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Comparing root-tail/root-tail.c (file contents):
Revision 1.8 by pcg, Thu Mar 25 21:46:56 2004 UTC vs.
Revision 1.63 by chris_moore, Thu Apr 15 00:38:13 2004 UTC

1	/*	1	/*
2	* Copyright 2001 by Marco d'Itri <md@linux.it>	2	* Copyright 2001 by Marco d'Itri <md@linux.it>
		3	* Copyright 2000,2001,2002,2003,2004
		4	* Marc Lehmann <pcg@goof.com>,
		5	* Chris Moore <chris.moore@mail.com>,
		6	* and many others, see README
3	*	7	*
4	* Original version by Mike Baker, then maintained by pcg@goof.com.	8	* Original version by Mike Baker.
5	*	9	*
6	* This program is free software; you can redistribute it and/or modify	10	* This program is free software; you can redistribute it and/or modify
7	* it under the terms of the GNU General Public License as published by	11	* it under the terms of the GNU General Public License as published by
8	* the Free Software Foundation; either version 2 of the License, or	12	* the Free Software Foundation; either version 2 of the License, or
9	* (at your option) any later version.	13	* (at your option) any later version.
…		…
17	* along with this program; if not, write to the Free Software	21	* along with this program; if not, write to the Free Software
18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.	22	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
19	*/	23	*/
20		24
21	#include "config.h"	25	#include "config.h"
		26	#include <assert.h>
22	#include <stdlib.h>	27	#include <stdlib.h>
23	#include <stdio.h>	28	#include <stdio.h>
24	#include <unistd.h>	29	#include <unistd.h>
25	#include <string.h>	30	#include <string.h>
26	#include <signal.h>	31	#include <signal.h>
…		…
29	#include <errno.h>	34	#include <errno.h>
30	#include <sys/time.h>	35	#include <sys/time.h>
31	#include <sys/stat.h>	36	#include <sys/stat.h>
32	#include <sys/types.h>	37	#include <sys/types.h>
33	#include <locale.h>	38	#include <locale.h>
		39	#include <ctype.h>
		40	#include <stdarg.h>
		41	#include <X11/Xlib.h>
		42	#include <X11/Xatom.h>
		43	#include <X11/Xutil.h>
		44
34	#if HAS_REGEX	45	#if HAS_REGEX
35	#include <regex.h>	46	#include <regex.h>
36	#endif	47	#endif
37	#include <X11/Xlib.h>	48
38	#include <X11/Xatom.h>	49	#define SHADE_X 2
39	#include <X11/Xutil.h>	50	#define SHADE_Y 2
		51
		52	/* some italic fonts still go over the margin - this margin of error cleans up the mess */
		53	#define MARGIN_OF_ERROR 2
40		54
41	/* data structures */	55	/* data structures */
42	struct logfile_entry {	56	struct logfile_entry
43	char *fname; /* name of file */	57	{
44	char *desc; /* alternative description */
45	FILE *fp; /* FILE struct associated with file */
46	ino_t inode; /* inode of the file opened */
47	off_t last_size; /* file size at the last check */
48	unsigned long color; /* color to be used for printing */
49	struct logfile_entry *next;	58	struct logfile_entry *next;
		59
		60	char *fname; /* name of file */
		61	char *desc; /* alternative description */
		62	char *buf; /* text read but not yet displayed */
		63	const char *fontname;
		64	XFontSet fontset;
		65	int font_height;
		66	int font_ascent;
		67	FILE *fp; /* FILE struct associated with file */
		68	ino_t inode; /* inode of the file opened */
		69	off_t last_size; /* file size at the last check */
		70	unsigned long color; /* color to be used for printing */
		71	const char *colorname; /* color name/string */
		72	int partial; /* true if the last line isn't complete */
		73	int lastpartial; /* true if the previous output wasn't complete */
		74	struct line_node *last; /* last line we output */
		75	int modified; /* true if line is modified & needs displaying */
50	};	76	};
51		77
52	struct linematrix {	78	struct line_node
53	char *line;	79	{
54	unsigned long color;	80	struct line_node *next;
		81	struct line_node *prev;
		82	struct logfile_entry *logfile;
		83
		84	char *line; /* the text of the line (so far) */
		85	int len; /* the length of the line (in bytes) so far */
		86	int wrapped_left; /* true if wrapped from the previous line */
		87	int wrapped_right; /* true if wrapped to the next line */
		88	struct breakinfo *breaks; /* array of indicies to spaces if wrapped_right */
		89	int num_words; /* the number of words in the line */
		90	int free_pixels; /* the number of free pixels to spread out */
55	};	91	};
56		92
		93	struct breakinfo
		94	{
		95	int index; /* index into string of start of substring */
		96	int width; /* width in pixels of start of substring */
		97	int len; /* length of substring */
		98	};
		99
		100	struct displaymatrix
		101	{
		102	char *line;
		103	int len;
		104	int offset;
		105	int buffer_size;
		106	unsigned long color;
		107	};
57		108
58	/* global variables */	109	/* global variables */
		110	struct line_node *linelist = NULL, *linelist_tail = NULL;
		111	struct displaymatrix *display;
		112	int continuation_width = -1;
		113	int continuation_color;
		114	int continuation_length;
		115
		116	/* HACK - ideally listlen will start at however many '~'s will fit on
		117	* the screen */
59	int width = STD_WIDTH, listlen = STD_HEIGHT;	118	int width = STD_WIDTH, height = STD_HEIGHT, listlen = 50;
60	int win_x = LOC_X, win_y = LOC_Y;	119	int win_x = LOC_X, win_y = LOC_Y;
61	int w = -1, h = -1, font_width, font_height, font_descent;	120	int effect_x_space, effect_y_space; /* how much space does shading / outlining take up */
		121	int effect_x_offset, effect_y_offset; /* and how does it offset the usable space */
62	int do_reopen;	122	int do_reopen;
63	struct timeval interval = { 2, 400000 }; /* see Knuth */	123	struct timeval interval = { 2, 400000 };
64	XFontSet fontset;
65		124
66	/* command line options */	125	/* command line options */
67	int opt_noinitial, opt_shade, opt_frame, opt_reverse, opt_nofilename,	126	int opt_noinitial, opt_shade, opt_frame, opt_reverse, opt_nofilename,
68	geom_mask, reload = 3600;	127	opt_outline, opt_noflicker, opt_whole, opt_update, opt_wordwrap,
		128	opt_justify, geom_mask, opt_minspace, reload;
69	const char *command = NULL,	129	const char *command = NULL,
70	*fontname = USE_FONT, *dispname = NULL, *def_color = DEF_COLOR;	130	*fontname = USE_FONT, *dispname = NULL, *def_color = DEF_COLOR,
		131	*continuation = "|| ", *cont_color = DEF_CONT_COLOR;
71		132
72	struct logfile_entry *loglist = NULL, *loglist_tail = NULL;	133	struct logfile_entry *loglist = NULL, *loglist_tail = NULL;
73		134
74	Display *disp;	135	Display *disp;
75	Window root;	136	Window root;
76	GC WinGC;	137	GC WinGC;
77		138
78	#if HAS_REGEX	139	#if HAS_REGEX
79	struct re_list {	140	struct re_list
		141	{
80	regex_t from;	142	regex_t from;
81	const char *to;	143	const char *to;
82	struct re_list *next;	144	struct re_list *next;
83	};	145	};
84	struct re_list *re_head, *re_tail;	146	struct re_list *re_head, *re_tail;
		147	char *transform_to = NULL;
		148	regex_t *transformre;
85	#endif	149	#endif
86		150
87		151
88	/* prototypes */	152	/* prototypes */
89	void list_files(int);	153	void list_files (int);
90	void force_reopen(int);	154	void force_reopen (int);
91	void force_refresh(int);	155	void force_refresh (int);
92	void blank_window(int);	156	void blank_window (int);
		157	#ifdef USE_TOON_GET_ROOT_WINDOW
		158	Window ToonGetRootWindow(Display *, int, Window *);
		159	#endif /* USE_TOON_GET_ROOT_WINDOW */
93		160
94	void InitWindow(void);	161	void InitWindow (void);
95	unsigned long GetColor(const char *);	162	unsigned long GetColor (const char *);
96	void redraw(void);	163	void redraw (int);
97	void refresh(struct linematrix *, int, int);	164	void refresh (int, int, int, int);
98		165
99	void transform_line(char *s);	166	void transform_line (char *s);
100	int lineinput(char *, int, FILE *);	167	int lineinput (struct logfile_entry *);
101	void reopen(void);	168	void reopen (void);
102	void check_open_files(void);	169	void check_open_files (void);
103	FILE *openlog(struct logfile_entry *);	170	FILE *openlog (struct logfile_entry *);
104	void main_loop(void);	171	static void main_loop (void);
105		172
106	void display_version(void);	173	void display_version (void);
107	void display_help(char *);	174	void display_help (char *);
108	void install_signal(int, void (*)(int));	175	void install_signal (int, void (*)(int));
109	void *xstrdup(const char *);	176	void *xstrdup (const char *);
110	void *xmalloc(size_t);	177	void *xmalloc (size_t);
		178	void *xrealloc (void *, size_t);
111	int daemonize(void);	179	int daemonize (void);
112		180
113	/* signal handlers */	181	/* signal handlers */
		182	void
114	void list_files(int dummy)	183	list_files (int dummy)
115	{	184	{
		185	struct logfile_entry *e;
		186
		187	fprintf (stderr, "Files opened:\n");
		188	for (e = loglist; e; e = e->next)
		189	fprintf (stderr, "\t%s (%s)\n", e->fname, e->desc);
		190	}
		191
		192	void
		193	force_reopen (int dummy)
		194	{
		195	do_reopen = 1;
		196	}
		197
		198	void
		199	force_refresh (int dummy)
		200	{
		201	redraw (1);
		202	}
		203
		204	void
		205	blank_window (int dummy)
		206	{
		207	XClearArea (disp, root, win_x, win_y, width + MARGIN_OF_ERROR, height, False);
		208	XFlush (disp);
		209	exit (0);
		210	}
		211
		212	/* X related functions */
		213	unsigned long
		214	GetColor (const char *ColorName)
		215	{
		216	XColor Color;
		217	XWindowAttributes Attributes;
		218
		219	XGetWindowAttributes (disp, root, &Attributes);
		220	Color.pixel = 0;
		221
		222	if (!XParseColor (disp, Attributes.colormap, ColorName, &Color))
		223	fprintf (stderr, "can't parse %s\n", ColorName);
		224	else if (!XAllocColor (disp, Attributes.colormap, &Color))
		225	fprintf (stderr, "can't allocate %s\n", ColorName);
		226
		227	return Color.pixel;
		228	}
		229
		230	#ifndef USE_TOON_GET_ROOT_WINDOW
		231	static void
		232	find_root_window (Display *display, int screen_number)
		233	{
		234	if (!root)
		235	{
		236	Atom SWM_VROOT = XInternAtom (display, "__SWM_VROOT", False);
		237	Atom NAUTILUS_DESKTOP_WINDOW_ID = XInternAtom (display, "NAUTILUS_DESKTOP_WINDOW_ID", False);
		238	root = RootWindow (display, screen_number);
		239
		240	Window unused, *windows = 0;
		241	unsigned int count;
		242
		243	Atom type;
		244	int format;
		245	unsigned long nitems, bytes_after_return;
		246	unsigned char *virtual_root_window;
		247
		248	if (XGetWindowProperty (display, root, NAUTILUS_DESKTOP_WINDOW_ID,
		249	0, 1, False, XA_WINDOW, &type, &format,
		250	&nitems, &bytes_after_return,
		251	&virtual_root_window) == Success
		252	&& type == XA_WINDOW)
		253	{
		254	if (XQueryTree (display, *(Window *)virtual_root_window, &unused, &unused, &windows, &count))
		255	root = windows[count - 1];
		256
		257	XFree (virtual_root_window);
		258	}
		259	else if (XQueryTree (display, root, &unused, &unused, &windows, &count))
		260	{
		261	int i;
		262
		263	for (i = 0; i < count; i++)
		264	{
		265	if (XGetWindowProperty (display, windows[i], SWM_VROOT,
		266	0, 1, False, XA_WINDOW, &type, &format,
		267	&nitems, &bytes_after_return,
		268	&virtual_root_window) == Success
		269	&& type == XA_WINDOW)
		270	{
		271	root = *(Window *)virtual_root_window;
		272	XFree (virtual_root_window);
		273	break;
		274	}
		275	}
		276
		277	XFree (windows);
		278	}
		279	else
		280	fprintf (stderr, "Can't query tree on root window 0x%lx", root);
		281	}
		282	}
		283	#endif /* USE_TOON_GET_ROOT_WINDOW */
		284
		285	void
		286	InitWindow (void)
		287	{
		288	XGCValues gcv;
		289	unsigned long gcm;
		290	int screen, ScreenWidth, ScreenHeight;
		291	struct logfile_entry *e;
		292
		293	if (!(disp = XOpenDisplay (dispname)))
		294	{
		295	fprintf (stderr, "Can't open display %s.\n", dispname);
		296	exit (1);
		297	}
		298
		299	screen = DefaultScreen (disp);
		300	ScreenHeight = DisplayHeight (disp, screen);
		301	ScreenWidth = DisplayWidth (disp, screen);
		302
		303	find_root_window (disp, screen);
		304
		305	gcm = GCBackground;
		306	gcv.graphics_exposures = True;
		307	WinGC = XCreateGC (disp, root, gcm, &gcv);
		308	XMapWindow (disp, root);
		309
		310	XSetForeground (disp, WinGC, GetColor (DEF_COLOR));
		311
		312	for (e = loglist; e; e = e->next)
		313	{
		314	char **missing_charset_list;
		315	int missing_charset_count;
		316	char *def_string;
		317
		318	e->fontset = XCreateFontSet (disp, e->fontname,
		319	&missing_charset_list, &missing_charset_count,
		320	&def_string);
		321
		322	if (missing_charset_count)
		323	{
		324	fprintf (stderr,
		325	"Missing charsets in String to FontSet conversion (%s)\n",
		326	missing_charset_list[0]);
		327	XFreeStringList (missing_charset_list);
		328	}
		329
		330	if (!e->fontset)
		331	{
		332	fprintf (stderr, "unable to create fontset for font '%s', exiting.\n", e->fontname);
		333	exit (1);
		334	}
		335
		336	{
		337	XFontSetExtents *xfe = XExtentsOfFontSet (e->fontset);
		338
		339	e->font_height = xfe->max_logical_extent.height;
		340	e->font_ascent = -xfe->max_logical_extent.y;
		341	}
		342
		343	if (e->font_height > height - effect_y_space)
		344	{
		345	fprintf(stderr, "\n the display isn't tall enough to display a single line in font '%s'\n",
		346	e->fontname);
		347	fprintf(stderr, "\n the geometry in use is %d pixels tall\n", height);
		348	fprintf(stderr, "\n font '%s' is %d pixels tall\n", e->fontname, e->font_height);
		349	if (effect_y_space)
		350	fprintf(stderr, "\n the shade or outline options need an extra %d pixel%s of vertical space\n",
		351	effect_y_space, effect_y_space == 1 ? "" : "s");
		352	fprintf(stderr, "\n");
		353	exit(1);
		354	}
		355	}
		356
		357	if (geom_mask & XNegative)
		358	win_x = win_x + ScreenWidth - width;
		359	if (geom_mask & YNegative)
		360	win_y = win_y + ScreenHeight - height;
		361
		362	{
116	struct logfile_entry *e;	363	struct logfile_entry *e;
117		364
118	fprintf(stderr, "Files opened:\n");
119	for (e = loglist; e; e = e->next)	365	for (e = loglist; e; e = e->next)
120	fprintf(stderr, "\t%s (%s)\n", e->fname, e->desc);	366	e->color = GetColor (e->colorname);
121	}	367	}
122		368
123	void force_reopen(int dummy)	369	XSelectInput (disp, root, ExposureMask | FocusChangeMask);
124	{
125	do_reopen = 1;
126	}	370	}
127		371
128	void force_refresh(int dummy)	372	/*
		373	* if redraw () is passwd a non-zero argument, it does a complete
		374	* redraw, rather than an update. if the argument is zero (and
		375	* -noflicker is in effect) then only the lines which have changed
		376	* since the last draw are redrawn.
		377	*
		378	* the rest is handled by regular refresh ()'es
		379	*/
		380	void
		381	redraw (int redraw_all)
129	{	382	{
130	XClearArea(disp, root, win_x, win_y, w, h + font_descent + 2, False);	383	XSetClipMask (disp, WinGC, None);
131	redraw();	384	refresh (0, 32768, 1, redraw_all);
132	}	385	}
133		386
134	void blank_window(int dummy)	387	void draw_text (Display *disp, Window root, GC WinGC, int x, int y, struct line_node *line, int foreground)
135	{	388	{
136	XClearArea(disp, root, win_x, win_y, w, h + font_descent + 2, False);	389	if (line->wrapped_right && opt_justify && line->breaks)
137	XFlush(disp);	390	{
138	exit(0);	391	int i;
139	}	392	for (i = 0; i < line->num_words; i++)
		393	XmbDrawString (disp, root, line->logfile->fontset, WinGC,
		394	x + line->breaks[i].width + ((i * line->free_pixels) / (line->num_words - 1))
		395	+ continuation_width * line->wrapped_left, y,
		396	line->line + line->breaks[i].index,
		397	line->breaks[i].len);
140		398
141	/* X related functions */	399	if (line->wrapped_left)
142	unsigned long GetColor(const char *ColorName)	400	{
143	{	401	if (foreground) XSetForeground (disp, WinGC, continuation_color);
144	XColor Color;	402	XmbDrawString (disp, root, line->logfile->fontset, WinGC, x, y, continuation, continuation_length);
145	XWindowAttributes Attributes;	403	}
146
147	XGetWindowAttributes(disp, root, &Attributes);
148	Color.pixel = 0;
149
150	if (!XParseColor(disp, Attributes.colormap, ColorName, &Color))
151	fprintf(stderr, "can't parse %s\n", ColorName);
152	else if (!XAllocColor(disp, Attributes.colormap, &Color))
153	fprintf(stderr, "can't allocate %s\n", ColorName);
154
155	return Color.pixel;
156	}
157
158	static Window root_window (Display *display, int screen_number)
159	{
160	Atom __SWM_VROOT = XInternAtom (display, "__SWM_VROOT", False);
161	Window real_root_window = RootWindow (display, screen_number);
162
163	if (root) /* root window set via option */
164	return root;
165
166	if (__SWM_VROOT != None)
167	{	404	}
168	Window unused, *windows;	405	else
169	unsigned int count;	406	{
		407	XmbDrawString (disp, root, line->logfile->fontset, WinGC, x + continuation_width * line->wrapped_left,
		408	y, line->line, line->len);
170		409
171	if (XQueryTree (display, real_root_window, &unused, &unused, &windows,	410	if (line->wrapped_left)
172	&count))	411	{
173	{	412	if (foreground) XSetForeground (disp, WinGC, continuation_color);
		413	XmbDrawString (disp, root, line->logfile->fontset, WinGC, x, y, continuation, continuation_length);
		414	}
		415	}
		416	}
		417
		418	/* Just redraw everything without clearing (i.e. after an EXPOSE event) */
		419	void
		420	refresh (int miny, int maxy, int clear, int refresh_all)
		421	{
		422	int lin = 0;
		423	int space = height;
		424	int offset;
		425	unsigned long black_color = GetColor ("black");
		426	struct line_node *line;
		427	int step_per_line;
		428	int foreground = 0;
		429
		430	if (opt_reverse)
		431	offset = effect_y_offset;
		432	else
		433	offset = height + effect_y_offset;
		434
		435	miny -= win_y;
		436	maxy -= win_y;
		437
		438	if (clear && !opt_noflicker)
		439	XClearArea (disp, root, win_x, win_y, width + MARGIN_OF_ERROR, height, False);
		440
		441	for (line = linelist; line; line = line->next, lin++)
		442	{
		443	struct displaymatrix *display_line;
		444
		445	if (opt_noflicker && lin >= listlen)
		446	{
		447	int i = listlen;
		448	listlen *= 1.5;
		449	display = xrealloc(display, listlen * sizeof(struct displaymatrix));
		450	for (; i < listlen; i++)
		451	{
		452	display[i].line = xstrdup ("");
		453	display[i].len = 0;
		454	display[i].offset = 0;
		455	display[i].buffer_size = 0;
		456	}
		457	}
		458
		459	display_line = display + lin;
		460
		461	step_per_line = line->logfile->font_height + effect_y_space;
		462	if (step_per_line > space)
		463	break;
		464
		465	if (!opt_reverse)
		466	offset -= step_per_line;
		467
		468	offset += line->logfile->font_ascent;
		469
		470	miny -= line->logfile->font_height;
		471	maxy += line->logfile->font_height;
		472
		473	if (offset >= miny && offset <= maxy)
		474	{
		475	/* if this line is a different than it was, then it
		476	* needs displaying */
		477	if (!opt_noflicker
		478	|| refresh_all
		479	|| display_line->len != line->len
		480	|| display_line->color != line->logfile->color
		481	|| display_line->offset != offset
		482	|| memcmp (display_line->line, line->line, line->len))
		483	{
		484	/* don't bother updating the record of what has been
		485	* displayed if -noflicker isn't in effect, since we redraw
		486	* the whole display every time anyway */
		487	if (opt_noflicker)
		488	{
		489	/* update the record of what has been displayed;
		490	* first make sure the buffer is big enough */
		491	if (display_line->buffer_size < line->len)
		492	{
		493	display_line->buffer_size = line->len;
		494	display_line->line = xrealloc (display_line->line, display_line->buffer_size);
		495	}
		496
		497	display_line->len = line->len;
		498	display_line->color = line->logfile->color;
		499	display_line->offset = offset;
		500	memcpy (display_line->line, line->line, line->len);
		501
		502	if (clear)
		503	{
		504	#ifdef DEBUG
		505	static int toggle;
		506	toggle = 1 - toggle;
		507	XSetForeground (disp, WinGC, toggle ? GetColor ("cyan") : GetColor ("yellow"));
		508	XFillRectangle (disp, root, WinGC, win_x, win_y + offset - line->logfile->font_ascent,
		509	width, step_per_line);
		510	#else /* DEBUG */
		511	XClearArea (disp, root, win_x, win_y + offset - line->logfile->font_ascent,
		512	width + MARGIN_OF_ERROR, step_per_line, False);
		513	#endif /* DEBUG */
		514	}
		515	}
		516
		517	if (opt_outline)
		518	{
		519	int x, y;
		520	XSetForeground (disp, WinGC, black_color);
		521
		522	for (x = -1; x <= 1; x += 2)
		523	for (y = -1; y <= 1; y += 2)
		524	draw_text (disp, root, WinGC,
		525	win_x + effect_x_offset + x,
		526	win_y + y + offset, line, foreground = 0);
		527	}
		528	else if (opt_shade)
		529	{
		530	XSetForeground (disp, WinGC, black_color);
		531	draw_text (disp, root, WinGC,
		532	win_x + effect_x_offset + SHADE_X,
		533	win_y + offset + SHADE_Y, line, foreground = 0);
		534	}
		535
		536	XSetForeground (disp, WinGC, line->logfile->color);
		537	draw_text (disp, root, WinGC,
		538	win_x + effect_x_offset,
		539	win_y + offset, line, foreground = 1);
		540	}
		541	}
		542
		543	if (opt_reverse)
		544	offset += step_per_line;
		545	offset -= line->logfile->font_ascent;
		546
		547	miny += line->logfile->font_height;
		548	maxy -= line->logfile->font_height;
		549
		550	space -= step_per_line;
		551	}
		552
		553	if (space > 0 && clear)
		554	{
		555	#ifdef DEBUG
		556	XSetForeground (disp, WinGC, GetColor ("orange"));
		557	XFillRectangle (disp, root, WinGC, win_x, win_y + offset - (opt_reverse ? 0 : space),
		558	width, space);
		559	#else /* DEBUG */
		560	XClearArea (disp, root, win_x, win_y + offset - (opt_reverse ? 0 : space),
		561	width + MARGIN_OF_ERROR, space, False);
		562	#endif
		563	}
		564
		565	/* at least one of the lines must fit in the allocated area. we've
		566	* already checked at initialisation time that all the fonts are small
		567	* enough to fit at least one line in the display area, but assert it
		568	* again here to be sure */
		569	assert(line != linelist);
		570
		571	/* any lines that didn't just get looked at are never going to be, so break the chain */
		572	if (line) line->prev->next = 0;
		573
		574	/* and throw them all away */
		575	while (line)
		576	{
		577	struct line_node *this = line;
		578	line = line->next;
		579	if (this->logfile && this->logfile->last == this)
		580	this->logfile->last = NULL;
		581	free (this->line);
		582	free (this->breaks);
		583	free (this);
		584	}
		585
		586	if (opt_frame)
		587	{
		588	XSetForeground (disp, WinGC, GetColor (def_color));
		589	/* note that XDrawRectangle() draws a rectangle one pixel bigger
		590	* in both dimensions than you ask for, hence the subtractions.
		591	* XFillRectangle() doesn't suffer from this problem */
		592	XDrawRectangle (disp, root, WinGC, win_x - 0, win_y - 0, width - 1, height - 1);
		593	}
		594	}
		595
		596	#if HAS_REGEX
		597	void
		598	transform_line (char *s)
		599	{
		600	#ifdef I_AM_Md
174	int i;	601	int i;
175		602	if (1)
176	for (i = 0; i < count; i++)
177	{	603	{
178	Atom type;	604	for (i = 16; s[i]; i++)
179	int format;	605	s[i] = s[i + 11];
180	unsigned long nitems, bytes_after_return;
181	unsigned char *virtual_root_window;
182
183	if (XGetWindowProperty (display, windows[i], __SWM_VROOT,
184	0, 1, False, XA_WINDOW, &type, &format,
185	&nitems, &bytes_after_return,
186	&virtual_root_window)
187	== Success)
188	{
189	if (type != None)
190	{
191	if (type == XA_WINDOW)
192	{
193	XFree (windows);
194	return (Window)virtual_root_window;
195	}
196	else
197	fprintf (stderr, "__SWM_VROOT property type mismatch");
198	}
199	}
200	else
201	fprintf (stderr,
202	"failed to get __SWM_VROOT property on window 0x%lx",
203	windows[i]);
204	}	606	}
		607	s[i + 1] = '\0';
		608	#endif
205		609
206	if (count)	610	if (transformre)
207	XFree (windows);	611	{
208	}	612	int i;
		613	regmatch_t matched[16];
		614
		615	i = regexec (transformre, s, 16, matched, 0);
		616	if (i == 0)
		617	{ /* matched */
		618	int match_start = matched[0].rm_so;
		619	int match_end = matched[0].rm_eo;
		620	int old_len = match_end - match_start;
		621	int new_len = strlen (transform_to);
		622	int old_whole_len = strlen (s);
		623
		624	printf ("regexp was matched by '%s' - replace with '%s'\n", s, transform_to);
		625	printf ("match is from %d to %d\n", match_start, match_end);
		626	if (new_len > old_len)
		627	s = xrealloc (s, old_whole_len + new_len - old_len);
		628
		629	if (new_len != old_len)
		630	{
		631	memcpy (s + match_end + new_len - old_len,
		632	s + match_end,
		633	old_whole_len - match_end);
		634	s[old_whole_len + new_len - old_len] = '\0';
		635	}
		636
		637	memcpy (s + match_start,
		638	transform_to,
		639	new_len);
		640	printf ("transformed to '%s'\n", s);
		641	}
209	else	642	else
210	fprintf (stderr, "Can't query tree on root window 0x%lx",	643	printf ("regexp was not matched by '%s'\n", s);
211	real_root_window);
212	}	644	}
		645	}
		646	#endif
		647
		648	/*
		649	* appends p2 to the end of p1, if p1 is not null
		650	* otherwise allocates a new string and copies p2 to it
		651	*/
		652	char *
		653	concat_line (char *p1, const char *p2)
		654	{
		655	int l1 = p1 ? strlen (p1) : 0;
		656	int l2 = strlen (p2);
		657	char *r;
		658
		659	assert (p2);
		660
		661	if (p1)
		662	r = xrealloc(p1, l1 + l2 + 1);
213	else	663	else
214	/* This shouldn't happen. The Xlib documentation is wrong BTW. */	664	r = xmalloc (l2 + 1);
215	fprintf (stderr, "Can't intern atom __SWM_VROOT");
216		665
217	return real_root_window;	666	memcpy (r + l1, p2, l2);
218	}	667	r[l1 + l2] = 0;
219		668
220	void InitWindow(void)
221	{
222	XGCValues gcv;
223	Font font;
224	unsigned long gcm;
225	XFontStruct *info;
226	int screen, ScreenWidth, ScreenHeight;
227
228	if (!(disp = XOpenDisplay(dispname))) {
229	fprintf(stderr, "Can't open display %s.\n", dispname);
230	exit(1);
231	}
232	screen = DefaultScreen(disp);
233	ScreenHeight = DisplayHeight(disp, screen);
234	ScreenWidth = DisplayWidth(disp, screen);
235
236	root = root_window (disp, screen);
237
238	gcm = GCBackground;
239	gcv.graphics_exposures = True;
240	WinGC = XCreateGC(disp, root, gcm, &gcv);
241	XMapWindow(disp, root);
242	XSetForeground(disp, WinGC, GetColor(DEF_COLOR));
243
244	font = XLoadFont(disp, fontname);
245	XSetFont(disp, WinGC, font);
246	info = XQueryFont(disp, font);
247	font_width = info->max_bounds.width;
248	font_descent = info->max_bounds.descent;
249	font_height = info->max_bounds.ascent + font_descent;
250
251	w = width * font_width;
252	h = listlen * font_height;
253
254	if (geom_mask & XNegative)
255	win_x = win_x + ScreenWidth - w;
256	if (geom_mask & YNegative)
257	win_y = win_y + ScreenHeight - h;
258
259	XSelectInput(disp, root, ExposureMask|FocusChangeMask);
260	}
261
262	char *
263	detabificate (char *s)
264	{
265	char * out;
266	int i, j;
267
268	out = malloc (8 * strlen (s) + 1);
269
270	for(i = 0, j = 0; s[i]; i++)
271	{
272	if (s[i] == '\t')
273	do
274	out[j++] = ' ';
275	while (j % 8);
276	else
277	out[j++] = s[i];
278	}
279
280	out[j] = '\0';
281	return out;	669	return r;
282	}	670	}
283		671
284	/*	672	/*
285	* redraw does a complete redraw, rather than an update (i.e. the area	673	* This routine can read a line of any length if it is called enough times.
286	* gets cleared first)
287	* the rest is handled by regular refresh()'es
288	*/	674	*/
289	void redraw(void)	675	int
		676	lineinput (struct logfile_entry *logfile)
290	{	677	{
291	XClearArea(disp, root, win_x, win_y, w, h + font_descent + 2, True);	678	char buff[1024], *p;
292	}	679	int ch;
		680	/* HACK-2: add on the length of any partial line which we will be appending to */
		681	int ofs = logfile->buf ? strlen (logfile->buf) : 0;
293		682
294	/* Just redraw everything without clearing (i.e. after an EXPOSE event) */	683	/* this loop ensures that the whole line is read, even if it's
295	void refresh(struct linematrix *lines, int miny, int maxy)	684	* longer than the buffer. we need to do this because when --whole
296	{	685	* is in effect we don't know whether to display the line or not
297	int lin;	686	* until we've seen how (ie. whether) it ends */
298	int offset = (listlen + 1) * font_height;	687	do
299	unsigned long black_color = GetColor("black");	688	{
300		689	p = buff;
301	miny -= win_y + font_height;	690	do
302	maxy -= win_y - font_height;
303
304	for (lin = listlen; lin--;)
305	{	691	{
306	char *temp;	692	ch = fgetc (logfile->fp);
307		693
308	offset -= font_height;	694	if (ch == '\n' || ch == EOF)
309		695	break;
310	if (offset < miny || offset > maxy)	696	else if (ch == '\r')
311	continue;	697	continue; /* skip */
312		698	else if (ch == '\t')
313	#define LIN ((opt_reverse)?(listlen-lin-1):(lin))
314	temp = detabificate (lines[LIN].line);
315
316	if (opt_shade)
317	{	699	{
318	XSetForeground (disp, WinGC, black_color);	700	do
319	#if 0	701	{
320	XmbDrawString (disp, root, fontset, WinGC, win_x + 2, win_y + offset + 2,	702	*p++ = ' ';
321	temp, strlen (temp));	703	ofs++;
		704	}
		705	while (ofs & 7);
		706	}
		707	else
		708	{
		709	*p++ = ch;
		710	ofs++;
		711	}
		712	}
		713	while (p < buff + (sizeof buff) - 8 - 1);
		714
		715	if (p == buff && ch == EOF)
		716	return 0;
		717
		718	*p = 0;
		719
		720	p = logfile->buf = concat_line (logfile->buf, buff);
		721	}
		722	while (ch != '\n' && ch != EOF);
		723
		724	logfile->lastpartial = logfile->partial;
		725	/* there are 3 ways we could have exited the loop: reading '\n',
		726	* reaching EOF, or filling the buffer; the 2nd and 3rd of these
		727	* both result in a partial line */
		728	logfile->partial = ch != '\n';
		729
		730	if (logfile->partial && opt_whole)
		731	return 0;
		732
		733	#if HAS_REGEX
		734	transform_line (logfile->buf);
322	#endif	735	#endif
323	XDrawString (disp, root, WinGC, win_x + 2, win_y + offset + 2,
324	temp, strlen (temp));
325	}
326
327	XSetForeground (disp, WinGC, lines[LIN].color);
328	#if 0
329	XmbDrawString (disp, root, fontset, WinGC, win_x, win_y + offset,
330	temp, strlen (temp));
331	#endif
332	XDrawString (disp, root, WinGC, win_x, win_y + offset,
333	temp, strlen (temp));
334	free (temp);
335	}
336
337	if (opt_frame) {
338	int bot_y = win_y + h + font_descent + 2;
339
340	XDrawLine(disp, root, WinGC, win_x, win_y, win_x + w, win_y);
341	XDrawLine(disp, root, WinGC, win_x + w, win_y, win_x + w, bot_y);
342	XDrawLine(disp, root, WinGC, win_x + w, bot_y, win_x, bot_y);
343	XDrawLine(disp, root, WinGC, win_x, bot_y, win_x, win_y);
344	}
345	}
346
347	#if HAS_REGEX
348	void transform_line(char *s)
349	{
350	#ifdef I_AM_Md
351	int i;
352	if (1) {
353	for (i = 16; s[i]; i++)
354	s[i] = s[i + 11];
355	}
356	s[i + 1] = '\0';
357	#endif
358
359	if (transformre) {
360	int i;
361	regmatch_t matched[16];
362
363	i = regexec(&transformre, string, 16, matched, 0);
364	if (i == 0) { /* matched */
365	}
366	}
367	}
368	#endif
369
370
371	/*
372	* This routine should read 'width' characters and not more. However,
373	* we really want to read width + 1 characters if the last char is a '\n',
374	* which we should remove afterwards. So, read width+1 chars and ungetc
375	* the last character if it's not a newline. This means 'string' must be
376	* width + 2 wide!
377	*/
378	int lineinput(char *string, int slen, FILE *f)
379	{
380	int len;
381
382	do {
383	if (fgets(string, slen, f) == NULL) /* EOF or Error */
384	return 0;	736	return 1;
385
386	len = strlen(string);
387	} while (len == 0);
388
389	if (string[len - 1] == '\n')
390	string[len - 1] = '\0'; /* erase newline */
391	else if (len >= slen - 1) {
392	ungetc(string[len - 1], f);
393	string[len - 1] = '\0';
394	}
395
396	#if HAS_REGEX
397	transform_line(string);
398	#endif
399	return len;
400	}	737	}
401		738
402	/* input: reads file->fname	739	/* input: reads file->fname
403	* output: fills file->fp, file->inode	740	* output: fills file->fp, file->inode
404	* returns file->fp	741	* returns file->fp
405	* in case of error, file->fp is NULL	742	* in case of error, file->fp is NULL
406	*/	743	*/
		744	FILE *
407	FILE *openlog(struct logfile_entry *file)	745	openlog (struct logfile_entry * file)
408	{	746	{
409	struct stat stats;	747	struct stat stats;
410		748
411	if ((file->fp = fopen(file->fname, "r")) == NULL) {	749	if ((file->fp = fopen (file->fname, "r")) == NULL)
		750	{
412	file->fp = NULL;	751	file->fp = NULL;
413	return NULL;	752	return NULL;
414	}	753	}
415		754
416	fstat(fileno(file->fp), &stats);	755	fstat (fileno (file->fp), &stats);
417	if (S_ISFIFO(stats.st_mode)) {	756	if (S_ISFIFO (stats.st_mode))
		757	{
418	if (fcntl(fileno(file->fp), F_SETFL, O_NONBLOCK) < 0)	758	if (fcntl (fileno (file->fp), F_SETFL, O_NONBLOCK) < 0)
419	perror("fcntl"), exit(1);	759	perror ("fcntl"), exit (1);
420	file->inode = 0;	760	file->inode = 0;
		761	}
421	} else	762	else
422	file->inode = stats.st_ino;	763	file->inode = stats.st_ino;
423		764
424	if (opt_noinitial)	765	if (opt_noinitial)
425	fseek (file->fp, 0, SEEK_END);	766	fseek (file->fp, 0, SEEK_END);
426	else if (stats.st_size > (listlen + 1) * width)	767	else /* if (stats.st_size > (listlen + 1) * width)
427	{	768	* HACK - 'width' is in pixels - how are we to know how much text will fit?
428	char dummy[255];
429
430	fseek(file->fp, -((listlen + 2) * width), SEEK_END);	769	* fseek (file->fp, -((listlen + 2) * width/10), SEEK_END); */
431	/* the pointer might point halfway some line. Let's	770	fseek (file->fp, -5000, SEEK_END);
432	be nice and skip this damaged line */
433	lineinput(dummy, sizeof(dummy), file->fp);
434	}
435		771
436	file->last_size = stats.st_size;	772	file->last_size = stats.st_size;
437	return file->fp;	773	return file->fp;
438	}	774	}
439		775
		776	void
440	void reopen(void)	777	reopen (void)
441	{	778	{
442	struct logfile_entry *e;	779	struct logfile_entry *e;
443		780
444	for (e = loglist; e; e = e->next) {	781	for (e = loglist; e; e = e->next)
		782	{
445	if (!e->inode)	783	if (!e->inode)
446	continue; /* skip stdin */	784	continue; /* skip stdin */
447		785
448	if (e->fp)	786	if (e->fp)
449	fclose(e->fp);	787	fclose (e->fp);
450	/* if fp is NULL we will try again later */	788	/* if fp is NULL we will try again later */
451	openlog(e);	789	openlog (e);
452	}	790	}
453		791
454	do_reopen = 0;	792	do_reopen = 0;
455	}	793	}
456		794
		795	void
457	void check_open_files(void)	796	check_open_files (void)
458	{	797	{
459	struct logfile_entry *e;	798	struct logfile_entry *e;
460	struct stat stats;	799	struct stat stats;
461		800
462	for (e = loglist; e; e = e->next) {	801	for (e = loglist; e; e = e->next)
		802	{
463	if (!e->inode)	803	if (!e->inode)
464	continue; /* skip stdin */	804	continue; /* skip stdin */
465		805
466	if (stat(e->fname, &stats) < 0) { /* file missing? */	806	if (stat (e->fname, &stats) < 0)
		807	{ /* file missing? */
467	sleep(1);	808	sleep (1);
468	if (e->fp)	809	if (e->fp)
469	fclose(e->fp);	810	fclose (e->fp);
470	if (openlog(e) == NULL)	811	if (openlog (e) == NULL)
471	break;	812	continue;
472	}	813	if (fstat (fileno (e->fp), &stats) < 0)
		814	continue;
		815	}
473		816
474	if (stats.st_ino != e->inode) { /* file renamed? */	817	if (stats.st_ino != e->inode)
		818	{ /* file renamed? */
475	if (e->fp)	819	if (e->fp)
476	fclose(e->fp);	820	fclose (e->fp);
477	if (openlog(e) == NULL)	821	if (openlog (e) == NULL)
478	break;	822	continue;
479	}	823	if (fstat (fileno (e->fp), &stats) < 0)
		824	continue;
		825	}
480		826
481	if (stats.st_size < e->last_size) { /* file truncated? */	827	if (stats.st_size < e->last_size)
		828	{ /* file truncated? */
482	fseek(e->fp, 0, SEEK_SET);	829	fseek (e->fp, 0, SEEK_SET);
483	e->last_size = stats.st_size;	830	e->last_size = stats.st_size;
484	}	831	}
		832	}
		833	}
		834
		835	/*
		836	* insert a single node in the list of screen lines and return a
		837	* pointer to the new node.
		838	* the caller MUST then fill in ret->line and ret->len with valid
		839	* data.
		840	*/
		841	static struct line_node *
		842	new_line_node (struct logfile_entry *log)
		843	{
		844	struct line_node *new = xmalloc (sizeof (struct line_node));
		845
		846	new->logfile = log;
		847	new->wrapped_left = 0;
		848	new->wrapped_right = 0;
		849	new->breaks = 0;
		850
		851	assert(log);
		852
		853	if (!log || !log->last)
485	}	854	{
486	}	855	new->next = linelist;
		856	new->next->prev = new;
487		857
488	#define SCROLL_UP(lines, listlen) \	858	new->prev = NULL;
489	{ \	859	linelist = new;
490	int cur_line; \	860	}
491	for (cur_line = 0; cur_line < (listlen - 1); cur_line++) { \	861	else
492	strcpy(lines[cur_line].line, lines[cur_line + 1].line); \	862	{
493	lines[cur_line].color = lines[cur_line + 1].color; \	863	/* 2 pointers from the new node */
494	} \	864	new->next = log->last;
495	}	865	new->prev = log->last->prev;
496		866
		867	/* 2 pointers back to the new node */
		868	if (new->next) new->next->prev = new;
		869	if (new->prev) new->prev->next = new;
		870
		871	/* if this is a new first entry in the list then update
		872	* 'linelist' */
		873	if (log->last == linelist)
		874	linelist = new;
		875	}
		876
		877	/* update the logfile record */
		878	if (log)
		879	log->last = new;
		880
		881	return new;
		882	}
		883
		884	/*
		885	* this is called after either adding a new line or appending to an
		886	* old one. in both cases it's possible that the line no longer fits,
		887	* and needs wrapping. this function checks the last line associated
		888	* with the supplied logfile.
		889	*/
		890	static void
		891	possibly_split_long_line (struct logfile_entry *log)
		892	{
		893	char *str = log->last->line;
		894	int l = strlen (str);
		895	char *p = str;
		896	struct line_node *line;
		897	int spaces;
		898	static struct breakinfo *breaks;
		899	static int break_buffer_size;
		900
		901	/* only calculate the continuation's width once */
		902	if (continuation_width == -1)
		903	{
		904	continuation_length = strlen (continuation);
		905	continuation_width = XmbTextEscapement (log->fontset, continuation, continuation_length);
		906	continuation_color = GetColor (cont_color);
		907
		908	/* make an array to store information about the location of
		909	* spaces in the line */
		910	if (opt_justify)
		911	{
		912	break_buffer_size = 32;
		913	breaks = xmalloc (break_buffer_size * sizeof (struct breakinfo));
		914	}
		915	}
		916
		917	do
		918	{
		919	const char *beg = p;
		920	int start_w = log->last->wrapped_left ? continuation_width : 0;
		921	int w = start_w;
		922	int wrapped = 0;
		923	char *break_p = NULL;
		924	int width_at_break_p = 0;
		925	int prefix_len;
		926
		927	spaces = 0;
		928
		929	if (opt_justify)
		930	breaks[spaces].index = breaks[spaces].width = 0;
		931
		932	while (*p)
		933	{
		934	int cw, len;
		935
		936	/* find the length in bytes of the next multibyte character */
		937	len = mblen (p, l);
		938	if (len <= 0)
		939	len = 1; /* ignore (don't skip) illegal character sequences */
		940
		941	/* find the width in pixels of the next character */
		942	cw = XmbTextEscapement (log->fontset, p, len);
		943	if (opt_wordwrap && len == 1 && p[0] == ' ' && p != break_p + 1)
		944	{
		945	break_p = p;
		946	width_at_break_p = w;
		947	spaces++;
		948
		949	if (opt_justify)
		950	{
		951	/* increase the size of the 'breaks' array when
		952	* necessary */
		953	if (spaces >= break_buffer_size)
		954	{
		955	break_buffer_size *= 1.5;
		956	breaks = xrealloc (breaks, break_buffer_size * sizeof (struct breakinfo));
		957	}
		958
		959	/* store information about (a) the location of each
		960	* space */
		961	breaks[spaces].index = p + 1 - beg;
		962	/* (b) the width (in pixels) of the string up to
		963	* this space */
		964	breaks[spaces].width = cw + w - start_w;
		965	/* (c) the length of each 'word' */
		966	breaks[spaces-1].len = breaks[spaces].index - breaks[spaces-1].index;
		967	}
		968	}
		969
		970	if (cw + w > width - effect_x_space)
		971	{
		972	if (p == beg)
		973	{
		974	fprintf (stderr, "we can't even fit a single character onto the line\n");
		975	if (len == 1) fprintf (stderr, "(the character we couldn't fit was '%c')\n", *p);
		976	exit (1);
		977	}
		978
		979	wrapped = 1;
		980	break;
		981	}
		982
		983	w += cw;
		984	p += len;
		985	l -= len;
		986	}
		987
		988	/* if we're wrapping at spaces, and the line is long enough to
		989	* wrap, and we've seen a space already, and the space wasn't
		990	* the first character on the line, then wrap at the space */
		991	if (!wrapped)
		992	break;
		993
		994	/* choose where to break the line */
		995	if (opt_wordwrap && break_p && break_p != beg)
		996	{
		997	prefix_len = break_p - beg;
		998	p = break_p;
		999	w = width_at_break_p;
		1000
		1001	/* if breaking at a space, skip all adjacent spaces */
		1002	while (*p == ' ')
		1003	{
		1004	int len = mblen (p, l);
		1005	if (len != 1) break;
		1006	p++;
		1007	}
		1008
		1009	if (opt_justify)
		1010	{
		1011	spaces--;
		1012	breaks[spaces].len--;
		1013	}
		1014	}
		1015	else
		1016	prefix_len = p - beg;
		1017
		1018	/* make a copy of the tail end of the string */
		1019	p = xstrdup (p);
		1020
		1021	/* and reduce the size of the head of the string */
		1022	log->last->line = xrealloc (log->last->line, prefix_len + 1);
		1023	log->last->len = prefix_len;
		1024	log->last->line[prefix_len] = '\0';
		1025
		1026	/* note that the head was wrapped on it's right */
		1027	log->last->wrapped_right = 1;
		1028
		1029	/* 'spaces' includes any space we broke on; we can only justify
		1030	* if there's at least one other space */
		1031	if (opt_justify && spaces &&
		1032	width - effect_x_space - width_at_break_p < spaces * log->font_height)
		1033	{
		1034	int i;
		1035	log->last->free_pixels = width - effect_x_space - w;
		1036	log->last->num_words = spaces + 1;
		1037	log->last->breaks = malloc (log->last->num_words * sizeof (struct breakinfo));
		1038	for (i = 0; i < log->last->num_words; i++)
		1039	log->last->breaks[i] = breaks[i];
		1040	}
		1041
		1042	line = new_line_node (log);
		1043	line->line = p;
		1044	l = line->len = strlen (p);
		1045
		1046	/* note that the tail end of the string is wrapped at its left */
		1047	line->wrapped_left = 1;
		1048	}
		1049	while (l);
		1050	}
		1051
		1052	static void
		1053	insert_new_line (char *str, struct logfile_entry *log)
		1054	{
		1055	struct line_node *new;
		1056	new = new_line_node (log);
		1057	new->line = str;
		1058	new->len = strlen (str);
		1059
		1060	possibly_split_long_line (log);
		1061	}
		1062
		1063	/*
		1064	* append something to an existing physical line. this is done
		1065	* by deleting the file on-screen, concatenating the new data to it
		1066	* and splitting it again.
		1067	*/
		1068	static void
		1069	append_to_existing_line (char *str, struct logfile_entry *log)
		1070	{
		1071	char *old, *new;
		1072
		1073	assert(log);
		1074	assert(log->last);
		1075
		1076	old = log->last->line;
		1077	assert(old);
		1078
		1079	new = concat_line (old, str);
		1080	free (str);
		1081	log->last->line = new;
		1082	log->last->len = strlen (new);
		1083	possibly_split_long_line (log);
		1084	}
		1085
		1086	static void
497	void main_loop(void)	1087	main_loop (void)
498	{	1088	{
499	struct linematrix *lines = xmalloc(sizeof(struct linematrix) * listlen);	1089	int lin;
500	int lin, miny, maxy, buflen;
501	char *buf;
502	time_t lastreload;	1090	time_t lastreload;
503	Region region = XCreateRegion();	1091	Region region = XCreateRegion ();
504	XEvent xev;	1092	XEvent xev;
505		1093	struct logfile_entry *lastprinted = NULL;
506	maxy = 0;
507	miny = win_y + h;
508	buflen = width + 2;
509	buf = xmalloc(buflen);
510	lastreload = time(NULL);
511
512	/* Initialize linematrix */
513	for (lin = 0; lin < listlen; lin++) {
514	lines[lin].line = xmalloc(buflen);
515	strcpy(lines[lin].line, "~");
516	lines[lin].color = GetColor(def_color);
517	}
518
519	if (!opt_noinitial)
520	{
521	while (lineinput(buf, buflen, loglist->fp) != 0) {
522	SCROLL_UP(lines, listlen);
523	/* print the next line */
524	strcpy(lines[listlen - 1].line, buf);
525	}
526
527	redraw ();
528	}
529
530	for (;;) {
531	int need_update = 0;
532	struct logfile_entry *current;	1094	struct logfile_entry *current;
533	static struct logfile_entry *lastprinted = NULL;	1095	int need_update = 1;
534		1096
		1097	display = xmalloc (sizeof (struct displaymatrix) * listlen);
		1098
		1099	lastreload = time (NULL);
		1100
		1101	/* Initialize line_node */
		1102	for (lin = 0; lin < listlen; lin++)
		1103	{
		1104	struct line_node *e = xmalloc (sizeof (struct line_node));
		1105	e->line = xstrdup ("~");
		1106	e->len = 1;
		1107	e->logfile = loglist; /* this is only needed to get a color for the '~' */
		1108	e->wrapped_left = 0;
		1109	e->wrapped_right = 0;
		1110	e->breaks = 0;
		1111	e->next = NULL;
		1112	e->prev = linelist_tail;
		1113
		1114	if (!linelist)
		1115	linelist = e;
		1116	if (linelist_tail)
		1117	linelist_tail->next = e;
		1118	linelist_tail = e;
		1119
		1120	display[lin].line = xstrdup ("");
		1121	display[lin].len = 0;
		1122	display[lin].offset = 0;
		1123	display[lin].buffer_size = 0;
		1124	}
		1125
		1126	for (;;)
		1127	{
535	/* read logs */	1128	/* read logs */
536	for (current = loglist; current; current = current->next) {	1129	for (current = loglist; current; current = current->next)
		1130	{
537	if (!current->fp)	1131	if (!current->fp)
538	continue; /* skip missing files */	1132	continue; /* skip missing files */
539		1133
540	clearerr(current->fp);	1134	clearerr (current->fp);
541		1135
542	while (lineinput(buf, buflen, current->fp) != 0) {	1136	while (lineinput (current))
		1137	{
		1138	need_update = 1;
		1139	/* if we're trying to update old partial lines in
		1140	* place, and the last time this file was updated the
		1141	* output was partial, and that partial line is not
		1142	* too close to the top of the screen, then update
		1143	* that partial line */
		1144	if (opt_update && current->lastpartial && current->last)
		1145	{
		1146	append_to_existing_line (current->buf, current);
		1147	current->buf = 0;
		1148	continue;
		1149	}
		1150
		1151	/* if all we just read was a newline ending a line that we've already displayed, skip it */
		1152	if (current->buf[0] == '\0' && current->lastpartial)
		1153	{
		1154	free(current->buf);
		1155	current->buf = 0;
		1156	continue;
		1157	}
		1158
543	/* print filename if any, and if last line was from	1159	/* print filename if any, and if last line was from
544	different file */	1160	* different file */
545	if (!opt_nofilename &&	1161	if (lastprinted != current)
546	!(lastprinted && lastprinted == current) &&	1162	{
547	current->desc[0]) {	1163	current->last = 0;
548	SCROLL_UP(lines, listlen);	1164	if (!opt_nofilename && current->desc[0])
549	sprintf(lines[listlen - 1].line, "[%s]", current->desc);	1165	{
550	lines[listlen - 1].color = current->color;	1166	insert_new_line (xstrdup ("["), current);
		1167	append_to_existing_line (xstrdup (current->desc), current);
		1168	append_to_existing_line (xstrdup ("]"), current);
		1169	}
551	}	1170	}
552		1171
553	SCROLL_UP(lines, listlen);	1172	/* if we're dealing with partial lines, and the last
554	strcpy(lines[listlen - 1].line, buf);	1173	* time we showed the line it wasn't finished ... */
555	lines[listlen - 1].color = current->color;	1174	if (!opt_whole && current->lastpartial)
		1175	{
		1176	/* if this is the same file we showed last then
		1177	append to the last line shown */
		1178	if (lastprinted == current)
		1179	append_to_existing_line (current->buf, current);
		1180	else
		1181	{
		1182	/* but if a different file has been shown in the
		1183	* mean time, make a new line, starting with the
		1184	* continuation string */
		1185	insert_new_line (current->buf, current);
		1186	current->last->wrapped_left = 1;
		1187	}
		1188	}
		1189	else
		1190	/* otherwise just make a plain and simple new line */
		1191	insert_new_line (current->buf, current);
556		1192
557	lastprinted = current;	1193	current->buf = 0;
558	need_update = 1;	1194	lastprinted = current;
559	}	1195	}
560	}	1196	}
561		1197
562	if (need_update)	1198	if (need_update)
563	redraw();	1199	{
564	else {	1200	redraw (0);
		1201	need_update = 0;
		1202	}
		1203	else
		1204	{
565	XFlush(disp);	1205	XFlush (disp);
		1206
566	if (!XPending(disp)) {	1207	if (!XPending (disp))
567	fd_set fdr;	1208	{
		1209	fd_set fdr;
568	struct timeval to = interval;	1210	struct timeval to = interval;
569		1211
570	FD_ZERO(&fdr);	1212	FD_ZERO (&fdr);
571	FD_SET(ConnectionNumber(disp), &fdr);	1213	FD_SET (ConnectionNumber (disp), &fdr);
572	select(ConnectionNumber(disp) + 1, &fdr, 0, 0, &to);	1214	select (ConnectionNumber (disp) + 1, &fdr, 0, 0, &to);
573	}	1215	}
574	}	1216	}
575		1217
576	check_open_files();	1218	check_open_files ();
577		1219
578	if (do_reopen)	1220	if (do_reopen)
579	reopen();	1221	reopen ();
580		1222
581	/* we ignore possible errors due to window resizing &c */	1223	/* we ignore possible errors due to window resizing &c */
582	while (XPending(disp)) {	1224	while (XPending (disp))
		1225	{
583	XNextEvent(disp, &xev);	1226	XNextEvent (disp, &xev);
		1227
584	switch (xev.type) {	1228	switch (xev.type)
		1229	{
585	case Expose:	1230	case Expose:
586	{	1231	{
587	XRectangle r;	1232	XRectangle r;
588		1233
589	r.x = xev.xexpose.x;	1234	r.x = xev.xexpose.x;
590	r.y = xev.xexpose.y;	1235	r.y = xev.xexpose.y;
591	r.width = xev.xexpose.width;	1236	r.width = xev.xexpose.width;
592	r.height = xev.xexpose.height;	1237	r.height = xev.xexpose.height;
		1238
593	XUnionRectWithRegion(&r, region, region);	1239	XUnionRectWithRegion (&r, region, region);
594	if (miny > r.y)	1240	}
595	miny = r.y;	1241	break;
596	if (maxy < r.y + r.height)	1242	default:
597	maxy = r.y + r.height;
598	}
599	break;
600	default:
601	#ifdef DEBUGMODE	1243	#ifdef DEBUGMODE
602	fprintf(stderr, "PANIC! Unknown event %d\n", xev.type);	1244	fprintf (stderr, "PANIC! Unknown event %d\n", xev.type);
603	#endif	1245	#endif
604	break;	1246	break;
		1247	}
		1248	}
		1249
		1250	/* reload if requested */
		1251	if (reload && lastreload + reload < time (NULL))
		1252	{
		1253	if (command && command[0])
		1254	system (command);
		1255
		1256	reopen ();
		1257	lastreload = time (NULL);
		1258	}
		1259
		1260	if (!XEmptyRegion (region))
		1261	{
		1262	XRectangle r;
		1263
		1264	XSetRegion (disp, WinGC, region);
		1265	XClipBox (region, &r);
		1266
		1267	refresh (r.y, r.y + r.height, 0, 1);
		1268
		1269	XDestroyRegion (region);
		1270	region = XCreateRegion ();
		1271	}
605	}	1272	}
606	}
607
608	/* reload if requested */
609	if (reload && lastreload + reload < time(NULL)) {
610	if (command)
611	system(command);
612
613	reopen();
614	lastreload = time(NULL);
615	}
616
617	if (!XEmptyRegion(region)) {
618	XSetRegion(disp, WinGC, region);
619	refresh(lines, miny, maxy);
620	XDestroyRegion(region);
621	region = XCreateRegion();
622	maxy = 0;
623	miny = win_y + h;
624	}
625	}
626	}	1273	}
627		1274
628		1275
		1276	int
629	int main(int argc, char *argv[])	1277	main (int argc, char *argv[])
630	{	1278	{
631	int i;	1279	int i;
632	int opt_daemonize = 0;	1280	int opt_daemonize = 0;
		1281	int opt_partial = 0, file_count = 0;
633	#if HAS_REGEX	1282	#if HAS_REGEX
634	char *transform = NULL;	1283	char *transform = NULL;
635	#endif	1284	#endif
636		1285
637	setlocale (LC_CTYPE, ""); /* try to initialize the locale. */	1286	setlocale (LC_CTYPE, ""); /* try to initialize the locale. */
638		1287
639	/* window needs to be initialized before colorlookups can be done */
640	/* just a dummy to get the color lookups right */
641	geom_mask = NoValue;
642	InitWindow();
643
644	for (i = 1; i < argc; i++) {	1288	for (i = 1; i < argc; i++)
		1289	{
645	const char *arg = argv[i];	1290	const char *arg = argv[i];
646		1291
647	if (arg[0] == '-' && arg[1] != '\0' && arg[1] != ',') {	1292	if (arg[0] == '-' && arg[1] != '\0' && arg[1] != ',')
		1293	{
648	if (arg[1] == '-')	1294	if (arg[1] == '-')
649	arg++;	1295	arg++;
650		1296
651	if (!strcmp(arg, "-?") ||	1297	if (!strcmp (arg, "-?") ||
652	!strcmp(arg, "-help") || !strcmp(arg, "-h"))	1298	!strcmp (arg, "-help") || !strcmp (arg, "-h"))
653	display_help(argv[0]);	1299	display_help (argv[0]);
654	else if (!strcmp(arg, "-V"))	1300	else if (!strcmp (arg, "-V"))
655	display_version();	1301	display_version ();
656	else if (!strcmp(arg, "-g") || !strcmp(arg, "-geometry"))	1302	else if (!strcmp (arg, "-g") || !strcmp (arg, "-geometry"))
657	geom_mask = XParseGeometry(argv[++i],	1303	geom_mask =
658	&win_x, &win_y, &width, &listlen);	1304	XParseGeometry (argv[++i], &win_x, &win_y, &width, &height);
659	else if (!strcmp(arg, "-display"))	1305	else if (!strcmp (arg, "-display"))
660	dispname = argv[++i];	1306	dispname = argv[++i];
		1307	else if (!strcmp (arg, "-cont"))
		1308	continuation = argv[++i];
		1309	else if (!strcmp (arg, "-cont-color"))
		1310	cont_color = argv[++i];
661	else if (!strcmp(arg, "-font") || !strcmp(arg, "-fn"))	1311	else if (!strcmp (arg, "-font") || !strcmp (arg, "-fn"))
662	fontname = argv[++i];	1312	fontname = argv[++i];
663	#if HAS_REGEX	1313	#if HAS_REGEX
664	else if (!strcmp(arg, "-t"))	1314	else if (!strcmp (arg, "-t"))
665	transform = argv[++i];	1315	{
		1316	transform = argv[++i];
		1317	transform_to = argv[++i];
		1318	printf ("transform: '%s' to '%s'\n", transform, transform_to);
		1319	}
666	#endif	1320	#endif
667	else if (!strcmp(arg, "-fork") || !strcmp(arg, "-f"))	1321	else if (!strcmp (arg, "-fork") || !strcmp (arg, "-f"))
668	opt_daemonize = 1;	1322	opt_daemonize = 1;
669	else if (!strcmp(arg, "-reload")) {	1323	else if (!strcmp (arg, "-reload"))
670	reload = atoi(argv[++i]);	1324	{
671	command = argv[++i];	1325	reload = atoi (argv[++i]);
672	}	1326	command = argv[++i];
		1327	}
673	else if (!strcmp(arg, "-shade"))	1328	else if (!strcmp (arg, "-shade"))
674	opt_shade = 1;	1329	opt_shade = 1;
		1330	else if (!strcmp (arg, "-outline"))
		1331	opt_outline = 1;
		1332	else if (!strcmp (arg, "-minspace"))
		1333	opt_minspace = 1;
		1334	else if (!strcmp (arg, "-noflicker"))
		1335	opt_noflicker = 1;
675	else if (!strcmp(arg, "-frame"))	1336	else if (!strcmp (arg, "-frame"))
676	opt_frame = 1;	1337	opt_frame = 1;
677	else if (!strcmp(arg, "-no-filename"))	1338	else if (!strcmp (arg, "-no-filename"))
678	opt_nofilename = 1;	1339	opt_nofilename = 1;
679	else if (!strcmp(arg, "-reverse"))	1340	else if (!strcmp (arg, "-reverse"))
680	opt_reverse = 1;	1341	opt_reverse = 1;
		1342	else if (!strcmp (arg, "-whole"))
		1343	opt_whole = 1;
		1344	else if (!strcmp (arg, "-partial"))
		1345	opt_partial = 1;
		1346	else if (!strcmp (arg, "-update"))
		1347	opt_update = opt_partial = 1;
		1348	else if (!strcmp (arg, "-wordwrap"))
		1349	opt_wordwrap = 1;
		1350	else if (!strcmp (arg, "-justify"))
		1351	opt_justify = 1;
681	else if (!strcmp(arg, "-color"))	1352	else if (!strcmp (arg, "-color"))
682	def_color = argv[++i];	1353	def_color = argv[++i];
683	else if (!strcmp(arg, "-noinitial"))	1354	else if (!strcmp (arg, "-noinitial"))
684	opt_noinitial = 1;	1355	opt_noinitial = 1;
685	else if (!strcmp(arg, "-id"))	1356	else if (!strcmp (arg, "-id"))
686	root = atoi (argv[++i]);	1357	{
		1358	unsigned long id;
		1359
		1360	if (sscanf (argv[++i], "%li", &id) == 1 && id)
		1361	root = id;
		1362	}
687	else if (!strcmp(arg, "-interval") || !strcmp(arg, "-i")) {	1363	else if (!strcmp (arg, "-interval") || !strcmp (arg, "-i"))
		1364	{
688	double iv = atof(argv[++i]);	1365	double iv = atof (argv[++i]);
689		1366
690	interval.tv_sec = (int) iv;	1367	interval.tv_sec = (int) iv;
691	interval.tv_usec = (iv - interval.tv_sec) * 1e6;	1368	interval.tv_usec = (iv - interval.tv_sec) * 1e6;
692	} else {	1369	}
		1370	else
		1371	{
693	fprintf(stderr, "Unknown option '%s'.\n"	1372	fprintf (stderr, "Unknown option '%s'.\n"
694	"Try --help for more information.\n", arg);	1373	"Try --help for more information.\n", arg);
695	exit(1);	1374	exit (1);
696	}	1375	}
697	} else { /* it must be a filename */	1376	}
		1377	else
		1378	{ /* it must be a filename */
698	struct logfile_entry *e;	1379	struct logfile_entry *e;
699	const char *fname, *desc, *fcolor = def_color;	1380	const char *fname, *desc, *fcolor = def_color;
700	char *p;	1381	char *p;
701		1382
		1383	file_count++;
		1384
702	/* this is not foolproof yet (',' in filenames are not allowed) */	1385	/* this is not foolproof yet (',' in filenames are not allowed) */
703	fname = desc = arg;	1386	fname = desc = arg;
704	if ((p = strchr(arg, ','))) {	1387	if ((p = strchr (arg, ',')))
705	*p = '\0';	1388	{
706	fcolor = p + 1;	1389	*p = '\0';
		1390	fcolor = p + 1;
707		1391
708	if ((p = strchr(fcolor, ','))) {	1392	if ((p = strchr (fcolor, ',')))
709	*p = '\0';	1393	{
710	desc = p + 1;	1394	*p = '\0';
711	}	1395	desc = p + 1;
712	}	1396	}
		1397	}
713		1398
714	e = xmalloc(sizeof(struct logfile_entry));	1399	e = xmalloc (sizeof (struct logfile_entry));
		1400	e->partial = 0;
		1401	e->buf = 0;
		1402
715	if (arg[0] == '-' && arg[1] == '\0') {	1403	if (arg[0] == '-' && arg[1] == '\0')
		1404	{
716	if ((e->fp = fdopen(0, "r")) == NULL)	1405	if ((e->fp = fdopen (0, "r")) == NULL)
717	perror("fdopen"), exit(1);	1406	perror ("fdopen"), exit (1);
718	if (fcntl(0, F_SETFL, O_NONBLOCK) < 0)	1407	if (fcntl (0, F_SETFL, O_NONBLOCK) < 0)
719	perror("fcntl"), exit(1);	1408	perror ("fcntl"), exit (1);
720	e->fname = NULL;	1409
721	e->inode = 0;	1410	e->fname = NULL;
		1411	e->inode = 0;
		1412	if (desc == arg)
722	e->desc = xstrdup("stdin");	1413	e->desc = xstrdup ("stdin");
723	} else {	1414	else
724	int l;	1415	e->desc = xstrdup (desc);
725		1416	}
		1417	else
		1418	{
726	e->fname = xstrdup(fname);	1419	e->fname = xstrdup (fname);
727	if (openlog(e) == NULL)	1420
		1421	if (openlog (e) == NULL)
728	perror(fname), exit(1);	1422	perror (fname), exit (1);
729		1423
730	l = strlen(desc);	1424	e->desc = xstrdup (desc);
731	if (l > width - 2) /* must account for [ ] */	1425	}
732	l = width - 2;	1426
733	e->desc = xmalloc(l + 1);	1427	e->colorname = fcolor;
734	memcpy(e->desc, desc, l);	1428	e->partial = 0;
735	*(e->desc + l) = '\0';	1429	e->fontname = fontname;
		1430	e->last = NULL;
		1431	e->next = NULL;
		1432
		1433	if (!loglist)
		1434	loglist = e;
		1435	if (loglist_tail)
		1436	loglist_tail->next = e;
		1437
		1438	loglist_tail = e;
		1439	}
736	}	1440	}
737		1441
738	e->color = GetColor(fcolor);
739	e->next = NULL;
740
741	if (!loglist)	1442	if (!loglist)
742	loglist = e;
743	if (loglist_tail)
744	loglist_tail->next = e;
745	loglist_tail = e;
746	}
747	}	1443	{
748
749	if (!loglist) {
750	fprintf(stderr, "You did not specify any files to tail\n"	1444	fprintf (stderr, "You did not specify any files to tail\n"
751	"use %s --help for help\n", argv[0]);	1445	"use %s --help for help\n", argv[0]);
752	exit(1);	1446	exit (1);
		1447	}
		1448
		1449	if (opt_update && opt_whole)
753	}	1450	{
		1451	fprintf (stderr, "Specify at most one of -update and -whole\n");
		1452	exit (1);
		1453	}
		1454	else if (opt_partial && opt_whole)
		1455	{
		1456	fprintf (stderr, "Specify at most one of -partial and -whole\n");
		1457	exit (1);
		1458	}
		1459
		1460	/* it doesn't make sense to justify if word wrap isn't on */
		1461	if (opt_justify)
		1462	opt_wordwrap = 1;
		1463
		1464	/* HACK-7: do we want to allow both -shade and -outline? */
		1465	if (opt_shade && opt_outline)
		1466	{
		1467	fprintf (stderr, "Specify at most one of -shade and -outline\n");
		1468	exit (1);
		1469	}
		1470
		1471	if (opt_partial)
		1472	/* if we specifically requested to see partial lines then don't insist on whole lines */
		1473	opt_whole = 0;
		1474	else if (file_count > 1)
		1475	/* otherwise, if we're viewing multiple files, default to showing whole lines */
		1476	opt_whole = 1;
754		1477
755	#if HAS_REGEX	1478	#if HAS_REGEX
756	if (transform) {	1479	if (transform)
757	int i;	1480	{
		1481	int i;
758		1482
759	transformre = xmalloc(sizeof(transformre));	1483	printf ("compiling regexp '%s'\n", transform);
		1484	transformre = xmalloc (sizeof (regex_t));
760	i = regcomp(&transformre, transform, REG_EXTENDED);	1485	i = regcomp (transformre, transform, REG_EXTENDED);
761	if (i != 0) {	1486	if (i != 0)
		1487	{
762	char buf[512];	1488	char buf[512];
763		1489
764	regerror(i, &transformre, buf, sizeof(buf));	1490	regerror (i, transformre, buf, sizeof (buf));
765	fprintf(stderr, "Cannot compile regular expression: %s\n", buf);	1491	fprintf (stderr, "Cannot compile regular expression: %s\n", buf);
766	}	1492	}
		1493	else
		1494	printf ("compiled '%s' OK to %x\n", transform, (int)transformre);
767	}	1495	}
768	#endif	1496	#endif
769		1497
		1498	if (opt_outline && !opt_minspace)
		1499	{
		1500	/* adding outline increases the total width and height by 2
		1501	pixels each, and offsets the text one pixel right and one
		1502	pixel down */
		1503	effect_x_space = effect_y_space = 2;
		1504	effect_x_offset = effect_y_offset = 1;
		1505	}
		1506	else if (opt_shade && !opt_minspace)
		1507	{
		1508	/* adding a shadow increases the space used */
		1509	effect_x_space = abs (SHADE_X);
		1510	effect_y_space = abs (SHADE_Y);
		1511
		1512	/* if the shadow is to the right and below then we don't need
		1513	* to move the text to make space for it, but shadows to the left
		1514	* and above need accomodating */
		1515	effect_x_offset = SHADE_X > 0 ? 0 : -SHADE_X;
		1516	effect_y_offset = SHADE_Y > 0 ? 0 : -SHADE_Y;
		1517	}
		1518	else
		1519	{
		1520	effect_x_space = effect_y_space = 0;
		1521	effect_x_offset = effect_y_offset = 0;
		1522	}
		1523
770	InitWindow();	1524	InitWindow ();
771		1525
772	install_signal(SIGINT, blank_window);	1526	install_signal (SIGINT, blank_window);
773	install_signal(SIGQUIT, blank_window);	1527	install_signal (SIGQUIT, blank_window);
774	install_signal(SIGTERM, blank_window);	1528	install_signal (SIGTERM, blank_window);
775	install_signal(SIGHUP, force_reopen);	1529	install_signal (SIGHUP, force_reopen);
776	install_signal(SIGUSR1, list_files);	1530	install_signal (SIGUSR1, list_files);
777	install_signal(SIGUSR2, force_refresh);	1531	install_signal (SIGUSR2, force_refresh);
778		1532
779	if (opt_daemonize)	1533	if (opt_daemonize)
780	daemonize();	1534	daemonize ();
781		1535
782	main_loop();	1536	main_loop ();
783		1537
784	exit(1); /* to make gcc -Wall stop complaining */	1538	exit (1); /* to make gcc -Wall stop complaining */
785	}	1539	}
786		1540
		1541	void
787	void install_signal(int sig, void (*handler)(int))	1542	install_signal (int sig, void (*handler) (int))
788	{	1543	{
789	struct sigaction action;	1544	struct sigaction action;
790		1545
791	action.sa_handler = handler;	1546	action.sa_handler = handler;
792	sigemptyset(&action.sa_mask);	1547	sigemptyset (&action.sa_mask);
793	action.sa_flags = SA_RESTART;	1548	action.sa_flags = SA_RESTART;
		1549
794	if (sigaction(sig, &action, NULL) < 0)	1550	if (sigaction (sig, &action, NULL) < 0)
795	fprintf(stderr, "sigaction(%d): %s\n", sig, strerror(errno)), exit(1);	1551	fprintf (stderr, "sigaction (%d): %s\n", sig, strerror (errno)), exit (1);
796	}	1552	}
797		1553
		1554	void *
798	void *xstrdup(const char *string)	1555	xstrdup (const char *string)
799	{	1556	{
800	void *p;	1557	void *p;
801		1558
802	while ((p = strdup(string)) == NULL) {	1559	while ((p = strdup (string)) == NULL)
		1560	{
803	fprintf(stderr, "Memory exausted.");	1561	fprintf (stderr, "Memory exhausted in xstrdup ().\n");
804	sleep(10);	1562	sleep (10);
805	}	1563	}
		1564
806	return p;	1565	return p;
807	}	1566	}
808		1567
		1568	void *
809	void *xmalloc(size_t size)	1569	xmalloc (size_t size)
810	{	1570	{
811	void *p;	1571	void *p;
812		1572
813	while ((p = malloc(size)) == NULL) {	1573	while ((p = malloc (size)) == NULL)
		1574	{
814	fprintf(stderr, "Memory exausted.");	1575	fprintf (stderr, "Memory exhausted in xmalloc ().\n");
815	sleep(10);	1576	sleep (10);
816	}	1577	}
		1578
817	return p;	1579	return p;
818	}	1580	}
819		1581
		1582	void *
		1583	xrealloc (void *ptr, size_t size)
		1584	{
		1585	void *p;
		1586
		1587	while ((p = realloc (ptr, size)) == NULL)
		1588	{
		1589	fprintf (stderr, "Memory exhausted in xrealloc ().\n");
		1590	sleep (10);
		1591	}
		1592
		1593	return p;
		1594	}
		1595
		1596	void
820	void display_help(char *myname)	1597	display_help (char *myname)
821	{	1598	{
822	printf("Usage: %s [options] file1[,color[,desc]] "	1599	printf ("Usage: %s [options] file1[,color[,desc]]"
823	"[file2[,color[,desc]] ...]\n", myname);	1600	"[options] [file2[,color[,desc]] ...]\n", myname);
824	printf(" -g | -geometry geometry -g WIDTHxHEIGHT+X+Y\n"	1601	printf (" -g | -geometry geometry -g WIDTHxHEIGHT+X+Y\n"
825	" -color color use color $color as default\n"	1602	" -color color use color $color as default\n"
826	" -reload sec command reload after $sec and run command\n"	1603	" -reload sec command reload after $sec and run command\n"
827	" by default -- 3 mins\n"
828	" -id id window id to use instead of the root window\n"	1604	" -id id window id to use instead of the root window\n"
829	" -font FONTSPEC (-fn) font to use\n"	1605	" -font FONTSPEC (-fn) font to use\n"
830	" -f | -fork fork into background\n"	1606	" -f | -fork fork into background\n"
831	" -reverse print new lines at the top\n"	1607	" -reverse print new lines at the top\n"
		1608	" -whole wait for \\n before showing a line\n"
		1609	" -partial show lines even if they don't end with a \\n\n"
		1610	" -update allow updates to old partial lines\n"
		1611	" -cont string to prefix continued partial lines with\n"
		1612	" defaults to \"|| \"\n"
		1613	" -wordwrap wrap long lines at spaces to avoid breaking words\n"
832	" -shade add shading to font\n"	1614	" -shade add shading to font\n"
		1615	" -outline add black outline to font\n"
		1616	" -minspace force minimum line spacing\n"
833	" -noinitial don't display the last file lines on\n"	1617	" -noinitial don't display the last file lines on\n"
834	" startup\n"	1618	" startup\n"
835	" -i | -interval seconds interval between checks (fractional\n"	1619	" -i | -interval seconds interval between checks (fractional\n"
836	" values o.k.). Default 3\n"	1620	" values o.k.). Default 2.4 seconds\n"
837	" -V display version information and exit\n"	1621	" -V display version information and exit\n"
838	"\n");	1622	"\n");
839	printf("Example:\n%s -g 80x25+100+50 -font fixed /var/log/messages,green "	1623	printf ("Example:\n%s -g 800x250+100+50 -font fixed /var/log/messages,green "
840	"/var/log/secure,red,'ALERT'\n", myname);	1624	"/var/log/secure,red,'ALERT'\n", myname);
841	exit(0);	1625	exit (0);
842	}	1626	}
843		1627
		1628	void
844	void display_version(void) {	1629	display_version (void)
		1630	{
845	printf("root-tail version " VERSION "\n");	1631	printf ("root-tail version " VERSION "\n");
846	exit(0);	1632	exit (0);
847	}	1633	}
848		1634
		1635	int
849	int daemonize(void) {	1636	daemonize (void)
		1637	{
		1638	pid_t pid;
		1639
850	switch (fork()) {	1640	switch (pid = fork ())
		1641	{
851	case -1:	1642	case -1:
852	return -1;	1643	return -1;
853	case 0:	1644	case 0:
854	break;	1645	break;
855	default:	1646	default:
856	_exit(0);	1647	/*printf ("%d\n", pid);*/
		1648	exit (0);
857	}	1649	}
858		1650
859	if (setsid() == -1)	1651	if (setsid () == -1)
860	return -1;	1652	return -1;
861		1653
862	return 0;	1654	return 0;
863	}	1655	}

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