diff options
author | Ted Unangst <tedu@cvs.openbsd.org> | 2004-05-19 02:32:37 +0000 |
---|---|---|
committer | Ted Unangst <tedu@cvs.openbsd.org> | 2004-05-19 02:32:37 +0000 |
commit | 05cabd309934408959a36a9feb018f1bf1e897ee (patch) | |
tree | a528b45949c0f3f8e8f232f70213ce635a357a5d /usr.bin/file/file.c | |
parent | 2243525ab32c3771528c08a31aa8d25645ee7abc (diff) |
big update to file 4.09. ok ian@
Diffstat (limited to 'usr.bin/file/file.c')
-rw-r--r-- | usr.bin/file/file.c | 584 |
1 files changed, 355 insertions, 229 deletions
diff --git a/usr.bin/file/file.c b/usr.bin/file/file.c index a51952350bf..588b72c06b6 100644 --- a/usr.bin/file/file.c +++ b/usr.bin/file/file.c @@ -1,8 +1,5 @@ -/* $OpenBSD: file.c,v 1.13 2003/07/02 21:04:09 deraadt Exp $ */ - +/* $OpenBSD: file.c,v 1.14 2004/05/19 02:32:35 tedu Exp $ */ /* - * file - find type of a file or files - main program. - * * Copyright (c) Ian F. Darwin 1986-1995. * Software written by Ian F. Darwin and others; * maintained 1995-present by Christos Zoulas and others. @@ -29,67 +26,97 @@ * 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. + */ -#ifndef lint -static char *moduleid = "$OpenBSD: file.c,v 1.13 2003/07/02 21:04:09 deraadt Exp $"; -#endif /* lint */ +#include "file.h" +#include "magic.h" #include <stdio.h> #include <stdlib.h> +#include <unistd.h> #include <string.h> #include <sys/types.h> #include <sys/param.h> /* for MAXPATHLEN */ #include <sys/stat.h> #include <fcntl.h> /* for open() */ -#if (__COHERENT__ >= 0x420) -# include <sys/utime.h> -#else -# ifdef USE_UTIMES -# include <sys/time.h> +#ifdef RESTORE_TIME +# if (__COHERENT__ >= 0x420) +# include <sys/utime.h> # else -# include <utime.h> +# ifdef USE_UTIMES +# include <sys/time.h> +# else +# include <utime.h> +# endif # endif #endif +#ifdef HAVE_UNISTD_H #include <unistd.h> /* for read() */ -#include <err.h> +#endif +#ifdef HAVE_LOCALE_H +#include <locale.h> +#endif +#ifdef HAVE_WCHAR_H +#include <wchar.h> +#endif + +#ifdef HAVE_GETOPT_H +#include <getopt.h> /* for long options (is this portable?)*/ +#else +#undef HAVE_GETOPT_LONG +#endif #include <netinet/in.h> /* for byte swapping */ #include "patchlevel.h" -#include "file.h" + +#ifndef lint +FILE_RCSID("@(#)$Id: file.c,v 1.14 2004/05/19 02:32:35 tedu Exp $") +#endif /* lint */ + #ifdef S_IFLNK -# define USAGE "Usage: %s [-vbczL] [-f namefile] [-m magicfiles] file...\n" +#define SYMLINKFLAG "L" #else -# define USAGE "Usage: %s [-vbcz] [-f namefile] [-m magicfiles] file...\n" +#define SYMLINKFLAG "" #endif -#ifndef MAGIC -# define MAGIC "/etc/magic" -#endif - -int /* Global command-line options */ - debug = 0, /* debugging */ - bflag = 0, /* Don't print filename */ - lflag = 0, /* follow Symlinks (BSD only) */ - zflag = 0; /* follow (uncompress) compressed files */ +# define USAGE "Usage: %s [-bcik" SYMLINKFLAG "nNsvz] [-f namefile] [-F separator] [-m magicfiles] file...\n %s -C -m magicfiles\n" -int /* Misc globals */ - nmagic = 0; /* number of valid magic[]s */ +#ifndef MAXPATHLEN +#define MAXPATHLEN 512 +#endif -struct magic *magic; /* array of magic entries */ +private int /* Global command-line options */ + bflag = 0, /* brief output format */ + nopad = 0, /* Don't pad output */ + nobuffer = 0; /* Do not buffer stdout */ -char *magicfile; /* where magic be found */ +private const char *magicfile = 0; /* where the magic is */ +private const char *default_magicfile = MAGIC; +private char *separator = ":"; /* Default field separator */ -int lineno; /* line number in the magic file */ +private char *progname; /* used throughout */ +private struct magic_set *magic; -static void unwrap(char *fn); +private void unwrap(char *); +private void usage(void); +#ifdef HAVE_GETOPT_LONG +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 */ @@ -97,48 +124,146 @@ int main(int argc, char *argv[]) { int c; - int check = 0, didsomefiles = 0, errflg = 0, ret = 0, app = 0; - extern char *__progname; + int action = 0, didsomefiles = 0, errflg = 0; + int flags = 0; + char *home, *usermagic; + struct stat sb; +#define OPTSTRING "bcCdf:F:ikLm:nNprsvz" +#ifdef HAVE_GETOPT_LONG + int longindex; + private struct option long_options[] = + { + {"version", 0, 0, 'v'}, + {"help", 0, 0, 0}, + {"brief", 0, 0, 'b'}, + {"checking-printout", 0, 0, 'c'}, + {"debug", 0, 0, 'd'}, + {"files-from", 1, 0, 'f'}, + {"separator", 1, 0, 'F'}, + {"mime", 0, 0, 'i'}, + {"keep-going", 0, 0, 'k'}, +#ifdef S_IFLNK + {"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'}, + {"compile", 0, 0, 'C'}, + {0, 0, 0, 0}, + }; +#endif + +#ifdef LC_CTYPE + setlocale(LC_CTYPE, ""); /* makes islower etc work for other langs */ +#endif + +#ifdef __EMX__ + /* sh-like wildcard expansion! Shouldn't hurt at least ... */ + _wildcard(&argc, &argv); +#endif - if (!(magicfile = getenv("MAGIC"))) - magicfile = MAGIC; + if ((progname = strrchr(argv[0], '/')) != NULL) + progname++; + else + progname = argv[0]; + + magicfile = default_magicfile; + if ((usermagic = getenv("MAGIC")) != NULL) + magicfile = usermagic; + else + if ((home = getenv("HOME")) != NULL) { + size_t len = strlen(home) + 8; + if ((usermagic = malloc(len)) != NULL) { + (void)strlcpy(usermagic, home, len); + (void)strlcat(usermagic, "/.magic", len); + if (stat(usermagic, &sb)<0) + free(usermagic); + else + magicfile = usermagic; + } + } - while ((c = getopt(argc, argv, "bvcdf:Lm:z")) != -1) +#ifndef HAVE_GETOPT_LONG + while ((c = getopt(argc, argv, OPTSTRING)) != -1) +#else + while ((c = getopt_long(argc, argv, OPTSTRING, long_options, + &longindex)) != -1) +#endif switch (c) { - case 'v': - (void) printf("%s-%d.%d\n", __progname, - FILE_VERSION_MAJOR, patchlevel); - return 1; +#ifdef HAVE_GETOPT_LONG + case 0 : + if (longindex == 1) + help(); + break; +#endif case 'b': ++bflag; break; case 'c': - ++check; + action = FILE_CHECK; + break; + case 'C': + action = FILE_COMPILE; break; case 'd': - ++debug; + flags |= MAGIC_DEBUG|MAGIC_CHECK; break; case 'f': - if (!app) { - ret = apprentice(magicfile, check); - if (check) - exit(ret); - app = 1; - } + if(action) + usage(); + load(magicfile, flags); unwrap(optarg); ++didsomefiles; break; -#ifdef S_IFLNK - case 'L': - ++lflag; + case 'F': + separator = optarg; + break; + case 'i': + flags |= MAGIC_MIME; + break; + case 'k': + flags |= MAGIC_CONTINUE; break; -#endif 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': + (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': + flags |= MAGIC_SYMLINK; break; +#endif case '?': default: errflg++; @@ -146,26 +271,40 @@ main(int argc, char *argv[]) } if (errflg) { - (void) fprintf(stderr, USAGE, __progname); - exit(2); + usage(); } - if (!app) { - ret = apprentice(magicfile, check); - if (check) - 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) { if (!didsomefiles) { - fprintf(stderr, USAGE, __progname); - exit(2); + usage(); } - } else { + } + 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; } @@ -177,12 +316,28 @@ 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 -unwrap(fn) -char *fn; +private void +unwrap(char *fn) { char buf[MAXPATHLEN]; FILE *f; @@ -193,12 +348,13 @@ char *fn; wid = 1; } else { if ((f = fopen(fn, "r")) == NULL) { - err(1, "Cannot open `%s'", fn); - /*NOTREACHED*/ + (void)fprintf(stderr, "%s: Cannot open `%s' (%s).\n", + progname, fn, strerror(errno)); + exit(1); } - while (fgets(buf, sizeof(buf), f) != NULL) { - cwid = strlen(buf) - 1; + while (fgets(buf, MAXPATHLEN, f) != NULL) { + cwid = file_mbswidth(buf) - 1; if (cwid > wid) wid = cwid; } @@ -206,14 +362,33 @@ char *fn; rewind(f); } - while (fgets(buf, sizeof(buf), f) != NULL) { - buf[strlen(buf)-1] = '\0'; + while (fgets(buf, MAXPATHLEN, f) != NULL) { + buf[file_mbswidth(buf)-1] = '\0'; process(buf, wid); + if(nobuffer) + (void) fflush(stdout); } (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 /* @@ -223,177 +398,128 @@ char *fn; * same whether to perform byte swapping * big_endian whether we are a big endian host */ -static int -byteconv4(from, same, big_endian) - int from; - int same; - int big_endian; +private int +byteconv4(int from, int same, int big_endian) { - if (same) - return from; - else if (big_endian) /* lsb -> msb conversion on msb */ - { - union { - int i; - char c[4]; - } retval, tmpval; - - tmpval.i = from; - retval.c[0] = tmpval.c[3]; - retval.c[1] = tmpval.c[2]; - retval.c[2] = tmpval.c[1]; - retval.c[3] = tmpval.c[0]; - - return retval.i; - } - else - return ntohl(from); /* msb -> lsb conversion on lsb */ + if (same) + return from; + else if (big_endian) { /* lsb -> msb conversion on msb */ + union { + int i; + char c[4]; + } retval, tmpval; + + tmpval.i = from; + retval.c[0] = tmpval.c[3]; + retval.c[1] = tmpval.c[2]; + retval.c[2] = tmpval.c[1]; + retval.c[3] = tmpval.c[0]; + + return retval.i; + } + else + return ntohl(from); /* msb -> lsb conversion on lsb */ } /* * byteconv2 * Same as byteconv4, but for shorts */ -static short -byteconv2(from, same, big_endian) - int from; - int same; - int big_endian; +private short +byteconv2(int from, int same, int big_endian) { - if (same) - return from; - else if (big_endian) /* lsb -> msb conversion on msb */ - { - union { - short s; - char c[2]; - } retval, tmpval; - - tmpval.s = (short) from; - retval.c[0] = tmpval.c[1]; - retval.c[1] = tmpval.c[0]; - - return retval.s; - } - else - return ntohs(from); /* msb -> lsb conversion on lsb */ + if (same) + return from; + else if (big_endian) { /* lsb -> msb conversion on msb */ + union { + short s; + char c[2]; + } retval, tmpval; + + tmpval.s = (short) from; + retval.c[0] = tmpval.c[1]; + retval.c[1] = tmpval.c[0]; + + return retval.s; + } + else + return ntohs(from); /* msb -> lsb conversion on lsb */ } #endif -/* - * process - process input file - */ -void -process(inname, wid) -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) { - err(1, "cannot fstat `%s'", stdname); - /*NOTREACHED*/ +#ifdef HAVE_WCHAR_H + 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; } - inname = stdname; - } - - if (wid > 0 && !bflag) - (void) printf("%s:%*s ", inname, - (int) (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 ((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) { - err(1, "read failed"); - /*NOTREACHED*/ - } - - if (nbytes == 0) - ckfputs("empty", stdout); - else { - buf[nbytes++] = '\0'; /* null-terminate it */ - match = tryit(buf, nbytes, zflag); + if (s[0] == '\n') { + /* + * do what strlen() would do, so that caller + * is always right + */ + width++; + } else + width += wcwidth(nextchar); + + s += bytesconsumed, n -= bytesconsumed; } - -#ifdef BUILTIN_ELF - if (match == 's' && nbytes > 5) - tryelf(fd, buf, nbytes); + return width; +#else + return strlen(s); #endif +} - if (inname != stdname) { -#ifdef RESTORE_TIME - /* - * Try to restore access, modification times if read it. - */ -# 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 +private void +usage(void) +{ + (void)fprintf(stderr, USAGE, progname, progname); +#ifdef HAVE_GETOPT_LONG + (void)fputs("Try `file --help' for more information.\n", stderr); #endif - (void) close(fd); - } - (void) putchar('\n'); + exit(1); } - -int -tryit(buf, nb, zflag) -unsigned char *buf; -int nb, zflag; +#ifdef HAVE_GETOPT_LONG +private void +help(void) { - /* try compression stuff */ - if (zflag && zmagic(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'; - - /* see if it's international language text */ - if (internatmagic(buf, nb)) - return 'i'; - - /* abandon hope, all ye who remain here */ - ckfputs("data", stdout); - return '\0'; + puts( +"Usage: file [OPTION]... [FILE]...\n" +"Determine file type of FILEs.\n" +"\n" +" -m, --magic-file LIST use LIST as a colon-separated list of magic\n" +" number files\n" +" -z, --uncompress try to look inside compressed files\n" +" -b, --brief do not prepend filenames to output lines\n" +" -c, --checking-printout print the parsed form of the magic file, use in\n" +" 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" +" --version output version information and exit\n" +); + exit(0); } +#endif |