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 }
