| Current Path : /usr/src/contrib/file/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/contrib/file/file.c |
/*
* 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.
*
* 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.
*/
#include "file.h"
#ifndef lint
FILE_RCSID("@(#)$File: file.c,v 1.145 2011/12/08 12:12:46 rrt Exp $")
#endif /* lint */
#include "magic.h"
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#ifdef RESTORE_TIME
# if (__COHERENT__ >= 0x420)
# include <sys/utime.h>
# else
# ifdef USE_UTIMES
# include <sys/time.h>
# else
# include <utime.h>
# endif
# endif
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h> /* for read() */
#endif
#ifdef HAVE_LOCALE_H
#include <locale.h>
#endif
#ifdef HAVE_WCHAR_H
#include <wchar.h>
#endif
#if defined(HAVE_GETOPT_H) && defined(HAVE_STRUCT_OPTION)
#include <getopt.h>
#ifndef HAVE_GETOPT_LONG
int getopt_long(int argc, char * const *argv, const char *optstring, const struct option *longopts, int *longindex);
#endif
#else
#include "mygetopt.h"
#endif
#ifdef S_IFLNK
#define FILE_FLAGS "-bchikLlNnprsvz0"
#else
#define FILE_FLAGS "-bciklNnprsvz0"
#endif
# define USAGE \
"Usage: %s [" FILE_FLAGS \
"] [--apple] [--mime-encoding] [--mime-type]\n" \
" [-e testname] [-F separator] [-f namefile] [-m magicfiles] " \
"file ...\n" \
" %s -C [-m magicfiles]\n" \
" %s [--help]\n"
private int /* Global command-line options */
bflag = 0, /* brief output format */
nopad = 0, /* Don't pad output */
nobuffer = 0, /* Do not buffer stdout */
nulsep = 0; /* Append '\0' to the separator */
private const char *separator = ":"; /* Default field separator */
private const struct option long_options[] = {
#define OPT(shortname, longname, opt, doc) \
{longname, opt, NULL, shortname},
#define OPT_LONGONLY(longname, opt, doc) \
{longname, opt, NULL, 0},
#include "file_opts.h"
#undef OPT
#undef OPT_LONGONLY
{0, 0, NULL, 0}
};
#define OPTSTRING "bcCde:f:F:hiklLm:nNprsvz0"
private const struct {
const char *name;
int value;
} nv[] = {
{ "apptype", MAGIC_NO_CHECK_APPTYPE },
{ "ascii", MAGIC_NO_CHECK_ASCII },
{ "cdf", MAGIC_NO_CHECK_CDF },
{ "compress", MAGIC_NO_CHECK_COMPRESS },
{ "elf", MAGIC_NO_CHECK_ELF },
{ "encoding", MAGIC_NO_CHECK_ENCODING },
{ "soft", MAGIC_NO_CHECK_SOFT },
{ "tar", MAGIC_NO_CHECK_TAR },
{ "text", MAGIC_NO_CHECK_TEXT }, /* synonym for ascii */
{ "tokens", MAGIC_NO_CHECK_TOKENS }, /* OBSOLETE: ignored for backwards compatibility */
};
private char *progname; /* used throughout */
private void usage(void);
private void help(void);
int main(int, char *[]);
private int unwrap(struct magic_set *, const char *);
private int process(struct magic_set *ms, const char *, int);
private struct magic_set *load(const char *, int);
/*
* main - parse arguments and handle options
*/
int
main(int argc, char *argv[])
{
int c;
size_t i;
int action = 0, didsomefiles = 0, errflg = 0;
int flags = 0, e = 0;
struct magic_set *magic = NULL;
int longindex;
const char *magicfile = NULL; /* where the magic is */
/* makes islower etc work for other langs */
(void)setlocale(LC_CTYPE, "");
#ifdef __EMX__
/* sh-like wildcard expansion! Shouldn't hurt at least ... */
_wildcard(&argc, &argv);
#endif
if ((progname = strrchr(argv[0], '/')) != NULL)
progname++;
else
progname = argv[0];
#ifdef S_IFLNK
flags |= getenv("POSIXLY_CORRECT") ? MAGIC_SYMLINK : 0;
#endif
while ((c = getopt_long(argc, argv, OPTSTRING, long_options,
&longindex)) != -1)
switch (c) {
case 0 :
switch (longindex) {
case 0:
help();
break;
case 10:
flags |= MAGIC_APPLE;
break;
case 11:
flags |= MAGIC_MIME_TYPE;
break;
case 12:
flags |= MAGIC_MIME_ENCODING;
break;
}
break;
case '0':
nulsep = 1;
break;
case 'b':
bflag++;
break;
case 'c':
action = FILE_CHECK;
break;
case 'C':
action = FILE_COMPILE;
break;
case 'd':
flags |= MAGIC_DEBUG|MAGIC_CHECK;
break;
case 'e':
for (i = 0; i < sizeof(nv) / sizeof(nv[0]); i++)
if (strcmp(nv[i].name, optarg) == 0)
break;
if (i == sizeof(nv) / sizeof(nv[0]))
errflg++;
else
flags |= nv[i].value;
break;
case 'f':
if(action)
usage();
if (magic == NULL)
if ((magic = load(magicfile, flags)) == NULL)
return 1;
e |= unwrap(magic, optarg);
++didsomefiles;
break;
case 'F':
separator = optarg;
break;
case 'i':
flags |= MAGIC_MIME;
break;
case 'k':
flags |= MAGIC_CONTINUE;
break;
case 'l':
action = FILE_LIST;
break;
case 'm':
magicfile = optarg;
break;
case 'n':
++nobuffer;
break;
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':
flags |= MAGIC_DEVICES;
break;
case 'v':
if (magicfile == NULL)
magicfile = magic_getpath(magicfile, action);
(void)fprintf(stdout, "%s-%s\n", progname, VERSION);
(void)fprintf(stdout, "magic file from %s\n",
magicfile);
return 1;
case 'z':
flags |= MAGIC_COMPRESS;
break;
#ifdef S_IFLNK
case 'L':
flags |= MAGIC_SYMLINK;
break;
case 'h':
flags &= ~MAGIC_SYMLINK;
break;
#endif
case '?':
default:
errflg++;
break;
}
if (errflg) {
usage();
}
if (e)
return e;
switch(action) {
case FILE_CHECK:
case FILE_COMPILE:
case FILE_LIST:
/*
* Don't try to check/compile ~/.magic unless we explicitly
* ask for it.
*/
magic = magic_open(flags|MAGIC_CHECK);
if (magic == NULL) {
(void)fprintf(stderr, "%s: %s\n", progname,
strerror(errno));
return 1;
}
switch(action) {
case FILE_CHECK:
c = magic_check(magic, magicfile);
break;
case FILE_COMPILE:
c = magic_compile(magic, magicfile);
break;
case FILE_LIST:
c = magic_list(magic, magicfile);
break;
default:
abort();
}
if (c == -1) {
(void)fprintf(stderr, "%s: %s\n", progname,
magic_error(magic));
return 1;
}
return 0;
default:
if (magic == NULL)
if ((magic = load(magicfile, flags)) == NULL)
return 1;
break;
}
if (optind == argc) {
if (!didsomefiles)
usage();
}
else {
size_t j, wid, nw;
for (wid = 0, j = (size_t)optind; j < (size_t)argc; j++) {
nw = file_mbswidth(argv[j]);
if (nw > wid)
wid = nw;
}
/*
* If bflag is only set twice, set it depending on
* number of files [this is undocumented, and subject to change]
*/
if (bflag == 2) {
bflag = optind >= argc - 1;
}
for (; optind < argc; optind++)
e |= process(magic, argv[optind], wid);
}
if (magic)
magic_close(magic);
return e;
}
private struct magic_set *
/*ARGSUSED*/
load(const char *magicfile, int flags)
{
struct magic_set *magic = magic_open(flags);
if (magic == NULL) {
(void)fprintf(stderr, "%s: %s\n", progname, strerror(errno));
return NULL;
}
if (magic_load(magic, magicfile) == -1) {
(void)fprintf(stderr, "%s: %s\n",
progname, magic_error(magic));
magic_close(magic);
return NULL;
}
return magic;
}
/*
* unwrap -- read a file of filenames, do each one.
*/
private int
unwrap(struct magic_set *ms, const char *fn)
{
FILE *f;
ssize_t len;
char *line = NULL;
size_t llen = 0;
int wid = 0, cwid;
int e = 0;
if (strcmp("-", fn) == 0) {
f = stdin;
wid = 1;
} else {
if ((f = fopen(fn, "r")) == NULL) {
(void)fprintf(stderr, "%s: Cannot open `%s' (%s).\n",
progname, fn, strerror(errno));
return 1;
}
while ((len = getline(&line, &llen, f)) > 0) {
if (line[len - 1] == '\n')
line[len - 1] = '\0';
cwid = file_mbswidth(line);
if (cwid > wid)
wid = cwid;
}
rewind(f);
}
while ((len = getline(&line, &llen, f)) > 0) {
if (line[len - 1] == '\n')
line[len - 1] = '\0';
e |= process(ms, line, wid);
if(nobuffer)
(void)fflush(stdout);
}
free(line);
(void)fclose(f);
return e;
}
/*
* Called for each input file on the command line (or in a list of files)
*/
private int
process(struct magic_set *ms, const char *inname, int wid)
{
const char *type;
int std_in = strcmp(inname, "-") == 0;
if (wid > 0 && !bflag) {
(void)printf("%s", std_in ? "/dev/stdin" : inname);
if (nulsep)
(void)putc('\0', stdout);
(void)printf("%s", separator);
(void)printf("%*s ",
(int) (nopad ? 0 : (wid - file_mbswidth(inname))), "");
}
type = magic_file(ms, std_in ? NULL : inname);
if (type == NULL) {
(void)printf("ERROR: %s\n", magic_error(ms));
return 1;
} else {
(void)printf("%s\n", type);
return 0;
}
}
size_t
file_mbswidth(const char *s)
{
#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 (s[0] == '\n') {
/*
* do what strlen() would do, so that caller
* is always right
*/
width++;
} else
width += wcwidth(nextchar);
s += bytesconsumed, n -= bytesconsumed;
}
return width;
#else
return strlen(s);
#endif
}
private void
usage(void)
{
(void)fprintf(stderr, USAGE, progname, progname, progname);
exit(1);
}
private void
help(void)
{
(void)fputs(
"Usage: file [OPTION...] [FILE...]\n"
"Determine type of FILEs.\n"
"\n", stdout);
#define OPT(shortname, longname, opt, doc) \
fprintf(stdout, " -%c, --" longname doc, shortname);
#define OPT_LONGONLY(longname, opt, doc) \
fprintf(stdout, " --" longname doc);
#include "file_opts.h"
#undef OPT
#undef OPT_LONGONLY
fprintf(stdout, "\nReport bugs to http://bugs.gw.com/\n");
exit(0);
}