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 (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 }