diff options
Diffstat (limited to 'contrib/file/file.c')
| -rw-r--r-- | contrib/file/file.c | 422 |
1 files changed, 190 insertions, 232 deletions
diff --git a/contrib/file/file.c b/contrib/file/file.c index 2ccd8ca..269ae86 100644 --- a/contrib/file/file.c +++ b/contrib/file/file.c @@ -1,35 +1,49 @@ /* + * Copyright (c) Ian F. Darwin 1986-1995. + * Software written by Ian F. Darwin and others; + * maintained 1995-present by Christos Zoulas and others. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice immediately at the beginning of the file, without modification, + * this list of conditions, and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Ian F. Darwin and others. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ +/* * file - find type of a file or files - main program. - * - * 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 "file.h" +#include "magic.h" + +#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> +#include <sys/types.h> #include <sys/param.h> /* for MAXPATHLEN */ +#include <sys/stat.h> #include <fcntl.h> /* for open() */ #ifdef RESTORE_TIME # if (__COHERENT__ >= 0x420) @@ -48,9 +62,14 @@ #ifdef HAVE_LOCALE_H #include <locale.h> #endif +#ifdef HAVE_WCHAR_H +#include <wchar.h> +#endif #ifdef HAVE_GETOPT_H #include <getopt.h> /* for long options (is this portable?)*/ +#else +#undef HAVE_GETOPT_LONG #endif #include <netinet/in.h> /* for byte swapping */ @@ -58,80 +77,65 @@ #include "patchlevel.h" #ifndef lint -FILE_RCSID("@(#)$Id: file.c,v 1.69 2003/02/27 20:47:46 christos Exp $") +FILE_RCSID("@(#)$Id: file.c,v 1.93 2004/04/07 14:23:55 christos Exp $") #endif /* lint */ #ifdef S_IFLNK -# define USAGE "Usage: %s [-bciknsvzL] [-f namefile] [-m magicfiles] file...\n" +#define SYMLINKFLAG "L" #else -# define USAGE "Usage: %s [-bciknsvz] [-f namefile] [-m magicfiles] file...\n" +#define SYMLINKFLAG "" #endif -#ifdef __EMX__ -static char *apptypeName = NULL; -int os2_apptype (const char *fn, char *buf, int nb); -#endif /* __EMX__ */ - -#ifndef MAGIC -# define MAGIC "/etc/magic" -#endif +# define USAGE "Usage: %s [-bcik" SYMLINKFLAG "nNsvz] [-f namefile] [-F separator] [-m magicfiles] file...\n %s -C -m magicfiles\n" #ifndef MAXPATHLEN #define MAXPATHLEN 512 #endif -int /* Global command-line options */ - debug = 0, /* debugging */ - lflag = 0, /* follow Symlinks (BSD only) */ +private int /* Global command-line options */ bflag = 0, /* brief output format */ - zflag = 0, /* follow (uncompress) compressed files */ - sflag = 0, /* read block special files */ - iflag = 0, nopad = 0, /* Don't pad output */ - nobuffer = 0, /* Do not buffer stdout */ - kflag = 0; /* Keep going after the first match */ - -int /* Misc globals */ - nmagic = 0; /* number of valid magic[]s */ + nobuffer = 0; /* Do not buffer stdout */ -struct magic *magic; /* array of magic entries */ +private const char *magicfile = 0; /* where the magic is */ +private const char *default_magicfile = MAGIC; +private char *separator = ":"; /* Default field separator */ -const char *magicfile = 0; /* where the magic is */ -const char *default_magicfile = MAGIC; +private char *progname; /* used throughout */ -char separator = ':'; /* Default field separator */ +private struct magic_set *magic; -char *progname; /* used throughout */ -int lineno; /* line number in the magic file */ - - -static void unwrap(char *fn); -static void usage(void); +private void unwrap(char *); +private void usage(void); #ifdef HAVE_GETOPT_LONG -static void help(void); +private void help(void); #endif #if 0 -static int byteconv4(int, int, int); -static short byteconv2(int, int, int); +private int byteconv4(int, int, int); +private short byteconv2(int, int, int); #endif int main(int, char *[]); +private void process(const char *, int); +private void load(const char *, int); + /* * main - parse arguments and handle options */ int -main(int argc, char **argv) +main(int argc, char *argv[]) { int c; - int action = 0, didsomefiles = 0, errflg = 0, ret = 0, app = 0; - char *mime, *home, *usermagic; + int action = 0, didsomefiles = 0, errflg = 0; + int flags = 0; + char *home, *usermagic; struct stat sb; -#define OPTSTRING "bcdf:F:ikm:nNsvzCL" +#define OPTSTRING "bcCdf:F:ikLm:nNprsvz" #ifdef HAVE_GETOPT_LONG int longindex; - static struct option long_options[] = + private struct option long_options[] = { {"version", 0, 0, 'v'}, {"help", 0, 0, 0}, @@ -146,7 +150,11 @@ main(int argc, char **argv) {"dereference", 0, 0, 'L'}, #endif {"magic-file", 1, 0, 'm'}, +#if defined(HAVE_UTIME) || defined(HAVE_UTIMES) + {"preserve-date", 0, 0, 'p'}, +#endif {"uncompress", 0, 0, 'z'}, + {"raw", 0, 0, 'r'}, {"no-buffer", 0, 0, 'n'}, {"no-pad", 0, 0, 'N'}, {"special-files", 0, 0, 's'}, @@ -201,37 +209,29 @@ main(int argc, char **argv) ++bflag; break; case 'c': - action = CHECK; + action = FILE_CHECK; break; case 'C': - action = COMPILE; + action = FILE_COMPILE; break; case 'd': - ++debug; + flags |= MAGIC_DEBUG|MAGIC_CHECK; break; case 'f': - if (!app) { - ret = apprentice(magicfile, action); - if (action) - exit(ret); - app = 1; - } + if(action) + usage(); + load(magicfile, flags); unwrap(optarg); ++didsomefiles; break; case 'F': - separator = *optarg; + separator = optarg; break; case 'i': - iflag++; - if ((mime = malloc(strlen(magicfile) + 6)) != NULL) { - (void)strcpy(mime, magicfile); - (void)strcat(mime, ".mime"); - magicfile = mime; - } + flags |= MAGIC_MIME; break; case 'k': - kflag = 1; + flags |= MAGIC_CONTINUE; break; case 'm': magicfile = optarg; @@ -242,21 +242,29 @@ main(int argc, char **argv) case 'N': ++nopad; break; +#if defined(HAVE_UTIME) || defined(HAVE_UTIMES) + case 'p': + flags |= MAGIC_PRESERVE_ATIME; + break; +#endif + case 'r': + flags |= MAGIC_RAW; + break; case 's': - sflag++; + flags |= MAGIC_DEVICES; break; case 'v': - (void) fprintf(stdout, "%s-%d.%d\n", progname, + (void) fprintf(stdout, "%s-%d.%.2d\n", progname, FILE_VERSION_MAJOR, patchlevel); (void) fprintf(stdout, "magic file from %s\n", magicfile); return 1; case 'z': - zflag++; + flags |= MAGIC_COMPRESS; break; #ifdef S_IFLNK case 'L': - ++lflag; + flags |= MAGIC_SYMLINK; break; #endif case '?': @@ -269,11 +277,26 @@ main(int argc, char **argv) usage(); } - if (!app) { - ret = apprentice(magicfile, action); - if (action) - exit(ret); - app = 1; + switch(action) { + case FILE_CHECK: + case FILE_COMPILE: + magic = magic_open(flags|MAGIC_CHECK); + if (magic == NULL) { + (void)fprintf(stderr, "%s: %s\n", progname, + strerror(errno)); + return 1; + } + c = action == FILE_CHECK ? magic_check(magic, magicfile) : + magic_compile(magic, magicfile); + if (c == -1) { + (void)fprintf(stderr, "%s: %s\n", progname, + magic_error(magic)); + return -1; + } + return 0; + default: + load(magicfile, flags); + break; } if (optind == argc) { @@ -284,7 +307,7 @@ main(int argc, char **argv) else { int i, wid, nw; for (wid = 0, i = optind; i < argc; i++) { - nw = strlen(argv[i]); + nw = file_mbswidth(argv[i]); if (nw > wid) wid = nw; } @@ -296,10 +319,27 @@ main(int argc, char **argv) } +private void +load(const char *m, int flags) +{ + if (magic) + return; + magic = magic_open(flags); + if (magic == NULL) { + (void)fprintf(stderr, "%s: %s\n", progname, strerror(errno)); + exit(1); + } + if (magic_load(magic, magicfile) == -1) { + (void)fprintf(stderr, "%s: %s\n", + progname, magic_error(magic)); + exit(1); + } +} + /* * unwrap -- read a file of filenames, do each one. */ -static void +private void unwrap(char *fn) { char buf[MAXPATHLEN]; @@ -311,12 +351,13 @@ unwrap(char *fn) wid = 1; } else { if ((f = fopen(fn, "r")) == NULL) { - error("Cannot open `%s' (%s).\n", fn, strerror(errno)); - /*NOTREACHED*/ + (void)fprintf(stderr, "%s: Cannot open `%s' (%s).\n", + progname, fn, strerror(errno)); + exit(1); } while (fgets(buf, MAXPATHLEN, f) != NULL) { - cwid = strlen(buf) - 1; + cwid = file_mbswidth(buf) - 1; if (cwid > wid) wid = cwid; } @@ -325,7 +366,7 @@ unwrap(char *fn) } while (fgets(buf, MAXPATHLEN, f) != NULL) { - buf[strlen(buf)-1] = '\0'; + buf[file_mbswidth(buf)-1] = '\0'; process(buf, wid); if(nobuffer) (void) fflush(stdout); @@ -334,6 +375,23 @@ unwrap(char *fn) (void) fclose(f); } +private void +process(const char *inname, int wid) +{ + const char *type; + int std_in = strcmp(inname, "-") == 0; + + if (wid > 0 && !bflag) + (void) printf("%s%s%*s ", std_in ? "/dev/stdin" : inname, + separator, (int) (nopad ? 0 : (wid - file_mbswidth(inname))), ""); + + type = magic_file(magic, std_in ? NULL : inname); + if (type == NULL) + printf("ERROR: %s\n", magic_error(magic)); + else + printf("%s\n", type); +} + #if 0 /* @@ -343,7 +401,7 @@ unwrap(char *fn) * same whether to perform byte swapping * big_endian whether we are a big endian host */ -static int +private int byteconv4(int from, int same, int big_endian) { if (same) @@ -370,7 +428,7 @@ byteconv4(int from, int same, int big_endian) * byteconv2 * Same as byteconv4, but for shorts */ -static short +private short byteconv2(int from, int same, int big_endian) { if (same) @@ -392,148 +450,44 @@ byteconv2(int from, int same, int big_endian) } #endif -/* - * process - process input file - */ -void -process(const char *inname, int wid) +size_t +file_mbswidth(const char *s) { - int fd = 0; - static const char stdname[] = "standard input"; - unsigned char buf[HOWMANY+1]; /* one extra for terminating '\0' */ - struct stat sb; - int nbytes = 0; /* number of bytes read from a datafile */ - char match = '\0'; - - if (strcmp("-", inname) == 0) { - if (fstat(0, &sb)<0) { - error("cannot fstat `%s' (%s).\n", stdname, - strerror(errno)); - /*NOTREACHED*/ - } - inname = stdname; - } - - if (wid > 0 && !bflag) - (void) printf("%s%c%*s", inname, separator, - (int) (nopad ? 0 : 1 + (wid - strlen(inname))), ""); - - if (inname != stdname) { - /* - * first try judging the file based on its filesystem status - */ - if (fsmagic(inname, &sb) != 0) { - putchar('\n'); - return; +#if defined(HAVE_WCHAR_H) && defined(HAVE_MBRTOWC) && defined(HAVE_WCWIDTH) + size_t bytesconsumed, old_n, n, width = 0; + mbstate_t state; + wchar_t nextchar; + (void)memset(&state, 0, sizeof(mbstate_t)); + old_n = n = strlen(s); + + while (n > 0) { + bytesconsumed = mbrtowc(&nextchar, s, n, &state); + if (bytesconsumed == (size_t)(-1) || + bytesconsumed == (size_t)(-2)) { + /* Something went wrong, return something reasonable */ + return old_n; } - - if ((fd = open(inname, O_RDONLY)) < 0) { - /* We can't open it, but we were able to stat it. */ - if (sb.st_mode & 0002) ckfputs("writable, ", stdout); - if (sb.st_mode & 0111) ckfputs("executable, ", stdout); - ckfprintf(stdout, "can't read `%s' (%s).\n", - inname, strerror(errno)); - return; - } - } - - - /* - * try looking at the first HOWMANY bytes - */ - if ((nbytes = read(fd, (char *)buf, HOWMANY)) == -1) { - error("read failed (%s).\n", strerror(errno)); - /*NOTREACHED*/ + if (s[0] == '\n') { + /* + * do what strlen() would do, so that caller + * is always right + */ + width++; + } else + width += wcwidth(nextchar); + + s += bytesconsumed, n -= bytesconsumed; } - - if (nbytes == 0) - ckfputs(iflag ? "application/x-empty" : "empty", stdout); - else { - buf[nbytes++] = '\0'; /* null-terminate it */ - match = tryit(inname, buf, nbytes, zflag); - } - -#ifdef BUILTIN_ELF - if (match == 's' && nbytes > 5) { - /* - * We matched something in the file, so this *might* - * be an ELF file, and the file is at least 5 bytes long, - * so if it's an ELF file it has at least one byte - * past the ELF magic number - try extracting information - * from the ELF headers that can't easily be extracted - * with rules in the magic file. - */ - tryelf(fd, buf, nbytes); - } -#endif - - if (inname != stdname) { -#ifdef RESTORE_TIME - /* - * Try to restore access, modification times if read it. - * This is really *bad* because it will modify the status - * time of the file... And of course this will affect - * backup programs - */ -# ifdef USE_UTIMES - struct timeval utsbuf[2]; - utsbuf[0].tv_sec = sb.st_atime; - utsbuf[1].tv_sec = sb.st_mtime; - - (void) utimes(inname, utsbuf); /* don't care if loses */ -# else - struct utimbuf utbuf; - - utbuf.actime = sb.st_atime; - utbuf.modtime = sb.st_mtime; - (void) utime(inname, &utbuf); /* don't care if loses */ -# endif -#endif - (void) close(fd); - } - (void) putchar('\n'); -} - - -int -tryit(const char *fn, unsigned char *buf, int nb, int zfl) -{ - - /* - * The main work is done here! - * We have the file name and/or the data buffer to be identified. - */ - -#ifdef __EMX__ - /* - * Ok, here's the right place to add a call to some os-specific - * routine, e.g. - */ - if (os2_apptype(fn, buf, nb) == 1) - return 'o'; + return width; +#else + return strlen(s); #endif - /* try compression stuff */ - if (zfl && zmagic(fn, buf, nb)) - return 'z'; - - /* try tests in /etc/magic (or surrogate magic file) */ - if (softmagic(buf, nb)) - return 's'; - - /* try known keywords, check whether it is ASCII */ - if (ascmagic(buf, nb)) - return 'a'; - - /* abandon hope, all ye who remain here */ - ckfputs(iflag ? "application/octet-stream" : "data", stdout); - return '\0'; } -static void +private void usage(void) { - (void)fprintf(stderr, USAGE, progname); - (void)fprintf(stderr, "Usage: %s -C [-m magic]\n", progname); + (void)fprintf(stderr, USAGE, progname, progname); #ifdef HAVE_GETOPT_LONG (void)fputs("Try `file --help' for more information.\n", stderr); #endif @@ -541,7 +495,7 @@ usage(void) } #ifdef HAVE_GETOPT_LONG -static void +private void help(void) { puts( @@ -556,10 +510,14 @@ help(void) " conjunction with -m to debug a new magic file\n" " before installing it\n" " -f, --files-from FILE read the filenames to be examined from FILE\n" +" -F, --separator string use string as separator instead of `:'\n" " -i, --mime output mime type strings\n" " -k, --keep-going don't stop at the first match\n" " -L, --dereference causes symlinks to be followed\n" " -n, --no-buffer do not buffer output\n" +" -N, --no-pad do not pad output\n" +" -p, --preserve-date preserve access times on files\n" +" -r, --raw don't translate unprintable chars to \\ooo\n" " -s, --special-files treat special (block/char devices) files as\n" " ordinary ones\n" " --help display this help and exit\n" |
