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Comparing root-tail/root-tail.c (file contents):
Revision 1.3 by pcg, Sun May 5 19:10:39 2002 UTC vs.
Revision 1.43 by chris_moore, Wed Mar 31 17:07:02 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.
…		…
28	#include <fcntl.h>	31	#include <fcntl.h>
29	#include <errno.h>	32	#include <errno.h>
30	#include <sys/time.h>	33	#include <sys/time.h>
31	#include <sys/stat.h>	34	#include <sys/stat.h>
32	#include <sys/types.h>	35	#include <sys/types.h>
		36	#include <locale.h>
		37	#include <ctype.h>
		38	#include <stdarg.h>
		39	#include <X11/Xlib.h>
		40	#include <X11/Xatom.h>
		41	#include <X11/Xutil.h>
		42
33	#if HAS_REGEX	43	#if HAS_REGEX
34	#include <regex.h>	44	#include <regex.h>
35	#endif	45	#endif
36	#include <X11/Xlib.h>	46
37	#include <X11/Xutil.h>	47	#define SHADE_X 2
		48	#define SHADE_Y 2
38		49
39	/* data structures */	50	/* data structures */
40	struct logfile_entry {	51	struct logfile_entry
41	char *fname; /* name of file */	52	{
42	char *desc; /* alternative description */
43	FILE *fp; /* FILE struct associated with file */
44	ino_t inode; /* inode of the file opened */
45	off_t last_size; /* file size at the last check */
46	unsigned long color; /* color to be used for printing */
47	struct logfile_entry *next;	53	struct logfile_entry *next;
		54
		55	char *fname; /* name of file */
		56	char *desc; /* alternative description */
		57	char *buf; /* text read but not yet displayed */
		58	FILE *fp; /* FILE struct associated with file */
		59	ino_t inode; /* inode of the file opened */
		60	off_t last_size; /* file size at the last check */
		61	unsigned long color; /* color to be used for printing */
		62	int partial; /* true if the last line isn't complete */
		63	int lastpartial; /* true if the previous output wasn't complete */
		64	int index; /* index into linematrix of a partial line */
		65	int modified; /* true if line is modified & needs displaying */
48	};	66	};
49		67
50	struct linematrix {	68	struct linematrix
		69	{
51	char *line;	70	char *line;
		71	int len;
52	unsigned long color;	72	unsigned long color;
53	};	73	};
54		74
		75	struct displaymatrix
		76	{
		77	char *line;
		78	int len;
		79	int buffer_size;
		80	unsigned long color;
		81	};
55		82
56	/* global variables */	83	/* global variables */
57	unsigned int width = STD_WIDTH, listlen = STD_HEIGHT;	84	struct linematrix *lines;
		85	struct displaymatrix *display;
		86	int width = STD_WIDTH, height = STD_HEIGHT, listlen;
58	int win_x = LOC_X, win_y = LOC_Y;	87	int win_x = LOC_X, win_y = LOC_Y;
59	int w = -1, h = -1, font_width, font_height, font_descent;	88	int font_ascent, font_height;
		89	int effect_x_space, effect_y_space; /* how much space does shading / outlining take up */
		90	int effect_x_offset, effect_y_offset; /* and how does it offset the usable space */
60	int do_reopen;	91	int do_reopen;
61	struct timeval interval = { 2, 400000 }; /* see Knuth */	92	struct timeval interval = { 2, 400000 };
		93	XFontSet fontset;
62		94
63	/* command line options */	95	/* command line options */
64	int opt_noinitial, opt_shade, opt_frame, opt_reverse=0, opt_nofilename,	96	int opt_noinitial, opt_shade, opt_frame, opt_reverse, opt_nofilename,
		97	opt_outline, opt_noflicker, opt_whole, opt_update, opt_wordwrap,
65	geom_mask, reload = 3600;	98	geom_mask, reload = 0;
66	const char *command = NULL,	99	const char *command = NULL,
67	*fontname = USE_FONT, *dispname = NULL, *def_color = DEF_COLOR;	100	*fontname = USE_FONT, *dispname = NULL, *def_color = DEF_COLOR,
		101	*continuation = "[+]";
68		102
69	struct logfile_entry *loglist = NULL, *loglist_tail = NULL;	103	struct logfile_entry *loglist = NULL, *loglist_tail = NULL;
70		104
71	Display *disp;	105	Display *disp;
72	Window root;	106	Window root;
73	GC WinGC;	107	GC WinGC;
74		108
75	#if HAS_REGEX	109	#if HAS_REGEX
76	struct re_list {	110	struct re_list
		111	{
77	regex_t from;	112	regex_t from;
78	const char *to;	113	const char *to;
79	struct re_list *next;	114	struct re_list *next;
80	};	115	};
81	struct re_list *re_head, *re_tail;	116	struct re_list *re_head, *re_tail;
		117	char *transform_to = NULL;
		118	regex_t *transformre;
82	#endif	119	#endif
83		120
84		121
85	/* prototypes */	122	/* prototypes */
86	void list_files(int);	123	void list_files (int);
87	void force_reopen(int);	124	void force_reopen (int);
88	void force_refresh(int);	125	void force_refresh (int);
89	void blank_window(int);	126	void blank_window (int);
90		127
91	void InitWindow(void);	128	void InitWindow (void);
92	unsigned long GetColor(const char *);	129	unsigned long GetColor (const char *);
93	void redraw(void);	130	void redraw (int);
94	void refresh(struct linematrix *, int, int);	131	void refresh (int, int, int, int);
95		132
96	void transform_line(char *s);	133	void transform_line (char *s);
97	int lineinput(char *, int, FILE *);	134	int lineinput (struct logfile_entry *);
98	void reopen(void);	135	void reopen (void);
99	void check_open_files(void);	136	void check_open_files (void);
100	FILE *openlog(struct logfile_entry *);	137	FILE *openlog (struct logfile_entry *);
101	void main_loop(void);	138	static void main_loop (void);
102		139
103	void display_version(void);	140	void display_version (void);
104	void display_help(char *);	141	void display_help (char *);
105	void install_signal(int, void (*)(int));	142	void install_signal (int, void (*)(int));
106	void *xstrdup(const char *);	143	void *xstrdup (const char *);
107	void *xmalloc(size_t);	144	void *xmalloc (size_t);
		145	void *xrealloc (void *, size_t);
108	int daemonize(void);	146	int daemonize (void);
109		147
110	/* signal handlers */	148	/* signal handlers */
		149	void
111	void list_files(int dummy)	150	list_files (int dummy)
112	{	151	{
113	struct logfile_entry *e;	152	struct logfile_entry *e;
114		153
115	fprintf(stderr, "Files opened:\n");	154	fprintf (stderr, "Files opened:\n");
116	for (e = loglist; e; e = e->next)	155	for (e = loglist; e; e = e->next)
117	fprintf(stderr, "\t%s (%s)\n", e->fname, e->desc);	156	fprintf (stderr, "\t%s (%s)\n", e->fname, e->desc);
118	}	157	}
119		158
		159	void
120	void force_reopen(int dummy)	160	force_reopen (int dummy)
121	{	161	{
122	do_reopen = 1;	162	do_reopen = 1;
123	}	163	}
124		164
		165	void
125	void force_refresh(int dummy)	166	force_refresh (int dummy)
126	{	167	{
127	XClearWindow(disp, root);
128	redraw();	168	redraw (1);
129	}	169	}
130		170
		171	void
131	void blank_window(int dummy)	172	blank_window (int dummy)
132	{	173	{
133	XClearWindow(disp, root);	174	XClearArea (disp, root, win_x - 2, win_y - 2, width + 5, height + 5, False);
134	XFlush(disp);	175	XFlush (disp);
135	exit(0);	176	exit (0);
136	}	177	}
137		178
138	/* X related functions */	179	/* X related functions */
		180	unsigned long
139	unsigned long GetColor(const char *ColorName)	181	GetColor (const char *ColorName)
140	{	182	{
141	XColor Color;	183	XColor Color;
142	XWindowAttributes Attributes;	184	XWindowAttributes Attributes;
143		185
144	XGetWindowAttributes(disp, root, &Attributes);	186	XGetWindowAttributes (disp, root, &Attributes);
145	Color.pixel = 0;	187	Color.pixel = 0;
		188
146	if (!XParseColor(disp, Attributes.colormap, ColorName, &Color))	189	if (!XParseColor (disp, Attributes.colormap, ColorName, &Color))
147	fprintf(stderr, "can't parse %s\n", ColorName);	190	fprintf (stderr, "can't parse %s\n", ColorName);
148	else if (!XAllocColor(disp, Attributes.colormap, &Color))	191	else if (!XAllocColor (disp, Attributes.colormap, &Color))
149	fprintf(stderr, "can't allocate %s\n", ColorName);	192	fprintf (stderr, "can't allocate %s\n", ColorName);
		193
150	return Color.pixel;	194	return Color.pixel;
151	}	195	}
152		196
153	void InitWindow(void)	197	static Window
		198	root_window (Display * display, int screen_number)
154	{	199	{
155	XGCValues gcv;	200	Atom SWM_VROOT = XInternAtom (display, "__SWM_VROOT", False);
156	Font font;	201	Window real_root_window = RootWindow (display, screen_number);
157	unsigned long gcm;
158	XFontStruct *info;
159	int screen, ScreenWidth, ScreenHeight;
160		202
161	if (!(disp = XOpenDisplay(dispname))) {	203	if (root) /* root window set via option */
162	fprintf(stderr, "Can't open display %s.\n", dispname);	204	return root;
163	exit(1);	205
		206	if (SWM_VROOT != None)
164	}	207	{
165	screen = DefaultScreen(disp);	208	Window unused, *windows;
166	ScreenHeight = DisplayHeight(disp, screen);	209	unsigned int count;
167	ScreenWidth = DisplayWidth(disp, screen);
168	root = RootWindow(disp, screen);
169	gcm = GCBackground;
170	gcv.graphics_exposures = True;
171	WinGC = XCreateGC(disp, root, gcm, &gcv);
172	XMapWindow(disp, root);
173	XSetForeground(disp, WinGC, GetColor(DEF_COLOR));
174		210
175	font = XLoadFont(disp, fontname);	211	if (XQueryTree (display, real_root_window, &unused, &unused, &windows,
176	XSetFont(disp, WinGC, font);	212	&count))
177	info = XQueryFont(disp, font);
178	font_width = info->max_bounds.width;
179	font_descent = info->max_bounds.descent;
180	font_height = info->max_bounds.ascent + font_descent;
181
182	w = width * font_width;
183	h = listlen * font_height;
184	if (geom_mask & XNegative)
185	win_x = win_x + ScreenWidth - w;
186	if (geom_mask & YNegative)
187	win_y = win_y + ScreenHeight - h;
188
189	XSelectInput(disp, root, ExposureMask|FocusChangeMask);
190	}
191
192	char *
193	detabificate (char *s)
194	{
195	char * out;
196	int i, j;
197
198	out = malloc (8 * strlen (s) + 1);
199
200	for(i = 0, j = 0; s[i]; i++)
201	{
202	if (s[i] == '\t')
203	do	213	{
204	out[j++] = ' ';	214	int i;
205	while (j % 8);	215
		216	for (i = 0; i < count; i++)
		217	{
		218	Atom type;
		219	int format;
		220	unsigned long nitems, bytes_after_return;
		221	unsigned char *virtual_root_window;
		222
		223	if (XGetWindowProperty (display, windows[i], SWM_VROOT,
		224	0, 1, False, XA_WINDOW, &type, &format,
		225	&nitems, &bytes_after_return,
		226	&virtual_root_window) == Success)
		227	{
		228	if (type != None)
		229	{
		230	if (type == XA_WINDOW)
		231	{
		232	XFree (windows);
		233	return (Window) virtual_root_window;
		234	}
		235	else
		236	fprintf (stderr,
		237	"__SWM_VROOT property type mismatch");
		238	}
		239	}
		240	else
		241	fprintf (stderr,
		242	"failed to get __SWM_VROOT property on window 0x%lx",
		243	windows[i]);
		244	}
		245
		246	if (count)
		247	XFree (windows);
		248	}
206	else	249	else
207	out[j++] = s[i];	250	fprintf (stderr, "Can't query tree on root window 0x%lx",
		251	real_root_window);
		252	}
		253	else
		254	/* This shouldn't happen. The Xlib documentation is wrong BTW. */
		255	fprintf (stderr, "Can't intern atom __SWM_VROOT");
		256
		257	return real_root_window;
		258	}
		259
		260	void
		261	InitWindow (void)
		262	{
		263	XGCValues gcv;
		264	unsigned long gcm;
		265	int screen, ScreenWidth, ScreenHeight;
		266
		267	if (!(disp = XOpenDisplay (dispname)))
		268	{
		269	fprintf (stderr, "Can't open display %s.\n", dispname);
		270	exit (1);
		271	}
		272
		273	screen = DefaultScreen (disp);
		274	ScreenHeight = DisplayHeight (disp, screen);
		275	ScreenWidth = DisplayWidth (disp, screen);
		276
		277	root = root_window (disp, screen);
		278
		279	gcm = GCBackground;
		280	gcv.graphics_exposures = True;
		281	WinGC = XCreateGC (disp, root, gcm, &gcv);
		282	XMapWindow (disp, root);
		283	XSetForeground (disp, WinGC, GetColor (DEF_COLOR));
		284
		285	{
		286	char **missing_charset_list;
		287	int missing_charset_count;
		288	char *def_string;
		289
		290	fontset = XCreateFontSet (disp, fontname,
		291	&missing_charset_list, &missing_charset_count,
		292	&def_string);
		293
		294	if (missing_charset_count)
		295	{
		296	fprintf (stderr,
		297	"Missing charsets in String to FontSet conversion (%s)\n",
		298	missing_charset_list[0]);
		299	XFreeStringList (missing_charset_list);
208	}	300	}
		301	}
		302
		303	if (!fontset)
		304	{
		305	fprintf (stderr, "unable to create fontset, exiting.\n");
		306	exit (1);
		307	}
		308
		309	{
		310	XFontSetExtents *xfe = XExtentsOfFontSet (fontset);
		311
		312	font_height = xfe->max_logical_extent.height;
		313	font_ascent = -xfe->max_logical_extent.y;
		314	}
		315
		316	if (geom_mask & XNegative)
		317	win_x = win_x + ScreenWidth - width;
		318	if (geom_mask & YNegative)
		319	win_y = win_y + ScreenHeight - height;
		320
		321	if (opt_outline)
		322	{
		323	/* adding outline increases the total width and height by 2
		324	pixels each, and offsets the text one pixel right and one
		325	pixel down */
		326	effect_x_space = effect_y_space = 2;
		327	effect_x_offset = effect_y_offset = 1;
		328	}
		329	else if (opt_shade)
		330	{
		331	/* adding a shadow increases the space used */
		332	effect_x_space = abs(SHADE_X);
		333	effect_y_space = abs(SHADE_Y);
		334	/* if the shadow is to the right and below then we don't need
		335	* to move the text to make space for it, but shadows to the left
		336	* and above need accomodating */
		337	effect_x_offset = SHADE_X > 0 ? 0 : -SHADE_X;
		338	effect_y_offset = SHADE_Y > 0 ? 0 : -SHADE_Y;
		339	}
		340	else
		341	{
		342	effect_x_space = effect_y_space = 0;
		343	effect_x_offset = effect_y_offset = 0;
		344	}
		345
		346	/* if we are using -shade or -outline, there will be less usable
		347	* space for output */
		348	listlen = (height - effect_y_space) / font_height;
		349
		350	if (!listlen)
		351	{
		352	fprintf (stderr, "height too small for a single line, setting to %d\n",
		353	font_height);
		354	listlen = 1;
		355	}
		356
		357	/* leave the height how the user requested it. it might not all be
		358	* used, but this will allow the geometry to be tuned more accurately
		359	* (with the -frame option)
		360	* the old code did this:
		361	* height = listlen * font_height + effect_y_space; */
209		362
210	out[j] = '\0';	363	XSelectInput (disp, root, ExposureMask | FocusChangeMask);
211	return out;
212	}	364	}
213		365
214	/*	366	/*
215	* redraw does a complete redraw, rather than an update (i.e. the area	367	* if redraw() is passwd a non-zero argument, it does a complete
216	* gets cleared first)	368	* redraw, rather than an update. if the argument is zero (and
		369	* -noflicker is in effect) then only the lines which have changed
		370	* since the last draw are redrawn.
		371	*
217	* the rest is handled by regular refresh()'es	372	* the rest is handled by regular refresh()'es
218	*/	373	*/
219	void redraw(void)	374	void
		375	redraw (int redraw_all)
220	{	376	{
221	XClearArea(disp, root, win_x, win_y, w, h + font_descent + 2, True);	377	XSetClipMask (disp, WinGC, None);
		378	refresh (0, 32768, 1, redraw_all);
222	}	379	}
223		380
224	/* Just redraw everything without clearing (i.e. after an EXPOSE event) */	381	/* Just redraw everything without clearing (i.e. after an EXPOSE event) */
225	void refresh(struct linematrix *lines, int miny, int maxy)	382	void
		383	refresh (int miny, int maxy, int clear, int refresh_all)
226	{	384	{
227	int lin;	385	int lin;
228	int offset = (listlen + 1) * font_height;	386	int offset = listlen * font_height + font_ascent + effect_y_offset;
229	unsigned long black_color = GetColor("black");	387	unsigned long black_color = GetColor ("black");
230		388
231	miny -= win_y + font_height;	389	miny -= win_y + font_height;
232	maxy -= win_y - font_height;	390	maxy -= win_y - font_height;
233		391
		392	if (clear && !opt_noflicker)
		393	XClearArea (disp, root, win_x, win_y, width, height, False);
		394
234	for (lin = listlen; lin--;)	395	for (lin = listlen; lin--;)
		396	{
		397	struct linematrix *line = lines + (opt_reverse ? listlen - lin - 1 : lin);
		398	struct displaymatrix *display_line = display + lin;
		399
		400	offset -= font_height;
		401
		402	if (offset < miny || offset > maxy)
		403	continue;
		404
		405	/* if this line is a different than it was, then it
		406	* needs displaying */
		407	if (!opt_noflicker
		408	|| refresh_all
		409	|| display_line->len != line->len
		410	|| display_line->color != line->color
		411	|| memcmp (display_line->line, line->line, line->len))
235	{	412	{
236	char *temp;	413	/* don't bother updating the record of what has been
		414	* displayed if -noflicker isn't in effect, since we redraw
		415	* the whole display every time anyway */
		416	if (opt_noflicker)
		417	{
		418	/* update the record of what has been displayed;
		419	* first make sure the buffer is big enough */
		420	if (display_line->buffer_size <= line->len)
		421	{
		422	display_line->buffer_size = line->len;
		423	display_line->line = xrealloc (display_line->line, display_line->buffer_size);
		424	}
		425
		426	display_line->len = line->len;
		427	display_line->color = line->color;
		428	memcpy (display_line->line, line->line, line->len);
		429
		430	if (clear)
		431	XClearArea (disp, root, win_x, win_y + offset - font_ascent,
		432	width + effect_x_space, font_height + effect_y_space, False);
		433	}
		434
		435	if (opt_outline)
		436	{
		437	int x, y;
		438	XSetForeground (disp, WinGC, black_color);
		439
		440	for (x = -1; x <= 1; x += 2)
		441	for (y = -1; y <= 1; y += 2)
		442	XmbDrawString (disp, root, fontset, WinGC,
		443	win_x + effect_x_offset + x,
		444	win_y + y + offset,
		445	line->line, line->len);
		446	}
		447	else if (opt_shade)
		448	{
		449	XSetForeground (disp, WinGC, black_color);
		450	XmbDrawString (disp, root, fontset, WinGC,
		451	win_x + effect_x_offset + SHADE_X,
		452	win_y + offset + SHADE_Y,
		453	line->line, line->len);
		454	}
		455
		456	XSetForeground (disp, WinGC, line->color);
		457	XmbDrawString (disp, root, fontset, WinGC,
		458	win_x + effect_x_offset,
		459	win_y + offset,
		460	line->line, line->len);
		461	}
		462	}
		463
		464	if (opt_frame)
		465	{
		466	XSetForeground (disp, WinGC, GetColor (def_color));
		467	XDrawRectangle (disp, root, WinGC, win_x - 0, win_y - 0, width - 1, height - 1);
		468	}
		469	}
		470
		471	#if HAS_REGEX
		472	void
		473	transform_line (char *s)
		474	{
		475	#ifdef I_AM_Md
		476	int i;
		477	if (1)
		478	{
		479	for (i = 16; s[i]; i++)
		480	s[i] = s[i + 11];
		481	}
		482	s[i + 1] = '\0';
		483	#endif
		484
		485	if (transformre)
		486	{
		487	int i;
		488	regmatch_t matched[16];
		489
		490	i = regexec (transformre, s, 16, matched, 0);
		491	if (i == 0)
		492	{ /* matched */
		493	int match_start = matched[0].rm_so;
		494	int match_end = matched[0].rm_eo;
		495	int old_len = match_end - match_start;
		496	int new_len = strlen (transform_to);
		497	int old_whole_len = strlen (s);
		498
		499	printf ("regexp was matched by '%s' - replace with '%s'\n", s, transform_to);
		500	printf ("match is from %d to %d\n", match_start, match_end);
		501	if (new_len > old_len)
		502	s = xrealloc(s, old_whole_len + new_len - old_len);
		503
		504	if (new_len != old_len)
		505	{
		506	memcpy(s + match_end + new_len - old_len,
		507	s + match_end,
		508	old_whole_len - match_end);
		509	s[old_whole_len + new_len - old_len] = '\0';
		510	}
		511
		512	memcpy (s + match_start,
		513	transform_to,
		514	new_len);
		515	printf ("transformed to '%s'\n", s);
		516	}
		517	else
		518	{
		519	printf ("regexp was not matched by '%s'\n", s);
		520	}
		521	}
		522	}
		523	#endif
		524
		525	char *
		526	concat_line (const char *p1, const char *p2)
		527	{
		528	int l1 = p1 ? strlen (p1) : 0;
		529	int l2 = strlen (p2);
		530	char *r = xmalloc (l1 + l2 + 1);
		531
		532	memcpy (r, p1, l1);
		533	memcpy (r + l1, p2, l2);
		534	r[l1 + l2] = 0;
		535
		536	return r;
		537	}
		538
		539	/*
		540	* This routine can read a line of any length if it is called enough times.
		541	*/
		542	int
		543	lineinput (struct logfile_entry *logfile)
		544	{
		545	char buff[1024], *p = buff;
		546	int ch;
		547	/* HACK-2: add on the length of any partial line which we will be appending to */
		548	int ofs = logfile->buf ? strlen (logfile->buf) : 0;
		549
		550	do
		551	{
		552	ch = fgetc (logfile->fp);
		553
		554	if (ch == '\n' || ch == EOF)
		555	break;
		556	else if (ch == '\r')
		557	continue; /* skip */
		558	else if (ch == '\t')
		559	{
		560	do
		561	{
		562	*p++ = ' ';
		563	ofs++;
		564	}
		565	while (ofs & 7);
		566	}
		567	else
		568	{
		569	*p++ = ch;
		570	ofs++;
		571	}
		572	}
		573	while (p < buff + (sizeof buff) - 8 - 1);
		574
		575	if (p == buff && ch == EOF)
		576	return 0;
		577
		578	*p = 0;
		579
		580	p = concat_line (logfile->buf, buff);
		581	free (logfile->buf); logfile->buf = p;
		582
		583	logfile->lastpartial = logfile->partial;
		584	/* there are 3 ways we could have exited the loop: reading '\n',
		585	* reaching EOF, or filling the buffer; the 2nd and 3rd of these
		586	* both result in a partial line */
		587	logfile->partial = ch != '\n';
237		588
238	offset -= font_height;	589	if (logfile->partial && opt_whole)
239		590	return 0;
240	if (offset < miny || offset > maxy)
241	continue;
242
243	if (opt_reverse)
244	temp = detabificate (lines[listlen-lin-1].line);
245	else
246	temp = detabificate (lines[lin].line);
247
248	if (opt_shade)
249	{
250	XSetForeground (disp, WinGC, black_color);
251	XDrawString (disp, root, WinGC, win_x + 2, win_y + offset + 2,
252	temp, strlen (temp));
253	}
254
255	XSetForeground (disp, WinGC, lines[lin].color);
256	XDrawString (disp, root, WinGC, win_x, win_y + offset,
257	temp, strlen (temp));
258
259	free (temp);
260	}
261
262	if (opt_frame) {
263	int bot_y = win_y + h + font_descent + 2;
264
265	XDrawLine(disp, root, WinGC, win_x, win_y, win_x + w, win_y);
266	XDrawLine(disp, root, WinGC, win_x + w, win_y, win_x + w, bot_y);
267	XDrawLine(disp, root, WinGC, win_x + w, bot_y, win_x, bot_y);
268	XDrawLine(disp, root, WinGC, win_x, bot_y, win_x, win_y);
269	}
270	}
271		591
272	#if HAS_REGEX	592	#if HAS_REGEX
273	void transform_line(char *s)	593	transform_line (logfile->buf);
274	{
275	#ifdef I_AM_Md
276	int i;
277	if (1) {
278	for (i = 16; s[i]; i++)
279	s[i] = s[i + 11];
280	}
281	s[i + 1] = '\0';
282	#endif	594	#endif
283
284	if (transformre) {
285	int i;
286	regmatch_t matched[16];
287
288	i = regexec(&transformre, string, 16, matched, 0);
289	if (i == 0) { /* matched */
290	}
291	}
292	}
293	#endif
294
295
296	/*
297	* This routine should read 'width' characters and not more. However,
298	* we really want to read width + 1 charachters if the last char is a '\n',
299	* which we should remove afterwards. So, read width+1 chars and ungetc
300	* the last character if it's not a newline. This means 'string' must be
301	* width + 2 wide!
302	*/
303	int lineinput(char *string, int slen, FILE *f)
304	{
305	int len;
306
307	do {
308	if (fgets(string, slen, f) == NULL) /* EOF or Error */
309	return 0;	595	return 1;
310
311	len = strlen(string);
312	} while (len == 0);
313
314	if (string[len - 1] == '\n')
315	string[len - 1] = '\0'; /* erase newline */
316	else if (len >= slen - 1) {
317	ungetc(string[len - 1], f);
318	string[len - 1] = '\0';
319	}
320
321	#if HAS_REGEX
322	transform_line(string);
323	#endif
324	return len;
325	}	596	}
326		597
327	/* input: reads file->fname	598	/* input: reads file->fname
328	* output: fills file->fp, file->inode	599	* output: fills file->fp, file->inode
329	* returns file->fp	600	* returns file->fp
330	* in case of error, file->fp is NULL	601	* in case of error, file->fp is NULL
331	*/	602	*/
		603	FILE *
332	FILE *openlog(struct logfile_entry *file)	604	openlog (struct logfile_entry * file)
333	{	605	{
334	struct stat stats;	606	struct stat stats;
335		607
336	if ((file->fp = fopen(file->fname, "r")) == NULL) {	608	if ((file->fp = fopen (file->fname, "r")) == NULL)
		609	{
337	file->fp = NULL;	610	file->fp = NULL;
338	return NULL;	611	return NULL;
339	}	612	}
340		613
341	fstat(fileno(file->fp), &stats);	614	fstat (fileno (file->fp), &stats);
342	if (S_ISFIFO(stats.st_mode)) {	615	if (S_ISFIFO (stats.st_mode))
		616	{
343	if (fcntl(fileno(file->fp), F_SETFL, O_NONBLOCK) < 0)	617	if (fcntl (fileno (file->fp), F_SETFL, O_NONBLOCK) < 0)
344	perror("fcntl"), exit(1);	618	perror ("fcntl"), exit (1);
345	file->inode = 0;	619	file->inode = 0;
		620	}
346	} else	621	else
347	file->inode = stats.st_ino;	622	file->inode = stats.st_ino;
348		623
349	if (opt_noinitial)	624	if (opt_noinitial)
350	fseek (file->fp, 0, SEEK_END);	625	fseek (file->fp, 0, SEEK_END);
351	else if (stats.st_size > (listlen + 1) * width)	626	else if (stats.st_size > (listlen + 1) * width)
		627	fseek (file->fp, -((listlen + 2) * width), SEEK_END);
		628
		629	file->last_size = stats.st_size;
		630	return file->fp;
		631	}
		632
		633	void
		634	reopen (void)
		635	{
		636	struct logfile_entry *e;
		637
		638	for (e = loglist; e; e = e->next)
		639	{
		640	if (!e->inode)
		641	continue; /* skip stdin */
		642
		643	if (e->fp)
		644	fclose (e->fp);
		645	/* if fp is NULL we will try again later */
		646	openlog (e);
		647	}
		648
		649	do_reopen = 0;
		650	}
		651
		652	void
		653	check_open_files (void)
		654	{
		655	struct logfile_entry *e;
		656	struct stat stats;
		657
		658	for (e = loglist; e; e = e->next)
		659	{
		660	if (!e->inode)
		661	continue; /* skip stdin */
		662
		663	if (stat (e->fname, &stats) < 0)
		664	{ /* file missing? */
		665	sleep (1);
		666	if (e->fp)
		667	fclose (e->fp);
		668	if (openlog (e) == NULL)
		669	continue;
		670	if (fstat (fileno (e->fp), &stats) < 0)
		671	continue;
		672	}
		673
		674	if (stats.st_ino != e->inode)
		675	{ /* file renamed? */
		676	if (e->fp)
		677	fclose (e->fp);
		678	if (openlog (e) == NULL)
		679	continue;
		680	if (fstat (fileno (e->fp), &stats) < 0)
		681	continue;
		682	}
		683
		684	if (stats.st_size < e->last_size)
		685	{ /* file truncated? */
		686	fseek (e->fp, 0, SEEK_SET);
		687	e->last_size = stats.st_size;
		688	}
		689	}
		690	}
		691
		692	/*
		693	* insert a single physical line (that must be short enough to fit)
		694	* at position "idx" by pushing up lines above it. the caller
		695	* MUST then fill in lines[idx] with valid data.
		696	*/
		697	static void
		698	insert_line (int idx)
		699	{
		700	int cur_line;
		701	struct logfile_entry *current;
		702
		703	free (lines[0].line);
		704
		705	for (cur_line = 0; cur_line < idx; cur_line++)
		706	lines[cur_line] = lines[cur_line + 1];
		707
		708	for (current = loglist; current; current = current->next)
		709	if (current->index <= idx)
		710	current->index--;
		711	}
		712
		713	/*
		714	* remove a single physical line at position "idx" by moving the lines above it
		715	* down and inserting a "~" line at the top.
		716	*/
		717	static void
		718	delete_line (int idx)
		719	{
		720	int cur_line;
		721	struct logfile_entry *current;
		722
		723	for (cur_line = idx; cur_line > 0; cur_line--)
		724	lines[cur_line] = lines[cur_line - 1];
		725
		726	lines[0].line = xstrdup ("~");
		727
		728	for (current = loglist; current; current = current->next)
		729	if (current->index >= 0 && current->index <= idx)
		730	current->index++;
		731	}
		732
		733	/*
		734	* takes a logical log file line and splits it into multiple physical
		735	* screen lines by splitting it whenever a part becomes too long.
		736	* lal lines will be inserted at position "idx".
		737	*/
		738	static void
		739	split_line (int idx, const char *str, unsigned long color)
		740	{
		741	int l = strlen (str);
		742	int last_wrapped = 0;
		743	const char *p = str;
		744	static int continuation_width = -1;
		745	static int continuation_length;
		746
		747	/* only calculate the continuation's width once */
		748	if (continuation_width == -1)
		749	{
		750	continuation_length = strlen (continuation);
		751	continuation_width = XmbTextEscapement (fontset, continuation, continuation_length);
		752	}
		753
		754	do
		755	{
		756	const char *beg = p;
		757	int w = last_wrapped ? continuation_width : 0;
		758	int wrapped = 0;
		759	const char *break_p = NULL;
		760
		761	while (*p)
		762	{
		763	/* find the length in bytes of the next multibyte character */
		764	int len = mblen (p, l);
		765	if (len <= 0)
		766	len = 1; /* ignore (don't skip) illegal character sequences */
		767
		768	/* find the width in pixels of the next character */
		769	int cw = XmbTextEscapement (fontset, p, len);
		770	if (cw + w > width - effect_x_space)
		771	{
		772	if (p == beg)
		773	{
		774	fprintf (stderr, "we can't even fit a single character onto the line\n");
		775	if (len == 1) fprintf (stderr, "(the character we couldn't fit was '%c')\n", *p);
		776	exit (1);
		777	}
		778
		779	wrapped = 1;
		780	break;
		781	}
		782
		783	if (opt_wordwrap && len == 1 && p[0] == ' ')
		784	break_p = p;
		785
		786	w += cw;
		787	p += len;
		788	l -= len;
		789	}
		790
		791	/* if we're wrapping at spaces, and the line is long enough to
		792	* wrap, and we've seen a space already, and the space wasn't
		793	* the first character on the line, then wrap at the space */
		794	if (opt_wordwrap && wrapped && break_p && break_p != beg)
		795	{
		796	l += p - break_p;
		797	p = break_p;
		798	}
		799
352	{	800	{
353	char dummy[255];	801	int len = p - beg + (last_wrapped ? continuation_length : 0);
		802	char *s = xmalloc (len + 1);
		803	if (last_wrapped)
		804	{
		805	memcpy (s, continuation, continuation_length);
		806	memcpy (s + continuation_length, beg, p - beg);
		807	}
		808	else
		809	memcpy (s, beg, len);
354		810
355	fseek(file->fp, -((listlen + 2) * width), SEEK_END);	811	s[len] = 0;
356	/* the pointer might point halfway some line. Let's	812	insert_line (idx);
357	be nice and skip this damaged line */	813	lines[idx].line = s;
358	lineinput(dummy, sizeof(dummy), file->fp);	814	lines[idx].len = len;
		815	lines[idx].color = color;
359	}	816	}
360		817
361	file->last_size = stats.st_size;	818	/* if we wrapped at a space, don't display the space */
362	return file->fp;	819	if (opt_wordwrap && wrapped && break_p && break_p != beg)
363	}	820	{
364		821	l--;
365	void reopen(void)	822	p++;
366	{
367	struct logfile_entry *e;
368
369	for (e = loglist; e; e = e->next) {
370	if (!e->inode)
371	continue; /* skip stdin */
372
373	if (e->fp)
374	fclose(e->fp);
375	/* if fp is NULL we will try again later */
376	openlog(e);
377	}
378
379	do_reopen = 0;
380	}
381
382	void check_open_files(void)
383	{
384	struct logfile_entry *e;
385	struct stat stats;
386
387	for (e = loglist; e; e = e->next) {
388	if (!e->inode)
389	continue; /* skip stdin */
390
391	if (stat(e->fname, &stats) < 0) { /* file missing? */
392	sleep(1);
393	if (e->fp)
394	fclose(e->fp);
395	if (openlog(e) == NULL)
396	break;
397	}	823	}
398		824
399	if (stats.st_ino != e->inode) { /* file renamed? */	825	last_wrapped = wrapped;
400	if (e->fp)	826	}
401	fclose(e->fp);	827	while (l);
		828	}
		829
		830	/*
		831	* append something to an existing physical line. this is done
		832	* by deleting the file on-screen, concatenating the new data to it
		833	* and splitting it again.
		834	*/
		835	static void
		836	append_line (int idx, const char *str)
		837	{
		838	unsigned long color = lines[idx].color;
		839	char *old = lines[idx].line;
		840	char *new = concat_line (old, str);
		841
		842	free (old);
		843
		844	delete_line (idx);
		845	split_line (idx, new, color);
		846	}
		847
		848	static void
		849	main_loop (void)
		850	{
		851	lines = xmalloc (sizeof (struct linematrix) * listlen);
		852	display = xmalloc (sizeof (struct displaymatrix) * listlen);
		853	int lin;
		854	time_t lastreload;
		855	Region region = XCreateRegion ();
		856	XEvent xev;
		857	struct logfile_entry *lastprinted = NULL;
		858	struct logfile_entry *current;
		859	int need_update = 1;
		860
		861	lastreload = time (NULL);
		862
		863	/* Initialize linematrix */
		864	for (lin = 0; lin < listlen; lin++)
		865	{
		866	lines[lin].line = xstrdup ("~");
		867	lines[lin].len = 1;
		868	display[lin].line = xstrdup("");
		869	display[lin].len = 0;
		870	display[lin].buffer_size = 0;
		871	lines[lin].color = GetColor (def_color);
		872	}
		873
		874	for (;;)
		875	{
		876	/* read logs */
		877	for (current = loglist; current; current = current->next)
		878	{
		879	if (!current->fp)
		880	continue; /* skip missing files */
		881
		882	clearerr (current->fp);
		883
		884	while (lineinput (current))
		885	{
		886	need_update = 1;
		887	/* if we're trying to update old partial lines in
		888	* place, and the last time this file was updated the
		889	* output was partial, and that partial line is not
		890	* too close to the top of the screen, then update
		891	* that partial line */
		892	if (opt_update && current->lastpartial && current->index >= 0)
		893	{
		894	int idx = current->index;
		895	append_line (idx, current->buf);
		896	current->index = idx;
		897	free (current->buf), current->buf = 0;
		898	continue;
		899	}
		900
		901	/* print filename if any, and if last line was from
		902	* different file */
		903	if (!opt_nofilename && lastprinted != current && current->desc[0])
		904	{
		905	split_line (listlen - 1, "[", current->color);
		906	append_line (listlen - 1, current->desc);
		907	append_line (listlen - 1, "]");
		908	}
		909
		910	/* if we're dealing with partial lines, and the last
		911	* time we showed the line it wasn't finished ... */
		912	if (!opt_whole && current->lastpartial)
		913	{
		914	/* if this is the same file we showed last then
		915	append to the last line shown */
		916	if (lastprinted == current)
		917	append_line (listlen - 1, current->buf);
		918	else
		919	{
		920	/* but if a different file has been shown in the
		921	* mean time, make a new line, starting with the
		922	* continuation string */
		923	split_line (listlen - 1, continuation, current->color);
		924	append_line (listlen - 1, current->buf);
		925	}
		926	}
		927	else
		928	/* otherwise just make a plain and simple new line */
		929	split_line (listlen - 1, current->buf, current->color);
		930
		931	free (current->buf), current->buf = 0;
		932	current->index = listlen - 1;
		933	lastprinted = current;
		934	}
		935	}
		936
		937	if (need_update)
		938	{
		939	redraw (0);
		940	need_update = 0;
		941	}
		942	else
		943	{
		944	XFlush (disp);
		945
		946	if (!XPending (disp))
		947	{
		948	fd_set fdr;
		949	struct timeval to = interval;
		950
		951	FD_ZERO (&fdr);
		952	FD_SET (ConnectionNumber (disp), &fdr);
		953	select (ConnectionNumber (disp) + 1, &fdr, 0, 0, &to);
		954	}
		955	}
		956
		957	check_open_files ();
		958
		959	if (do_reopen)
		960	reopen ();
		961
		962	/* we ignore possible errors due to window resizing &c */
		963	while (XPending (disp))
		964	{
		965	XNextEvent (disp, &xev);
		966
		967	switch (xev.type)
		968	{
		969	case Expose:
		970	{
		971	XRectangle r;
		972
		973	r.x = xev.xexpose.x;
		974	r.y = xev.xexpose.y;
		975	r.width = xev.xexpose.width;
		976	r.height = xev.xexpose.height;
		977
		978	XUnionRectWithRegion (&r, region, region);
		979	}
		980	break;
		981	default:
		982	#ifdef DEBUGMODE
		983	fprintf (stderr, "PANIC! Unknown event %d\n", xev.type);
		984	#endif
		985	break;
		986	}
		987	}
		988
		989	/* reload if requested */
		990	if (reload && lastreload + reload < time (NULL))
		991	{
		992	if (command && command[0])
		993	system (command);
		994
		995	reopen ();
		996	lastreload = time (NULL);
		997	}
		998
		999	if (!XEmptyRegion (region))
		1000	{
		1001	XRectangle r;
		1002
		1003	XSetRegion (disp, WinGC, region);
		1004	XClipBox (region, &r);
		1005
		1006	refresh (r.y, r.y + r.height, 0, 1);
		1007
		1008	XDestroyRegion (region);
		1009	region = XCreateRegion ();
		1010	}
		1011	}
		1012	}
		1013
		1014
		1015	int
		1016	main (int argc, char *argv[])
		1017	{
		1018	int i;
		1019	int opt_daemonize = 0;
		1020	int opt_partial = 0, file_count = 0;
		1021	#if HAS_REGEX
		1022	char *transform = NULL;
		1023	#endif
		1024
		1025	setlocale (LC_CTYPE, ""); /* try to initialize the locale. */
		1026
		1027	/* window needs to be initialized before colorlookups can be done */
		1028	/* just a dummy to get the color lookups right */
		1029	geom_mask = NoValue;
		1030	InitWindow ();
		1031
		1032	for (i = 1; i < argc; i++)
		1033	{
		1034	const char *arg = argv[i];
		1035
		1036	if (arg[0] == '-' && arg[1] != '\0' && arg[1] != ',')
		1037	{
		1038	if (arg[1] == '-')
		1039	arg++;
		1040
		1041	if (!strcmp (arg, "-?") ||
		1042	!strcmp (arg, "-help") || !strcmp (arg, "-h"))
		1043	display_help (argv[0]);
		1044	else if (!strcmp (arg, "-V"))
		1045	display_version ();
		1046	else if (!strcmp (arg, "-g") || !strcmp (arg, "-geometry"))
		1047	geom_mask =
		1048	XParseGeometry (argv[++i], &win_x, &win_y, &width, &height);
		1049	else if (!strcmp (arg, "-display"))
		1050	dispname = argv[++i];
		1051	else if (!strcmp (arg, "-cont"))
		1052	continuation = argv[++i];
		1053	else if (!strcmp (arg, "-font") || !strcmp (arg, "-fn"))
		1054	fontname = argv[++i];
		1055	#if HAS_REGEX
		1056	else if (!strcmp (arg, "-t"))
		1057	{
		1058	transform = argv[++i];
		1059	transform_to = argv[++i];
		1060	printf("transform: '%s' to '%s'\n", transform, transform_to);
		1061	}
		1062	#endif
		1063	else if (!strcmp (arg, "-fork") || !strcmp (arg, "-f"))
		1064	opt_daemonize = 1;
		1065	else if (!strcmp (arg, "-reload"))
		1066	{
		1067	reload = atoi (argv[++i]);
		1068	command = argv[++i];
		1069	}
		1070	else if (!strcmp (arg, "-shade"))
		1071	opt_shade = 1;
		1072	else if (!strcmp (arg, "-outline"))
		1073	opt_outline = 1;
		1074	else if (!strcmp (arg, "-noflicker"))
		1075	opt_noflicker = 1;
		1076	else if (!strcmp (arg, "-frame"))
		1077	opt_frame = 1;
		1078	else if (!strcmp (arg, "-no-filename"))
		1079	opt_nofilename = 1;
		1080	else if (!strcmp (arg, "-reverse"))
		1081	opt_reverse = 1;
		1082	else if (!strcmp (arg, "-whole"))
		1083	opt_whole = 1;
		1084	else if (!strcmp (arg, "-partial"))
		1085	opt_partial = 1;
		1086	else if (!strcmp (arg, "-update"))
		1087	opt_update = opt_partial = 1;
		1088	else if (!strcmp (arg, "-wordwrap"))
		1089	opt_wordwrap = 1;
		1090	else if (!strcmp (arg, "-color"))
		1091	def_color = argv[++i];
		1092	else if (!strcmp (arg, "-noinitial"))
		1093	opt_noinitial = 1;
		1094	else if (!strcmp (arg, "-id"))
		1095	root = atoi (argv[++i]);
		1096	else if (!strcmp (arg, "-interval") || !strcmp (arg, "-i"))
		1097	{
		1098	double iv = atof (argv[++i]);
		1099
		1100	interval.tv_sec = (int) iv;
		1101	interval.tv_usec = (iv - interval.tv_sec) * 1e6;
		1102	}
		1103	else
		1104	{
		1105	fprintf (stderr, "Unknown option '%s'.\n"
		1106	"Try --help for more information.\n", arg);
		1107	exit (1);
		1108	}
		1109	}
		1110	else
		1111	{ /* it must be a filename */
		1112	struct logfile_entry *e;
		1113	const char *fname, *desc, *fcolor = def_color;
		1114	char *p;
		1115
		1116	file_count++;
		1117
		1118	/* this is not foolproof yet (',' in filenames are not allowed) */
		1119	fname = desc = arg;
		1120	if ((p = strchr (arg, ',')))
		1121	{
		1122	*p = '\0';
		1123	fcolor = p + 1;
		1124
		1125	if ((p = strchr (fcolor, ',')))
		1126	{
		1127	*p = '\0';
		1128	desc = p + 1;
		1129	}
		1130	}
		1131
		1132	e = xmalloc (sizeof (struct logfile_entry));
		1133	e->partial = 0;
		1134	e->buf = 0;
		1135	e->index = -1;
		1136
		1137	if (arg[0] == '-' && arg[1] == '\0')
		1138	{
		1139	if ((e->fp = fdopen (0, "r")) == NULL)
		1140	perror ("fdopen"), exit (1);
		1141	if (fcntl (0, F_SETFL, O_NONBLOCK) < 0)
		1142	perror ("fcntl"), exit (1);
		1143
		1144	e->fname = NULL;
		1145	e->inode = 0;
		1146	e->desc = xstrdup ("stdin");
		1147	}
		1148	else
		1149	{
		1150	e->fname = xstrdup (fname);
		1151
402	if (openlog(e) == NULL)	1152	if (openlog (e) == NULL)
403	break;	1153	perror (fname), exit (1);
		1154
		1155	e->desc = xstrdup (desc);
		1156	}
		1157
		1158	e->color = GetColor (fcolor);
		1159	e->partial = 0;
		1160	e->next = NULL;
		1161
		1162	if (!loglist)
		1163	loglist = e;
		1164	if (loglist_tail)
		1165	loglist_tail->next = e;
		1166
		1167	loglist_tail = e;
		1168	}
		1169	}
		1170
		1171	if (!loglist)
		1172	{
		1173	fprintf (stderr, "You did not specify any files to tail\n"
		1174	"use %s --help for help\n", argv[0]);
		1175	exit (1);
		1176	}
		1177
		1178	if (opt_update && opt_whole)
		1179	{
		1180	fprintf (stderr, "Specify at most one of -update and -whole\n");
		1181	exit (1);
		1182	}
		1183	else if (opt_partial && opt_whole)
		1184	{
		1185	fprintf (stderr, "Specify at most one of -partial and -whole\n");
		1186	exit (1);
		1187	}
		1188
		1189	/* HACK-7: do we want to allow both -shade and -outline? */
		1190	if (opt_shade && opt_outline)
		1191	{
		1192	fprintf (stderr, "Specify at most one of -shade and -outline\n");
		1193	exit (1);
		1194	}
		1195
		1196	if (opt_partial)
		1197	/* if we specifically requested to see partial lines then don't insist on whole lines */
		1198	opt_whole = 0;
		1199	else if (file_count > 1)
		1200	/* otherwise, if we're viewing multiple files, default to showing whole lines */
		1201	opt_whole = 1;
		1202
		1203	#if HAS_REGEX
		1204	if (transform)
		1205	{
		1206	int i;
		1207
		1208	printf("compiling regexp '%s'\n", transform);
		1209	transformre = xmalloc (sizeof (regex_t));
		1210	i = regcomp (transformre, transform, REG_EXTENDED);
		1211	if (i != 0)
		1212	{
		1213	char buf[512];
		1214
		1215	regerror (i, transformre, buf, sizeof (buf));
		1216	fprintf (stderr, "Cannot compile regular expression: %s\n", buf);
		1217	}
		1218	else
		1219	{
		1220	printf("compiled '%s' OK to %x\n", transform, (int)transformre);
404	}	1221	}
405
406	if (stats.st_size < e->last_size) { /* file truncated? */
407	fseek(e->fp, 0, SEEK_SET);
408	e->last_size = stats.st_size;
409	}
410	}
411	}
412
413	#define SCROLL_UP(lines, listlen) \
414	{ \
415	int cur_line; \
416	for (cur_line = 0; cur_line < (listlen - 1); cur_line++) { \
417	strcpy(lines[cur_line].line, lines[cur_line + 1].line); \
418	lines[cur_line].color = lines[cur_line + 1].color; \
419	} \
420	}
421
422	void main_loop(void)
423	{
424	struct linematrix *lines = xmalloc(sizeof(struct linematrix) * listlen);
425	int lin, miny, maxy, buflen;
426	char *buf;
427	time_t lastreload;
428	Region region = XCreateRegion();
429	XEvent xev;
430
431	maxy = 0;
432	miny = win_y + h;
433	buflen = width + 2;
434	buf = xmalloc(buflen);
435	lastreload = time(NULL);
436
437	/* Initialize linematrix */
438	for (lin = 0; lin < listlen; lin++) {
439	lines[lin].line = xmalloc(buflen);
440	strcpy(lines[lin].line, "~");
441	lines[lin].color = GetColor(def_color);
442	}
443
444	if (!opt_noinitial)
445	while (lineinput(buf, buflen, loglist->fp) != 0) {
446	SCROLL_UP(lines, listlen);
447	/* print the next line */
448	strcpy(lines[listlen - 1].line, buf);
449	}
450
451	for (;;) {
452	int need_update = 0;
453	struct logfile_entry *current;
454	static struct logfile_entry *lastprinted = NULL;
455
456	/* read logs */
457	for (current = loglist; current; current = current->next) {
458	if (!current->fp)
459	continue; /* skip missing files */
460
461	clearerr(current->fp);
462
463	while (lineinput(buf, buflen, current->fp) != 0) {
464	/* print filename if any, and if last line was from
465	different file */
466	if (!opt_nofilename &&
467	!(lastprinted && lastprinted == current) &&
468	current->desc[0]) {
469	SCROLL_UP(lines, listlen);
470	sprintf(lines[listlen - 1].line, "[%s]", current->desc);
471	lines[listlen - 1].color = current->color;
472	}
473
474	SCROLL_UP(lines, listlen);
475	strcpy(lines[listlen - 1].line, buf);
476	lines[listlen - 1].color = current->color;
477
478	lastprinted = current;
479	need_update = 1;
480	}	1222	}
481	}
482
483	if (need_update)
484	redraw();
485	else {
486	XFlush(disp);
487	if (!XPending(disp)) {
488	fd_set fdr;
489	struct timeval to = interval;
490
491	FD_ZERO(&fdr);
492	FD_SET(ConnectionNumber(disp), &fdr);
493	select(ConnectionNumber(disp) + 1, &fdr, 0, 0, &to);
494	}
495	}
496
497	check_open_files();
498
499	if (do_reopen)
500	reopen();
501
502	/* we ignore possible errors due to window resizing &c */
503	while (XPending(disp)) {
504	XNextEvent(disp, &xev);
505	switch (xev.type) {
506	case Expose:
507	{
508	XRectangle r;
509
510	r.x = xev.xexpose.x;
511	r.y = xev.xexpose.y;
512	r.width = xev.xexpose.width;
513	r.height = xev.xexpose.height;
514	XUnionRectWithRegion(&r, region, region);
515	if (miny > r.y)
516	miny = r.y;
517	if (maxy < r.y + r.height)
518	maxy = r.y + r.height;
519	}
520	break;
521	default:
522	#ifdef DEBUGMODE
523	fprintf(stderr, "PANIC! Unknown event %d\n", xev.type);
524	#endif	1223	#endif
525	break;
526	}
527	}
528		1224
529	/* reload if requested */
530	if (reload && lastreload + reload < time(NULL)) {
531	if (command)
532	system(command);
533
534	reopen();
535	lastreload = time(NULL);
536	}
537
538	if (!XEmptyRegion(region)) {
539	XSetRegion(disp, WinGC, region);
540	refresh(lines, miny, maxy);
541	XDestroyRegion(region);
542	region = XCreateRegion();
543	maxy = 0;
544	miny = win_y + h;
545	}
546	}
547	}
548
549
550	int main(int argc, char *argv[])
551	{
552	int i;
553	int opt_daemonize = 0;
554	#if HAS_REGEX
555	char *transform = NULL;
556	#endif
557
558	/* window needs to be initialized before colorlookups can be done */
559	/* just a dummy to get the color lookups right */
560	geom_mask = NoValue;
561	InitWindow();	1225	InitWindow ();
562		1226
563	for (i = 1; i < argc; i++) {
564	if (argv[i][0] == '-' && argv[i][1] != '\0' && argv[i][1] != ',') {
565	if (!strcmp(argv[i], "--?") ||
566	!strcmp(argv[i], "--help") || !strcmp(argv[i], "-h"))
567	display_help(argv[0]);
568	else if (!strcmp(argv[i], "-V"))
569	display_version();
570	else if (!strcmp(argv[i], "-g") || !strcmp(argv[i], "-geometry"))
571	geom_mask = XParseGeometry(argv[++i],
572	&win_x, &win_y, &width, &listlen);
573	else if (!strcmp(argv[i], "-display"))
574	dispname = argv[++i];
575	else if (!strcmp(argv[i], "-font") || !strcmp(argv[i], "-fn"))
576	fontname = argv[++i];
577	#if HAS_REGEX
578	else if (!strcmp(argv[i], "-t"))
579	transform = argv[++i];
580	#endif
581	else if (!strcmp(argv[i], "-fork") || !strcmp(argv[i], "-f"))
582	opt_daemonize = 1;
583	else if (!strcmp(argv[i], "-reload")) {
584	reload = atoi(argv[++i]);
585	command = argv[++i];
586	}
587	else if (!strcmp(argv[i], "-shade"))
588	opt_shade = 1;
589	else if (!strcmp(argv[i], "-frame"))
590	opt_frame = 1;
591	else if (!strcmp(argv[i], "-no-filename"))
592	opt_nofilename = 1;
593	else if (!strcmp(argv[i], "-reverse"))
594	opt_reverse = 1;
595	else if (!strcmp(argv[i], "-color"))
596	def_color = argv[++i];
597	else if (!strcmp(argv[i], "-noinitial"))
598	opt_noinitial = 1;
599	else if (!strcmp(argv[i], "-interval") || !strcmp(argv[i], "-i")) {
600	double iv = atof(argv[++i]);
601
602	interval.tv_sec = (int) iv;
603	interval.tv_usec = (iv - interval.tv_sec) * 1e6;
604	} else {
605	fprintf(stderr, "Unknown option '%s'.\n"
606	"Try --help for more information.\n", argv[i]);
607	exit(1);
608	}
609	} else { /* it must be a filename */
610	struct logfile_entry *e;
611	const char *fname, *desc, *fcolor = def_color;
612	char *p;
613
614	/* this is not foolproof yet (',' in filenames are not allowed) */
615	fname = desc = argv[i];
616	if ((p = strchr(argv[i], ','))) {
617	*p = '\0';
618	fcolor = p + 1;
619
620	if ((p = strchr(fcolor, ','))) {
621	*p = '\0';
622	desc = p + 1;
623	}
624	}
625
626	e = xmalloc(sizeof(struct logfile_entry));
627	if (argv[i][0] == '-' && argv[i][1] == '\0') {
628	if ((e->fp = fdopen(0, "r")) == NULL)
629	perror("fdopen"), exit(1);
630	if (fcntl(0, F_SETFL, O_NONBLOCK) < 0)
631	perror("fcntl"), exit(1);
632	e->fname = NULL;
633	e->inode = 0;
634	e->desc = xstrdup("stdin");
635	} else {
636	int l;
637
638	e->fname = xstrdup(fname);
639	if (openlog(e) == NULL)
640	perror(fname), exit(1);
641
642	l = strlen(desc);
643	if (l > width - 2) /* must account for [ ] */
644	l = width - 2;
645	e->desc = xmalloc(l + 1);
646	memcpy(e->desc, desc, l);
647	*(e->desc + l) = '\0';
648	}
649
650	e->color = GetColor(fcolor);
651	e->next = NULL;
652
653	if (!loglist)
654	loglist = e;
655	if (loglist_tail)
656	loglist_tail->next = e;
657	loglist_tail = e;
658	}
659	}
660
661	if (!loglist) {
662	fprintf(stderr, "You did not specify any files to tail\n"
663	"use %s --help for help\n", argv[0]);
664	exit(1);
665	}
666
667	#if HAS_REGEX
668	if (transform) {
669	int i;
670
671	transformre = xmalloc(sizeof(transformre));
672	i = regcomp(&transformre, transform, REG_EXTENDED);
673	if (i != 0) {
674	char buf[512];
675
676	regerror(i, &transformre, buf, sizeof(buf));
677	fprintf(stderr, "Cannot compile regular expression: %s\n", buf);
678	}
679	}
680	#endif
681
682	InitWindow();
683
684	install_signal(SIGINT, blank_window);	1227	install_signal (SIGINT, blank_window);
685	install_signal(SIGQUIT, blank_window);	1228	install_signal (SIGQUIT, blank_window);
686	install_signal(SIGTERM, blank_window);	1229	install_signal (SIGTERM, blank_window);
687	install_signal(SIGHUP, force_reopen);	1230	install_signal (SIGHUP, force_reopen);
688	install_signal(SIGUSR1, list_files);	1231	install_signal (SIGUSR1, list_files);
689	install_signal(SIGUSR2, force_refresh);	1232	install_signal (SIGUSR2, force_refresh);
690		1233
691	if (opt_daemonize)	1234	if (opt_daemonize)
692	daemonize();	1235	daemonize ();
693		1236
694	main_loop();	1237	main_loop ();
695		1238
696	exit(1); /* to make gcc -Wall stop complaining */	1239	exit (1); /* to make gcc -Wall stop complaining */
697	}	1240	}
698		1241
		1242	void
699	void install_signal(int sig, void (*handler)(int))	1243	install_signal (int sig, void (*handler) (int))
700	{	1244	{
701	struct sigaction action;	1245	struct sigaction action;
702		1246
703	action.sa_handler = handler;	1247	action.sa_handler = handler;
704	sigemptyset(&action.sa_mask);	1248	sigemptyset (&action.sa_mask);
705	action.sa_flags = SA_RESTART;	1249	action.sa_flags = SA_RESTART;
		1250
706	if (sigaction(sig, &action, NULL) < 0)	1251	if (sigaction (sig, &action, NULL) < 0)
707	fprintf(stderr, "sigaction(%d): %s\n", sig, strerror(errno)), exit(1);	1252	fprintf (stderr, "sigaction(%d): %s\n", sig, strerror (errno)), exit (1);
708	}	1253	}
709		1254
		1255	void *
710	void *xstrdup(const char *string)	1256	xstrdup (const char *string)
711	{	1257	{
712	void *p;	1258	void *p;
713		1259
714	while ((p = strdup(string)) == NULL) {	1260	while ((p = strdup (string)) == NULL)
		1261	{
715	fprintf(stderr, "Memory exausted.");	1262	fprintf (stderr, "Memory exausted.");
716	sleep(10);	1263	sleep (10);
717	}	1264	}
		1265
718	return p;	1266	return p;
719	}	1267	}
720		1268
		1269	void *
721	void *xmalloc(size_t size)	1270	xmalloc (size_t size)
722	{	1271	{
723	void *p;	1272	void *p;
724		1273
725	while ((p = malloc(size)) == NULL) {	1274	while ((p = malloc (size)) == NULL)
		1275	{
726	fprintf(stderr, "Memory exausted.");	1276	fprintf (stderr, "Memory exausted.");
727	sleep(10);	1277	sleep (10);
728	}	1278	}
		1279
729	return p;	1280	return p;
730	}	1281	}
731		1282
		1283	void *
		1284	xrealloc (void *ptr, size_t size)
		1285	{
		1286	void *p;
		1287
		1288	while ((p = realloc (ptr, size)) == NULL)
		1289	{
		1290	fprintf (stderr, "Memory exausted.");
		1291	sleep (10);
		1292	}
		1293
		1294	return p;
		1295	}
		1296
		1297	void
732	void display_help(char *myname)	1298	display_help (char *myname)
733	{	1299	{
734	printf("Usage: %s [options] file1[,color[,desc]] "	1300	printf ("Usage: %s [options] file1[,color[,desc]] "
735	"[file2[,color[,desc]] ...]\n", myname);	1301	"[file2[,color[,desc]] ...]\n", myname);
736	printf(" -g | -geometry geometry -g WIDTHxHEIGHT+X+Y\n"	1302	printf (" -g | -geometry geometry -g WIDTHxHEIGHT+X+Y\n"
737	" -color color use color $color as default\n"	1303	" -color color use color $color as default\n"
738	" -reload sec command reload after $sec and run command\n"	1304	" -reload sec command reload after $sec and run command\n"
739	" by default -- 3 mins\n"	1305	" -id id window id to use instead of the root window\n"
740	" -font FONTSPEC (-fn) font to use\n"	1306	" -font FONTSPEC (-fn) font to use\n"
741	" -f | -fork fork into background\n"	1307	" -f | -fork fork into background\n"
742	" -reverse print new lines at the top\n"	1308	" -reverse print new lines at the top\n"
		1309	" -whole wait for \\n before showing a line\n"
		1310	" -partial show lines even if they don't end with a \\n\n"
		1311	" -update allow updates to old partial lines\n"
		1312	" -cont string to prefix continued partial lines with\n"
		1313	" -wordwrap wrap long lines at spaces to avoid breaking words\n"
		1314	" defaults to \"[+]\"\n"
743	" -shade add shading to font\n"	1315	" -shade add shading to font\n"
744	" -noinitial don't display the last file lines on\n"	1316	" -noinitial don't display the last file lines on\n"
745	" startup\n"	1317	" startup\n"
746	" -i | -interval seconds interval between checks (fractional\n"	1318	" -i | -interval seconds interval between checks (fractional\n"
747	" values o.k.). Default 3\n"	1319	" values o.k.). Default 2.4 seconds\n"
748	" -V display version information and exit\n"	1320	" -V display version information and exit\n"
749	"\n");	1321	"\n");
750	printf("Example:\n%s -g 80x25+100+50 -font fixed /var/log/messages,green "	1322	printf ("Example:\n%s -g 80x25+100+50 -font fixed /var/log/messages,green "
751	"/var/log/secure,red,'ALERT'\n", myname);	1323	"/var/log/secure,red,'ALERT'\n", myname);
752	exit(0);	1324	exit (0);
753	}	1325	}
754		1326
		1327	void
755	void display_version(void) {	1328	display_version (void)
		1329	{
756	printf("root-tail version " VERSION "\n");	1330	printf ("root-tail version " VERSION "\n");
757	exit(0);	1331	exit (0);
758	}	1332	}
759		1333
		1334	int
760	int daemonize(void) {	1335	daemonize (void)
		1336	{
		1337	pid_t pid;
		1338
761	switch (fork()) {	1339	switch (pid = fork ())
		1340	{
762	case -1:	1341	case -1:
763	return -1;	1342	return -1;
764	case 0:	1343	case 0:
765	break;	1344	break;
766	default:	1345	default:
767	_exit(0);	1346	/*printf("%d\n", pid);*/
		1347	exit (0);
768	}	1348	}
769		1349
770	if (setsid() == -1)	1350	if (setsid () == -1)
771	return -1;	1351	return -1;
772		1352
773	return 0;	1353	return 0;
774	}	1354	}
775

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