1 /* $OpenBSD: nftw.c,v 1.2 2003/07/21 21:15:32 millert Exp $ */ 2 3 /* 4 * Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 * 18 * Sponsored in part by the Defense Advanced Research Projects 19 * Agency (DARPA) and Air Force Research Laboratory, Air Force 20 * Materiel Command, USAF, under agreement number F39502-99-1-0512. 21 */ 22 23 #if defined(LIBC_SCCS) && !defined(lint) 24 static const char rcsid[] = "$OpenBSD: nftw.c,v 1.2 2003/07/21 21:15:32 millert Exp $"; 25 #endif /* LIBC_SCCS and not lint */ 26 27 #include <sys/types.h> 28 #include <sys/stat.h> 29 #include <errno.h> 30 #include <fts.h> 31 #include <ftw.h> 32 #include <limits.h> 33 34 int 35 nftw(const char *path, int (*fn)(const char *, const struct stat *, int, 36 struct FTW *), int nfds, int ftwflags) 37 { 38 const char *paths[2]; 39 struct FTW ftw; 40 FTSENT *cur; 41 FTS *ftsp; 42 int ftsflags, fnflag, error, postorder, sverrno; 43 44 /* XXX - nfds is currently unused */ 45 if (nfds < 1 || nfds > OPEN_MAX) { 46 errno = EINVAL; 47 return (-1); 48 } 49 50 ftsflags = FTS_COMFOLLOW; 51 if (!(ftwflags & FTW_CHDIR)) 52 ftsflags |= FTS_NOCHDIR; 53 if (ftwflags & FTW_MOUNT) 54 ftsflags |= FTS_XDEV; 55 if (ftwflags & FTW_PHYS) 56 ftsflags |= FTS_PHYSICAL; 57 postorder = (ftwflags & FTW_DEPTH) != 0; 58 paths[0] = path; 59 paths[1] = NULL; 60 ftsp = fts_open((char * const *)paths, ftsflags, NULL); 61 if (ftsp == NULL) 62 return (-1); 63 error = 0; 64 while ((cur = fts_read(ftsp)) != NULL) { 65 switch (cur->fts_info) { 66 case FTS_D: 67 if (postorder) 68 continue; 69 fnflag = FTW_D; 70 break; 71 case FTS_DNR: 72 fnflag = FTW_DNR; 73 break; 74 case FTS_DP: 75 if (!postorder) 76 continue; 77 fnflag = FTW_DP; 78 break; 79 case FTS_F: 80 case FTS_DEFAULT: 81 fnflag = FTW_F; 82 break; 83 case FTS_NS: 84 case FTS_NSOK: 85 fnflag = FTW_NS; 86 break; 87 case FTS_SL: 88 fnflag = FTW_SL; 89 break; 90 case FTS_SLNONE: 91 fnflag = FTW_SLN; 92 break; 93 case FTS_DC: 94 errno = ELOOP; 95 /* FALLTHROUGH */ 96 default: 97 error = -1; 98 goto done; 99 } 100 ftw.base = cur->fts_pathlen - cur->fts_namelen; 101 ftw.level = cur->fts_level; 102 error = fn(cur->fts_path, cur->fts_statp, fnflag, &ftw); 103 if (error != 0) 104 break; 105 } 106 done: 107 sverrno = errno; 108 (void) fts_close(ftsp); 109 errno = sverrno; 110 return (error); 111 } 112