stest.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <stdbool.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <unistd.h>
   7 #include <sys/stat.h>
   8
   9 #define OPER(x)  (oper[(x)-'a'])
  10
  11 static bool test(const char *);
  12
  13 static bool quiet = false;
  14 static bool oper[26];
  15 static struct stat old, new;
  16
  17 int
  18 main(int argc, char *argv[]) {
  19         char buf[BUFSIZ], *p;
  20         bool match = false;
  21         int opt;
  22
  23         while((opt = getopt(argc, argv, "C:bcdefghn:o:pqrsuwx")) != -1)
  24                 switch(opt) {
  25                 case 'C': /* tests relative to directory */
  26                         if(chdir(optarg) == -1) {
  27                                 perror(optarg);
  28                                 exit(2);
  29                         }
  30                         break;
  31                 case 'n': /* newer than file */
  32                 case 'o': /* older than file */
  33                         if(!(OPER(opt) = stat(optarg, (opt == 'n' ? &new : &old)) == 0))
  34                                 perror(optarg);
  35                         break;
  36                 case 'q': /* quiet (no output, just status) */
  37                         quiet = true;
  38                         break;
  39                 default:  /* miscellaneous operators */
  40                         OPER(opt) = true;
  41                         break;
  42                 case '?': /* error: unknown flag */
  43                         fprintf(stderr, "usage: %s [-bcdefghpqrsuwx] [-C dir] [-n file] [-o file] [file...]\n", argv[0]);
  44                         exit(2);
  45                 }
  46         if(optind == argc)
  47                 while(fgets(buf, sizeof buf, stdin)) {
  48                         if(*(p = &buf[strlen(buf)-1]) == '\n')
  49                                 *p = '\0';
  50                         match |= test(buf);
  51                 }
  52         else
  53                 while(optind < argc)
  54                         match |= test(argv[optind++]);
  55
  56         return match ? 0 : 1;
  57 }
  58
  59 bool
  60 test(const char *path) {
  61         struct stat st;
  62
  63         if((!OPER('b') || (stat(path, &st) == 0 && S_ISBLK(st.st_mode)))        /* block special     */
  64         && (!OPER('c') || (stat(path, &st) == 0 && S_ISCHR(st.st_mode)))        /* character special */
  65         && (!OPER('d') || (stat(path, &st) == 0 && S_ISDIR(st.st_mode)))        /* directory         */
  66         && (!OPER('e') || (access(path, F_OK) == 0))                            /* exists            */
  67         && (!OPER('f') || (stat(path, &st) == 0 && S_ISREG(st.st_mode)))        /* regular file      */
  68         && (!OPER('g') || (stat(path, &st) == 0 && (st.st_mode & S_ISGID)))     /* set-group-id flag */
  69         && (!OPER('h') || (lstat(path, &st) == 0 && S_ISLNK(st.st_mode)))       /* symbolic link     */
  70         && (!OPER('n') || (stat(path, &st) == 0 && st.st_mtime > new.st_mtime)) /* newer than file   */
  71         && (!OPER('o') || (stat(path, &st) == 0 && st.st_mtime < old.st_mtime)) /* older than file   */
  72         && (!OPER('p') || (stat(path, &st) == 0 && S_ISFIFO(st.st_mode)))       /* named pipe        */
  73         && (!OPER('r') || (access(path, R_OK) == 0))                            /* readable          */
  74         && (!OPER('s') || (stat(path, &st) == 0 && st.st_size > 0))             /* not empty         */
  75         && (!OPER('u') || (stat(path, &st) == 0 && (st.st_mode & S_ISUID)))     /* set-user-id flag  */
  76         && (!OPER('w') || (access(path, W_OK) == 0))                            /* writable          */
  77         && (!OPER('x') || (access(path, X_OK) == 0))) {                         /* executable        */
  78                 if(quiet)
  79                         exit(0);
  80                 puts(path);
  81                 return true;
  82         }
  83         else
  84                 return false;
  85 }