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local/src/dmenu/stest.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <sys/stat.h>
   3 
   4 #include <dirent.h>
   5 #include <limits.h>
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9 #include <unistd.h>
  10 
  11 #include "arg.h"
  12 char *argv0;
  13 
  14 #define FLAG(x)  (flag[(x)-'a'])
  15 
  16 static void test(const char *, const char *);
  17 static void usage(void);
  18 
  19 static int match = 0;
  20 static int flag[26];
  21 static struct stat old, new;
  22 
  23 static void
  24 test(const char *path, const char *name)
  25 {
  26 	struct stat st, ln;
  27 
  28 	if ((!stat(path, &st) && (FLAG('a') || name[0] != '.')        /* hidden files      */
  29 	&& (!FLAG('b') || S_ISBLK(st.st_mode))                        /* block special     */
  30 	&& (!FLAG('c') || S_ISCHR(st.st_mode))                        /* character special */
  31 	&& (!FLAG('d') || S_ISDIR(st.st_mode))                        /* directory         */
  32 	&& (!FLAG('e') || access(path, F_OK) == 0)                    /* exists            */
  33 	&& (!FLAG('f') || S_ISREG(st.st_mode))                        /* regular file      */
  34 	&& (!FLAG('g') || st.st_mode & S_ISGID)                       /* set-group-id flag */
  35 	&& (!FLAG('h') || (!lstat(path, &ln) && S_ISLNK(ln.st_mode))) /* symbolic link     */
  36 	&& (!FLAG('n') || st.st_mtime > new.st_mtime)                 /* newer than file   */
  37 	&& (!FLAG('o') || st.st_mtime < old.st_mtime)                 /* older than file   */
  38 	&& (!FLAG('p') || S_ISFIFO(st.st_mode))                       /* named pipe        */
  39 	&& (!FLAG('r') || access(path, R_OK) == 0)                    /* readable          */
  40 	&& (!FLAG('s') || st.st_size > 0)                             /* not empty         */
  41 	&& (!FLAG('u') || st.st_mode & S_ISUID)                       /* set-user-id flag  */
  42 	&& (!FLAG('w') || access(path, W_OK) == 0)                    /* writable          */
  43 	&& (!FLAG('x') || access(path, X_OK) == 0)) != FLAG('v')) {   /* executable        */
  44 		if (FLAG('q'))
  45 			exit(0);
  46 		match = 1;
  47 		puts(name);
  48 	}
  49 }
  50 
  51 static void
  52 usage(void)
  53 {
  54 	fprintf(stderr, "usage: %s [-abcdefghlpqrsuvwx] "
  55 	        "[-n file] [-o file] [file...]\n", argv0);
  56 	exit(2); /* like test(1) return > 1 on error */
  57 }
  58 
  59 int
  60 main(int argc, char *argv[])
  61 {
  62 	struct dirent *d;
  63 	char path[PATH_MAX], *line = NULL, *file;
  64 	size_t linesiz = 0;
  65 	ssize_t n;
  66 	DIR *dir;
  67 	int r;
  68 
  69 	ARGBEGIN {
  70 	case 'n': /* newer than file */
  71 	case 'o': /* older than file */
  72 		file = EARGF(usage());
  73 		if (!(FLAG(ARGC()) = !stat(file, (ARGC() == 'n' ? &new : &old))))
  74 			perror(file);
  75 		break;
  76 	default:
  77 		/* miscellaneous operators */
  78 		if (strchr("abcdefghlpqrsuvwx", ARGC()))
  79 			FLAG(ARGC()) = 1;
  80 		else
  81 			usage(); /* unknown flag */
  82 	} ARGEND;
  83 
  84 	if (!argc) {
  85 		/* read list from stdin */
  86 		while ((n = getline(&line, &linesiz, stdin)) > 0) {
  87 			if (n && line[n - 1] == '\n')
  88 				line[n - 1] = '\0';
  89 			test(line, line);
  90 		}
  91 		free(line);
  92 	} else {
  93 		for (; argc; argc--, argv++) {
  94 			if (FLAG('l') && (dir = opendir(*argv))) {
  95 				/* test directory contents */
  96 				while ((d = readdir(dir))) {
  97 					r = snprintf(path, sizeof path, "%s/%s",
  98 					             *argv, d->d_name);
  99 					if (r >= 0 && (size_t)r < sizeof path)
 100 						test(path, d->d_name);
 101 				}
 102 				closedir(dir);
 103 			} else {
 104 				test(*argv, *argv);
 105 			}
 106 		}
 107 	}
 108 	return match ? 0 : 1;
 109 }