/* * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* $OpenBSD: fsmagic.c,v 1.3 1997/02/09 23:58:24 millert Exp $ */ /* * fsmagic - magic based on filesystem info - directory, special files, etc. * * Copyright (c) Ian F. Darwin, 1987. * Written by Ian F. Darwin. * * This software is not subject to any license of the American Telephone * and Telegraph Company or of the Regents of the University of California. * * Permission is granted to anyone to use this software for any purpose on * any computer system, and to alter it and redistribute it freely, subject * to the following restrictions: * * 1. The author is not responsible for the consequences of use of this * software, no matter how awful, even if they arise from flaws in it. * * 2. The origin of this software must not be misrepresented, either by * explicit claim or by omission. Since few users ever read sources, * credits must appear in the documentation. * * 3. Altered versions must be plainly marked as such, and must not be * misrepresented as being the original software. Since few users * ever read sources, credits must appear in the documentation. * * 4. This notice may not be removed or altered. */ #include <stdio.h> #include <string.h> #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> #include <stdlib.h> #ifndef major # if defined(__SVR4) || defined(_SVR4_SOURCE) # include <sys/mkdev.h> # endif #endif #ifndef major /* if `major' not defined in types.h, */ #include <sys/sysmacros.h> /* try this one. */ #endif #ifndef major /* still not defined? give up, manual intervention needed */ /* If cc tries to compile this, read and act on it. */ /* On most systems cpp will discard it automatically */ Congratulations, you have found a portability bug. Please grep /usr/include/sys and edit the above #include to point at the file that defines the "major" macro. #endif /*major*/ #include "file.h" #ifndef lint #if 0 static char *moduleid = "$OpenBSD: fsmagic.c,v 1.3 1997/02/09 23:58:24 millert Exp $"; #endif #endif /* lint */ int fsmagic(fn, sb) const char *fn; struct stat *sb; { int ret = 0; /* * Fstat is cheaper but fails for files you don't have read perms on. * On 4.2BSD and similar systems, use lstat() to identify symlinks. */ #ifdef S_IFLNK if (!lflag) ret = lstat(fn, sb); else #endif ret = stat(fn, sb); /* don't merge into if; see "ret =" above */ if (ret) { ckfprintf(stdout, /* Yes, I do mean stdout. */ /* No \n, caller will provide. */ "can't stat `%s' (%s).", fn, strerror(errno)); return 1; } if (sb->st_mode & S_ISUID) ckfputs("setuid ", stdout); if (sb->st_mode & S_ISGID) ckfputs("setgid ", stdout); if (sb->st_mode & S_ISVTX) ckfputs("sticky ", stdout); switch (sb->st_mode & S_IFMT) { case S_IFDIR: ckfputs("directory", stdout); return 1; case S_IFCHR: (void) printf("character special (%ld/%ld)", (long) major(sb->st_rdev), (long) minor(sb->st_rdev)); return 1; case S_IFBLK: (void) printf("block special (%ld/%ld)", (long) major(sb->st_rdev), (long) minor(sb->st_rdev)); return 1; /* TODO add code to handle V7 MUX and Blit MUX files */ #ifdef S_IFIFO case S_IFIFO: ckfputs("fifo (named pipe)", stdout); return 1; #endif #ifdef S_IFLNK case S_IFLNK: { char buf[BUFSIZ+4]; register int nch; struct stat tstatbuf; if ((nch = readlink(fn, buf, BUFSIZ-1)) <= 0) { ckfprintf(stdout, "unreadable symlink (%s).", strerror(errno)); return 1; } buf[nch] = '\0'; /* readlink(2) forgets this */ /* If broken symlink, say so and quit early. */ if (*buf == '/') { if (stat(buf, &tstatbuf) < 0) { ckfprintf(stdout, "broken symbolic link to %s", buf); return 1; } } else { char *tmp; char buf2[BUFSIZ+BUFSIZ+4]; if ((tmp = strrchr(fn, '/')) == NULL) { tmp = buf; /* in current directory anyway */ } else { strcpy (buf2, fn); /* take directory part */ buf2[tmp-fn+1] = '\0'; strcat (buf2, buf); /* plus (relative) symlink */ tmp = buf2; } if (stat(tmp, &tstatbuf) < 0) { ckfprintf(stdout, "broken symbolic link to %s", buf); return 1; } } /* Otherwise, handle it. */ if (lflag) { process(buf, strlen(buf)); return 1; } else { /* just print what it points to */ ckfputs("symbolic link to ", stdout); ckfputs(buf, stdout); } } return 1; #endif #ifdef S_IFSOCK #ifndef __COHERENT__ case S_IFSOCK: ckfputs("socket", stdout); return 1; #endif #endif case S_IFREG: break; default: error("invalid mode 0%o.\n", sb->st_mode); /*NOTREACHED*/ } /* * regular file, check next possibility */ if (sb->st_size == 0) { ckfputs("empty", stdout); return 1; } return 0; }