[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 1.39 by pcg, Wed Mar 31 01:59:19 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;
		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 <= 1; x += 2)
		438	for (y = -1; y <= 1; 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
		496	printf ("regexp was matched by '%s' - replace with '%s'\n", s, transform_to);
		497	printf ("match is from %d to %d\n", 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	{
		503	memcpy(s + match_end + new_len - old_len,
		504	s + match_end,
		505	old_whole_len - match_end);
		506	s[old_whole_len + new_len - old_len] = '\0';
403	}	507	}
		508
		509	memcpy (s + match_start,
		510	transform_to,
		511	new_len);
		512	printf ("transformed to '%s'\n", s);
		513	}
		514	else
		515	{
		516	printf ("regexp was not matched by '%s'\n", s);
		517	}
404	}	518	}
405	}	519	}
406	#endif	520	#endif
407		521
		522	char *
		523	concat_line (const char p1, const char p2)
		524	{
		525	int l1 = p1 ? strlen (p1) : 0;
		526	int l2 = strlen (p2);
		527	char *r = xmalloc (l1 + l2 + 1);
		528
		529	memcpy (r, p1, l1);
		530	memcpy (r + l1, p2, l2);
		531	r[l1 + l2] = 0;
		532
		533	return r;
		534	}
408		535
409	/*	536	/*
410	* This routine should read 'width' characters and not more. However,	537	* 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	*/	538	*/
416	int	539	int
417	lineinput (struct logfile_entry *logfile)	540	lineinput (struct logfile_entry *logfile)
418	{	541	{
419	char *string = logfile->buf;	542	char buff[1024], *p = buff;
420	int slen = width + 2;	543	int ch;
421	FILE *f = logfile->fp;	544	/* HACK-2: add on the length of any partial line which we will be appending to */
422		545	int ofs = logfile->buf ? strlen (logfile->buf) : 0;
423	int len = strlen (string);
424	int partial = logfile->partial;
425		546
426	do	547	do
427	{	548	{
428	if (fgets (string + len, slen - len, f) == NULL) /* EOF or Error */	549	ch = fgetc (logfile->fp);
429	return 0;
430		550
431	len = strlen (string);	551	if (ch == '\n' \|\| ch == EOF)
432	}	552	break;
433	while (len == 0);	553	else if (ch == '\r')
434		554	continue; /* skip */
435	logfile->partial = 0;	555	else if (ch == '\t')
436		556	{
437	if (string[len - 1] == '\n')	557	do
438	/* if the string ends in a newline, delete the newline */	558	{
439	string[len - 1] = '\0'; /* erase newline */	559	*p++ = ' ';
440	else if (len >= slen - 1)	560	ofs++;
		561	}
		562	while (ofs & 7);
		563	}
		564	else
		565	{
		566	*p++ = ch;
		567	ofs++;
		568	}
441	{	569	}
442	/* otherwise if we've read one too many characters, un-read the last one and delete it */	570	while (p < buff + (sizeof buff) - 8 - 1);
443	ungetc (string[len - 1], f);	571
444	string[len - 1] = '\0';	572	if (p == buff && ch == EOF)
445	}
446	else if (opt_whole)
447	return 0;	573	return 0;
448	else	574
		575	*p = 0;
		576
		577	p = concat_line (logfile->buf, buff);
		578	free (logfile->buf); logfile->buf = p;
		579
		580	logfile->lastpartial = logfile->partial;
		581	/* there are 3 ways we could have exited the loop: reading '\n',
		582	* reaching EOF, or filling the buffer; the 2nd and 3rd of these
		583	* both result in a partial line */
449	logfile->partial = 1;	584	logfile->partial = ch != '\n';
		585
		586	if (logfile->partial && opt_whole)
		587	return 0;
450		588
451	#if HAS_REGEX	589	#if HAS_REGEX
452	transform_line (string);	590	transform_line (logfile->buf);
453	#endif	591	#endif
454	logfile->lastpartial = partial;
455	return len;	592	return 1;
456	}	593	}
457		594
458	/* input: reads file->fname	595	/* input: reads file->fname
459	* output: fills file->fp, file->inode	596	* output: fills file->fp, file->inode
460	* returns file->fp	597	* returns file->fp
…		…
524	{ /* file missing? */	661	{ /* file missing? */
525	sleep (1);	662	sleep (1);
526	if (e->fp)	663	if (e->fp)
527	fclose (e->fp);	664	fclose (e->fp);
528	if (openlog (e) == NULL)	665	if (openlog (e) == NULL)
529	break;	666	continue;
		667	if (fstat (fileno (e->fp), &stats) < 0)
		668	continue;
530	}	669	}
531		670
532	if (stats.st_ino != e->inode)	671	if (stats.st_ino != e->inode)
533	{ /* file renamed? */	672	{ /* file renamed? */
534	if (e->fp)	673	if (e->fp)
535	fclose (e->fp);	674	fclose (e->fp);
536	if (openlog (e) == NULL)	675	if (openlog (e) == NULL)
537	break;	676	continue;
		677	if (fstat (fileno (e->fp), &stats) < 0)
		678	continue;
538	}	679	}
539		680
540	if (stats.st_size < e->last_size)	681	if (stats.st_size < e->last_size)
541	{ /* file truncated? */	682	{ /* file truncated? */
542	fseek (e->fp, 0, SEEK_SET);	683	fseek (e->fp, 0, SEEK_SET);
543	e->last_size = stats.st_size;	684	e->last_size = stats.st_size;
544	}	685	}
545	}	686	}
546	}	687	}
547		688
548	#define SCROLL_UP(lines, listlen) \	689	/*
549	{ \	690	* insert a single physical line (that must be short enough to fit)
550	int cur_line; \	691	* at position "idx" by pushing up lines above it. the caller
551	struct logfile_entry *current; \	692	* MUST then fill in lines[idx] with valid data.
		693	*/
		694	static void
		695	insert_line (int idx)
		696	{
		697	int cur_line;
		698	struct logfile_entry *current;
		699
		700	free (lines[0].line);
		701
552	for (cur_line = 0; cur_line < (listlen - 1); cur_line++) { \	702	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; \	703	lines[cur_line] = lines[cur_line + 1];
555	} \	704
556	for (current = loglist; current; current = current->next) \	705	for (current = loglist; current; current = current->next)
557	if (current->partial && current->index) \	706	if (current->index <= idx)
558	current->index--; \	707	current->index--;
559	}	708	}
560		709
561	void	710	/*
		711	* remove a single physical line at position "idx" by moving the lines above it
		712	* down and inserting a "~" line at the top.
		713	*/
		714	static void
		715	delete_line (int idx)
		716	{
		717	int cur_line;
		718	struct logfile_entry *current;
		719
		720	for (cur_line = idx; cur_line > 0; cur_line--)
		721	lines[cur_line] = lines[cur_line - 1];
		722
		723	lines[0].line = xstrdup ("~");
		724
		725	for (current = loglist; current; current = current->next)
		726	if (current->index >= 0 && current->index <= idx)
		727	current->index++;
		728	}
		729
		730	/*
		731	* takes a logical log file line and splits it into multiple physical
		732	* screen lines by splitting it whenever a part becomes too long.
		733	* lal lines will be inserted at position "idx".
		734	*/
		735	static void
		736	split_line (int idx, const char *str, unsigned long color)
		737	{
		738	int l = strlen (str);
		739	int last_wrapped = 0;
		740	const char *p = str;
		741	static int continuation_width = -1;
		742	static int continuation_length;
		743
		744	/* only calculate the continuation's width once */
		745	if (continuation_width == -1)
		746	{
		747	continuation_length = strlen (continuation);
		748	continuation_width = XmbTextEscapement (fontset, continuation, continuation_length);
		749	}
		750
		751	do
		752	{
		753	const char *beg = p;
		754	int w = last_wrapped ? continuation_width : 0;
		755	int wrapped = 0;
		756	const char *break_p = NULL;
		757
		758	while (*p)
		759	{
		760	/* find the length in bytes of the next multibyte character */
		761	int len = mblen (p, l);
		762	if (len <= 0)
		763	len = 1; /* ignore (don't skip) illegal character sequences */
		764
		765	/* find the width in pixels of the next character */
		766	int cw = XmbTextEscapement (fontset, p, len);
		767	if (cw + w > width - effect_x_space)
		768	{
		769	if (p == beg)
		770	{
		771	fprintf (stderr, "we can't even fit a single character onto the line\n");
		772	if (len == 1) fprintf (stderr, "(the character we couldn't fit was '%c')\n", *p);
		773	exit (1);
		774	}
		775
		776	wrapped = 1;
		777	break;
		778	}
		779
		780	if (opt_wordwrap && len == 1 && p[0] == ' ')
		781	break_p = p;
		782
		783	w += cw;
		784	p += len;
		785	l -= len;
		786	}
		787
		788	/* if we're wrapping at spaces, and the line is long enough to
		789	* wrap, and we've seen a space already, and the space wasn't
		790	* the first character on the line, then wrap at the space */
		791	if (opt_wordwrap && wrapped && break_p && break_p != beg)
		792	{
		793	l += p - break_p;
		794	p = break_p;
		795	}
		796
		797	{
		798	/* HACK-4 - consider inserting the 'continuation string'
		799	* before the rest of the wrapped line */
		800	int len = p - beg + (last_wrapped ? continuation_length : 0);
		801	char *s = xmalloc (len + 1);
		802	if (last_wrapped)
		803	{
		804	memcpy (s, continuation, continuation_length);
		805	memcpy (s + continuation_length, beg, p - beg);
		806	}
		807	else
		808	memcpy (s, beg, len);
		809
		810	s[len] = 0;
		811	insert_line (idx);
		812	lines[idx].line = s;
		813	lines[idx].len = len;
		814	lines[idx].color = color;
		815	}
		816
		817	/* if we wrapped at a space, don't display the space */
		818	if (opt_wordwrap && wrapped && break_p && break_p != beg)
		819	{
		820	l--;
		821	p++;
		822	}
		823
		824	last_wrapped = wrapped;
		825	}
		826	while (l);
		827	}
		828
		829	/*
		830	* append something to an existing physical line. this is done
		831	* by deleting the file on-screen, concatenating the new data to it
		832	* and splitting it again.
		833	*/
		834	static void
		835	append_line (int idx, const char *str)
		836	{
		837	unsigned long color = lines[idx].color;
		838	char *old = lines[idx].line;
		839	char *new = concat_line (old, str);
		840
		841	free (old);
		842
		843	delete_line (idx);
		844	split_line (idx, new, color);
		845	}
		846
		847	static void
562	main_loop (void)	848	main_loop (void)
563	{	849	{
564	struct linematrix lines = xmalloc (sizeof (struct linematrix) listlen);	850	lines = xmalloc (sizeof (struct linematrix) * listlen);
565	int lin, miny, maxy;	851	display = xmalloc (sizeof (struct displaymatrix) * listlen);
		852	int lin;
566	time_t lastreload;	853	time_t lastreload;
567	Region region = XCreateRegion ();	854	Region region = XCreateRegion ();
568	XEvent xev;	855	XEvent xev;
569	struct logfile_entry *lastprinted = NULL;	856	struct logfile_entry *lastprinted = NULL;
570	struct logfile_entry *current;	857	struct logfile_entry *current;
		858	int need_update = 1;
571		859
572	maxy = 0;
573	miny = win_y + height;
574	lastreload = time (NULL);	860	lastreload = time (NULL);
575		861
576	/* Initialize linematrix */	862	/* Initialize linematrix */
577	for (lin = 0; lin < listlen; lin++)	863	for (lin = 0; lin < listlen; lin++)
578	{	864	{
579	lines[lin].line = xmalloc (width + 2);	865	lines[lin].line = xstrdup ("~");
580	strcpy (lines[lin].line, "~");	866	lines[lin].len = 1;
		867	display[lin].line = xstrdup("");
		868	display[lin].len = 0;
		869	display[lin].buffer_size = 0;
581	lines[lin].color = GetColor (def_color);	870	lines[lin].color = GetColor (def_color);
582	}	871	}
583		872
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 (;;)	873	for (;;)
591	{	874	{
592	int need_update = 0;
593
594	/* read logs */	875	/* read logs */
595	for (current = loglist; current; current = current->next)	876	for (current = loglist; current; current = current->next)
596	{	877	{
597	if (!current->fp)	878	if (!current->fp)
598	continue; /* skip missing files */	879	continue; /* skip missing files */
599		880
600	clearerr (current->fp);	881	clearerr (current->fp);
601		882
602	while (lineinput (current) != 0)	883	while (lineinput (current))
603	{	884	{
		885	need_update = 1;
604	/* if we're trying to update old partial lines in	886	/* if we're trying to update old partial lines in
605	* place, and the last time this file was updated the	887	* place, and the last time this file was updated the
606	* output was partial, and that partial line is not	888	* output was partial, and that partial line is not
607	* too close to the top of the screen, then update	889	* too close to the top of the screen, then update
608	* that partial line */	890	* that partial line */
609	if (opt_update && current->lastpartial && current->index >= 3)	891	if (opt_update && current->lastpartial && current->index >= 0)
610	{	892	{
611	int old_len = strlen (lines[current->index].line);	893	int idx = current->index;
612	int new_len = strlen (current->buf);	894	append_line (idx, current->buf);
613	int space_on_old_line = width / font_width - old_len; //D	895	current->index = idx;
614		896	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;	897	continue;
634	}
635	}	898	}
636		899
637	/* print filename if any, and if last line was from	900	/* print filename if any, and if last line was from
638	* different file */	901	* different file */
639	if (!opt_nofilename &&
640	lastprinted != current && current->desc[0])	902	if (!opt_nofilename && lastprinted != current && current->desc[0])
641	{	903	{
642	SCROLL_UP (lines, listlen);	904	char buf[1024]; /* HACK-5 */
643	sprintf (lines[listlen - 1].line, "[%s]", current->desc);	905	snprintf (buf, sizeof (buf), "[%s]", current->desc);
644	lines[listlen - 1].color = current->color;	906	split_line (listlen - 1, buf, current->color);
645	}	907	}
646		908
		909	/* if we're dealing with partial lines, and the last
		910	* time we showed the line it wasn't finished ... */
		911	if (!opt_whole && current->lastpartial)
		912	{
647	/* if this is the same file we showed last, and the	913	/* 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 */	914	append to the last line shown */
650	if (lastprinted == current && current->lastpartial)	915	if (lastprinted == current)
651	{	916	append_line (listlen - 1, current->buf);
652	int old_len = strlen (lines[listlen - 1].line);	917	else
653	int new_len = strlen (current->buf);	918	{
654	strncat (lines[listlen - 1].line, current->buf,	919	/* but if a different file has been shown in the
655	width - old_len);	920	* mean time, make a new line, starting with the
656	/* if it doesn't all fit, then put the part that	921	* continuation string */
657	* doesn't fit on a new line */	922	split_line (listlen - 1, continuation, current->color);
658	if (new_len > width - old_len)	923	append_line (listlen - 1, current->buf);
659	{	924	}
660	SCROLL_UP (lines, listlen);	925	}
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	926	else
686	{	927	/* otherwise just make a plain and simple new line */
687	SCROLL_UP (lines, listlen);	928	split_line (listlen - 1, current->buf, current->color);
688	strcpy (lines[listlen - 1].line, current->buf);
689	}
690		929
691	/* we've shown the line now. clear the buffer for the next line */	930	free (current->buf), current->buf = 0;
692	strcpy (current->buf, "");
693	current->index = listlen - 1;	931	current->index = listlen - 1;
694	lines[listlen - 1].color = current->color;
695
696	lastprinted = current;	932	lastprinted = current;
697	need_update = 1;
698	}	933	}
699	}	934	}
700		935
701	if (need_update)	936	if (need_update)
		937	{
702	redraw ();	938	redraw (0);
		939	need_update = 0;
		940	}
703	else	941	else
704	{	942	{
705	XFlush (disp);	943	XFlush (disp);
706		944
707	if (!XPending (disp))	945	if (!XPending (disp))
…		…
733		971
734	r.x = xev.xexpose.x;	972	r.x = xev.xexpose.x;
735	r.y = xev.xexpose.y;	973	r.y = xev.xexpose.y;
736	r.width = xev.xexpose.width;	974	r.width = xev.xexpose.width;
737	r.height = xev.xexpose.height;	975	r.height = xev.xexpose.height;
		976
738	XUnionRectWithRegion (&r, region, region);	977	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	}	978	}
744	break;	979	break;
745	default:	980	default:
746	#ifdef DEBUGMODE	981	#ifdef DEBUGMODE
747	fprintf (stderr, "PANIC! Unknown event %d\n", xev.type);	982	fprintf (stderr, "PANIC! Unknown event %d\n", xev.type);
…		…
760	lastreload = time (NULL);	995	lastreload = time (NULL);
761	}	996	}
762		997
763	if (!XEmptyRegion (region))	998	if (!XEmptyRegion (region))
764	{	999	{
		1000	XRectangle r;
		1001
765	XSetRegion (disp, WinGC, region);	1002	XSetRegion (disp, WinGC, region);
		1003	XClipBox (region, &r);
766		1004
767	refresh (lines, miny, maxy);	1005	refresh (r.y, r.y + r.height, 0, 1);
		1006
768	XDestroyRegion (region);	1007	XDestroyRegion (region);
769	region = XCreateRegion ();	1008	region = XCreateRegion ();
770	maxy = 0;
771	miny = win_y + height;
772	}	1009	}
773	}	1010	}
774	}	1011	}
775		1012
776		1013
…		…
814	continuation = argv[++i];	1051	continuation = argv[++i];
815	else if (!strcmp (arg, "-font") \|\| !strcmp (arg, "-fn"))	1052	else if (!strcmp (arg, "-font") \|\| !strcmp (arg, "-fn"))
816	fontname = argv[++i];	1053	fontname = argv[++i];
817	#if HAS_REGEX	1054	#if HAS_REGEX
818	else if (!strcmp (arg, "-t"))	1055	else if (!strcmp (arg, "-t"))
		1056	{
819	transform = argv[++i];	1057	transform = argv[++i];
		1058	transform_to = argv[++i];
		1059	printf("transform: '%s' to '%s'\n", transform, transform_to);
		1060	}
820	#endif	1061	#endif
821	else if (!strcmp (arg, "-fork") \|\| !strcmp (arg, "-f"))	1062	else if (!strcmp (arg, "-fork") \|\| !strcmp (arg, "-f"))
822	opt_daemonize = 1;	1063	opt_daemonize = 1;
823	else if (!strcmp (arg, "-reload"))	1064	else if (!strcmp (arg, "-reload"))
824	{	1065	{
825	reload = atoi (argv[++i]);	1066	reload = atoi (argv[++i]);
826	command = argv[++i];	1067	command = argv[++i];
827	}	1068	}
828	else if (!strcmp (arg, "-shade"))	1069	else if (!strcmp (arg, "-shade"))
829	opt_shade = 1;	1070	opt_shade = 1;
		1071	else if (!strcmp (arg, "-outline"))
		1072	opt_outline = 1;
		1073	else if (!strcmp (arg, "-noflicker"))
		1074	opt_noflicker = 1;
830	else if (!strcmp (arg, "-frame"))	1075	else if (!strcmp (arg, "-frame"))
831	opt_frame = 1;	1076	opt_frame = 1;
832	else if (!strcmp (arg, "-no-filename"))	1077	else if (!strcmp (arg, "-no-filename"))
833	opt_nofilename = 1;	1078	opt_nofilename = 1;
834	else if (!strcmp (arg, "-reverse"))	1079	else if (!strcmp (arg, "-reverse"))
…		…
837	opt_whole = 1;	1082	opt_whole = 1;
838	else if (!strcmp (arg, "-partial"))	1083	else if (!strcmp (arg, "-partial"))
839	opt_partial = 1;	1084	opt_partial = 1;
840	else if (!strcmp (arg, "-update"))	1085	else if (!strcmp (arg, "-update"))
841	opt_update = opt_partial = 1;	1086	opt_update = opt_partial = 1;
		1087	else if (!strcmp (arg, "-wordwrap"))
		1088	opt_wordwrap = 1;
842	else if (!strcmp (arg, "-color"))	1089	else if (!strcmp (arg, "-color"))
843	def_color = argv[++i];	1090	def_color = argv[++i];
844	else if (!strcmp (arg, "-noinitial"))	1091	else if (!strcmp (arg, "-noinitial"))
845	opt_noinitial = 1;	1092	opt_noinitial = 1;
846	else if (!strcmp (arg, "-id"))	1093	else if (!strcmp (arg, "-id"))
…		…
880	desc = p + 1;	1127	desc = p + 1;
881	}	1128	}
882	}	1129	}
883		1130
884	e = xmalloc (sizeof (struct logfile_entry));	1131	e = xmalloc (sizeof (struct logfile_entry));
		1132	e->partial = 0;
		1133	e->buf = 0;
		1134	e->index = -1;
		1135
885	if (arg[0] == '-' && arg[1] == '\0')	1136	if (arg[0] == '-' && arg[1] == '\0')
886	{	1137	{
887	if ((e->fp = fdopen (0, "r")) == NULL)	1138	if ((e->fp = fdopen (0, "r")) == NULL)
888	perror ("fdopen"), exit (1);	1139	perror ("fdopen"), exit (1);
889	if (fcntl (0, F_SETFL, O_NONBLOCK) < 0)	1140	if (fcntl (0, F_SETFL, O_NONBLOCK) < 0)
890	perror ("fcntl"), exit (1);	1141	perror ("fcntl"), exit (1);
		1142
891	e->fname = NULL;	1143	e->fname = NULL;
892	e->inode = 0;	1144	e->inode = 0;
893	e->desc = xstrdup ("stdin");	1145	e->desc = xstrdup ("stdin");
894	}	1146	}
895	else	1147	else
896	{	1148	{
897	int l;
898
899	e->fname = xstrdup (fname);	1149	e->fname = xstrdup (fname);
		1150
900	if (openlog (e) == NULL)	1151	if (openlog (e) == NULL)
901	perror (fname), exit (1);	1152	perror (fname), exit (1);
902		1153
903	l = strlen (desc);	1154	e->desc = xstrdup (desc);
904	if (l > width - 2) /* must account for [ ] */
905	l = width - 2;
906	e->desc = xmalloc (l + 1);
907	memcpy (e->desc, desc, l);
908	*(e->desc + l) = '\0';
909	}	1155	}
910		1156
911	e->color = GetColor (fcolor);	1157	e->color = GetColor (fcolor);
912	e->buf = xmalloc (width + 2);
913	e->partial = 0;	1158	e->partial = 0;
914	e->buf[0] = '\0';
915	e->next = NULL;	1159	e->next = NULL;
916		1160
917	if (!loglist)	1161	if (!loglist)
918	loglist = e;	1162	loglist = e;
919	if (loglist_tail)	1163	if (loglist_tail)
920	loglist_tail->next = e;	1164	loglist_tail->next = e;
		1165
921	loglist_tail = e;	1166	loglist_tail = e;
922	}	1167	}
923	}	1168	}
924		1169
925	if (!loglist)	1170	if (!loglist)
…		…
930	}	1175	}
931		1176
932	if (opt_partial && opt_whole)	1177	if (opt_partial && opt_whole)
933	{	1178	{
934	fprintf (stderr, "Specify at most one of -partial and -whole\n");	1179	fprintf (stderr, "Specify at most one of -partial and -whole\n");
		1180	exit (1);
		1181	}
		1182
		1183	/* HACK-7: do we want to allow both -shade and -outline? */
		1184	if (opt_shade && opt_outline)
		1185	{
		1186	fprintf (stderr, "Specify at most one of -shade and -outline\n");
935	exit (1);	1187	exit (1);
936	}	1188	}
937		1189
938	if (opt_partial)	1190	if (opt_partial)
939	/* if we specifically requested to see partial lines then don't insist on whole lines */	1191	/* if we specifically requested to see partial lines then don't insist on whole lines */
940	opt_whole = 0;	1192	opt_whole = 0;
941	else if (file_count > 1)	1193	else if (file_count > 1)
942	/* otherwise, if we've viewing multiple files, default to showing whole lines */	1194	/* otherwise, if we're viewing multiple files, default to showing whole lines */
943	opt_whole = 1;	1195	opt_whole = 1;
944		1196
945	#if HAS_REGEX	1197	#if HAS_REGEX
946	if (transform)	1198	if (transform)
947	{	1199	{
948	int i;	1200	int i;
949		1201
		1202	printf("compiling regexp '%s'\n", transform);
950	transformre = xmalloc (sizeof (transformre));	1203	transformre = xmalloc (sizeof (regex_t));
951	i = regcomp (&transformre, transform, REG_EXTENDED);	1204	i = regcomp (transformre, transform, REG_EXTENDED);
952	if (i != 0)	1205	if (i != 0)
953	{	1206	{
954	char buf[512];	1207	char buf[512];
955		1208
956	regerror (i, &transformre, buf, sizeof (buf));	1209	regerror (i, transformre, buf, sizeof (buf));
957	fprintf (stderr, "Cannot compile regular expression: %s\n", buf);	1210	fprintf (stderr, "Cannot compile regular expression: %s\n", buf);
958	}	1211	}
		1212	else
		1213	{
		1214	printf("compiled '%s' OK to %x\n", transform, (int)transformre);
		1215	}
959	}	1216	}
960	#endif	1217	#endif
961		1218
962	InitWindow ();	1219	InitWindow ();
963		1220
…		…
1011	while ((p = malloc (size)) == NULL)	1268	while ((p = malloc (size)) == NULL)
1012	{	1269	{
1013	fprintf (stderr, "Memory exausted.");	1270	fprintf (stderr, "Memory exausted.");
1014	sleep (10);	1271	sleep (10);
1015	}	1272	}
		1273
		1274	return p;
		1275	}
		1276
		1277	void *
		1278	xrealloc (void *ptr, size_t size)
		1279	{
		1280	void *p;
		1281
		1282	while ((p = realloc (ptr, size)) == NULL)
		1283	{
		1284	fprintf (stderr, "Memory exausted.");
		1285	sleep (10);
		1286	}
		1287
1016	return p;	1288	return p;
1017	}	1289	}
1018		1290
1019	void	1291	void
1020	display_help (char *myname)	1292	display_help (char *myname)
…		…
1030	" -reverse print new lines at the top\n"	1302	" -reverse print new lines at the top\n"
1031	" -whole wait for \\n before showing a line\n"	1303	" -whole wait for \\n before showing a line\n"
1032	" -partial show lines even if they don't end with a \\n\n"	1304	" -partial show lines even if they don't end with a \\n\n"
1033	" -update allow updates to old partial lines\n"	1305	" -update allow updates to old partial lines\n"
1034	" -cont string to prefix continued partial lines with\n"	1306	" -cont string to prefix continued partial lines with\n"
		1307	" -wordwrap wrap long lines at spaces to avoid breaking words\n"
1035	" defaults to \"[+]\"\n"	1308	" defaults to \"[+]\"\n"
1036	" -shade add shading to font\n"	1309	" -shade add shading to font\n"
1037	" -noinitial don't display the last file lines on\n"	1310	" -noinitial don't display the last file lines on\n"
1038	" startup\n"	1311	" startup\n"
1039	" -i \| -interval seconds interval between checks (fractional\n"	1312	" -i \| -interval seconds interval between checks (fractional\n"
1040	" values o.k.). Default 3 seconds\n"	1313	" values o.k.). Default 2.4 seconds\n"
1041	" -V display version information and exit\n"	1314	" -V display version information and exit\n"
1042	"\n");	1315	"\n");
1043	printf ("Example:\n%s -g 80x25+100+50 -font fixed /var/log/messages,green "	1316	printf ("Example:\n%s -g 80x25+100+50 -font fixed /var/log/messages,green "
1044	"/var/log/secure,red,'ALERT'\n", myname);	1317	"/var/log/secure,red,'ALERT'\n", myname);
1045	exit (0);	1318	exit (0);
…		…
1053	}	1326	}
1054		1327
1055	int	1328	int
1056	daemonize (void)	1329	daemonize (void)
1057	{	1330	{
		1331	pid_t pid;
		1332
1058	switch (fork ())	1333	switch (pid = fork ())
1059	{	1334	{
1060	case -1:	1335	case -1:
1061	return -1;	1336	return -1;
1062	case 0:	1337	case 0:
1063	break;	1338	break;
1064	default:	1339	default:
		1340	/printf("%d\n", pid);/
1065	_exit (0);	1341	exit (0);
1066	}	1342	}
1067		1343
1068	if (setsid () == -1)	1344	if (setsid () == -1)
1069	return -1;	1345	return -1;
1070		1346

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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 1.39 by pcg, Wed Mar 31 01:59:19 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 1.39 by pcg, Wed Mar 31 01:59:19 2004 UTC