[ViewVC] Diff of: cvs/root-tail/root-tail.c

Comparing root-tail/root-tail.c (file contents):
Revision 1.11 by pcg, Fri Mar 26 13:14:54 2004 UTC vs.
Revision 1.36 by pcg, Wed Mar 31 01:46:10 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	*	3	* Copyright 2000,2001,2002,2003,2004
4	* Original version by Mike Baker, then maintained by pcg@goof.com.	4	* Marc Lehmann <pcg@goof.com>,
		5	* and many others, see README
		6	*
		7	* Original version by Mike Baker.
5	*	8	*
6	* This program is free software; you can redistribute it and/or modify	9	* 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	10	* 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	11	* the Free Software Foundation; either version 2 of the License, or
9	* (at your option) any later version.	12	* (at your option) any later version.
31	#include <sys/stat.h>	34	#include <sys/stat.h>
32	#include <sys/types.h>	35	#include <sys/types.h>
33	#include <locale.h>	36	#include <locale.h>
34	#include <ctype.h>	37	#include <ctype.h>
35	#include <stdarg.h>	38	#include <stdarg.h>
		39	#include <X11/Xlib.h>
		40	#include <X11/Xatom.h>
		41	#include <X11/Xutil.h>
		42
36	#if HAS_REGEX	43	#if HAS_REGEX
37	#include <regex.h>	44	#include <regex.h>
38	#endif	45	#endif
39	#include <X11/Xlib.h>	46
40	#include <X11/Xatom.h>	47	#define SHADE_X 2
41	#include <X11/Xutil.h>	48	#define SHADE_Y 2
42		49
43	/* data structures */	50	/* data structures */
44	struct logfile_entry	51	struct logfile_entry
45	{	52	{
46	struct logfile_entry *next;	53	struct logfile_entry *next;
…		…
53	off_t last_size; /* file size at the last check */	60	off_t last_size; /* file size at the last check */
54	unsigned long color; /* color to be used for printing */	61	unsigned long color; /* color to be used for printing */
55	int partial; /* true if the last line isn't complete */	62	int partial; /* true if the last line isn't complete */
56	int lastpartial; /* true if the previous output wasn't complete */	63	int lastpartial; /* true if the previous output wasn't complete */
57	int index; /* index into linematrix of a partial line */	64	int index; /* index into linematrix of a partial line */
		65	int modified; /* true if line is modified & needs displaying */
58	};	66	};
59		67
60	struct linematrix	68	struct linematrix
61	{	69	{
62	char *line;	70	char *line;
		71	int len;
63	unsigned long color;	72	unsigned long color;
64	};	73	};
65		74
		75	struct displaymatrix
		76	{
		77	char *line;
		78	int len;
		79	int buffer_size;
		80	};
		81
66	/* global variables */	82	/* global variables */
		83	struct linematrix *lines;
		84	struct displaymatrix *display;
67	int width = STD_WIDTH, height = STD_HEIGHT, listlen;	85	int width = STD_WIDTH, height = STD_HEIGHT, listlen;
68	int win_x = LOC_X, win_y = LOC_Y;	86	int win_x = LOC_X, win_y = LOC_Y;
69	int font_descent, font_height;	87	int font_ascent, font_height;
		88	int effect_x_space, effect_y_space; /* how much space does shading / outlining take up */
		89	int effect_x_offset, effect_y_offset; /* and how does it offset the usable space */
70	int do_reopen;	90	int do_reopen;
71	struct timeval interval = { 3, 0 };	91	struct timeval interval = { 2, 400000 };
72	XFontSet fontset;	92	XFontSet fontset;
73		93
74	/* command line options */	94	/* command line options */
75	int opt_noinitial, opt_shade, opt_frame, opt_reverse, opt_nofilename,	95	int opt_noinitial, opt_shade, opt_frame, opt_reverse, opt_nofilename,
76	opt_whole, opt_update, geom_mask, reload = 0;	96	opt_outline, opt_noflicker, opt_whole, opt_update, opt_wordwrap,
		97	geom_mask, reload = 0;
77	const char *command = NULL,	98	const char *command = NULL,
78	fontname = USE_FONT, dispname = NULL, *def_color = DEF_COLOR,	99	fontname = USE_FONT, dispname = NULL, *def_color = DEF_COLOR,
79	*continuation = "[+]";	100	*continuation = "[+]";
80		101
81	struct logfile_entry loglist = NULL, loglist_tail = NULL;	102	struct logfile_entry loglist = NULL, loglist_tail = NULL;
…		…
90	regex_t from;	111	regex_t from;
91	const char *to;	112	const char *to;
92	struct re_list *next;	113	struct re_list *next;
93	};	114	};
94	struct re_list re_head, re_tail;	115	struct re_list re_head, re_tail;
		116	char *transform_to = NULL;
		117	regex_t *transformre;
95	#endif	118	#endif
96		119
97		120
98	/* prototypes */	121	/* prototypes */
99	void list_files (int);	122	void list_files (int);
…		…
101	void force_refresh (int);	124	void force_refresh (int);
102	void blank_window (int);	125	void blank_window (int);
103		126
104	void InitWindow (void);	127	void InitWindow (void);
105	unsigned long GetColor (const char *);	128	unsigned long GetColor (const char *);
106	void redraw (void);	129	void redraw (int);
107	void refresh (struct linematrix *, int, int);	130	void refresh (int, int, int, int);
108		131
109	void transform_line (char *s);	132	void transform_line (char *s);
110	int lineinput (struct logfile_entry *);	133	int lineinput (struct logfile_entry *);
111	void reopen (void);	134	void reopen (void);
112	void check_open_files (void);	135	void check_open_files (void);
113	FILE openlog (struct logfile_entry );	136	FILE openlog (struct logfile_entry );
114	void main_loop (void);	137	static void main_loop (void);
115		138
116	void display_version (void);	139	void display_version (void);
117	void display_help (char *);	140	void display_help (char *);
118	void install_signal (int, void (*)(int));	141	void install_signal (int, void (*)(int));
119	void xstrdup (const char );	142	void xstrdup (const char );
120	void *xmalloc (size_t);	143	void *xmalloc (size_t);
		144	void xrealloc (void , size_t);
121	int daemonize (void);	145	int daemonize (void);
122		146
123	/* signal handlers */	147	/* signal handlers */
124	void	148	void
125	list_files (int dummy)	149	list_files (int dummy)
…		…
138	}	162	}
139		163
140	void	164	void
141	force_refresh (int dummy)	165	force_refresh (int dummy)
142	{	166	{
143	XClearArea (disp, root, win_x, win_y, width, height, False);
144	redraw ();	167	redraw (1);
145	}	168	}
146		169
147	void	170	void
148	blank_window (int dummy)	171	blank_window (int dummy)
149	{	172	{
150	XClearArea (disp, root, win_x, win_y, width, height, False);	173	XClearArea (disp, root, win_x - 2, win_y - 2, width + 5, height + 5, False);
151	XFlush (disp);	174	XFlush (disp);
152	exit (0);	175	exit (0);
153	}	176	}
154		177
155	/* X related functions */	178	/* X related functions */
…		…
284		307
285	{	308	{
286	XFontSetExtents *xfe = XExtentsOfFontSet (fontset);	309	XFontSetExtents *xfe = XExtentsOfFontSet (fontset);
287		310
288	font_height = xfe->max_logical_extent.height;	311	font_height = xfe->max_logical_extent.height;
289	font_descent = xfe->max_logical_extent.y;	312	font_ascent = -xfe->max_logical_extent.y;
290	}	313	}
291		314
292	if (geom_mask & XNegative)	315	if (geom_mask & XNegative)
293	win_x = win_x + ScreenWidth - width;	316	win_x = win_x + ScreenWidth - width;
294	if (geom_mask & YNegative)	317	if (geom_mask & YNegative)
295	win_y = win_y + ScreenHeight - height;	318	win_y = win_y + ScreenHeight - height;
296		319
		320	if (opt_outline)
		321	{
		322	/* adding outline increases the total width and height by 2
		323	pixels each, and offsets the text one pixel right and one
		324	pixel down */
		325	effect_x_space = effect_y_space = 2;
		326	effect_x_offset = effect_y_offset = 1;
		327	}
		328	else if (opt_shade)
		329	{
		330	/* adding a shadow increases the space used */
		331	effect_x_space = abs(SHADE_X);
		332	effect_y_space = abs(SHADE_Y);
		333	/* if the shadow is to the right and below then we don't need
		334	* to move the text to make space for it, but shadows to the left
		335	* and above need accomodating */
		336	effect_x_offset = SHADE_X > 0 ? 0 : -SHADE_X;
		337	effect_y_offset = SHADE_Y > 0 ? 0 : -SHADE_Y;
		338	}
		339	else
		340	{
		341	effect_x_space = effect_y_space = 0;
		342	effect_x_offset = effect_y_offset = 0;
		343	}
		344
		345	/* if we are using -shade or -outline, there will be less usable
		346	* space for output */
297	listlen = height / font_height;	347	listlen = (height - effect_y_space) / font_height;
298		348
299	if (!listlen)	349	if (!listlen)
300	{	350	{
301	fprintf (stderr, "height too small for a single line, setting to %d\n",	351	fprintf (stderr, "height too small for a single line, setting to %d\n",
302	font_height);	352	font_height);
303	listlen = 1;	353	listlen = 1;
304	}	354	}
305		355
306	height = listlen * font_height;	356	/* leave the height how the user requested it. it might not all be
307		357	* used, but this will allow the geometry to be tuned more accurately
		358	* (with the -frame option)
		359	* the old code did this:
		360	* height = listlen * font_height + effect_y_space; */
		361
308	XSelectInput (disp, root, ExposureMask \| FocusChangeMask);	362	XSelectInput (disp, root, ExposureMask \| FocusChangeMask);
309	}	363	}
310		364
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	/*	365	/*
334	* redraw does a complete redraw, rather than an update (i.e. the area	366	* if redraw() is passwd a non-zero argument, it does a complete
335	* gets cleared first)	367	* redraw, rather than an update. if the argument is zero (and
		368	* -noflicker is in effect) then only the lines which have changed
		369	* since the last draw are redrawn.
		370	*
336	* the rest is handled by regular refresh()'es	371	* the rest is handled by regular refresh()'es
337	*/	372	*/
338	void	373	void
339	redraw (void)	374	redraw (int redraw_all)
340	{	375	{
341	XClearArea (disp, root, win_x, win_y, width, height, True);	376	XSetClipMask (disp, WinGC, None);
		377	refresh (0, 32768, 1, redraw_all);
342	}	378	}
343		379
344	/* Just redraw everything without clearing (i.e. after an EXPOSE event) */	380	/* Just redraw everything without clearing (i.e. after an EXPOSE event) */
345	void	381	void
346	refresh (struct linematrix *lines, int miny, int maxy)	382	refresh (int miny, int maxy, int clear, int refresh_all)
347	{	383	{
348	int lin;	384	int lin;
349	int offset = (listlen + 1) * font_height;	385	int offset = listlen * font_height + font_ascent + effect_y_offset;
350	unsigned long black_color = GetColor ("black");	386	unsigned long black_color = GetColor ("black");
351		387
352	miny -= win_y + font_height;	388	miny -= win_y + font_height;
353	maxy -= win_y - font_height;	389	maxy -= win_y - font_height;
354		390
		391	if (clear && !opt_noflicker)
		392	XClearArea (disp, root, win_x, win_y, width, height, False);
		393
355	for (lin = listlen; lin--;)	394	for (lin = listlen; lin--;)
356	{	395	{
357	struct linematrix *line =
358	lines + (opt_reverse ? listlen - lin - 1 : lin);	396	struct linematrix *line = lines + (opt_reverse ? listlen - lin - 1 : lin);
		397	struct displaymatrix *display_line = display + lin;
359		398
360	offset -= font_height;	399	offset -= font_height;
361		400
362	if (offset < miny \|\| offset > maxy)	401	if (offset < miny \|\| offset > maxy)
363	continue;	402	continue;
364		403
365	if (opt_shade)	404	/* if this line is a different than it was, then it
		405	* needs displaying */
		406	if (!opt_noflicker
		407	\|\| refresh_all
		408	\|\| display_line->len != line->len
		409	\|\| memcmp (display_line->line, line->line, line->len))
366	{	410	{
		411	/* don't bother updating the record of what has been
		412	* displayed if -noflicker isn't in effect, since we redraw
		413	* the whole display every time anyway */
		414	if (opt_noflicker)
		415	{
		416	/* update the record of what has been displayed;
		417	* first make sure the buffer is big enough */
		418	if (display_line->buffer_size <= line->len)
		419	{
		420	display_line->buffer_size = line->len + 1;
		421	display_line->line = xrealloc (display_line->line, display_line->buffer_size);
		422	}
		423
		424	display_line->len = line->len;
		425	memcpy (display_line->line, line->line, line->len);
		426
		427	if (clear)
		428	XClearArea (disp, root, win_x, win_y + offset - font_ascent,
		429	width + effect_x_space, font_height + effect_y_space, False);
		430	}
		431
		432	if (opt_outline)
		433	{
		434	int x, y;
367	XSetForeground (disp, WinGC, black_color);	435	XSetForeground (disp, WinGC, black_color);
		436
		437	for (x = -1; x < 2; x += 2)
		438	for (y = -1; y < 2; y += 2)
		439	XmbDrawString (disp, root, fontset, WinGC,
		440	win_x + effect_x_offset + x,
		441	win_y + y + offset,
		442	line->line, line->len);
		443	}
		444	else if (opt_shade)
		445	{
		446	XSetForeground (disp, WinGC, black_color);
368	XmbDrawString (disp, root, fontset, WinGC, win_x + 2,	447	XmbDrawString (disp, root, fontset, WinGC,
369	win_y + offset + 2, line->line, strlen (line->line));	448	win_x + effect_x_offset + SHADE_X,
		449	win_y + offset + SHADE_Y,
		450	line->line, line->len);
370	}	451	}
371		452
372	XSetForeground (disp, WinGC, line->color);	453	XSetForeground (disp, WinGC, line->color);
373	XmbDrawString (disp, root, fontset, WinGC, win_x, win_y + offset,	454	XmbDrawString (disp, root, fontset, WinGC,
		455	win_x + effect_x_offset,
		456	win_y + offset,
374	line->line, strlen (line->line));	457	line->line, line->len);
		458	}
375	}	459	}
376		460
377	if (opt_frame)	461	if (opt_frame)
		462	{
		463	XSetForeground (disp, WinGC, GetColor (def_color));
378	XDrawRectangle (disp, root, WinGC, win_x, win_y, width, height);	464	XDrawRectangle (disp, root, WinGC, win_x - 0, win_y - 0, width - 1, height - 1);
		465	}
379	}	466	}
380		467
381	#if HAS_REGEX	468	#if HAS_REGEX
382	void	469	void
383	transform_line (char *s)	470	transform_line (char *s)
…		…
395	if (transformre)	482	if (transformre)
396	{	483	{
397	int i;	484	int i;
398	regmatch_t matched[16];	485	regmatch_t matched[16];
399		486
400	i = regexec (&transformre, string, 16, matched, 0);	487	i = regexec (transformre, s, 16, matched, 0);
401	if (i == 0)	488	if (i == 0)
402	{ /* matched */	489	{ /* matched */
		490	int match_start = matched[0].rm_so;
		491	int match_end = matched[0].rm_eo;
		492	int old_len = match_end - match_start;
		493	int new_len = strlen(transform_to);
		494	int old_whole_len = strlen(s);
		495	printf("regexp was matched by '%s' - replace with '%s'\n", s, transform_to);
		496	printf("match is from %d to %d\n",
		497	match_start, match_end);
		498	if (new_len > old_len) {
		499	s = xrealloc(s, old_whole_len + new_len - old_len);
		500	}
		501	if (new_len != old_len) {
		502	memcpy(s + match_end + new_len - old_len,
		503	s + match_end,
		504	old_whole_len - match_end);
		505	s[old_whole_len + new_len - old_len] = '\0';
		506	}
		507	memcpy(s + match_start,
		508	transform_to,
		509	new_len);
		510	printf("transformed to '%s'\n", s);
403	}	511	}
		512	else
		513	{
		514	printf("regexp was not matched by '%s'\n", s);
		515	}
404	}	516	}
405	}	517	}
406	#endif	518	#endif
407		519
		520	char *
		521	concat_line (const char p1, const char p2)
		522	{
		523	int l1 = p1 ? strlen (p1) : 0;
		524	int l2 = strlen (p2);
		525	char *r = xmalloc (l1 + l2 + 1);
		526
		527	memcpy (r, p1, l1);
		528	memcpy (r + l1, p2, l2);
		529	r[l1 + l2] = 0;
		530
		531	return r;
		532	}
408		533
409	/*	534	/*
410	* This routine should read 'width' characters and not more. However,	535	* HACK-1: This routine should read a single line, no matter how long.
411	* we really want to read width + 1 characters if the last char is a '\n',
412	* which we should remove afterwards. So, read width+1 chars and ungetc
413	* the last character if it's not a newline. This means 'string' must be
414	* width + 2 wide!
415	*/	536	*/
416	int	537	int
417	lineinput (struct logfile_entry *logfile)	538	lineinput (struct logfile_entry *logfile)
418	{	539	{
419	char *string = logfile->buf;	540	char buff[1024], *p = buff;
420	int slen = width + 2;	541	int ch;
421	FILE *f = logfile->fp;	542	/* HACK-2: add on the length of any partial line which we will be appending to */
422		543	int ofs = logfile->buf ? strlen (logfile->buf) : 0;
423	int len = strlen (string);
424	int partial = logfile->partial;
425		544
426	do	545	do
427	{	546	{
428	if (fgets (string + len, slen - len, f) == NULL) /* EOF or Error */	547	ch = fgetc (logfile->fp);
429	return 0;
430		548
431	len = strlen (string);	549	if (ch == '\n' \|\| ch == EOF)
432	}	550	break;
433	while (len == 0);	551	else if (ch == '\r')
434		552	continue; /* skip */
435	logfile->partial = 0;	553	else if (ch == '\t')
436		554	{
437	if (string[len - 1] == '\n')	555	do
438	/* if the string ends in a newline, delete the newline */	556	{
439	string[len - 1] = '\0'; /* erase newline */	557	*p++ = ' ';
440	else if (len >= slen - 1)	558	ofs++;
		559	}
		560	while (ofs & 7);
		561	}
		562	else
		563	{
		564	*p++ = ch;
		565	ofs++;
		566	}
441	{	567	}
442	/* otherwise if we've read one too many characters, un-read the last one and delete it */	568	while (p < buff + (sizeof buff) - 8 - 1);
443	ungetc (string[len - 1], f);	569
444	string[len - 1] = '\0';	570	if (p == buff && ch == EOF)
445	}
446	else if (opt_whole)
447	return 0;	571	return 0;
448	else	572
		573	*p = 0;
		574
		575	p = concat_line (logfile->buf, buff);
		576	free (logfile->buf); logfile->buf = p;
		577
		578	logfile->lastpartial = logfile->partial;
		579	/* there are 3 ways we could have exited the loop: reading '\n',
		580	* reaching EOF, or filling the buffer; the 2nd and 3rd of these
		581	* both result in a partial line */
449	logfile->partial = 1;	582	logfile->partial = ch != '\n';
		583
		584	if (logfile->partial && opt_whole)
		585	return 0;
450		586
451	#if HAS_REGEX	587	#if HAS_REGEX
452	transform_line (string);	588	transform_line (logfile->buf);
453	#endif	589	#endif
454	logfile->lastpartial = partial;
455	return len;	590	return 1;
456	}	591	}
457		592
458	/* input: reads file->fname	593	/* input: reads file->fname
459	* output: fills file->fp, file->inode	594	* output: fills file->fp, file->inode
460	* returns file->fp	595	* returns file->fp
…		…
523	if (stat (e->fname, &stats) < 0)	658	if (stat (e->fname, &stats) < 0)
524	{ /* file missing? */	659	{ /* file missing? */
525	sleep (1);	660	sleep (1);
526	if (e->fp)	661	if (e->fp)
527	fclose (e->fp);	662	fclose (e->fp);
528	if (openlog (e) == NULL)	663	openlog (e);
529	break;	664	continue;
530	}	665	}
531		666
		667	/* HACK-3: stats can be uninitialised here (if the file didn't
		668	* exist when stat() was called, but was recreated during the
		669	* sleep(1)) */
532	if (stats.st_ino != e->inode)	670	if (stats.st_ino != e->inode)
533	{ /* file renamed? */	671	{ /* file renamed? */
534	if (e->fp)	672	if (e->fp)
535	fclose (e->fp);	673	fclose (e->fp);
536	if (openlog (e) == NULL)	674	if (openlog (e) == NULL)
537	break;	675	continue;
538	}	676	}
539		677
540	if (stats.st_size < e->last_size)	678	if (stats.st_size < e->last_size)
541	{ /* file truncated? */	679	{ /* file truncated? */
542	fseek (e->fp, 0, SEEK_SET);	680	fseek (e->fp, 0, SEEK_SET);
543	e->last_size = stats.st_size;	681	e->last_size = stats.st_size;
544	}	682	}
545	}	683	}
546	}	684	}
547		685
548	#define SCROLL_UP(lines, listlen) \	686	/*
549	{ \	687	* insert a single physical line (that must be short enough to fit)
550	int cur_line; \	688	* at position "idx" by pushing up lines above it. the caller
551	struct logfile_entry *current; \	689	* MUST then fill in lines[idx] with valid data.
		690	*/
		691	static void
		692	insert_line (int idx)
		693	{
		694	int cur_line;
		695	struct logfile_entry *current;
		696
		697	free (lines[0].line);
		698
552	for (cur_line = 0; cur_line < (listlen - 1); cur_line++) { \	699	for (cur_line = 0; cur_line < idx; cur_line++)
553	strcpy(lines[cur_line].line, lines[cur_line + 1].line); \
554	lines[cur_line].color = lines[cur_line + 1].color; \	700	lines[cur_line] = lines[cur_line + 1];
555	} \	701
556	for (current = loglist; current; current = current->next) \	702	for (current = loglist; current; current = current->next)
557	if (current->partial && current->index) \	703	if (current->index <= idx)
558	current->index--; \	704	current->index--;
559	}	705	}
560		706
561	void	707	/*
		708	* remove a single physical line at position "idx" by moving the lines above it
		709	* down and inserting a "~" line at the top.
		710	*/
		711	static void
		712	delete_line (int idx)
		713	{
		714	int cur_line;
		715	struct logfile_entry *current;
		716
		717	for (cur_line = idx; cur_line > 0; cur_line--)
		718	lines[cur_line] = lines[cur_line - 1];
		719
		720	lines[0].line = xstrdup ("~");
		721
		722	for (current = loglist; current; current = current->next)
		723	if (current->index >= 0 && current->index <= idx)
		724	current->index++;
		725	}
		726
		727	/*
		728	* takes a logical log file line and splits it into multiple physical
		729	* screen lines by splitting it whenever a part becomes too long.
		730	* lal lines will be inserted at position "idx".
		731	*/
		732	static void
		733	split_line (int idx, const char *str, unsigned long color)
		734	{
		735	int l = strlen (str);
		736	int last_wrapped = 0;
		737	const char *p = str;
		738	static int continuation_width = -1;
		739	static int continuation_length;
		740
		741	/* only calculate the continuation's width once */
		742	if (continuation_width == -1)
		743	{
		744	continuation_length = strlen(continuation);
		745	continuation_width = XmbTextEscapement (fontset, continuation, continuation_length);
		746	}
		747
		748	do
		749	{
		750	const char *beg = p;
		751	int w = last_wrapped ? continuation_width : 0;
		752	int wrapped = 0;
		753	const char *break_p = NULL;
		754
		755	while (*p)
		756	{
		757	/* find the length in bytes of the next multibyte character */
		758	int len = mblen (p, l);
		759	if (len <= 0)
		760	len = 1; /* ignore (don't skip) illegal character sequences */
		761
		762	/* find the width in pixels of the next character */
		763	int cw = XmbTextEscapement (fontset, p, len);
		764	if (cw + w > width - effect_x_space)
		765	{
		766	if (p == beg)
		767	{
		768	fprintf(stderr, "we can't even fit a single character onto the line\n");
		769	if (len == 1) fprintf(stderr, "(the character we couldn't fit was '%c')\n", *p);
		770	exit(1);
		771	}
		772
		773	wrapped = 1;
		774	break;
		775	}
		776
		777	if (opt_wordwrap && len == 1 && p[0] == ' ')
		778	break_p = p;
		779
		780	w += cw;
		781	p += len;
		782	l -= len;
		783	}
		784
		785	/* if we're wrapping at spaces, and the line is long enough to
		786	* wrap, and we've seen a space already, and the space wasn't
		787	* the first character on the line, then wrap at the space */
		788	if (opt_wordwrap && wrapped && break_p && break_p != beg)
		789	{
		790	l += p - break_p;
		791	p = break_p;
		792	}
		793
		794	{
		795	/* HACK-4 - consider inserting the 'continuation string'
		796	* before the rest of the wrapped line */
		797	int len = p - beg + (last_wrapped ? continuation_length : 0);
		798	char *s = xmalloc (len + 1);
		799	if (last_wrapped)
		800	{
		801	memcpy (s, continuation, continuation_length);
		802	memcpy (s + continuation_length, beg, p - beg);
		803	}
		804	else
		805	memcpy (s, beg, len);
		806
		807	s[len] = 0;
		808	insert_line (idx);
		809	lines[idx].line = s;
		810	lines[idx].len = len;
		811	lines[idx].color = color;
		812	}
		813
		814	/* if we wrapped at a space, don't display the space */
		815	if (opt_wordwrap && wrapped && break_p && break_p != beg)
		816	{
		817	l--;
		818	p++;
		819	}
		820
		821	last_wrapped = wrapped;
		822	}
		823	while (l);
		824	}
		825
		826	/*
		827	* append something to an existing physical line. this is done
		828	* by deleting the file on-screen, concatenating the new data to it
		829	* and splitting it again.
		830	*/
		831	static void
		832	append_line (int idx, const char *str)
		833	{
		834	unsigned long color = lines[idx].color;
		835	char *old = lines[idx].line;
		836	char *new = concat_line (old, str);
		837
		838	free (old);
		839
		840	delete_line (idx);
		841	split_line (idx, new, color);
		842	}
		843
		844	static void
562	main_loop (void)	845	main_loop (void)
563	{	846	{
564	struct linematrix lines = xmalloc (sizeof (struct linematrix) listlen);	847	lines = xmalloc (sizeof (struct linematrix) * listlen);
565	int lin, miny, maxy;	848	display = xmalloc (sizeof (struct displaymatrix) * listlen);
		849	int lin;
566	time_t lastreload;	850	time_t lastreload;
567	Region region = XCreateRegion ();	851	Region region = XCreateRegion ();
568	XEvent xev;	852	XEvent xev;
569	struct logfile_entry *lastprinted = NULL;	853	struct logfile_entry *lastprinted = NULL;
570	struct logfile_entry *current;	854	struct logfile_entry *current;
		855	int need_update = 1;
571		856
572	maxy = 0;
573	miny = win_y + height;
574	lastreload = time (NULL);	857	lastreload = time (NULL);
575		858
576	/* Initialize linematrix */	859	/* Initialize linematrix */
577	for (lin = 0; lin < listlen; lin++)	860	for (lin = 0; lin < listlen; lin++)
578	{	861	{
579	lines[lin].line = xmalloc (width + 2);	862	lines[lin].line = xstrdup ("~");
580	strcpy (lines[lin].line, "~");	863	lines[lin].len = 1;
		864	display[lin].line = xstrdup("");
		865	display[lin].len = 0;
		866	display[lin].buffer_size = 1;
581	lines[lin].color = GetColor (def_color);	867	lines[lin].color = GetColor (def_color);
582	}	868	}
583		869
584	/* show the display full of empty lines ("~") in case the first
585	* time around the loop doesn't produce any output, as it won't if
586	* either (a) -noinitial is set or (b) all the files are currently
587	* empty */
588	redraw ();
589
590	for (;;)	870	for (;;)
591	{	871	{
592	int need_update = 0;
593
594	/* read logs */	872	/* read logs */
595	for (current = loglist; current; current = current->next)	873	for (current = loglist; current; current = current->next)
596	{	874	{
597	if (!current->fp)	875	if (!current->fp)
598	continue; /* skip missing files */	876	continue; /* skip missing files */
599		877
600	clearerr (current->fp);	878	clearerr (current->fp);
601		879
602	while (lineinput (current) != 0)	880	while (lineinput (current))
603	{	881	{
		882	need_update = 1;
604	/* if we're trying to update old partial lines in	883	/* if we're trying to update old partial lines in
605	* place, and the last time this file was updated the	884	* place, and the last time this file was updated the
606	* output was partial, and that partial line is not	885	* output was partial, and that partial line is not
607	* too close to the top of the screen, then update	886	* too close to the top of the screen, then update
608	* that partial line */	887	* that partial line */
609	if (opt_update && current->lastpartial && current->index >= 3)	888	if (opt_update && current->lastpartial && current->index >= 0)
610	{	889	{
611	int old_len = strlen (lines[current->index].line);	890	int idx = current->index;
612	int new_len = strlen (current->buf);	891	append_line (idx, current->buf);
613	int space_on_old_line = width / font_width - old_len; //D	892	current->index = idx;
614		893	free (current->buf), current->buf = 0;
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,
626	current->buf + space_on_old_line,
627	new_len - space_on_old_line + 1);
628	}
629	else
630	{
631	need_update = 1;
632	strcpy (current->buf, "");
633	continue;	894	continue;
634	}
635	}	895	}
636		896
637	/* print filename if any, and if last line was from	897	/* print filename if any, and if last line was from
638	* different file */	898	* different file */
639	if (!opt_nofilename &&
640	lastprinted != current && current->desc[0])	899	if (!opt_nofilename && lastprinted != current && current->desc[0])
641	{	900	{
642	SCROLL_UP (lines, listlen);	901	char buf[1024]; /* HACK-5 */
643	sprintf (lines[listlen - 1].line, "[%s]", current->desc);	902	snprintf (buf, sizeof (buf), "[%s]", current->desc);
644	lines[listlen - 1].color = current->color;	903	split_line (listlen - 1, buf, current->color);
645	}	904	}
646		905
		906	/* if we're dealing with partial lines, and the last
		907	* time we showed the line it wasn't finished ... */
		908	if (!opt_whole && current->lastpartial)
		909	{
647	/* if this is the same file we showed last, and the	910	/* if this is the same file we showed last then
648	* last time we showed it, it wasn't finished, then
649	* append to the last line shown */	911	append to the last line shown */
650	if (lastprinted == current && current->lastpartial)	912	if (lastprinted == current)
651	{	913	append_line (listlen - 1, current->buf);
652	int old_len = strlen (lines[listlen - 1].line);	914	else
653	int new_len = strlen (current->buf);	915	{
654	strncat (lines[listlen - 1].line, current->buf,	916	/* but if a different file has been shown in the
655	width - old_len);	917	* mean time, make a new line, starting with the
656	/* if it doesn't all fit, then put the part that	918	* continuation string */
657	* doesn't fit on a new line */	919	split_line (listlen - 1, continuation, current->color);
658	if (new_len > width - old_len)	920	append_line (listlen - 1, current->buf);
659	{	921	}
660	SCROLL_UP (lines, listlen);	922	}
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	}
684	}
685	else	923	else
686	{	924	/* otherwise just make a plain and simple new line */
687	SCROLL_UP (lines, listlen);	925	split_line (listlen - 1, current->buf, current->color);
688	strcpy (lines[listlen - 1].line, current->buf);
689	}
690		926
691	/* we've shown the line now. clear the buffer for the next line */	927	free (current->buf), current->buf = 0;
692	strcpy (current->buf, "");
693	current->index = listlen - 1;	928	current->index = listlen - 1;
694	lines[listlen - 1].color = current->color;
695
696	lastprinted = current;	929	lastprinted = current;
697	need_update = 1;
698	}	930	}
699	}	931	}
700		932
701	if (need_update)	933	if (need_update)
		934	{
702	redraw ();	935	redraw (0);
		936	need_update = 0;
		937	}
703	else	938	else
704	{	939	{
705	XFlush (disp);	940	XFlush (disp);
706		941
707	if (!XPending (disp))	942	if (!XPending (disp))
…		…
733		968
734	r.x = xev.xexpose.x;	969	r.x = xev.xexpose.x;
735	r.y = xev.xexpose.y;	970	r.y = xev.xexpose.y;
736	r.width = xev.xexpose.width;	971	r.width = xev.xexpose.width;
737	r.height = xev.xexpose.height;	972	r.height = xev.xexpose.height;
		973
738	XUnionRectWithRegion (&r, region, region);	974	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	}	975	}
744	break;	976	break;
745	default:	977	default:
746	#ifdef DEBUGMODE	978	#ifdef DEBUGMODE
747	fprintf (stderr, "PANIC! Unknown event %d\n", xev.type);	979	fprintf (stderr, "PANIC! Unknown event %d\n", xev.type);
…		…
760	lastreload = time (NULL);	992	lastreload = time (NULL);
761	}	993	}
762		994
763	if (!XEmptyRegion (region))	995	if (!XEmptyRegion (region))
764	{	996	{
		997	XRectangle r;
		998
765	XSetRegion (disp, WinGC, region);	999	XSetRegion (disp, WinGC, region);
		1000	XClipBox (region, &r);
766		1001
767	refresh (lines, miny, maxy);	1002	refresh (r.y, r.y + r.height, 0, 1);
		1003
768	XDestroyRegion (region);	1004	XDestroyRegion (region);
769	region = XCreateRegion ();	1005	region = XCreateRegion ();
770	maxy = 0;
771	miny = win_y + height;
772	}	1006	}
773	}	1007	}
774	}	1008	}
775		1009
776		1010
…		…
814	continuation = argv[++i];	1048	continuation = argv[++i];
815	else if (!strcmp (arg, "-font") \|\| !strcmp (arg, "-fn"))	1049	else if (!strcmp (arg, "-font") \|\| !strcmp (arg, "-fn"))
816	fontname = argv[++i];	1050	fontname = argv[++i];
817	#if HAS_REGEX	1051	#if HAS_REGEX
818	else if (!strcmp (arg, "-t"))	1052	else if (!strcmp (arg, "-t"))
		1053	{
819	transform = argv[++i];	1054	transform = argv[++i];
		1055	transform_to = argv[++i];
		1056	printf("transform: '%s' to '%s'\n", transform, transform_to);
		1057	}
820	#endif	1058	#endif
821	else if (!strcmp (arg, "-fork") \|\| !strcmp (arg, "-f"))	1059	else if (!strcmp (arg, "-fork") \|\| !strcmp (arg, "-f"))
822	opt_daemonize = 1;	1060	opt_daemonize = 1;
823	else if (!strcmp (arg, "-reload"))	1061	else if (!strcmp (arg, "-reload"))
824	{	1062	{
825	reload = atoi (argv[++i]);	1063	reload = atoi (argv[++i]);
826	command = argv[++i];	1064	command = argv[++i];
827	}	1065	}
828	else if (!strcmp (arg, "-shade"))	1066	else if (!strcmp (arg, "-shade"))
829	opt_shade = 1;	1067	opt_shade = 1;
		1068	else if (!strcmp (arg, "-outline"))
		1069	opt_outline = 1;
		1070	else if (!strcmp (arg, "-noflicker"))
		1071	opt_noflicker = 1;
830	else if (!strcmp (arg, "-frame"))	1072	else if (!strcmp (arg, "-frame"))
831	opt_frame = 1;	1073	opt_frame = 1;
832	else if (!strcmp (arg, "-no-filename"))	1074	else if (!strcmp (arg, "-no-filename"))
833	opt_nofilename = 1;	1075	opt_nofilename = 1;
834	else if (!strcmp (arg, "-reverse"))	1076	else if (!strcmp (arg, "-reverse"))
…		…
837	opt_whole = 1;	1079	opt_whole = 1;
838	else if (!strcmp (arg, "-partial"))	1080	else if (!strcmp (arg, "-partial"))
839	opt_partial = 1;	1081	opt_partial = 1;
840	else if (!strcmp (arg, "-update"))	1082	else if (!strcmp (arg, "-update"))
841	opt_update = opt_partial = 1;	1083	opt_update = opt_partial = 1;
		1084	else if (!strcmp (arg, "-wordwrap"))
		1085	opt_wordwrap = 1;
842	else if (!strcmp (arg, "-color"))	1086	else if (!strcmp (arg, "-color"))
843	def_color = argv[++i];	1087	def_color = argv[++i];
844	else if (!strcmp (arg, "-noinitial"))	1088	else if (!strcmp (arg, "-noinitial"))
845	opt_noinitial = 1;	1089	opt_noinitial = 1;
846	else if (!strcmp (arg, "-id"))	1090	else if (!strcmp (arg, "-id"))
…		…
880	desc = p + 1;	1124	desc = p + 1;
881	}	1125	}
882	}	1126	}
883		1127
884	e = xmalloc (sizeof (struct logfile_entry));	1128	e = xmalloc (sizeof (struct logfile_entry));
		1129	e->partial = 0;
		1130	e->buf = 0;
		1131	e->index = -1;
		1132
885	if (arg[0] == '-' && arg[1] == '\0')	1133	if (arg[0] == '-' && arg[1] == '\0')
886	{	1134	{
887	if ((e->fp = fdopen (0, "r")) == NULL)	1135	if ((e->fp = fdopen (0, "r")) == NULL)
888	perror ("fdopen"), exit (1);	1136	perror ("fdopen"), exit (1);
889	if (fcntl (0, F_SETFL, O_NONBLOCK) < 0)	1137	if (fcntl (0, F_SETFL, O_NONBLOCK) < 0)
…		…
899	e->fname = xstrdup (fname);	1147	e->fname = xstrdup (fname);
900	if (openlog (e) == NULL)	1148	if (openlog (e) == NULL)
901	perror (fname), exit (1);	1149	perror (fname), exit (1);
902		1150
903	l = strlen (desc);	1151	l = strlen (desc);
		1152	/* HACK-6: width is in pixels now */
904	if (l > width - 2) /* must account for [ ] */	1153	if (l > width - 2) /* must account for [ ] */
905	l = width - 2;	1154	l = width - 2;
906	e->desc = xmalloc (l + 1);	1155	e->desc = xmalloc (l + 1);
907	memcpy (e->desc, desc, l);	1156	memcpy (e->desc, desc, l);
908	*(e->desc + l) = '\0';	1157	*(e->desc + l) = '\0';
909	}	1158	}
910		1159
911	e->color = GetColor (fcolor);	1160	e->color = GetColor (fcolor);
912	e->buf = xmalloc (width + 2);
913	e->partial = 0;	1161	e->partial = 0;
914	e->buf[0] = '\0';
915	e->next = NULL;	1162	e->next = NULL;
916		1163
917	if (!loglist)	1164	if (!loglist)
918	loglist = e;	1165	loglist = e;
919	if (loglist_tail)	1166	if (loglist_tail)
…		…
933	{	1180	{
934	fprintf (stderr, "Specify at most one of -partial and -whole\n");	1181	fprintf (stderr, "Specify at most one of -partial and -whole\n");
935	exit (1);	1182	exit (1);
936	}	1183	}
937		1184
		1185	/* HACK-7: do we want to allow both -shade and -outline? */
		1186	if (opt_shade && opt_outline)
		1187	{
		1188	fprintf (stderr, "Specify at most one of -shade and -outline\n");
		1189	exit (1);
		1190	}
		1191
938	if (opt_partial)	1192	if (opt_partial)
939	/* if we specifically requested to see partial lines then don't insist on whole lines */	1193	/* if we specifically requested to see partial lines then don't insist on whole lines */
940	opt_whole = 0;	1194	opt_whole = 0;
941	else if (file_count > 1)	1195	else if (file_count > 1)
942	/* otherwise, if we've viewing multiple files, default to showing whole lines */	1196	/* otherwise, if we're viewing multiple files, default to showing whole lines */
943	opt_whole = 1;	1197	opt_whole = 1;
944		1198
945	#if HAS_REGEX	1199	#if HAS_REGEX
946	if (transform)	1200	if (transform)
947	{	1201	{
948	int i;	1202	int i;
949		1203
		1204	printf("compiling regexp '%s'\n", transform);
950	transformre = xmalloc (sizeof (transformre));	1205	transformre = xmalloc (sizeof (regex_t));
951	i = regcomp (&transformre, transform, REG_EXTENDED);	1206	i = regcomp (transformre, transform, REG_EXTENDED);
952	if (i != 0)	1207	if (i != 0)
953	{	1208	{
954	char buf[512];	1209	char buf[512];
955		1210
956	regerror (i, &transformre, buf, sizeof (buf));	1211	regerror (i, transformre, buf, sizeof (buf));
957	fprintf (stderr, "Cannot compile regular expression: %s\n", buf);	1212	fprintf (stderr, "Cannot compile regular expression: %s\n", buf);
958	}	1213	}
		1214	else
		1215	{
		1216	printf("compiled '%s' OK to %x\n", transform, (int)transformre);
		1217	}
959	}	1218	}
960	#endif	1219	#endif
961		1220
962	InitWindow ();	1221	InitWindow ();
963		1222
…		…
1011	while ((p = malloc (size)) == NULL)	1270	while ((p = malloc (size)) == NULL)
1012	{	1271	{
1013	fprintf (stderr, "Memory exausted.");	1272	fprintf (stderr, "Memory exausted.");
1014	sleep (10);	1273	sleep (10);
1015	}	1274	}
		1275
		1276	return p;
		1277	}
		1278
		1279	void *
		1280	xrealloc (void *ptr, size_t size)
		1281	{
		1282	void *p;
		1283
		1284	while ((p = realloc (ptr, size)) == NULL)
		1285	{
		1286	fprintf (stderr, "Memory exausted.");
		1287	sleep (10);
		1288	}
		1289
1016	return p;	1290	return p;
1017	}	1291	}
1018		1292
1019	void	1293	void
1020	display_help (char *myname)	1294	display_help (char *myname)
…		…
1030	" -reverse print new lines at the top\n"	1304	" -reverse print new lines at the top\n"
1031	" -whole wait for \\n before showing a line\n"	1305	" -whole wait for \\n before showing a line\n"
1032	" -partial show lines even if they don't end with a \\n\n"	1306	" -partial show lines even if they don't end with a \\n\n"
1033	" -update allow updates to old partial lines\n"	1307	" -update allow updates to old partial lines\n"
1034	" -cont string to prefix continued partial lines with\n"	1308	" -cont string to prefix continued partial lines with\n"
		1309	" -wordwrap wrap long lines at spaces to avoid breaking words\n"
1035	" defaults to \"[+]\"\n"	1310	" defaults to \"[+]\"\n"
1036	" -shade add shading to font\n"	1311	" -shade add shading to font\n"
1037	" -noinitial don't display the last file lines on\n"	1312	" -noinitial don't display the last file lines on\n"
1038	" startup\n"	1313	" startup\n"
1039	" -i \| -interval seconds interval between checks (fractional\n"	1314	" -i \| -interval seconds interval between checks (fractional\n"
1040	" values o.k.). Default 3 seconds\n"	1315	" values o.k.). Default 2.4 seconds\n"
1041	" -V display version information and exit\n"	1316	" -V display version information and exit\n"
1042	"\n");	1317	"\n");
1043	printf ("Example:\n%s -g 80x25+100+50 -font fixed /var/log/messages,green "	1318	printf ("Example:\n%s -g 80x25+100+50 -font fixed /var/log/messages,green "
1044	"/var/log/secure,red,'ALERT'\n", myname);	1319	"/var/log/secure,red,'ALERT'\n", myname);
1045	exit (0);	1320	exit (0);
…		…
1053	}	1328	}
1054		1329
1055	int	1330	int
1056	daemonize (void)	1331	daemonize (void)
1057	{	1332	{
		1333	pid_t pid;
		1334
1058	switch (fork ())	1335	switch (pid = fork ())
1059	{	1336	{
1060	case -1:	1337	case -1:
1061	return -1;	1338	return -1;
1062	case 0:	1339	case 0:
1063	break;	1340	break;
1064	default:	1341	default:
		1342	/printf("%d\n", pid);/
1065	_exit (0);	1343	exit (0);
1066	}	1344	}
1067		1345
1068	if (setsid () == -1)	1346	if (setsid () == -1)
1069	return -1;	1347	return -1;
1070		1348

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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 1.36 by pcg, Wed Mar 31 01:46:10 2004 UTC

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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 1.36 by pcg, Wed Mar 31 01:46:10 2004 UTC