128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
/*
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* fsmagic - magic based on filesystem info - directory, special files, etc.
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*
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* Copyright (c) Ian F. Darwin, 1987.
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* Written by Ian F. Darwin.
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*
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* This software is not subject to any license of the American Telephone
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* and Telegraph Company or of the Regents of the University of California.
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*
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* Permission is granted to anyone to use this software for any purpose on
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* any computer system, and to alter it and redistribute it freely, subject
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* to the following restrictions:
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*
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* 1. The author is not responsible for the consequences of use of this
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* software, no matter how awful, even if they arise from flaws in it.
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*
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* 2. The origin of this software must not be misrepresented, either by
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* explicit claim or by omission. Since few users ever read sources,
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* credits must appear in the documentation.
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*
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* 3. Altered versions must be plainly marked as such, and must not be
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* misrepresented as being the original software. Since few users
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* ever read sources, credits must appear in the documentation.
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*
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* 4. This notice may not be removed or altered.
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#ifndef major /* if `major' not defined in types.h, */
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#include <sys/sysmacros.h> /* try this one. */
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#endif
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#ifndef major /* still not defined? give up, manual intervention needed */
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/* If cc tries to compile this, read and act on it. */
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/* On most systems cpp will discard it automatically */
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Congratulations, you have found a portability bug.
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Please grep /usr/include/sys and edit the above #include
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to point at the file that defines the major macro.
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#endif /*major*/
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#include <sys/stat.h>
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#include "file.h"
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#ifndef lint
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static char *moduleid =
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"@(#)$Header: /cvsroot/src/usr.bin/file/Attic/fsmagic.c,v 1.2 1993/05/19 06:21:23 cgd Exp $";
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#endif /* lint */
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extern char *progname;
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extern char *ckfmsg, *magicfile;
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extern int debug;
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extern FILE *efopen();
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fsmagic(fn)
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char *fn;
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{
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extern struct stat statbuf;
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#ifdef S_IFLNK
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char slink[PATH_MAX+1];
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#endif
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/*
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* Fstat is cheaper but fails for files you don't have read perms on.
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* On 4.2BSD and similar systems, use lstat() so identify symlinks.
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*/
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#ifdef S_IFLNK
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if (lstat(fn, &statbuf) <0)
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#else
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if (stat(fn, &statbuf) <0)
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#endif
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{
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warning("can't stat", "");
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return -1;
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}
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if (statbuf.st_mode & S_ISUID) ckfputs("setuid ", stdout);
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if (statbuf.st_mode & S_ISGID) ckfputs("setgid ", stdout);
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if (statbuf.st_mode & S_ISVTX) ckfputs("sticky ", stdout);
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switch (statbuf.st_mode & S_IFMT) {
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case S_IFDIR:
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ckfputs("directory", stdout);
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return 1;
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case S_IFCHR:
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(void) printf("character special (%d/%d)",
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major(statbuf.st_rdev), minor(statbuf.st_rdev));
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return 1;
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case S_IFBLK:
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(void) printf("block special (%d/%d)",
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major(statbuf.st_rdev), minor(statbuf.st_rdev));
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return 1;
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/* TODO add code to handle V7 MUX and Blit MUX files */
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#ifdef S_IFIFO
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case S_IFIFO:
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ckfputs("fifo (named pipe)", stdout);
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return 1;
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#endif
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#ifdef S_IFLNK
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case S_IFLNK:
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ckfputs("symbolic link", stdout);
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if (readlink(fn, slink, sizeof(slink)) >= 0) {
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ckfputs(" to ", stdout);
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ckfputs(slink, stdout);
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}
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return 1;
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#endif
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#ifdef S_IFSOCK
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case S_IFSOCK:
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ckfputs("socket", stdout);
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return 1;
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#endif
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case S_IFREG:
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break;
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default:
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warning("invalid st_mode %d in statbuf!", statbuf.st_mode);
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}
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/*
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* regular file, check next possibility
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*/
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if (statbuf.st_size == 0) {
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ckfputs("empty", stdout);
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return 1;
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}
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return 0;
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}
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