log->last);
		1075
		1076	old = log->last->line;
		1077	assert(old);
		1078
723	char *new = concat_line (old, str);	1079	new = concat_line (old, str);
724
725	free (old);	1080	free (str);
726		1081	log->last->line = new;
727	delete_line (idx);	1082	log->last->len = strlen (new);
728	split_line (idx, new, color);	1083	possibly_split_long_line (log);
729	}	1084	}
730		1085
731	static void	1086	static void
732	main_loop (void)	1087	main_loop (void)
733	{	1088	{
734	lines = xmalloc (sizeof (struct linematrix) * listlen);
735	int lin;	1089	int lin;
736	time_t lastreload;	1090	time_t lastreload;
737	Region region = XCreateRegion ();	1091	Region region = XCreateRegion ();
738	XEvent xev;	1092	XEvent xev;
739	struct logfile_entry *lastprinted = NULL;	1093	struct logfile_entry *lastprinted = NULL;
740	struct logfile_entry *current;	1094	struct logfile_entry *current;
741	int need_update = 1;	1095	int need_update = 1;
742		1096
		1097	display = xmalloc (sizeof (struct displaymatrix) * listlen);
		1098
743	lastreload = time (NULL);	1099	lastreload = time (NULL);
744		1100
745	/* Initialize linematrix */	1101	/* Initialize line_node */
746	for (lin = 0; lin < listlen; lin++)	1102	for (lin = 0; lin < listlen; lin++)
747	{	1103	{
		1104	struct line_node *e = xmalloc (sizeof (struct line_node));
		1105	e->line = xstrdup ("~");
		1106	e->len = 1;
		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;
		1113
		1114	if (!linelist)
		1115	linelist = e;
		1116	if (linelist_tail)
		1117	linelist_tail->next = e;
		1118	linelist_tail = e;
		1119
748	lines[lin].line = strdup ("~");	1120	display[lin].line = xstrdup ("");
749	lines[lin].len = 1;	1121	display[lin].len = 0;
750	lines[lin].color = GetColor (def_color);	1122	display[lin].offset = 0;
		1123	display[lin].buffer_size = 0;
751	}	1124	}
752		1125
753	for (;;)	1126	for (;;)
754	{	1127	{
755	/* read logs */	1128	/* read logs */
…		…
766	/* if we're trying to update old partial lines in	1139	/* if we're trying to update old partial lines in
767	* place, and the last time this file was updated the	1140	* place, and the last time this file was updated the
768	* output was partial, and that partial line is not	1141	* output was partial, and that partial line is not
769	* too close to the top of the screen, then update	1142	* too close to the top of the screen, then update
770	* that partial line */	1143	* that partial line */
771	if (opt_update && current->lastpartial && current->index >= 0)	1144	if (opt_update && current->lastpartial && current->last)
772	{	1145	{
773	int idx = current->index;
774	append_line (idx, current->buf);	1146	append_to_existing_line (current->buf, current);
775	current->index = idx;	1147	current->buf = 0;
776	free (current->buf), current->buf = 0;
777	continue;	1148	continue;
778	}	1149	}
779		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
780	/* print filename if any, and if last line was from	1159	/* print filename if any, and if last line was from
781	* different file */	1160	* different file */
782	if (!opt_nofilename && lastprinted != current && current->desc[0])	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)
783	{	1175	{
784	char buf[1024]; /* HACK */	1176	/* if this is the same file we showed last then
785	snprintf (buf, sizeof (buf), "[%s]", current->desc);	1177	append to the last line shown */
786	split_line (listlen - 1, buf, current->color);	1178	if (lastprinted == current)
		1179	append_to_existing_line (current->buf, current);
		1180	else
		1181	{
		1182	/* but if a different file has been shown in the
		1183	* mean time, make a new line, starting with the
		1184	* continuation string */
		1185	insert_new_line (current->buf, current);
		1186	current->last->wrapped_left = 1;
		1187	}
787	}	1188	}
788
789	/* if this is the same file we showed last, and the
790	* last time we showed it, it wasn't finished, then
791	* append to the last line shown */
792	if (lastprinted == current && current->lastpartial)
793	append_line (listlen - 1, current->buf);
794	else if (current->lastpartial)
795	{
796	split_line (listlen - 1, continuation, current->color);
797	append_line (listlen - 1, current->buf);
798	}
799	else	1189	else
800	split_line (listlen - 1, current->buf, current->color);	1190	/* otherwise just make a plain and simple new line */
		1191	insert_new_line (current->buf, current);
801		1192
802	free (current->buf), current->buf = 0;	1193	current->buf = 0;
803	current->index = listlen - 1;
804	lastprinted = current;	1194	lastprinted = current;
805	}	1195	}
806	}	1196	}
807		1197
808	if (need_update)	1198	if (need_update)
809	{	1199	{
810	redraw ();	1200	redraw (0);
811	need_update = 0;	1201	need_update = 0;
812	}	1202	}
813	else	1203	else
814	{	1204	{
815	XFlush (disp);	1205	XFlush (disp);
…		…
872	XRectangle r;	1262	XRectangle r;
873		1263
874	XSetRegion (disp, WinGC, region);	1264	XSetRegion (disp, WinGC, region);
875	XClipBox (region, &r);	1265	XClipBox (region, &r);
876		1266
877	refresh (r.y, r.y + r.height, 0);	1267	refresh (r.y, r.y + r.height, 0, 1);
878		1268
879	XDestroyRegion (region);	1269	XDestroyRegion (region);
880	region = XCreateRegion ();	1270	region = XCreateRegion ();
881	}	1271	}
882	}	1272	}
…		…
892	#if HAS_REGEX	1282	#if HAS_REGEX
893	char *transform = NULL;	1283	char *transform = NULL;
894	#endif	1284	#endif
895		1285
896	setlocale (LC_CTYPE, ""); /* try to initialize the locale. */	1286	setlocale (LC_CTYPE, ""); /* try to initialize the locale. */
897
898	/* window needs to be initialized before colorlookups can be done */
899	/* just a dummy to get the color lookups right */
900	geom_mask = NoValue;
901	InitWindow ();
902		1287
903	for (i = 1; i < argc; i++)	1288	for (i = 1; i < argc; i++)
904	{	1289	{
905	const char *arg = argv[i];	1290	const char *arg = argv[i];
906		1291
…		…
919	XParseGeometry (argv[++i], &win_x, &win_y, &width, &height);	1304	XParseGeometry (argv[++i], &win_x, &win_y, &width, &height);
920	else if (!strcmp (arg, "-display"))	1305	else if (!strcmp (arg, "-display"))
921	dispname = argv[++i];	1306	dispname = argv[++i];
922	else if (!strcmp (arg, "-cont"))	1307	else if (!strcmp (arg, "-cont"))
923	continuation = argv[++i];	1308	continuation = argv[++i];
		1309	else if (!strcmp (arg, "-cont-color"))
		1310	cont_color = argv[++i];
924	else if (!strcmp (arg, "-font") || !strcmp (arg, "-fn"))	1311	else if (!strcmp (arg, "-font") || !strcmp (arg, "-fn"))
925	fontname = argv[++i];	1312	fontname = argv[++i];
926	#if HAS_REGEX	1313	#if HAS_REGEX
927	else if (!strcmp (arg, "-t"))	1314	else if (!strcmp (arg, "-t"))
928	{	1315	{
929	transform = argv[++i];	1316	transform = argv[++i];
930	transform_to = argv[++i];	1317	transform_to = argv[++i];
931	printf("transform: '%s' to '%s'\n", transform, transform_to);	1318	printf ("transform: '%s' to '%s'\n", transform, transform_to);
932	}	1319	}
933	#endif	1320	#endif
934	else if (!strcmp (arg, "-fork") || !strcmp (arg, "-f"))	1321	else if (!strcmp (arg, "-fork") || !strcmp (arg, "-f"))
935	opt_daemonize = 1;	1322	opt_daemonize = 1;
936	else if (!strcmp (arg, "-reload"))	1323	else if (!strcmp (arg, "-reload"))
937	{	1324	{
…		…
940	}	1327	}
941	else if (!strcmp (arg, "-shade"))	1328	else if (!strcmp (arg, "-shade"))
942	opt_shade = 1;	1329	opt_shade = 1;
943	else if (!strcmp (arg, "-outline"))	1330	else if (!strcmp (arg, "-outline"))
944	opt_outline = 1;	1331	opt_outline = 1;
		1332	else if (!strcmp (arg, "-minspace"))
		1333	opt_minspace = 1;
945	else if (!strcmp (arg, "-noflicker"))	1334	else if (!strcmp (arg, "-noflicker"))
946	opt_noflicker = 1;	1335	opt_noflicker = 1;
947	else if (!strcmp (arg, "-frame"))	1336	else if (!strcmp (arg, "-frame"))
948	opt_frame = 1;	1337	opt_frame = 1;
949	else if (!strcmp (arg, "-no-filename"))	1338	else if (!strcmp (arg, "-no-filename"))
…		…
956	opt_partial = 1;	1345	opt_partial = 1;
957	else if (!strcmp (arg, "-update"))	1346	else if (!strcmp (arg, "-update"))
958	opt_update = opt_partial = 1;	1347	opt_update = opt_partial = 1;
959	else if (!strcmp (arg, "-wordwrap"))	1348	else if (!strcmp (arg, "-wordwrap"))
960	opt_wordwrap = 1;	1349	opt_wordwrap = 1;
		1350	else if (!strcmp (arg, "-justify"))
		1351	opt_justify = 1;
961	else if (!strcmp (arg, "-color"))	1352	else if (!strcmp (arg, "-color"))
962	def_color = argv[++i];	1353	def_color = argv[++i];
963	else if (!strcmp (arg, "-noinitial"))	1354	else if (!strcmp (arg, "-noinitial"))
964	opt_noinitial = 1;	1355	opt_noinitial = 1;
965	else if (!strcmp (arg, "-id"))	1356	else if (!strcmp (arg, "-id"))
966	root = atoi (argv[++i]);	1357	{
		1358	unsigned long id;
		1359
		1360	if (sscanf (argv[++i], "%li", &id) == 1 && id)
		1361	root = id;
		1362	}
967	else if (!strcmp (arg, "-interval") || !strcmp (arg, "-i"))	1363	else if (!strcmp (arg, "-interval") || !strcmp (arg, "-i"))
968	{	1364	{
969	double iv = atof (argv[++i]);	1365	double iv = atof (argv[++i]);
970		1366
971	interval.tv_sec = (int) iv;	1367	interval.tv_sec = (int) iv;
…		…
1001	}	1397	}
1002		1398
1003	e = xmalloc (sizeof (struct logfile_entry));	1399	e = xmalloc (sizeof (struct logfile_entry));
1004	e->partial = 0;	1400	e->partial = 0;
1005	e->buf = 0;	1401	e->buf = 0;
1006	e->index = -1;
1007		1402
1008	if (arg[0] == '-' && arg[1] == '\0')	1403	if (arg[0] == '-' && arg[1] == '\0')
1009	{	1404	{
1010	if ((e->fp = fdopen (0, "r")) == NULL)	1405	if ((e->fp = fdopen (0, "r")) == NULL)
1011	perror ("fdopen"), exit (1);	1406	perror ("fdopen"), exit (1);
1012	if (fcntl (0, F_SETFL, O_NONBLOCK) < 0)	1407	if (fcntl (0, F_SETFL, O_NONBLOCK) < 0)
1013	perror ("fcntl"), exit (1);	1408	perror ("fcntl"), exit (1);
		1409
1014	e->fname = NULL;	1410	e->fname = NULL;
1015	e->inode = 0;	1411	e->inode = 0;
		1412	if (desc == arg)
1016	e->desc = xstrdup ("stdin");	1413	e->desc = xstrdup ("stdin");
		1414	else
		1415	e->desc = xstrdup (desc);
1017	}	1416	}
1018	else	1417	else
1019	{	1418	{
1020	int l;
1021
1022	e->fname = xstrdup (fname);	1419	e->fname = xstrdup (fname);
		1420
1023	if (openlog (e) == NULL)	1421	if (openlog (e) == NULL)
1024	perror (fname), exit (1);	1422	perror (fname), exit (1);
1025		1423
1026	l = strlen (desc);	1424	e->desc = xstrdup (desc);
1027	if (l > width - 2) /* must account for [ ] */
1028	l = width - 2;
1029	e->desc = xmalloc (l + 1);
1030	memcpy (e->desc, desc, l);
1031	*(e->desc + l) = '\0';
1032	}	1425	}
1033		1426
1034	e->color = GetColor (fcolor);	1427	e->colorname = fcolor;
1035	e->partial = 0;	1428	e->partial = 0;
		1429	e->fontname = fontname;
		1430	e->last = NULL;
1036	e->next = NULL;	1431	e->next = NULL;
1037		1432
1038	if (!loglist)	1433	if (!loglist)
1039	loglist = e;	1434	loglist = e;
1040	if (loglist_tail)	1435	if (loglist_tail)
1041	loglist_tail->next = e;	1436	loglist_tail->next = e;
		1437
1042	loglist_tail = e;	1438	loglist_tail = e;
1043	}	1439	}
1044	}	1440	}
1045		1441
1046	if (!loglist)	1442	if (!loglist)
…		…
1048	fprintf (stderr, "You did not specify any files to tail\n"	1444	fprintf (stderr, "You did not specify any files to tail\n"
1049	"use %s --help for help\n", argv[0]);	1445	"use %s --help for help\n", argv[0]);
1050	exit (1);	1446	exit (1);
1051	}	1447	}
1052		1448
		1449	if (opt_update && opt_whole)
		1450	{
		1451	fprintf (stderr, "Specify at most one of -update and -whole\n");
		1452	exit (1);
		1453	}
1053	if (opt_partial && opt_whole)	1454	else if (opt_partial && opt_whole)
1054	{	1455	{
1055	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");
1056	exit (1);	1468	exit (1);
1057	}	1469	}
1058		1470
1059	if (opt_partial)	1471	if (opt_partial)
1060	/* 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 */
1061	opt_whole = 0;	1473	opt_whole = 0;
1062	else if (file_count > 1)	1474	else if (file_count > 1)
1063	/* 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 */
1064	opt_whole = 1;	1476	opt_whole = 1;
1065		1477
1066	#if HAS_REGEX	1478	#if HAS_REGEX
1067	if (transform)	1479	if (transform)
1068	{	1480	{
1069	int i;	1481	int i;
1070		1482
1071	printf("compiling regexp '%s'\n", transform);	1483	printf ("compiling regexp '%s'\n", transform);
1072	transformre = xmalloc (sizeof (regex_t));	1484	transformre = xmalloc (sizeof (regex_t));
1073	i = regcomp (transformre, transform, REG_EXTENDED);	1485	i = regcomp (transformre, transform, REG_EXTENDED);
1074	if (i != 0)	1486	if (i != 0)
1075	{	1487	{
1076	char buf[512];	1488	char buf[512];
1077		1489
1078	regerror (i, transformre, buf, sizeof (buf));	1490	regerror (i, transformre, buf, sizeof (buf));
1079	fprintf (stderr, "Cannot compile regular expression: %s\n", buf);	1491	fprintf (stderr, "Cannot compile regular expression: %s\n", buf);
1080	}	1492	}
1081	else	1493	else
1082	{
1083	printf("compiled '%s' OK to %x\n", transform, (int)transformre);	1494	printf ("compiled '%s' OK to %x\n", transform, (int)transformre);
1084	}
1085	}	1495	}
1086	#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	}
1087		1523
1088	InitWindow ();	1524	InitWindow ();
1089		1525
1090	install_signal (SIGINT, blank_window);	1526	install_signal (SIGINT, blank_window);
1091	install_signal (SIGQUIT, blank_window);	1527	install_signal (SIGQUIT, blank_window);
…		…
1110	action.sa_handler = handler;	1546	action.sa_handler = handler;
1111	sigemptyset (&action.sa_mask);	1547	sigemptyset (&action.sa_mask);
1112	action.sa_flags = SA_RESTART;	1548	action.sa_flags = SA_RESTART;
1113		1549
1114	if (sigaction (sig, &action, NULL) < 0)	1550	if (sigaction (sig, &action, NULL) < 0)
1115	fprintf (stderr, "sigaction(%d): %s\n", sig, strerror (errno)), exit (1);	1551	fprintf (stderr, "sigaction (%d): %s\n", sig, strerror (errno)), exit (1);
1116	}	1552	}
1117		1553
1118	void *	1554	void *
1119	xstrdup (const char *string)	1555	xstrdup (const char *string)
1120	{	1556	{
1121	void *p;	1557	void *p;
1122		1558
1123	while ((p = strdup (string)) == NULL)	1559	while ((p = strdup (string)) == NULL)
1124	{	1560	{
1125	fprintf (stderr, "Memory exausted.");	1561	fprintf (stderr, "Memory exhausted in xstrdup ().\n");
1126	sleep (10);	1562	sleep (10);
1127	}	1563	}
1128		1564
1129	return p;	1565	return p;
1130	}	1566	}
…		…
1134	{	1570	{
1135	void *p;	1571	void *p;
1136		1572
1137	while ((p = malloc (size)) == NULL)	1573	while ((p = malloc (size)) == NULL)
1138	{	1574	{
1139	fprintf (stderr, "Memory exausted.");	1575	fprintf (stderr, "Memory exhausted in xmalloc ().\n");
		1576	sleep (10);
		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");
1140	sleep (10);	1590	sleep (10);
1141	}	1591	}
1142		1592
1143	return p;	1593	return p;
1144	}	1594	}
1145		1595
1146	void	1596	void
1147	display_help (char *myname)	1597	display_help (char *myname)
1148	{	1598	{
1149	printf ("Usage: %s [options] file1[,color[,desc]] "	1599	printf ("Usage: %s [options] file1[,color[,desc]]"
1150	"[file2[,color[,desc]] ...]\n", myname);	1600	"[options] [file2[,color[,desc]] ...]\n", myname);
1151	printf (" -g | -geometry geometry -g WIDTHxHEIGHT+X+Y\n"	1601	printf (" -g | -geometry geometry -g WIDTHxHEIGHT+X+Y\n"
1152	" -color color use color $color as default\n"	1602	" -color color use color $color as default\n"
1153	" -reload sec command reload after $sec and run command\n"	1603	" -reload sec command reload after $sec and run command\n"
1154	" -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"
1155	" -font FONTSPEC (-fn) font to use\n"	1605	" -font FONTSPEC (-fn) font to use\n"
…		…
1157	" -reverse print new lines at the top\n"	1607	" -reverse print new lines at the top\n"
1158	" -whole wait for \\n before showing a line\n"	1608	" -whole wait for \\n before showing a line\n"
1159	" -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"
1160	" -update allow updates to old partial lines\n"	1610	" -update allow updates to old partial lines\n"
1161	" -cont string to prefix continued partial lines with\n"	1611	" -cont string to prefix continued partial lines with\n"
		1612	" defaults to \"|| \"\n"
1162	" -wordwrap wrap long lines at spaces to avoid breaking words\n"	1613	" -wordwrap wrap long lines at spaces to avoid breaking words\n"
1163	" defaults to \"[+]\"\n"
1164	" -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"
1165	" -noinitial don't display the last file lines on\n"	1617	" -noinitial don't display the last file lines on\n"
1166	" startup\n"	1618	" startup\n"
1167	" -i | -interval seconds interval between checks (fractional\n"	1619	" -i | -interval seconds interval between checks (fractional\n"
1168	" values o.k.). Default 2.4 seconds\n"	1620	" values o.k.). Default 2.4 seconds\n"
1169	" -V display version information and exit\n"	1621	" -V display version information and exit\n"
1170	"\n");	1622	"\n");
1171	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 "
1172	"/var/log/secure,red,'ALERT'\n", myname);	1624	"/var/log/secure,red,'ALERT'\n", myname);
1173	exit (0);	1625	exit (0);
1174	}	1626	}
1175		1627
1176	void	1628	void
…		…
1190	case -1:	1642	case -1:
1191	return -1;	1643	return -1;
1192	case 0:	1644	case 0:
1193	break;	1645	break;
1194	default:	1646	default:
1195	printf("%d\n", pid);	1647	/*printf ("%d\n", pid);*/
1196	exit (0);	1648	exit (0);
1197	}	1649	}
1198		1650
1199	if (setsid () == -1)	1651	if (setsid () == -1)
1200	return -1;	1652	return -1;

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