]> git.refcnt.org Git - colorize.git/blob - colorize.c
projects / colorize.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
history | raw | HEAD
main(): amend wording of diagnostic
[colorize.git] / colorize.c
1 /*
2 * colorize - Read text from standard input stream or file and print
3 * it colorized through use of ANSI escape sequences
4 *
5 * Copyright (c) 2011-2019 Steven Schubiger
6 *
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 *
20 */
21
22 #define _DEFAULT_SOURCE
23 #define _BSD_SOURCE
24 #define _XOPEN_SOURCE 700
25 #define _FILE_OFFSET_BITS 64
26 #include <assert.h>
27 #include <ctype.h>
28 #include <errno.h>
29 #include <getopt.h>
30 #include <pwd.h>
31 #include <stdarg.h>
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <string.h>
35 #include <sys/time.h>
36 #include <sys/types.h>
37 #include <sys/stat.h>
38 #include <time.h>
39 #include <unistd.h>
40 #include <wordexp.h>
41
42 #ifndef DEBUG
43 # define DEBUG 0
44 #endif
45
46 #define str(arg) #arg
47 #define to_str(arg) str(arg)
48
49 #define streq(s1, s2) (strcmp (s1, s2) == 0)
50 #define strneq(s1, s2, n) (strncmp (s1, s2, n) == 0)
51
52 #if !DEBUG
53 # define xmalloc(size) malloc_wrap(size)
54 # define xcalloc(nmemb, size) calloc_wrap(nmemb, size)
55 # define xrealloc(ptr, size) realloc_wrap(ptr, size)
56 # define xstrdup(str) strdup_wrap(str, NULL, 0)
57 # define str_concat(str1, str2) str_concat_wrap(str1, str2, NULL, 0)
58 #else
59 # define xmalloc(size) malloc_wrap_debug(size, __FILE__, __LINE__)
60 # define xcalloc(nmemb, size) calloc_wrap_debug(nmemb, size, __FILE__, __LINE__)
61 # define xrealloc(ptr, size) realloc_wrap_debug(ptr, size, __FILE__, __LINE__)
62 # define xstrdup(str) strdup_wrap(str, __FILE__, __LINE__)
63 # define str_concat(str1, str2) str_concat_wrap(str1, str2, __FILE__, __LINE__)
64 #endif
65
66 #define free_null(ptr) free_wrap((void **)&ptr)
67
68 #if defined(BUF_SIZE) && (BUF_SIZE <= 0 || BUF_SIZE > 65536)
69 # undef BUF_SIZE
70 #endif
71 #ifndef BUF_SIZE
72 # define BUF_SIZE 4096
73 #endif
74
75 #define LF 0x01
76 #define CR 0x02
77
78 #define COUNT_OF(obj, type) (sizeof (obj) / sizeof (type))
79
80 #define SKIP_LINE_ENDINGS(flags) ((flags) == (CR|LF) ? 2 : 1)
81
82 #define VALID_FILE_TYPE(mode) (S_ISREG (mode) || S_ISLNK (mode) || S_ISFIFO (mode))
83
84 #define STACK_VAR(ptr) do { \
85 stack (&vars_list, &stacked_vars, stacked_vars, ptr, IS_GENERIC); \
86 } while (false)
87 #define STACK_FILE(ptr) do { \
88 stack (&vars_list, &stacked_vars, stacked_vars, ptr, IS_FILE); \
89 } while (false)
90 #define RELEASE(ptr) do { \
91 release (vars_list, stacked_vars, (void **)&ptr); \
92 } while (false)
93
94 #if !DEBUG
95 # define MEM_ALLOC_FAIL() do { \
96 fprintf (stderr, "%s: memory allocation failure\n", program_name); \
97 exit (EXIT_FAILURE); \
98 } while (false)
99 #else
100 # define MEM_ALLOC_FAIL_DEBUG(file, line) do { \
101 fprintf (stderr, "Memory allocation failure in source file %s, line %u\n", file, line); \
102 exit (EXIT_FAILURE); \
103 } while (false)
104 #endif
105
106 #define ABORT_TRACE() \
107 fprintf (stderr, "Aborting in source file %s, line %u\n", __FILE__, __LINE__); \
108 abort ();
109
110 #define CHECK_COLORS_RANDOM(color1, color2) \
111 streq (color_names[color1]->name, "random") \
112 && (streq (color_names[color2]->name, "none") \
113 || streq (color_names[color2]->name, "default"))
114
115 #define ALLOC_COMPLETE_PART_LINE 8
116
117 #if defined(COLOR_SEP_CHAR_COLON)
118 # define COLOR_SEP_CHAR ':'
119 #elif defined(COLOR_SEP_CHAR_SLASH)
120 # define COLOR_SEP_CHAR '/'
121 #else
122 # define COLOR_SEP_CHAR '/'
123 #endif
124
125 #define CONF_FILE ".colorize.conf"
126
127 #if DEBUG
128 # define DEBUG_FILE "debug.txt"
129 #endif
130
131 #define MAX_ATTRIBUTE_CHARS (6 * 2)
132
133 #define PROGRAM_NAME "colorize"
134
135 #define VERSION "0.65"
136
137 typedef enum { false, true } bool;
138
139 struct conf {
140 char *attr;
141 char *color;
142 char *exclude_random;
143 char *omit_color_empty;
144 };
145
146 enum { DESC_OPTION, DESC_CONF };
147
148 struct color_name {
149 char *name;
150 char *orig;
151 };
152
153 struct color {
154 const char *name;
155 const char *code;
156 };
157
158 static const struct color fg_colors[] = {
159 { "none", NULL },
160 { "black", "30m" },
161 { "red", "31m" },
162 { "green", "32m" },
163 { "yellow", "33m" },
164 { "blue", "34m" },
165 { "magenta", "35m" },
166 { "cyan", "36m" },
167 { "white", "37m" },
168 { "default", "39m" },
169 };
170 static const struct color bg_colors[] = {
171 { "none", NULL },
172 { "black", "40m" },
173 { "red", "41m" },
174 { "green", "42m" },
175 { "yellow", "43m" },
176 { "blue", "44m" },
177 { "magenta", "45m" },
178 { "cyan", "46m" },
179 { "white", "47m" },
180 { "default", "49m" },
181 };
182
183 struct bytes_size {
184 unsigned int size;
185 char unit;
186 };
187
188 enum {
189 FMT_GENERIC,
190 FMT_STRING,
191 FMT_QUOTE,
192 FMT_COLOR,
193 FMT_RANDOM,
194 FMT_ERROR,
195 FMT_FILE,
196 FMT_TYPE,
197 FMT_CONF,
198 FMT_CONF_FILE
199 };
200 static const char *formats[] = {
201 "%s", /* generic */
202 "%s '%s'", /* string */
203 "%s `%s' %s", /* quote */
204 "%s color '%s' %s", /* color */
205 "%s color '%s' %s '%s'", /* random */
206 "less than %lu bytes %s", /* error */
207 "%s: %s", /* file */
208 "%s: %s: %s", /* type */
209 "%s: option '%s' %s", /* conf */
210 "config file %s: %s" /* conf file */
211 };
212
213 enum { GENERIC, FOREGROUND = 0, BACKGROUND };
214
215 static const struct {
216 const struct color *entries;
217 unsigned int count;
218 const char *desc;
219 } tables[] = {
220 { fg_colors, COUNT_OF (fg_colors, struct color), "foreground" },
221 { bg_colors, COUNT_OF (bg_colors, struct color), "background" },
222 };
223
224 static unsigned int opts_set;
225 enum opt_set {
226 OPT_ATTR_SET = 0x01,
227 OPT_EXCLUDE_RANDOM_SET = 0x02,
228 OPT_OMIT_COLOR_EMPTY_SET = 0x04
229 };
230 static struct {
231 char *attr;
232 char *exclude_random;
233 } opts_arg = { NULL, NULL };
234
235 enum {
236 OPT_ATTR = 1,
237 OPT_CLEAN,
238 OPT_CLEAN_ALL,
239 OPT_CONFIG,
240 OPT_EXCLUDE_RANDOM,
241 OPT_OMIT_COLOR_EMPTY,
242 OPT_HELP,
243 OPT_VERSION
244 };
245 static int opt_type;
246 static const struct option long_opts[] = {
247 { "attr", required_argument, &opt_type, OPT_ATTR },
248 { "clean", no_argument, &opt_type, OPT_CLEAN },
249 { "clean-all", no_argument, &opt_type, OPT_CLEAN_ALL },
250 { "config", required_argument, &opt_type, OPT_CONFIG },
251 { "exclude-random", required_argument, &opt_type, OPT_EXCLUDE_RANDOM },
252 { "omit-color-empty", no_argument, &opt_type, OPT_OMIT_COLOR_EMPTY },
253 { "help", no_argument, &opt_type, OPT_HELP },
254 { "version", no_argument, &opt_type, OPT_VERSION },
255 { NULL, 0, NULL, 0 },
256 };
257
258 enum attr_type {
259 ATTR_BOLD = 0x01,
260 ATTR_UNDERSCORE = 0x02,
261 ATTR_BLINK = 0x04,
262 ATTR_REVERSE = 0x08,
263 ATTR_CONCEALED = 0x10
264 };
265 struct attr {
266 const char *name;
267 unsigned int val;
268 enum attr_type type;
269 };
270
271 enum var_type {
272 IS_GENERIC,
273 IS_FILE,
274 IS_UNUSED
275 };
276 struct var_list {
277 void *ptr;
278 enum var_type type;
279 };
280
281 static FILE *stream;
282 #if DEBUG
283 static FILE *log;
284 #endif
285
286 static unsigned int stacked_vars;
287 static struct var_list *vars_list;
288
289 static bool clean;
290 static bool clean_all;
291 static bool omit_color_empty;
292
293 static char attr[MAX_ATTRIBUTE_CHARS + 1];
294 static char *exclude;
295
296 static const char *program_name;
297
298 #if DEBUG
299 static void print_tstamp (FILE *);
300 #endif
301 static void process_opts (int, char **, char **);
302 static void conf_file_path (char **);
303 static void process_opt_attr (const char *, const bool);
304 static void write_attr (const struct attr *, unsigned int *, const bool);
305 static void process_opt_exclude_random (const char *, const bool);
306 static void parse_conf (const char *, struct conf *);
307 static void assign_conf (const char *, struct conf *, const char *, char *);
308 static void init_conf_vars (const struct conf *);
309 static void init_opts_vars (void);
310 static void print_hint (void);
311 static void print_help (void);
312 static void print_version (void);
313 static void cleanup (void);
314 static void free_color_names (struct color_name **);
315 static void free_conf (struct conf *);
316 static void process_args (unsigned int, char **, char *, const struct color **, const char **, FILE **, struct conf *);
317 static void process_file_arg (const char *, const char **, FILE **);
318 static bool skip_path_colors (const char *, const char *, const struct stat *, const bool);
319 static void gather_color_names (const char *, char *, struct color_name **);
320 static void read_print_stream (const char *, const struct color **, const char *, FILE *);
321 static void merge_print_line (const char *, const char *, FILE *);
322 static void complete_part_line (const char *, char **, FILE *);
323 static bool get_next_char (char *, const char **, FILE *, bool *);
324 static void save_char (char, char **, size_t *, size_t *);
325 static void find_color_entries (struct color_name **, const struct color **);
326 static void find_color_entry (const struct color_name *, unsigned int, const struct color **);
327 static void print_line (const char *, const struct color **, const char * const, unsigned int, bool);
328 static void print_clean (const char *);
329 static bool is_esc (const char *);
330 static const char *get_end_of_esc (const char *);
331 static const char *get_end_of_text (const char *);
332 static void print_text (const char *, size_t);
333 static bool gather_esc_offsets (const char *, const char **, const char **);
334 static bool validate_esc_clean_all (const char **);
335 static bool validate_esc_clean (int, unsigned int, unsigned int *, const char **, bool *);
336 static bool is_reset (int, unsigned int, const char **);
337 static bool is_attr (int, unsigned int, unsigned int, const char **);
338 static bool is_fg_color (int, const char **);
339 static bool is_bg_color (int, unsigned int, const char **);
340 #if !DEBUG
341 static void *malloc_wrap (size_t);
342 static void *calloc_wrap (size_t, size_t);
343 static void *realloc_wrap (void *, size_t);
344 #else
345 static void *malloc_wrap_debug (size_t, const char *, unsigned int);
346 static void *calloc_wrap_debug (size_t, size_t, const char *, unsigned int);
347 static void *realloc_wrap_debug (void *, size_t, const char *, unsigned int);
348 #endif
349 static void free_wrap (void **);
350 static char *strdup_wrap (const char *, const char *, unsigned int);
351 static char *str_concat_wrap (const char *, const char *, const char *, unsigned int);
352 static char *expand_string (const char *);
353 static bool get_bytes_size (unsigned long, struct bytes_size *);
354 static char *get_file_type (mode_t);
355 static bool has_color_name (const char *, const char *);
356 static FILE *open_file (const char *, const char *);
357 static void vfprintf_diag (const char *, ...);
358 static void vfprintf_fail (const char *, ...);
359 static void stack (struct var_list **, unsigned int *, unsigned int, void *, enum var_type);
360 static void release (struct var_list *, unsigned int, void **);
361
362 extern int optind;
363
364 int
365 main (int argc, char **argv)
366 {
367 unsigned int arg_cnt;
368
369 const struct color *colors[2] = {
370 NULL, /* foreground */
371 NULL, /* background */
372 };
373
374 const char *file = NULL;
375
376 char *conf_file = NULL;
377 struct conf config = { NULL, NULL, NULL, NULL };
378
379 program_name = argv[0];
380 atexit (cleanup);
381
382 setvbuf (stdout, NULL, _IOLBF, 0);
383
384 #if DEBUG
385 log = open_file (DEBUG_FILE, "w");
386 print_tstamp (log);
387 /* We're in debugging mode, hence we can't invoke STACK_FILE()
388 prior to print_tstamp(), because both cause text to be written
389 to the same logfile which is expected to have the timestamp
390 first. */
391 STACK_FILE (log);
392 #endif
393
394 attr[0] = '\0';
395
396 process_opts (argc, argv, &conf_file);
397
398 #ifdef CONF_FILE_TEST
399 conf_file = to_str (CONF_FILE_TEST);
400 #elif !defined(TEST)
401 if (conf_file == NULL)
402 {
403 conf_file_path (&conf_file);
404 STACK_VAR (conf_file);
405 }
406 else
407 {
408 char *s;
409 if ((s = expand_string (conf_file)))
410 {
411 free (conf_file);
412 conf_file = s;
413 }
414 STACK_VAR (conf_file);
415 errno = 0;
416 if (access (conf_file, F_OK) == -1)
417 vfprintf_fail (formats[FMT_CONF_FILE], conf_file, strerror (errno));
418 }
419 #endif
420 #if defined(CONF_FILE_TEST) || !defined(TEST)
421 if (access (conf_file, F_OK) != -1)
422 parse_conf (conf_file, &config);
423 #endif
424 #if !defined(CONF_FILE_TEST) && !defined(TEST)
425 RELEASE (conf_file);
426 #endif
427 init_conf_vars (&config);
428
429 init_opts_vars ();
430
431 arg_cnt = argc - optind;
432
433 if (clean || clean_all)
434 {
435 if (clean && clean_all)
436 vfprintf_fail (formats[FMT_GENERIC], "--clean and --clean-all switch are mutually exclusive");
437 if (arg_cnt > 1)
438 vfprintf_fail ("--clean%s switch cannot be used with more than one file", clean_all ? "-all" : "");
439 {
440 unsigned int i;
441 const struct option_set {
442 const char *option;
443 enum opt_set set;
444 } options[] = {
445 { "attr", OPT_ATTR_SET },
446 { "exclude-random", OPT_EXCLUDE_RANDOM_SET },
447 { "omit-color-empty", OPT_OMIT_COLOR_EMPTY_SET },
448 };
449 for (i = 0; i < COUNT_OF (options, struct option_set); i++)
450 if (opts_set & options[i].set)
451 vfprintf_diag ("--%s switch has no meaning with --clean%s", options[i].option, clean_all ? "-all" : "");
452 }
453 }
454 else
455 {
456 if (arg_cnt == 0 || arg_cnt > 2)
457 {
458 vfprintf_diag ("%u arguments provided, expected 1-2 arguments or --clean[-all]", arg_cnt);
459 print_hint ();
460 exit (EXIT_FAILURE);
461 }
462 }
463
464 if (clean || clean_all)
465 process_file_arg (argv[optind], &file, &stream);
466 else
467 process_args (arg_cnt, &argv[optind], &attr[0], colors, &file, &stream, &config);
468 read_print_stream (&attr[0], colors, file, stream);
469
470 free_conf (&config);
471
472 RELEASE (exclude);
473
474 exit (EXIT_SUCCESS);
475 }
476
477 #if DEBUG
478 static void
479 print_tstamp (FILE *log)
480 {
481 time_t t;
482 struct tm *tm;
483 char str[128];
484 size_t written;
485
486 t = time (NULL);
487 tm = localtime (&t);
488 if (tm == NULL)
489 {
490 perror ("localtime");
491 exit (EXIT_FAILURE);
492 }
493 written = strftime (str, sizeof (str), "%Y-%m-%d %H:%M:%S %Z", tm);
494 if (written == 0)
495 vfprintf_fail (formats[FMT_GENERIC], "strftime: 0 returned");
496
497 fprintf (log, "%s\n", str);
498 while (written--)
499 fprintf (log, "=");
500 fprintf (log, "\n");
501 }
502 #endif
503
504 #define DUP_CONFIG() \
505 *conf_file = xstrdup (optarg); \
506 break;
507
508 #define PRINT_HELP_EXIT() \
509 print_help (); \
510 exit (EXIT_SUCCESS);
511
512 #define PRINT_VERSION_EXIT() \
513 print_version (); \
514 exit (EXIT_SUCCESS);
515
516 extern char *optarg;
517
518 static void
519 process_opts (int argc, char **argv, char **conf_file)
520 {
521 int opt;
522 while ((opt = getopt_long (argc, argv, "c:hV", long_opts, NULL)) != -1)
523 {
524 switch (opt)
525 {
526 case 0: /* long opts */
527 switch (opt_type)
528 {
529 case OPT_ATTR:
530 opts_set |= OPT_ATTR_SET;
531 opts_arg.attr = xstrdup (optarg);
532 STACK_VAR (opts_arg.attr);
533 break;
534 case OPT_CLEAN:
535 clean = true;
536 break;
537 case OPT_CLEAN_ALL:
538 clean_all = true;
539 break;
540 case OPT_CONFIG:
541 DUP_CONFIG ();
542 case OPT_EXCLUDE_RANDOM:
543 opts_set |= OPT_EXCLUDE_RANDOM_SET;
544 opts_arg.exclude_random = xstrdup (optarg);
545 STACK_VAR (opts_arg.exclude_random);
546 break;
547 case OPT_OMIT_COLOR_EMPTY:
548 opts_set |= OPT_OMIT_COLOR_EMPTY_SET;
549 break;
550 case OPT_HELP:
551 PRINT_HELP_EXIT ();
552 case OPT_VERSION:
553 PRINT_VERSION_EXIT ();
554 default: /* never reached */
555 ABORT_TRACE ();
556 }
557 break;
558 case 'c':
559 DUP_CONFIG ();
560 case 'h':
561 PRINT_HELP_EXIT ();
562 case 'V':
563 PRINT_VERSION_EXIT ();
564 case '?':
565 print_hint ();
566 exit (EXIT_FAILURE);
567 default: /* never reached */
568 ABORT_TRACE ();
569 }
570 }
571 }
572
573 static void
574 conf_file_path (char **conf_file)
575 {
576 char *path;
577 uid_t uid;
578 struct passwd *passwd;
579 size_t size;
580
581 uid = getuid ();
582 errno = 0;
583 if ((passwd = getpwuid (uid)) == NULL)
584 {
585 if (errno == 0)
586 vfprintf_diag ("password file entry for uid %lu not found", (unsigned long)uid);
587 else
588 perror ("getpwuid");
589 exit (EXIT_FAILURE);
590 }
591 size = strlen (passwd->pw_dir) + 1 + strlen (CONF_FILE) + 1;
592 path = xmalloc (size);
593 snprintf (path, size, "%s/%s", passwd->pw_dir, CONF_FILE);
594
595 *conf_file = path;
596 }
597
598 static void
599 process_opt_attr (const char *p, const bool is_opt)
600 {
601 /* If attributes are added to this "list", also increase MAX_ATTRIBUTE_CHARS! */
602 const struct attr attrs[] = {
603 { "bold", 1, ATTR_BOLD },
604 { "underscore", 4, ATTR_UNDERSCORE },
605 { "blink", 5, ATTR_BLINK },
606 { "reverse", 7, ATTR_REVERSE },
607 { "concealed", 8, ATTR_CONCEALED },
608 };
609 unsigned int attr_types = 0;
610 const char *desc_type[2] = { "--attr switch", "attr conf option" };
611 const unsigned int DESC_TYPE = is_opt ? DESC_OPTION : DESC_CONF;
612
613 while (*p)
614 {
615 const char *s;
616 if (!isalnum (*p))
617 vfprintf_fail ("%s must be provided a string", desc_type[DESC_TYPE]);
618 s = p;
619 while (isalnum (*p))
620 p++;
621 if (*p != '\0' && *p != ',')
622 vfprintf_fail ("%s must have strings separated by ,", desc_type[DESC_TYPE]);
623 else
624 {
625 bool valid_attr = false;
626 unsigned int i;
627 for (i = 0; i < COUNT_OF (attrs, struct attr); i++)
628 {
629 const size_t name_len = strlen (attrs[i].name);
630 if ((size_t)(p - s) == name_len && strneq (s, attrs[i].name, name_len))
631 {
632 write_attr (&attrs[i], &attr_types, is_opt);
633 valid_attr = true;
634 break;
635 }
636 }
637 if (!valid_attr)
638 {
639 char *attr_invalid = xmalloc ((p - s) + 1);
640 STACK_VAR (attr_invalid);
641 strncpy (attr_invalid, s, p - s);
642 attr_invalid[p - s] = '\0';
643 vfprintf_fail ("%s attribute '%s' is not valid", desc_type[DESC_TYPE], attr_invalid);
644 RELEASE (attr_invalid); /* never reached */
645 }
646 }
647 if (*p)
648 p++;
649 }
650 }
651
652 static void
653 write_attr (const struct attr *attr_i, unsigned int *attr_types, const bool is_opt)
654 {
655 const unsigned int val = attr_i->val;
656 const enum attr_type attr_type = attr_i->type;
657 const char *attr_name = attr_i->name;
658
659 if (*attr_types & attr_type)
660 vfprintf_fail ("%s has attribute '%s' twice or more",
661 is_opt ? "--attr switch" : "attr conf option", attr_name);
662 snprintf (attr + strlen (attr), 3, "%u;", val);
663 *attr_types |= attr_type;
664 }
665
666 static void
667 process_opt_exclude_random (const char *s, const bool is_opt)
668 {
669 bool valid = false;
670 unsigned int i;
671 RELEASE (exclude);
672 exclude = xstrdup (s);
673 STACK_VAR (exclude);
674 for (i = 1; i < tables[GENERIC].count - 1; i++) /* skip color none and default */
675 {
676 const struct color *entry = &tables[GENERIC].entries[i];
677 if (streq (exclude, entry->name))
678 {
679 valid = true;
680 break;
681 }
682 }
683 if (!valid)
684 vfprintf_fail ("%s must be provided a plain color",
685 is_opt ? "--exclude-random switch" : "exclude-random conf option");
686 }
687
688 static void
689 init_opts_vars (void)
690 {
691 if (opts_set & OPT_ATTR_SET)
692 {
693 attr[0] = '\0'; /* Clear attr string to discard values from the config file. */
694 process_opt_attr (opts_arg.attr, true);
695 }
696 if (opts_set & OPT_EXCLUDE_RANDOM_SET)
697 process_opt_exclude_random (opts_arg.exclude_random, true);
698 if (opts_set & OPT_OMIT_COLOR_EMPTY_SET)
699 omit_color_empty = true;
700
701 RELEASE (opts_arg.attr);
702 RELEASE (opts_arg.exclude_random);
703 }
704
705 #define IS_SPACE(c) ((c) == ' ' || (c) == '\t')
706
707 static void
708 parse_conf (const char *conf_file, struct conf *config)
709 {
710 unsigned int cnt = 0;
711 char line[256 + 1];
712 FILE *conf;
713
714 conf = open_file (conf_file, "r");
715 STACK_FILE (conf);
716
717 while (fgets (line, sizeof (line), conf))
718 {
719 char *cfg, *val;
720 char *assign, *comment, *opt, *value;
721 char *p;
722
723 cnt++;
724 if ((p = strchr (line, '\r')) && *(p + 1) != '\n')
725 vfprintf_fail ("%s: CR ending of line %u is not supported, switch to CRLF/LF instead", conf_file, cnt);
726 if (strlen (line) > (sizeof (line) - 2))
727 vfprintf_fail ("%s: line %u exceeds maximum of %u characters", conf_file, cnt, (unsigned int)(sizeof (line) - 2));
728 if ((p = strpbrk (line, "\n\r")))
729 *p = '\0';
730 /* NAME PARSING (start) */
731 p = line;
732 /* skip leading spaces and tabs for name */
733 while (IS_SPACE (*p))
734 p++;
735 /* skip line if a) string end, b) comment, [cd]) newline */
736 if (*p == '\0' || *p == '#' || *p == '\n' || *p == '\r')
737 continue;
738 opt = p;
739 if (!(assign = strchr (opt, '='))) /* check for = */
740 {
741 char *s;
742 if ((s = strpbrk (opt, "# ")))
743 *s = '\0';
744 vfprintf_fail (formats[FMT_CONF], conf_file, opt, "not followed by =");
745 }
746 p = assign;
747 /* skip trailing spaces and tabs for name */
748 while (IS_SPACE (*(p - 1)))
749 p--;
750 *p = '\0';
751 /* NAME PARSING (end) */
752 /* NAME VALIDATION (start) */
753 for (p = opt; *p; p++)
754 if (!isalnum (*p) && *p != '-')
755 vfprintf_fail (formats[FMT_CONF], conf_file, opt, "cannot be made of non-option characters");
756 /* NAME VALIDATION (end) */
757 /* VALUE PARSING (start) */
758 p = assign + 1;
759 /* skip leading spaces and tabs for value */
760 while (IS_SPACE (*p))
761 p++;
762 /* skip line if comment */
763 if (*p == '#')
764 continue;
765 value = p;
766 if ((comment = strchr (p, '#')))
767 p = comment;
768 else
769 p += strlen (p);
770 /* skip trailing spaces and tabs for value */
771 while (IS_SPACE (*(p - 1)))
772 p--;
773 *p = '\0';
774 /* VALUE PARSING (end) */
775
776 /* save option name */
777 cfg = xstrdup (opt);
778 STACK_VAR (cfg);
779 /* save option value (allow empty ones) */
780 val = strlen (value) ? xstrdup (value) : NULL;
781 STACK_VAR (val);
782
783 assign_conf (conf_file, config, cfg, val);
784 RELEASE (cfg);
785 }
786
787 RELEASE (conf);
788 }
789
790 #define ASSIGN_CONF(str,val) do { \
791 RELEASE (str); \
792 str = val; \
793 } while (false)
794
795 static void
796 assign_conf (const char *conf_file, struct conf *config, const char *cfg, char *val)
797 {
798 if (streq (cfg, "attr"))
799 ASSIGN_CONF (config->attr, val);
800 else if (streq (cfg, "color"))
801 ASSIGN_CONF (config->color, val);
802 else if (streq (cfg, "exclude-random"))
803 ASSIGN_CONF (config->exclude_random, val);
804 else if (streq (cfg, "omit-color-empty"))
805 ASSIGN_CONF (config->omit_color_empty, val);
806 else
807 vfprintf_fail (formats[FMT_CONF], conf_file, cfg, "not recognized");
808 }
809
810 static void
811 init_conf_vars (const struct conf *config)
812 {
813 if (config->attr)
814 process_opt_attr (config->attr, false);
815 if (config->exclude_random)
816 process_opt_exclude_random (config->exclude_random, false);
817 if (config->omit_color_empty)
818 {
819 if (streq (config->omit_color_empty, "yes"))
820 omit_color_empty = true;
821 else if (streq (config->omit_color_empty, "no"))
822 omit_color_empty = false;
823 else
824 vfprintf_fail (formats[FMT_GENERIC], "omit-color-empty conf option is not valid");
825 }
826 }
827
828 static void
829 print_hint (void)
830 {
831 fprintf (stderr, "Type `%s --help' for help screen.\n", program_name);
832 }
833
834 static void
835 print_help (void)
836 {
837 struct opt_data {
838 const char *name;
839 const char *short_opt;
840 const char *arg;
841 };
842 const struct opt_data opts_data[] = {
843 { "attr", NULL, "=ATTR1,ATTR2,..." },
844 { "config", "c", "=PATH" },
845 { "exclude-random", NULL, "=COLOR" },
846 { "help", "h", NULL },
847 { "version", "V", NULL },
848 };
849 const struct option *opt = long_opts;
850 unsigned int i;
851
852 printf ("Usage: %s (foreground) OR (foreground)%c(background) OR --clean[-all] [-|file]\n\n", program_name, COLOR_SEP_CHAR);
853 printf ("\tColors (foreground) (background)\n");
854 for (i = 0; i < tables[FOREGROUND].count; i++)
855 {
856 const struct color *entry = &tables[FOREGROUND].entries[i];
857 const char *name = entry->name;
858 const char *code = entry->code;
859 if (code)
860 printf ("\t\t{\033[%s#\033[0m} [%c%c]%s%*s%s\n",
861 code, toupper (*name), *name, name + 1, 10 - (int)strlen (name), " ", name);
862 else
863 printf ("\t\t{-} %s%*s%s\n", name, 13 - (int)strlen (name), " ", name);
864 }
865 printf ("\t\t{*} [Rr]%s%*s%s [--exclude-random=<foreground color>]\n", "andom", 10 - (int)strlen ("random"), " ", "random");
866
867 printf ("\n\tFirst character of color name in upper case denotes increased intensity,\n");
868 printf ("\twhereas for lower case colors will be of normal intensity.\n");
869
870 printf ("\n\tOptions\n");
871 for (; opt->name; opt++)
872 {
873 const struct opt_data *opt_data = NULL;
874 unsigned int i;
875 for (i = 0; i < COUNT_OF (opts_data, struct opt_data); i++)
876 if (streq (opt->name, opts_data[i].name))
877 {
878 opt_data = &opts_data[i];
879 break;
880 }
881 if (opt_data)
882 {
883 if (opt_data->short_opt)
884 printf ("\t\t-%s, --%s", opt_data->short_opt, opt->name);
885 else
886 printf ("\t\t --%s", opt->name);
887 if (opt_data->arg)
888 printf ("%s", opt_data->arg);
889 printf ("\n");
890 }
891 else
892 printf ("\t\t --%s\n", opt->name);
893 }
894 printf ("\n");
895 }
896
897 static void
898 print_version (void)
899 {
900 #ifdef HAVE_VERSION
901 # include "version.h"
902 #else
903 const char *const version = NULL;
904 #endif
905 const char *version_prefix, *version_string;
906 const char *c_flags, *ld_flags, *cpp_flags;
907 const char *const desc_flags_unknown = "unknown";
908 struct bytes_size bytes_size;
909 bool debug;
910 #ifdef CFLAGS
911 c_flags = to_str (CFLAGS);
912 #else
913 c_flags = desc_flags_unknown;
914 #endif
915 #ifdef LDFLAGS
916 ld_flags = to_str (LDFLAGS);
917 #else
918 ld_flags = desc_flags_unknown;
919 #endif
920 #ifdef CPPFLAGS
921 cpp_flags = to_str (CPPFLAGS);
922 #else
923 cpp_flags = desc_flags_unknown;
924 #endif
925 #if DEBUG
926 debug = true;
927 #else
928 debug = false;
929 #endif
930 version_prefix = version ? "" : "v";
931 version_string = version ? version : VERSION;
932 printf ("%s %s%s (compiled at %s, %s)\n", PROGRAM_NAME, version_prefix, version_string, __DATE__, __TIME__);
933
934 printf ("Compiler flags: %s\n", c_flags);
935 printf ("Linker flags: %s\n", ld_flags);
936 printf ("Preprocessor flags: %s\n", cpp_flags);
937 if (get_bytes_size (BUF_SIZE, &bytes_size))
938 {
939 if (BUF_SIZE % 1024 == 0)
940 printf ("Buffer size: %u%c\n", bytes_size.size, bytes_size.unit);
941 else
942 printf ("Buffer size: %u%c, %u byte%s\n", bytes_size.size, bytes_size.unit,
943 BUF_SIZE % 1024, BUF_SIZE % 1024 > 1 ? "s" : "");
944 }
945 else
946 printf ("Buffer size: %lu byte%s\n", (unsigned long)BUF_SIZE, BUF_SIZE > 1 ? "s" : "");
947 printf ("Color separator: '%c'\n", COLOR_SEP_CHAR);
948 printf ("Debugging: %s\n", debug ? "yes" : "no");
949 }
950
951 static void
952 cleanup (void)
953 {
954 if (stream && fileno (stream) != STDIN_FILENO)
955 RELEASE (stream);
956 #if DEBUG
957 if (log)
958 RELEASE (log);
959 #endif
960
961 if (vars_list)
962 {
963 unsigned int i;
964 for (i = 0; i < stacked_vars; i++)
965 {
966 struct var_list *var = &vars_list[i];
967 switch (var->type)
968 {
969 case IS_GENERIC:
970 free (var->ptr);
971 break;
972 case IS_FILE:
973 fclose (var->ptr);
974 break;
975 case IS_UNUSED:
976 break;
977 default: /* never reached */
978 ABORT_TRACE ();
979 }
980 }
981 free_null (vars_list);
982 }
983 }
984
985 static void
986 free_color_names (struct color_name **color_names)
987 {
988 unsigned int i;
989 for (i = 0; color_names[i]; i++)
990 {
991 RELEASE (color_names[i]->name);
992 RELEASE (color_names[i]->orig);
993 RELEASE (color_names[i]);
994 }
995 }
996
997 static void
998 free_conf (struct conf *config)
999 {
1000 RELEASE (config->attr);
1001 RELEASE (config->color);
1002 RELEASE (config->exclude_random);
1003 RELEASE (config->omit_color_empty);
1004 }
1005
1006 static void
1007 process_args (unsigned int arg_cnt, char **arg_strings, char *attr, const struct color **colors, const char **file, FILE **stream, struct conf *config)
1008 {
1009 bool has_hyphen, use_conf_color;
1010 int ret;
1011 char *p;
1012 struct stat sb;
1013 struct color_name *color_names[3] = {
1014 NULL, /* foreground */
1015 NULL, /* background */
1016 NULL, /* sentinel value */
1017 };
1018
1019 const char *color_string = arg_cnt >= 1 ? arg_strings[0] : NULL;
1020 const char *file_string = arg_cnt == 2 ? arg_strings[1] : NULL;
1021
1022 assert (color_string != NULL);
1023
1024 has_hyphen = streq (color_string, "-");
1025
1026 if (has_hyphen)
1027 {
1028 if (file_string)
1029 vfprintf_fail (formats[FMT_GENERIC], "hyphen cannot be used as color string");
1030 else if (!config->color)
1031 vfprintf_fail (formats[FMT_GENERIC], "hyphen must be preceded by color string");
1032 }
1033
1034 if (!has_hyphen && (ret = lstat (color_string, &sb)) == 0) /* exists */
1035 /* Ensure that we don't fail if there's a file with one or more
1036 color names in its path. */
1037 use_conf_color = skip_path_colors (color_string, file_string, &sb, !!config->color);
1038 else if (has_hyphen)
1039 use_conf_color = true;
1040 else
1041 use_conf_color = false;
1042
1043 /* Use color from config file. */
1044 if (arg_cnt == 1 && use_conf_color)
1045 {
1046 file_string = color_string;
1047 color_string = config->color;
1048 }
1049
1050 if ((p = strchr (color_string, COLOR_SEP_CHAR)))
1051 {
1052 if (p == color_string)
1053 vfprintf_fail (formats[FMT_STRING], "foreground color missing in string", color_string);
1054 else if (p == color_string + strlen (color_string) - 1)
1055 vfprintf_fail (formats[FMT_STRING], "background color missing in string", color_string);
1056 else if (strchr (++p, COLOR_SEP_CHAR))
1057 vfprintf_fail (formats[FMT_STRING], "one color pair allowed only for string", color_string);
1058 }
1059
1060 gather_color_names (color_string, attr, color_names);
1061
1062 assert (color_names[FOREGROUND] != NULL);
1063
1064 if (color_names[BACKGROUND])
1065 {
1066 unsigned int i;
1067 const unsigned int color_sets[2][2] = { { FOREGROUND, BACKGROUND }, { BACKGROUND, FOREGROUND } };
1068 for (i = 0; i < 2; i++)
1069 {
1070 const unsigned int color1 = color_sets[i][0];
1071 const unsigned int color2 = color_sets[i][1];
1072 if (CHECK_COLORS_RANDOM (color1, color2))
1073 vfprintf_fail (formats[FMT_RANDOM], tables[color1].desc, color_names[color1]->orig, "cannot be combined with", color_names[color2]->orig);
1074 }
1075 }
1076
1077 find_color_entries (color_names, colors);
1078 assert (colors[FOREGROUND] != NULL);
1079 free_color_names (color_names);
1080
1081 if (!colors[FOREGROUND]->code && colors[BACKGROUND] && colors[BACKGROUND]->code)
1082 {
1083 struct color_name color_name;
1084 color_name.name = color_name.orig = "default";
1085
1086 find_color_entry (&color_name, FOREGROUND, colors);
1087 assert (colors[FOREGROUND]->code != NULL);
1088 }
1089
1090 process_file_arg (file_string, file, stream);
1091 }
1092
1093 static void
1094 process_file_arg (const char *file_string, const char **file, FILE **stream)
1095 {
1096 if (file_string)
1097 {
1098 if (streq (file_string, "-"))
1099 *stream = stdin;
1100 else
1101 {
1102 const char *file = file_string;
1103 struct stat sb;
1104 int ret;
1105
1106 errno = 0;
1107 ret = stat (file, &sb);
1108
1109 if (ret == -1)
1110 vfprintf_fail (formats[FMT_FILE], file, strerror (errno));
1111
1112 if (!VALID_FILE_TYPE (sb.st_mode))
1113 vfprintf_fail (formats[FMT_TYPE], file, "unrecognized type", get_file_type (sb.st_mode));
1114
1115 *stream = open_file (file, "r");
1116 STACK_FILE (*stream);
1117 }
1118 *file = file_string;
1119 }
1120 else
1121 {
1122 *stream = stdin;
1123 *file = "stdin";
1124 }
1125
1126 assert (*stream != NULL);
1127 assert (*file != NULL);
1128 }
1129
1130 static bool
1131 skip_path_colors (const char *color_string, const char *file_string, const struct stat *sb, const bool has_conf)
1132 {
1133 bool have_file;
1134 unsigned int c;
1135 const char *color = color_string;
1136 const mode_t mode = sb->st_mode;
1137
1138 for (c = 1; c <= 2 && *color; c++)
1139 {
1140 bool matched = false;
1141 unsigned int i;
1142 for (i = 0; i < tables[GENERIC].count; i++)
1143 {
1144 const struct color *entry = &tables[GENERIC].entries[i];
1145 if (has_color_name (color, entry->name))
1146 {
1147 color += strlen (entry->name);
1148 matched = true;
1149 break;
1150 }
1151 }
1152 if (!matched && has_color_name (color, "random"))
1153 {
1154 color += strlen ("random");
1155 matched = true;
1156 }
1157 if (matched && *color == COLOR_SEP_CHAR && *(color + 1))
1158 color++;
1159 else
1160 break;
1161 }
1162
1163 have_file = (*color != '\0');
1164
1165 if (have_file)
1166 {
1167 const char *file_existing = color_string;
1168 if (file_string)
1169 vfprintf_fail (formats[FMT_QUOTE], get_file_type (mode), file_existing, "cannot be used as color string");
1170 else
1171 {
1172 if (VALID_FILE_TYPE (mode))
1173 {
1174 if (has_conf)
1175 return true;
1176 vfprintf_fail (formats[FMT_QUOTE], get_file_type (mode), file_existing, "must be preceded by color string");
1177 }
1178 else
1179 vfprintf_fail (formats[FMT_QUOTE], get_file_type (mode), file_existing, "is not a valid file type");
1180 }
1181 }
1182 return false;
1183 }
1184
1185 static void
1186 gather_color_names (const char *color_string, char *attr, struct color_name **color_names)
1187 {
1188 unsigned int index;
1189 char *color, *p, *str;
1190
1191 str = xstrdup (color_string);
1192 STACK_VAR (str);
1193
1194 for (index = 0, color = str; *color; index++, color = p)
1195 {
1196 char *ch, *sep;
1197
1198 p = NULL;
1199 if ((sep = strchr (color, COLOR_SEP_CHAR)))
1200 {
1201 *sep = '\0';
1202 p = sep + 1;
1203 }
1204 else
1205 p = color + strlen (color);
1206 assert (p != NULL);
1207
1208 for (ch = color; *ch; ch++)
1209 if (!isalpha (*ch))
1210 vfprintf_fail (formats[FMT_COLOR], tables[index].desc, color, "cannot be made of non-alphabetic characters");
1211
1212 for (ch = color + 1; *ch; ch++)
1213 if (!islower (*ch))
1214 vfprintf_fail (formats[FMT_COLOR], tables[index].desc, color, "cannot be in mixed lower/upper case");
1215
1216 if (streq (color, "None"))
1217 vfprintf_fail (formats[FMT_COLOR], tables[index].desc, color, "cannot be bold");
1218
1219 if (isupper (*color))
1220 {
1221 switch (index)
1222 {
1223 case FOREGROUND:
1224 snprintf (attr + strlen (attr), 3, "1;");
1225 break;
1226 case BACKGROUND:
1227 vfprintf_fail (formats[FMT_COLOR], tables[BACKGROUND].desc, color, "cannot be bold");
1228 break;
1229 default: /* never reached */
1230 ABORT_TRACE ();
1231 }
1232 }
1233
1234 color_names[index] = xcalloc (1, sizeof (struct color_name));
1235 STACK_VAR (color_names[index]);
1236
1237 color_names[index]->orig = xstrdup (color);
1238 STACK_VAR (color_names[index]->orig);
1239
1240 for (ch = color; *ch; ch++)
1241 *ch = tolower (*ch);
1242
1243 color_names[index]->name = xstrdup (color);
1244 STACK_VAR (color_names[index]->name);
1245 }
1246
1247 RELEASE (str);
1248 }
1249
1250 static void
1251 read_print_stream (const char *attr, const struct color **colors, const char *file, FILE *stream)
1252 {
1253 char buf[BUF_SIZE + 1];
1254 unsigned int flags = 0;
1255
1256 while (!feof (stream))
1257 {
1258 size_t bytes_read;
1259 char *eol;
1260 const char *line;
1261 bytes_read = fread (buf, 1, BUF_SIZE, stream);
1262 if (bytes_read != BUF_SIZE && ferror (stream))
1263 vfprintf_fail (formats[FMT_ERROR], BUF_SIZE, "read");
1264 buf[bytes_read] = '\0';
1265 line = buf;
1266 while ((eol = strpbrk (line, "\n\r")))
1267 {
1268 const bool has_text = (eol > line);
1269 const char *p;
1270 flags &= ~(CR|LF);
1271 if (*eol == '\r')
1272 {
1273 flags |= CR;
1274 if (*(eol + 1) == '\n')
1275 flags |= LF;
1276 }
1277 else if (*eol == '\n')
1278 flags |= LF;
1279 else /* never reached */
1280 vfprintf_fail (formats[FMT_FILE], file, "unrecognized line ending");
1281 p = eol + SKIP_LINE_ENDINGS (flags);
1282 *eol = '\0';
1283 print_line (attr, colors, line, flags,
1284 omit_color_empty ? has_text : true);
1285 line = p;
1286 }
1287 if (feof (stream))
1288 {
1289 if (*line != '\0')
1290 print_line (attr, colors, line, 0, true);
1291 }
1292 else if (*line != '\0')
1293 {
1294 char *p;
1295 if ((clean || clean_all) && (p = strrchr (line, '\033')))
1296 merge_print_line (line, p, stream);
1297 else
1298 print_line (attr, colors, line, 0, true);
1299 }
1300 }
1301 }
1302
1303 static void
1304 merge_print_line (const char *line, const char *p, FILE *stream)
1305 {
1306 char *buf = NULL;
1307 char *merged_esc = NULL;
1308 const char *esc = "";
1309 const char char_restore = *p;
1310
1311 complete_part_line (p + 1, &buf, stream);
1312
1313 if (buf)
1314 {
1315 /* form escape sequence */
1316 esc = merged_esc = str_concat (p, buf);
1317 /* shorten partial line accordingly */
1318 *(char *)p = '\0';
1319 free (buf);
1320 }
1321
1322 #ifdef TEST_MERGE_PART_LINE
1323 printf ("%s%s", line, esc);
1324 fflush (stdout);
1325 _exit (EXIT_SUCCESS);
1326 #else
1327 print_clean (line);
1328 *(char *)p = char_restore;
1329 print_clean (esc);
1330 free (merged_esc);
1331 #endif
1332 }
1333
1334 static void
1335 complete_part_line (const char *p, char **buf, FILE *stream)
1336 {
1337 bool got_next_char = false, read_from_stream;
1338 char ch;
1339 size_t i = 0, size;
1340
1341 if (get_next_char (&ch, &p, stream, &read_from_stream))
1342 {
1343 if (ch == '[')
1344 {
1345 if (read_from_stream)
1346 save_char (ch, buf, &i, &size);
1347 }
1348 else
1349 {
1350 if (read_from_stream)
1351 ungetc ((int)ch, stream);
1352 return; /* cancel */
1353 }
1354 }
1355 else
1356 return; /* cancel */
1357
1358 while (get_next_char (&ch, &p, stream, &read_from_stream))
1359 {
1360 if (isdigit (ch) || ch == ';')
1361 {
1362 if (read_from_stream)
1363 save_char (ch, buf, &i, &size);
1364 }
1365 else /* got next character */
1366 {
1367 got_next_char = true;
1368 break;
1369 }
1370 }
1371
1372 if (got_next_char)
1373 {
1374 if (ch == 'm')
1375 {
1376 if (read_from_stream)
1377 save_char (ch, buf, &i, &size);
1378 }
1379 else
1380 {
1381 if (read_from_stream)
1382 ungetc ((int)ch, stream);
1383 return; /* cancel */
1384 }
1385 }
1386 else
1387 return; /* cancel */
1388 }
1389
1390 static bool
1391 get_next_char (char *ch, const char **p, FILE *stream, bool *read_from_stream)
1392 {
1393 if (**p == '\0')
1394 {
1395 int c;
1396 if ((c = fgetc (stream)) != EOF)
1397 {
1398 *ch = (char)c;
1399 *read_from_stream = true;
1400 return true;
1401 }
1402 else
1403 {
1404 *read_from_stream = false;
1405 return false;
1406 }
1407 }
1408 else
1409 {
1410 *ch = **p;
1411 (*p)++;
1412 *read_from_stream = false;
1413 return true;
1414 }
1415 }
1416
1417 static void
1418 save_char (char ch, char **buf, size_t *i, size_t *size)
1419 {
1420 if (!*buf)
1421 {
1422 *size = ALLOC_COMPLETE_PART_LINE;
1423 *buf = xmalloc (*size);
1424 }
1425 /* +1: effective occupied size of buffer */
1426 else if ((*i + 1) == *size)
1427 {
1428 *size *= 2;
1429 *buf = xrealloc (*buf, *size);
1430 }
1431 (*buf)[*i] = ch;
1432 (*buf)[*i + 1] = '\0';
1433 (*i)++;
1434 }
1435
1436 static void
1437 find_color_entries (struct color_name **color_names, const struct color **colors)
1438 {
1439 struct timeval tv;
1440 unsigned int index;
1441
1442 /* randomness */
1443 gettimeofday (&tv, NULL);
1444 srand (tv.tv_usec * tv.tv_sec);
1445
1446 for (index = 0; color_names[index]; index++)
1447 {
1448 const char *color_name = color_names[index]->name;
1449
1450 const unsigned int count = tables[index].count;
1451 const struct color *const color_entries = tables[index].entries;
1452
1453 if (streq (color_name, "random"))
1454 {
1455 bool excludable;
1456 unsigned int i;
1457 do {
1458 excludable = false;
1459 i = rand() % (count - 2) + 1; /* omit color none and default */
1460 switch (index)
1461 {
1462 case FOREGROUND:
1463 /* --exclude-random */
1464 if (exclude && streq (exclude, color_entries[i].name))
1465 excludable = true;
1466 else if (color_names[BACKGROUND] && streq (color_names[BACKGROUND]->name, color_entries[i].name))
1467 excludable = true;
1468 break;
1469 case BACKGROUND:
1470 if (streq (colors[FOREGROUND]->name, color_entries[i].name))
1471 excludable = true;
1472 break;
1473 default: /* never reached */
1474 ABORT_TRACE ();
1475 }
1476 } while (excludable);
1477 colors[index] = (struct color *)&color_entries[i];
1478 }
1479 else
1480 find_color_entry (color_names[index], index, colors);
1481 }
1482 }
1483
1484 static void
1485 find_color_entry (const struct color_name *color_name, unsigned int index, const struct color **colors)
1486 {
1487 bool found = false;
1488 unsigned int i;
1489
1490 const unsigned int count = tables[index].count;
1491 const struct color *const color_entries = tables[index].entries;
1492
1493 for (i = 0; i < count; i++)
1494 if (streq (color_name->name, color_entries[i].name))
1495 {
1496 colors[index] = (struct color *)&color_entries[i];
1497 found = true;
1498 break;
1499 }
1500 if (!found)
1501 vfprintf_fail (formats[FMT_COLOR], tables[index].desc, color_name->orig, "not recognized");
1502 }
1503
1504 static void
1505 print_line (const char *attr, const struct color **colors, const char *const line, unsigned int flags, bool emit_colors)
1506 {
1507 /* --clean[-all] */
1508 if (clean || clean_all)
1509 print_clean (line);
1510 /* skip for --omit-color-empty? */
1511 else if (emit_colors)
1512 {
1513 /* Foreground color code is guaranteed to be set when background color code is present. */
1514 if (colors[BACKGROUND] && colors[BACKGROUND]->code)
1515 printf ("\033[%s", colors[BACKGROUND]->code);
1516 if (colors[FOREGROUND]->code)
1517 printf ("\033[%s%s%s\033[0m", attr, colors[FOREGROUND]->code, line);
1518 else
1519 printf (formats[FMT_GENERIC], line);
1520 }
1521 if (flags & CR)
1522 putchar ('\r');
1523 if (flags & LF)
1524 putchar ('\n');
1525 }
1526
1527 static void
1528 print_clean (const char *line)
1529 {
1530 const char *p = line;
1531
1532 if (is_esc (p))
1533 p = get_end_of_esc (p);
1534
1535 while (*p != '\0')
1536 {
1537 const char *text_start = p;
1538 const char *text_end = get_end_of_text (p);
1539 print_text (text_start, text_end - text_start);
1540 p = get_end_of_esc (text_end);
1541 }
1542 }
1543
1544 static bool
1545 is_esc (const char *p)
1546 {
1547 return gather_esc_offsets (p, NULL, NULL);
1548 }
1549
1550 static const char *
1551 get_end_of_esc (const char *p)
1552 {
1553 const char *esc;
1554 const char *end = NULL;
1555 while ((esc = strchr (p, '\033')))
1556 {
1557 if (gather_esc_offsets (esc, NULL, &end))
1558 break;
1559 p = esc + 1;
1560 }
1561 return end ? end + 1 : p + strlen (p);
1562 }
1563
1564 static const char *
1565 get_end_of_text (const char *p)
1566 {
1567 const char *esc;
1568 const char *start = NULL;
1569 while ((esc = strchr (p, '\033')))
1570 {
1571 if (gather_esc_offsets (esc, &start, NULL))
1572 break;
1573 p = esc + 1;
1574 }
1575 return start ? start : p + strlen (p);
1576 }
1577
1578 static void
1579 print_text (const char *p, size_t len)
1580 {
1581 size_t bytes_written;
1582 bytes_written = fwrite (p, 1, len, stdout);
1583 if (bytes_written != len)
1584 vfprintf_fail (formats[FMT_ERROR], (unsigned long)len, "written");
1585 }
1586
1587 static bool
1588 gather_esc_offsets (const char *p, const char **start, const char **end)
1589 {
1590 /* ESC[ */
1591 if (*p == 27 && *(p + 1) == '[')
1592 {
1593 bool valid = false;
1594 const char *const begin = p;
1595 p += 2;
1596 if (clean_all)
1597 valid = validate_esc_clean_all (&p);
1598 else if (clean)
1599 {
1600 bool check_values;
1601 unsigned int prev_iter, iter;
1602 const char *digit;
1603 prev_iter = iter = 0;
1604 do {
1605 check_values = false;
1606 iter++;
1607 if (!isdigit (*p))
1608 break;
1609 digit = p;
1610 while (isdigit (*p))
1611 p++;
1612 if (p - digit > 2)
1613 break;
1614 else /* check range */
1615 {
1616 char val[3];
1617 int value;
1618 unsigned int i;
1619 const unsigned int digits = p - digit;
1620 for (i = 0; i < digits; i++)
1621 val[i] = *digit++;
1622 val[i] = '\0';
1623 value = atoi (val);
1624 valid = validate_esc_clean (value, iter, &prev_iter, &p, &check_values);
1625 }
1626 } while (check_values);
1627 }
1628 if (valid)
1629 {
1630 if (start)
1631 *start = begin;
1632 if (end)
1633 *end = p;
1634 return true;
1635 }
1636 }
1637 return false;
1638 }
1639
1640 static bool
1641 validate_esc_clean_all (const char **p)
1642 {
1643 while (isdigit (**p) || **p == ';')
1644 (*p)++;
1645 return (**p == 'm');
1646 }
1647
1648 static bool
1649 validate_esc_clean (int value, unsigned int iter, unsigned int *prev_iter, const char **p, bool *check_values)
1650 {
1651 if (is_reset (value, iter, p))
1652 return true;
1653 else if (is_attr (value, iter, *prev_iter, p))
1654 {
1655 (*p)++;
1656 *check_values = true;
1657 *prev_iter = iter;
1658 return false; /* partial escape sequence, need another valid value */
1659 }
1660 else if (is_fg_color (value, p))
1661 return true;
1662 else if (is_bg_color (value, iter, p))
1663 return true;
1664 else
1665 return false;
1666 }
1667
1668 static bool
1669 is_reset (int value, unsigned int iter, const char **p)
1670 {
1671 return (value == 0 && iter == 1 && **p == 'm');
1672 }
1673
1674 static bool
1675 is_attr (int value, unsigned int iter, unsigned int prev_iter, const char **p)
1676 {
1677 return ((value > 0 && value < 10) && (iter - prev_iter == 1) && **p == ';');
1678 }
1679
1680 static bool
1681 is_fg_color (int value, const char **p)
1682 {
1683 return (((value >= 30 && value <= 37) || value == 39) && **p == 'm');
1684 }
1685
1686 static bool
1687 is_bg_color (int value, unsigned int iter, const char **p)
1688 {
1689 return (((value >= 40 && value <= 47) || value == 49) && iter == 1 && **p == 'm');
1690 }
1691
1692 #if !DEBUG
1693 static void *
1694 malloc_wrap (size_t size)
1695 {
1696 void *p = malloc (size);
1697 if (!p)
1698 MEM_ALLOC_FAIL ();
1699 return p;
1700 }
1701
1702 static void *
1703 calloc_wrap (size_t nmemb, size_t size)
1704 {
1705 void *p = calloc (nmemb, size);
1706 if (!p)
1707 MEM_ALLOC_FAIL ();
1708 return p;
1709 }
1710
1711 static void *
1712 realloc_wrap (void *ptr, size_t size)
1713 {
1714 void *p = realloc (ptr, size);
1715 if (!p)
1716 MEM_ALLOC_FAIL ();
1717 return p;
1718 }
1719 #else
1720 static const char *const format_debug = "%s: %10s %7lu bytes [source file %s, line %5u]\n";
1721 static void *
1722 malloc_wrap_debug (size_t size, const char *file, unsigned int line)
1723 {
1724 void *p = malloc (size);
1725 if (!p)
1726 MEM_ALLOC_FAIL_DEBUG (file, line);
1727 fprintf (log, format_debug, program_name, "malloc'ed", (unsigned long)size, file, line);
1728 return p;
1729 }
1730
1731 static void *
1732 calloc_wrap_debug (size_t nmemb, size_t size, const char *file, unsigned int line)
1733 {
1734 void *p = calloc (nmemb, size);
1735 if (!p)
1736 MEM_ALLOC_FAIL_DEBUG (file, line);
1737 fprintf (log, format_debug, program_name, "calloc'ed", (unsigned long)(nmemb * size), file, line);
1738 return p;
1739 }
1740
1741 static void *
1742 realloc_wrap_debug (void *ptr, size_t size, const char *file, unsigned int line)
1743 {
1744 void *p = realloc (ptr, size);
1745 if (!p)
1746 MEM_ALLOC_FAIL_DEBUG (file, line);
1747 fprintf (log, format_debug, program_name, "realloc'ed", (unsigned long)size, file, line);
1748 return p;
1749 }
1750 #endif /* !DEBUG */
1751
1752 static void
1753 free_wrap (void **ptr)
1754 {
1755 free (*ptr);
1756 *ptr = NULL;
1757 }
1758
1759 #if !DEBUG
1760 # define do_malloc(len, file, line) malloc_wrap(len)
1761 #else
1762 # define do_malloc(len, file, line) malloc_wrap_debug(len, file, line)
1763 #endif
1764
1765 static char *
1766 strdup_wrap (const char *str, const char *file, unsigned int line)
1767 {
1768 const size_t len = strlen (str) + 1;
1769 char *p = do_malloc (len, file, line);
1770 strncpy (p, str, len);
1771 return p;
1772 }
1773
1774 static char *
1775 str_concat_wrap (const char *str1, const char *str2, const char *file, unsigned int line)
1776 {
1777 const size_t len = strlen (str1) + strlen (str2) + 1;
1778 char *p, *str;
1779
1780 p = str = do_malloc (len, file, line);
1781 strncpy (p, str1, strlen (str1));
1782 p += strlen (str1);
1783 strncpy (p, str2, strlen (str2));
1784 p += strlen (str2);
1785 *p = '\0';
1786
1787 return str;
1788 }
1789
1790 static char *
1791 expand_string (const char *str)
1792 {
1793 char *s = NULL;
1794 wordexp_t p;
1795
1796 wordexp (str, &p, 0);
1797 if (p.we_wordc >= 1)
1798 s = xstrdup (p.we_wordv[0]);
1799 wordfree (&p);
1800
1801 return s;
1802 }
1803
1804 static bool
1805 get_bytes_size (unsigned long bytes, struct bytes_size *bytes_size)
1806 {
1807 const char *unit, units[] = { '0', 'K', 'M', 'G', '\0' };
1808 unsigned long size = bytes;
1809 if (bytes < 1024)
1810 return false;
1811 unit = units;
1812 while (size >= 1024 && *(unit + 1))
1813 {
1814 size /= 1024;
1815 unit++;
1816 }
1817 bytes_size->size = (unsigned int)size;
1818 bytes_size->unit = *unit;
1819 return true;
1820 }
1821
1822 static char *
1823 get_file_type (mode_t mode)
1824 {
1825 if (S_ISREG (mode))
1826 return "file";
1827 else if (S_ISDIR (mode))
1828 return "directory";
1829 else if (S_ISCHR (mode))
1830 return "character device";
1831 else if (S_ISBLK (mode))
1832 return "block device";
1833 else if (S_ISFIFO (mode))
1834 return "named pipe";
1835 else if (S_ISLNK (mode))
1836 return "symbolic link";
1837 else if (S_ISSOCK (mode))
1838 return "socket";
1839 else
1840 return "file";
1841 }
1842
1843 static bool
1844 has_color_name (const char *str, const char *name)
1845 {
1846 char *p;
1847
1848 assert (strlen (str) > 0);
1849 assert (strlen (name) > 0);
1850
1851 if (!(*str == *name || *str == toupper (*name)))
1852 return false;
1853 else if (*(name + 1) != '\0'
1854 && !((p = strstr (str + 1, name + 1)) && p == str + 1))
1855 return false;
1856 else
1857 return true;
1858 }
1859
1860 static FILE *
1861 open_file (const char *file, const char *mode)
1862 {
1863 FILE *stream;
1864
1865 errno = 0;
1866 stream = fopen (file, mode);
1867 if (!stream)
1868 vfprintf_fail (formats[FMT_FILE], file, strerror (errno));
1869
1870 return stream;
1871 }
1872
1873 #define DO_VFPRINTF(fmt) \
1874 va_list ap; \
1875 fprintf (stderr, "%s: ", program_name); \
1876 va_start (ap, fmt); \
1877 vfprintf (stderr, fmt, ap); \
1878 va_end (ap); \
1879 fprintf (stderr, "\n");
1880
1881 static void
1882 vfprintf_diag (const char *fmt, ...)
1883 {
1884 DO_VFPRINTF (fmt);
1885 }
1886
1887 static void
1888 vfprintf_fail (const char *fmt, ...)
1889 {
1890 DO_VFPRINTF (fmt);
1891 exit (EXIT_FAILURE);
1892 }
1893
1894 static void
1895 stack (struct var_list **list, unsigned int *stacked, unsigned int index, void *ptr, enum var_type type)
1896 {
1897 struct var_list *var;
1898 /* nothing to stack */
1899 if (ptr == NULL)
1900 return;
1901 if (!*list)
1902 *list = xmalloc (sizeof (struct var_list));
1903 else
1904 {
1905 unsigned int i;
1906 for (i = 0; i < *stacked; i++)
1907 {
1908 var = &(*list)[i];
1909 if (var->type == IS_UNUSED)
1910 {
1911 var->ptr = ptr;
1912 var->type = type;
1913 return; /* reused */
1914 }
1915 }
1916 *list = xrealloc (*list, (*stacked + 1) * sizeof (struct var_list));
1917 }
1918 var = &(*list)[index];
1919 var->ptr = ptr;
1920 var->type = type;
1921 (*stacked)++;
1922 }
1923
1924 static void
1925 release (struct var_list *list, unsigned int stacked, void **ptr)
1926 {
1927 unsigned int i;
1928 /* nothing to release */
1929 if (*ptr == NULL)
1930 return;
1931 for (i = 0; i < stacked; i++)
1932 {
1933 struct var_list *var = &list[i];
1934 if (var->type != IS_UNUSED
1935 && var->ptr == *ptr)
1936 {
1937 switch (var->type)
1938 {
1939 case IS_GENERIC:
1940 free (*ptr);
1941 break;
1942 case IS_FILE:
1943 fclose (*ptr);
1944 break;
1945 default: /* never reached */
1946 ABORT_TRACE ();
1947 }
1948 *ptr = NULL;
1949 var->ptr = NULL;
1950 var->type = IS_UNUSED;
1951 return;
1952 }
1953 }
1954 }
Colorize text on terminal with ANSI escape sequences