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/* |
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* Copyright 2001 by Marco d'Itri <md@linux.it> |
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* Copyright 2000,2001,2002,2003,2004 |
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* Marc Lehmann <pcg@goof.com>, |
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* Chris Moore <chris.moore@mail.com>, |
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* and many others, see README |
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* |
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* Original version by Mike Baker. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
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*/ |
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|
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#include "config.h" |
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#include <assert.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <unistd.h> |
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#include <string.h> |
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#include <signal.h> |
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#include <time.h> |
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#include <fcntl.h> |
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#include <errno.h> |
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#include <sys/time.h> |
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#include <sys/stat.h> |
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#include <sys/types.h> |
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#include <locale.h> |
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#include <ctype.h> |
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#include <stdarg.h> |
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#include <X11/Xlib.h> |
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#include <X11/Xatom.h> |
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#include <X11/Xutil.h> |
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|
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#if HAS_REGEX |
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#include <regex.h> |
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#endif |
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|
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#define SHADE_X 2 |
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#define SHADE_Y 2 |
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|
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/* some italic fonts still go over the margin - this margin of error cleans up the mess */ |
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#define MARGIN_OF_ERROR 2 |
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|
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/* data structures */ |
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struct logfile_entry |
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{ |
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struct logfile_entry *next; |
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|
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char *fname; /* name of file */ |
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char *desc; /* alternative description */ |
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char *buf; /* text read but not yet displayed */ |
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const char *fontname; |
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XFontSet fontset; |
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int font_height; |
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int font_ascent; |
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FILE *fp; /* FILE struct associated with file */ |
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ino_t inode; /* inode of the file opened */ |
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off_t last_size; /* file size at the last check */ |
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unsigned long color; /* color to be used for printing */ |
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const char *colorname; /* color name/string */ |
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int partial; /* true if the last line isn't complete */ |
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int lastpartial; /* true if the previous output wasn't complete */ |
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struct line_node *last; /* last line we output */ |
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int modified; /* true if line is modified & needs displaying */ |
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}; |
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|
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struct line_node |
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{ |
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struct line_node *next; |
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struct line_node *prev; |
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struct logfile_entry *logfile; |
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|
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char *line; /* the text of the line (so far) */ |
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int len; /* the length of the line (in bytes) so far */ |
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int wrapped_left; /* true if wrapped from the previous line */ |
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int wrapped_right; /* true if wrapped to the next line */ |
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struct breakinfo *breaks; /* array of indicies to spaces if wrapped_right */ |
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int num_words; /* the number of words in the line */ |
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int free_pixels; /* the number of free pixels to spread out */ |
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}; |
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|
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struct breakinfo |
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{ |
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int index; /* index into string of start of substring */ |
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int width; /* width in pixels of start of substring */ |
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int len; /* length of substring */ |
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}; |
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|
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struct displaymatrix |
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{ |
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char *line; |
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int len; |
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int offset; |
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int buffer_size; |
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unsigned long color; |
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}; |
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|
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/* global variables */ |
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struct line_node *linelist = NULL, *linelist_tail = NULL; |
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struct displaymatrix *display; |
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int continuation_width = -1; |
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int continuation_color; |
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int continuation_length; |
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|
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/* HACK - ideally listlen will start at however many '~'s will fit on |
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* the screen */ |
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int width = STD_WIDTH, height = STD_HEIGHT, listlen = 50; |
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int win_x = LOC_X, win_y = LOC_Y; |
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int effect_x_space, effect_y_space; /* how much space does shading / outlining take up */ |
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int effect_x_offset, effect_y_offset; /* and how does it offset the usable space */ |
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int do_reopen; |
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struct timeval interval = { 2, 400000 }; |
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|
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/* command line options */ |
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int opt_noinitial, opt_shade, opt_frame, opt_reverse, opt_nofilename, |
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opt_outline, opt_noflicker, opt_whole, opt_update, opt_wordwrap, |
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opt_justify, geom_mask, opt_minspace, reload; |
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const char *command = NULL, |
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*fontname = USE_FONT, *dispname = NULL, *def_color = DEF_COLOR, |
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*continuation = "|| ", *cont_color = DEF_CONT_COLOR; |
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|
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struct logfile_entry *loglist = NULL, *loglist_tail = NULL; |
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|
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Display *disp; |
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Window root; |
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GC WinGC; |
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|
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#if HAS_REGEX |
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struct re_list |
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{ |
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regex_t from; |
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const char *to; |
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struct re_list *next; |
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}; |
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struct re_list *re_head, *re_tail; |
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char *transform_to = NULL; |
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regex_t *transformre; |
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#endif |
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|
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|
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/* prototypes */ |
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void list_files (int); |
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void force_reopen (int); |
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void force_refresh (int); |
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void blank_window (int); |
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#ifdef USE_TOON_GET_ROOT_WINDOW |
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Window ToonGetRootWindow(Display *, int, Window *); |
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#endif /* USE_TOON_GET_ROOT_WINDOW */ |
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|
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void InitWindow (void); |
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unsigned long GetColor (const char *); |
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void redraw (int); |
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void refresh (int, int, int, int); |
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|
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void transform_line (char *s); |
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int lineinput (struct logfile_entry *); |
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void reopen (void); |
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void check_open_files (void); |
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FILE *openlog (struct logfile_entry *); |
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static void main_loop (void); |
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|
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void display_version (void); |
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void display_help (char *); |
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void install_signal (int, void (*)(int)); |
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void *xstrdup (const char *); |
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void *xmalloc (size_t); |
178 |
void *xrealloc (void *, size_t); |
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int daemonize (void); |
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|
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/* signal handlers */ |
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void |
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list_files (int dummy) |
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{ |
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struct logfile_entry *e; |
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|
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fprintf (stderr, "Files opened:\n"); |
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for (e = loglist; e; e = e->next) |
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fprintf (stderr, "\t%s (%s)\n", e->fname, e->desc); |
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} |
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|
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void |
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force_reopen (int dummy) |
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{ |
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do_reopen = 1; |
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} |
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|
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void |
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force_refresh (int dummy) |
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{ |
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redraw (1); |
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} |
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|
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void |
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blank_window (int dummy) |
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{ |
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XClearArea (disp, root, win_x, win_y, width + MARGIN_OF_ERROR, height, False); |
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XFlush (disp); |
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exit (0); |
210 |
} |
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|
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/* X related functions */ |
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unsigned long |
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GetColor (const char *ColorName) |
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{ |
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XColor Color; |
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XWindowAttributes Attributes; |
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|
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XGetWindowAttributes (disp, root, &Attributes); |
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Color.pixel = 0; |
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|
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if (!XParseColor (disp, Attributes.colormap, ColorName, &Color)) |
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fprintf (stderr, "can't parse %s\n", ColorName); |
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else if (!XAllocColor (disp, Attributes.colormap, &Color)) |
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fprintf (stderr, "can't allocate %s\n", ColorName); |
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|
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return Color.pixel; |
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} |
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|
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#ifndef USE_TOON_GET_ROOT_WINDOW |
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static void |
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find_root_window (Display *display, int screen_number) |
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{ |
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if (!root) |
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{ |
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Atom SWM_VROOT = XInternAtom (display, "__SWM_VROOT", False); |
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Atom NAUTILUS_DESKTOP_WINDOW_ID = XInternAtom (display, "NAUTILUS_DESKTOP_WINDOW_ID", False); |
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root = RootWindow (display, screen_number); |
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|
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Window unused, *windows = 0; |
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unsigned int count; |
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|
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Atom type; |
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int format; |
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unsigned long nitems, bytes_after_return; |
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unsigned char *virtual_root_window; |
247 |
|
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if (XGetWindowProperty (display, root, NAUTILUS_DESKTOP_WINDOW_ID, |
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0, 1, False, XA_WINDOW, &type, &format, |
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&nitems, &bytes_after_return, |
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&virtual_root_window) == Success |
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&& type == XA_WINDOW) |
253 |
{ |
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if (XQueryTree (display, *(Window *)virtual_root_window, &unused, &unused, &windows, &count)) |
255 |
root = windows[count - 1]; |
256 |
|
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XFree (virtual_root_window); |
258 |
} |
259 |
else if (XQueryTree (display, root, &unused, &unused, &windows, &count)) |
260 |
{ |
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int i; |
262 |
|
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for (i = 0; i < count; i++) |
264 |
{ |
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if (XGetWindowProperty (display, windows[i], SWM_VROOT, |
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0, 1, False, XA_WINDOW, &type, &format, |
267 |
&nitems, &bytes_after_return, |
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&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; |
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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", |
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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 |
{ |
363 |
struct logfile_entry *e; |
364 |
|
365 |
for (e = loglist; e; e = e->next) |
366 |
e->color = GetColor (e->colorname); |
367 |
} |
368 |
|
369 |
XSelectInput (disp, root, ExposureMask | FocusChangeMask); |
370 |
} |
371 |
|
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) |
382 |
{ |
383 |
XSetClipMask (disp, WinGC, None); |
384 |
refresh (0, 32768, 1, redraw_all); |
385 |
} |
386 |
|
387 |
void draw_text (Display *disp, Window root, GC WinGC, int x, int y, struct line_node *line, int foreground) |
388 |
{ |
389 |
if (line->wrapped_right && opt_justify && line->breaks) |
390 |
{ |
391 |
int i; |
392 |
for (i = 0; i < line->num_words; i++) |
393 |
XmbDrawString (disp, root, line->logfile->fontset, WinGC, |
394 |
x + line->breaks[i].width + ((i * line->free_pixels) / (line->num_words - 1)) |
395 |
+ continuation_width * line->wrapped_left, y, |
396 |
line->line + line->breaks[i].index, |
397 |
line->breaks[i].len); |
398 |
|
399 |
if (line->wrapped_left) |
400 |
{ |
401 |
if (foreground) XSetForeground (disp, WinGC, continuation_color); |
402 |
XmbDrawString (disp, root, line->logfile->fontset, WinGC, x, y, continuation, continuation_length); |
403 |
} |
404 |
} |
405 |
else |
406 |
{ |
407 |
XmbDrawString (disp, root, line->logfile->fontset, WinGC, x + continuation_width * line->wrapped_left, |
408 |
y, line->line, line->len); |
409 |
|
410 |
if (line->wrapped_left) |
411 |
{ |
412 |
if (foreground) XSetForeground (disp, WinGC, continuation_color); |
413 |
XmbDrawString (disp, root, line->logfile->fontset, WinGC, x, y, continuation, continuation_length); |
414 |
} |
415 |
} |
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 |
601 |
int i; |
602 |
if (1) |
603 |
{ |
604 |
for (i = 16; s[i]; i++) |
605 |
s[i] = s[i + 11]; |
606 |
} |
607 |
s[i + 1] = '\0'; |
608 |
#endif |
609 |
|
610 |
if (transformre) |
611 |
{ |
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 |
} |
642 |
else |
643 |
printf ("regexp was not matched by '%s'\n", s); |
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); |
663 |
else |
664 |
r = xmalloc (l2 + 1); |
665 |
|
666 |
memcpy (r + l1, p2, l2); |
667 |
r[l1 + l2] = 0; |
668 |
|
669 |
return r; |
670 |
} |
671 |
|
672 |
/* |
673 |
* This routine can read a line of any length if it is called enough times. |
674 |
*/ |
675 |
int |
676 |
lineinput (struct logfile_entry *logfile) |
677 |
{ |
678 |
char buff[1024], *p; |
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; |
682 |
|
683 |
/* this loop ensures that the whole line is read, even if it's |
684 |
* longer than the buffer. we need to do this because when --whole |
685 |
* is in effect we don't know whether to display the line or not |
686 |
* until we've seen how (ie. whether) it ends */ |
687 |
do |
688 |
{ |
689 |
p = buff; |
690 |
do |
691 |
{ |
692 |
ch = fgetc (logfile->fp); |
693 |
|
694 |
if (ch == '\n' || ch == EOF) |
695 |
break; |
696 |
else if (ch == '\r') |
697 |
continue; /* skip */ |
698 |
else if (ch == '\t') |
699 |
{ |
700 |
do |
701 |
{ |
702 |
*p++ = ' '; |
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); |
735 |
#endif |
736 |
return 1; |
737 |
} |
738 |
|
739 |
/* input: reads file->fname |
740 |
* output: fills file->fp, file->inode |
741 |
* returns file->fp |
742 |
* in case of error, file->fp is NULL |
743 |
*/ |
744 |
FILE * |
745 |
openlog (struct logfile_entry * file) |
746 |
{ |
747 |
struct stat stats; |
748 |
|
749 |
if ((file->fp = fopen (file->fname, "r")) == NULL) |
750 |
{ |
751 |
file->fp = NULL; |
752 |
return NULL; |
753 |
} |
754 |
|
755 |
fstat (fileno (file->fp), &stats); |
756 |
if (S_ISFIFO (stats.st_mode)) |
757 |
{ |
758 |
if (fcntl (fileno (file->fp), F_SETFL, O_NONBLOCK) < 0) |
759 |
perror ("fcntl"), exit (1); |
760 |
file->inode = 0; |
761 |
} |
762 |
else |
763 |
file->inode = stats.st_ino; |
764 |
|
765 |
if (opt_noinitial) |
766 |
fseek (file->fp, 0, SEEK_END); |
767 |
else /* if (stats.st_size > (listlen + 1) * width) |
768 |
* HACK - 'width' is in pixels - how are we to know how much text will fit? |
769 |
* fseek (file->fp, -((listlen + 2) * width/10), SEEK_END); */ |
770 |
fseek (file->fp, -5000, SEEK_END); |
771 |
|
772 |
file->last_size = stats.st_size; |
773 |
return file->fp; |
774 |
} |
775 |
|
776 |
void |
777 |
reopen (void) |
778 |
{ |
779 |
struct logfile_entry *e; |
780 |
|
781 |
for (e = loglist; e; e = e->next) |
782 |
{ |
783 |
if (!e->inode) |
784 |
continue; /* skip stdin */ |
785 |
|
786 |
if (e->fp) |
787 |
fclose (e->fp); |
788 |
/* if fp is NULL we will try again later */ |
789 |
openlog (e); |
790 |
} |
791 |
|
792 |
do_reopen = 0; |
793 |
} |
794 |
|
795 |
void |
796 |
check_open_files (void) |
797 |
{ |
798 |
struct logfile_entry *e; |
799 |
struct stat stats; |
800 |
|
801 |
for (e = loglist; e; e = e->next) |
802 |
{ |
803 |
if (!e->inode) |
804 |
continue; /* skip stdin */ |
805 |
|
806 |
if (stat (e->fname, &stats) < 0) |
807 |
{ /* file missing? */ |
808 |
sleep (1); |
809 |
if (e->fp) |
810 |
fclose (e->fp); |
811 |
if (openlog (e) == NULL) |
812 |
continue; |
813 |
if (fstat (fileno (e->fp), &stats) < 0) |
814 |
continue; |
815 |
} |
816 |
|
817 |
if (stats.st_ino != e->inode) |
818 |
{ /* file renamed? */ |
819 |
if (e->fp) |
820 |
fclose (e->fp); |
821 |
if (openlog (e) == NULL) |
822 |
continue; |
823 |
if (fstat (fileno (e->fp), &stats) < 0) |
824 |
continue; |
825 |
} |
826 |
|
827 |
if (stats.st_size < e->last_size) |
828 |
{ /* file truncated? */ |
829 |
fseek (e->fp, 0, SEEK_SET); |
830 |
e->last_size = stats.st_size; |
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) |
854 |
{ |
855 |
new->next = linelist; |
856 |
new->next->prev = new; |
857 |
|
858 |
new->prev = NULL; |
859 |
linelist = new; |
860 |
} |
861 |
else |
862 |
{ |
863 |
/* 2 pointers from the new node */ |
864 |
new->next = log->last; |
865 |
new->prev = log->last->prev; |
866 |
|
867 |
/* 2 pointers back to the new node */ |
868 |
if (new->next) new->next->prev = new; |
869 |
if (new->prev) new->prev->next = new; |
870 |
|
871 |
/* if this is a new first entry in the list then update |
872 |
* 'linelist' */ |
873 |
if (log->last == linelist) |
874 |
linelist = new; |
875 |
} |
876 |
|
877 |
/* update the logfile record */ |
878 |
if (log) |
879 |
log->last = new; |
880 |
|
881 |
return new; |
882 |
} |
883 |
|
884 |
/* |
885 |
* this is called after either adding a new line or appending to an |
886 |
* old one. in both cases it's possible that the line no longer fits, |
887 |
* and needs wrapping. this function checks the last line associated |
888 |
* with the supplied logfile. |
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 |
1087 |
main_loop (void) |
1088 |
{ |
1089 |
int lin; |
1090 |
time_t lastreload; |
1091 |
Region region = XCreateRegion (); |
1092 |
XEvent xev; |
1093 |
struct logfile_entry *lastprinted = NULL; |
1094 |
struct logfile_entry *current; |
1095 |
int need_update = 1; |
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 |
{ |
1128 |
/* read logs */ |
1129 |
for (current = loglist; current; current = current->next) |
1130 |
{ |
1131 |
if (!current->fp) |
1132 |
continue; /* skip missing files */ |
1133 |
|
1134 |
clearerr (current->fp); |
1135 |
|
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 |
|
1159 |
/* print filename if any, and if last line was from |
1160 |
* different file */ |
1161 |
if (lastprinted != current) |
1162 |
{ |
1163 |
current->last = 0; |
1164 |
if (!opt_nofilename && current->desc[0]) |
1165 |
{ |
1166 |
insert_new_line (xstrdup ("["), current); |
1167 |
append_to_existing_line (xstrdup (current->desc), current); |
1168 |
append_to_existing_line (xstrdup ("]"), current); |
1169 |
} |
1170 |
} |
1171 |
|
1172 |
/* if we're dealing with partial lines, and the last |
1173 |
* time we showed the line it wasn't finished ... */ |
1174 |
if (!opt_whole && current->lastpartial) |
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); |
1192 |
|
1193 |
current->buf = 0; |
1194 |
lastprinted = current; |
1195 |
} |
1196 |
} |
1197 |
|
1198 |
if (need_update) |
1199 |
{ |
1200 |
redraw (0); |
1201 |
need_update = 0; |
1202 |
} |
1203 |
else |
1204 |
{ |
1205 |
XFlush (disp); |
1206 |
|
1207 |
if (!XPending (disp)) |
1208 |
{ |
1209 |
fd_set fdr; |
1210 |
struct timeval to = interval; |
1211 |
|
1212 |
FD_ZERO (&fdr); |
1213 |
FD_SET (ConnectionNumber (disp), &fdr); |
1214 |
select (ConnectionNumber (disp) + 1, &fdr, 0, 0, &to); |
1215 |
} |
1216 |
} |
1217 |
|
1218 |
check_open_files (); |
1219 |
|
1220 |
if (do_reopen) |
1221 |
reopen (); |
1222 |
|
1223 |
/* we ignore possible errors due to window resizing &c */ |
1224 |
while (XPending (disp)) |
1225 |
{ |
1226 |
XNextEvent (disp, &xev); |
1227 |
|
1228 |
switch (xev.type) |
1229 |
{ |
1230 |
case Expose: |
1231 |
{ |
1232 |
XRectangle r; |
1233 |
|
1234 |
r.x = xev.xexpose.x; |
1235 |
r.y = xev.xexpose.y; |
1236 |
r.width = xev.xexpose.width; |
1237 |
r.height = xev.xexpose.height; |
1238 |
|
1239 |
XUnionRectWithRegion (&r, region, region); |
1240 |
} |
1241 |
break; |
1242 |
default: |
1243 |
#ifdef DEBUGMODE |
1244 |
fprintf (stderr, "PANIC! Unknown event %d\n", xev.type); |
1245 |
#endif |
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 |
} |
1272 |
} |
1273 |
} |
1274 |
|
1275 |
|
1276 |
int |
1277 |
main (int argc, char *argv[]) |
1278 |
{ |
1279 |
int i; |
1280 |
int opt_daemonize = 0; |
1281 |
int opt_partial = 0, file_count = 0; |
1282 |
#if HAS_REGEX |
1283 |
char *transform = NULL; |
1284 |
#endif |
1285 |
|
1286 |
setlocale (LC_CTYPE, ""); /* try to initialize the locale. */ |
1287 |
|
1288 |
for (i = 1; i < argc; i++) |
1289 |
{ |
1290 |
const char *arg = argv[i]; |
1291 |
|
1292 |
if (arg[0] == '-' && arg[1] != '\0' && arg[1] != ',') |
1293 |
{ |
1294 |
if (arg[1] == '-') |
1295 |
arg++; |
1296 |
|
1297 |
if (!strcmp (arg, "-?") || |
1298 |
!strcmp (arg, "-help") || !strcmp (arg, "-h")) |
1299 |
display_help (argv[0]); |
1300 |
else if (!strcmp (arg, "-V")) |
1301 |
display_version (); |
1302 |
else if (!strcmp (arg, "-g") || !strcmp (arg, "-geometry")) |
1303 |
geom_mask = |
1304 |
XParseGeometry (argv[++i], &win_x, &win_y, &width, &height); |
1305 |
else if (!strcmp (arg, "-display")) |
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]; |
1311 |
else if (!strcmp (arg, "-font") || !strcmp (arg, "-fn")) |
1312 |
fontname = argv[++i]; |
1313 |
#if HAS_REGEX |
1314 |
else if (!strcmp (arg, "-t")) |
1315 |
{ |
1316 |
transform = argv[++i]; |
1317 |
transform_to = argv[++i]; |
1318 |
printf ("transform: '%s' to '%s'\n", transform, transform_to); |
1319 |
} |
1320 |
#endif |
1321 |
else if (!strcmp (arg, "-fork") || !strcmp (arg, "-f")) |
1322 |
opt_daemonize = 1; |
1323 |
else if (!strcmp (arg, "-reload")) |
1324 |
{ |
1325 |
reload = atoi (argv[++i]); |
1326 |
command = argv[++i]; |
1327 |
} |
1328 |
else if (!strcmp (arg, "-shade")) |
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; |
1336 |
else if (!strcmp (arg, "-frame")) |
1337 |
opt_frame = 1; |
1338 |
else if (!strcmp (arg, "-no-filename")) |
1339 |
opt_nofilename = 1; |
1340 |
else if (!strcmp (arg, "-reverse")) |
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; |
1352 |
else if (!strcmp (arg, "-color")) |
1353 |
def_color = argv[++i]; |
1354 |
else if (!strcmp (arg, "-noinitial")) |
1355 |
opt_noinitial = 1; |
1356 |
else if (!strcmp (arg, "-id")) |
1357 |
{ |
1358 |
unsigned long id; |
1359 |
|
1360 |
if (sscanf (argv[++i], "%li", &id) == 1 && id) |
1361 |
root = id; |
1362 |
} |
1363 |
else if (!strcmp (arg, "-interval") || !strcmp (arg, "-i")) |
1364 |
{ |
1365 |
double iv = atof (argv[++i]); |
1366 |
|
1367 |
interval.tv_sec = (int) iv; |
1368 |
interval.tv_usec = (iv - interval.tv_sec) * 1e6; |
1369 |
} |
1370 |
else |
1371 |
{ |
1372 |
fprintf (stderr, "Unknown option '%s'.\n" |
1373 |
"Try --help for more information.\n", arg); |
1374 |
exit (1); |
1375 |
} |
1376 |
} |
1377 |
else |
1378 |
{ /* it must be a filename */ |
1379 |
struct logfile_entry *e; |
1380 |
const char *fname, *desc, *fcolor = def_color; |
1381 |
char *p; |
1382 |
|
1383 |
file_count++; |
1384 |
|
1385 |
/* this is not foolproof yet (',' in filenames are not allowed) */ |
1386 |
fname = desc = arg; |
1387 |
if ((p = strchr (arg, ','))) |
1388 |
{ |
1389 |
*p = '\0'; |
1390 |
fcolor = p + 1; |
1391 |
|
1392 |
if ((p = strchr (fcolor, ','))) |
1393 |
{ |
1394 |
*p = '\0'; |
1395 |
desc = p + 1; |
1396 |
} |
1397 |
} |
1398 |
|
1399 |
e = xmalloc (sizeof (struct logfile_entry)); |
1400 |
e->partial = 0; |
1401 |
e->buf = 0; |
1402 |
|
1403 |
if (arg[0] == '-' && arg[1] == '\0') |
1404 |
{ |
1405 |
if ((e->fp = fdopen (0, "r")) == NULL) |
1406 |
perror ("fdopen"), exit (1); |
1407 |
if (fcntl (0, F_SETFL, O_NONBLOCK) < 0) |
1408 |
perror ("fcntl"), exit (1); |
1409 |
|
1410 |
e->fname = NULL; |
1411 |
e->inode = 0; |
1412 |
if (desc == arg) |
1413 |
e->desc = xstrdup ("stdin"); |
1414 |
else |
1415 |
e->desc = xstrdup (desc); |
1416 |
} |
1417 |
else |
1418 |
{ |
1419 |
e->fname = xstrdup (fname); |
1420 |
|
1421 |
if (openlog (e) == NULL) |
1422 |
perror (fname), exit (1); |
1423 |
|
1424 |
e->desc = xstrdup (desc); |
1425 |
} |
1426 |
|
1427 |
e->colorname = fcolor; |
1428 |
e->partial = 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 |
} |
1440 |
} |
1441 |
|
1442 |
if (!loglist) |
1443 |
{ |
1444 |
fprintf (stderr, "You did not specify any files to tail\n" |
1445 |
"use %s --help for help\n", argv[0]); |
1446 |
exit (1); |
1447 |
} |
1448 |
|
1449 |
if (opt_update && opt_whole) |
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; |
1477 |
|
1478 |
#if HAS_REGEX |
1479 |
if (transform) |
1480 |
{ |
1481 |
int i; |
1482 |
|
1483 |
printf ("compiling regexp '%s'\n", transform); |
1484 |
transformre = xmalloc (sizeof (regex_t)); |
1485 |
i = regcomp (transformre, transform, REG_EXTENDED); |
1486 |
if (i != 0) |
1487 |
{ |
1488 |
char buf[512]; |
1489 |
|
1490 |
regerror (i, transformre, buf, sizeof (buf)); |
1491 |
fprintf (stderr, "Cannot compile regular expression: %s\n", buf); |
1492 |
} |
1493 |
else |
1494 |
printf ("compiled '%s' OK to %x\n", transform, (int)transformre); |
1495 |
} |
1496 |
#endif |
1497 |
|
1498 |
if (opt_outline && !opt_minspace) |
1499 |
{ |
1500 |
/* adding outline increases the total width and height by 2 |
1501 |
pixels each, and offsets the text one pixel right and one |
1502 |
pixel down */ |
1503 |
effect_x_space = effect_y_space = 2; |
1504 |
effect_x_offset = effect_y_offset = 1; |
1505 |
} |
1506 |
else if (opt_shade && !opt_minspace) |
1507 |
{ |
1508 |
/* adding a shadow increases the space used */ |
1509 |
effect_x_space = abs (SHADE_X); |
1510 |
effect_y_space = abs (SHADE_Y); |
1511 |
|
1512 |
/* if the shadow is to the right and below then we don't need |
1513 |
* to move the text to make space for it, but shadows to the left |
1514 |
* and above need accomodating */ |
1515 |
effect_x_offset = SHADE_X > 0 ? 0 : -SHADE_X; |
1516 |
effect_y_offset = SHADE_Y > 0 ? 0 : -SHADE_Y; |
1517 |
} |
1518 |
else |
1519 |
{ |
1520 |
effect_x_space = effect_y_space = 0; |
1521 |
effect_x_offset = effect_y_offset = 0; |
1522 |
} |
1523 |
|
1524 |
InitWindow (); |
1525 |
|
1526 |
install_signal (SIGINT, blank_window); |
1527 |
install_signal (SIGQUIT, blank_window); |
1528 |
install_signal (SIGTERM, blank_window); |
1529 |
install_signal (SIGHUP, force_reopen); |
1530 |
install_signal (SIGUSR1, list_files); |
1531 |
install_signal (SIGUSR2, force_refresh); |
1532 |
|
1533 |
if (opt_daemonize) |
1534 |
daemonize (); |
1535 |
|
1536 |
main_loop (); |
1537 |
|
1538 |
exit (1); /* to make gcc -Wall stop complaining */ |
1539 |
} |
1540 |
|
1541 |
void |
1542 |
install_signal (int sig, void (*handler) (int)) |
1543 |
{ |
1544 |
struct sigaction action; |
1545 |
|
1546 |
action.sa_handler = handler; |
1547 |
sigemptyset (&action.sa_mask); |
1548 |
action.sa_flags = SA_RESTART; |
1549 |
|
1550 |
if (sigaction (sig, &action, NULL) < 0) |
1551 |
fprintf (stderr, "sigaction (%d): %s\n", sig, strerror (errno)), exit (1); |
1552 |
} |
1553 |
|
1554 |
void * |
1555 |
xstrdup (const char *string) |
1556 |
{ |
1557 |
void *p; |
1558 |
|
1559 |
while ((p = strdup (string)) == NULL) |
1560 |
{ |
1561 |
fprintf (stderr, "Memory exhausted in xstrdup ().\n"); |
1562 |
sleep (10); |
1563 |
} |
1564 |
|
1565 |
return p; |
1566 |
} |
1567 |
|
1568 |
void * |
1569 |
xmalloc (size_t size) |
1570 |
{ |
1571 |
void *p; |
1572 |
|
1573 |
while ((p = malloc (size)) == NULL) |
1574 |
{ |
1575 |
fprintf (stderr, "Memory exhausted in xmalloc ().\n"); |
1576 |
sleep (10); |
1577 |
} |
1578 |
|
1579 |
return p; |
1580 |
} |
1581 |
|
1582 |
void * |
1583 |
xrealloc (void *ptr, size_t size) |
1584 |
{ |
1585 |
void *p; |
1586 |
|
1587 |
while ((p = realloc (ptr, size)) == NULL) |
1588 |
{ |
1589 |
fprintf (stderr, "Memory exhausted in xrealloc ().\n"); |
1590 |
sleep (10); |
1591 |
} |
1592 |
|
1593 |
return p; |
1594 |
} |
1595 |
|
1596 |
void |
1597 |
display_help (char *myname) |
1598 |
{ |
1599 |
printf ("Usage: %s [options] file1[,color[,desc]]" |
1600 |
"[options] [file2[,color[,desc]] ...]\n", myname); |
1601 |
printf (" -g | -geometry geometry -g WIDTHxHEIGHT+X+Y\n" |
1602 |
" -color color use color $color as default\n" |
1603 |
" -reload sec command reload after $sec and run command\n" |
1604 |
" -id id window id to use instead of the root window\n" |
1605 |
" -font FONTSPEC (-fn) font to use\n" |
1606 |
" -f | -fork fork into background\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" |
1614 |
" -shade add shading to font\n" |
1615 |
" -outline add black outline to font\n" |
1616 |
" -minspace force minimum line spacing\n" |
1617 |
" -noinitial don't display the last file lines on\n" |
1618 |
" startup\n" |
1619 |
" -i | -interval seconds interval between checks (fractional\n" |
1620 |
" values o.k.). Default 2.4 seconds\n" |
1621 |
" -V display version information and exit\n" |
1622 |
"\n"); |
1623 |
printf ("Example:\n%s -g 800x250+100+50 -font fixed /var/log/messages,green " |
1624 |
"/var/log/secure,red,'ALERT'\n", myname); |
1625 |
exit (0); |
1626 |
} |
1627 |
|
1628 |
void |
1629 |
display_version (void) |
1630 |
{ |
1631 |
printf ("root-tail version " VERSION "\n"); |
1632 |
exit (0); |
1633 |
} |
1634 |
|
1635 |
int |
1636 |
daemonize (void) |
1637 |
{ |
1638 |
pid_t pid; |
1639 |
|
1640 |
switch (pid = fork ()) |
1641 |
{ |
1642 |
case -1: |
1643 |
return -1; |
1644 |
case 0: |
1645 |
break; |
1646 |
default: |
1647 |
/*printf ("%d\n", pid);*/ |
1648 |
exit (0); |
1649 |
} |
1650 |
|
1651 |
if (setsid () == -1) |
1652 |
return -1; |
1653 |
|
1654 |
return 0; |
1655 |
} |