stest.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <dirent.h>
   3 #include <stdbool.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <unistd.h>
   8 #include <sys/stat.h>
   9
  10 #define FLAG(x)  (flag[(x)-'a'])
  11
  12 static void test(const char *, const char *);
  13
  14 static bool match = false;
  15 static bool flag[26];
  16 static struct stat old, new;
  17
  18 int
  19 main(int argc, char *argv[]) {
  20         struct dirent *d;
  21         char buf[BUFSIZ];
  22         DIR *dir;
  23         int opt;
  24
  25         while((opt = getopt(argc, argv, "abcdefghln:o:pqrsuwx")) != -1)
  26                 switch(opt) {
  27                 case 'n': /* newer than file */
  28                 case 'o': /* older than file */
  29                         if(!(FLAG(opt) = !stat(optarg, (opt == 'n' ? &new : &old))))
  30                                 perror(optarg);
  31                         break;
  32                 default:  /* miscellaneous operators */
  33                         FLAG(opt) = true;
  34                         break;
  35                 case '?': /* error: unknown flag */
  36                         fprintf(stderr, "usage: %s [-abcdefghlpqrsuwx] [-n file] [-o file] [file...]\n", argv[0]);
  37                         exit(2);
  38                 }
  39         for(; optind < argc; optind++)
  40                 if(FLAG('l') && (dir = opendir(argv[optind]))) {
  41                         /* test directory contents */
  42                         while((d = readdir(dir)))
  43                                 if(snprintf(buf, sizeof buf, "%s/%s", argv[optind], d->d_name) < sizeof buf)
  44                                         test(buf, d->d_name);
  45                         closedir(dir);
  46                 }
  47                 else
  48                         test(argv[optind], argv[optind]);
  49
  50         return match ? 0 : 1;
  51 }
  52
  53 void
  54 test(const char *path, const char *name) {
  55         struct stat st, ln;
  56
  57         if(!stat(path, &st) && ( FLAG('a') || name[0] != '.')         /* hidden files      */
  58         && (!FLAG('b') || S_ISBLK(st.st_mode))                        /* block special     */
  59         && (!FLAG('c') || S_ISCHR(st.st_mode))                        /* character special */
  60         && (!FLAG('d') || S_ISDIR(st.st_mode))                        /* directory         */
  61         && (!FLAG('e') || access(path, F_OK) == 0)                    /* exists            */
  62         && (!FLAG('f') || S_ISREG(st.st_mode))                        /* regular file      */
  63         && (!FLAG('g') || st.st_mode & S_ISGID)                       /* set-group-id flag */
  64         && (!FLAG('h') || (!lstat(path, &ln) && S_ISLNK(ln.st_mode))) /* symbolic link     */
  65         && (!FLAG('n') || st.st_mtime > new.st_mtime)                 /* newer than file   */
  66         && (!FLAG('o') || st.st_mtime < old.st_mtime)                 /* older than file   */
  67         && (!FLAG('p') || S_ISFIFO(st.st_mode))                       /* named pipe        */
  68         && (!FLAG('r') || access(path, R_OK) == 0)                    /* readable          */
  69         && (!FLAG('s') || st.st_size > 0)                             /* not empty         */
  70         && (!FLAG('u') || st.st_mode & S_ISUID)                       /* set-user-id flag  */
  71         && (!FLAG('w') || access(path, W_OK) == 0)                    /* writable          */
  72         && (!FLAG('x') || access(path, X_OK) == 0)) {                 /* executable        */
  73                 if(FLAG('q'))
  74                         exit(0);
  75                 match = true;
  76                 puts(name);
  77         }
  78 }