diff options
Diffstat (limited to 'Utilities/cmlibarchive/tar/bsdtar.c')
| -rw-r--r-- | Utilities/cmlibarchive/tar/bsdtar.c | 730 |
1 files changed, 0 insertions, 730 deletions
diff --git a/Utilities/cmlibarchive/tar/bsdtar.c b/Utilities/cmlibarchive/tar/bsdtar.c deleted file mode 100644 index 35f6bc6..0000000 --- a/Utilities/cmlibarchive/tar/bsdtar.c +++ /dev/null @@ -1,730 +0,0 @@ -/*- - * Copyright (c) 2003-2008 Tim Kientzle - * All rights reserved. - * - * 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, 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(S) ``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(S) 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. - */ - -#include "bsdtar_platform.h" -__FBSDID("$FreeBSD: src/usr.bin/tar/bsdtar.c,v 1.93 2008/11/08 04:43:24 kientzle Exp $"); - -#ifdef HAVE_SYS_PARAM_H -#include <sys/param.h> -#endif -#ifdef HAVE_SYS_STAT_H -#include <sys/stat.h> -#endif -#ifdef HAVE_ERRNO_H -#include <errno.h> -#endif -#ifdef HAVE_FCNTL_H -#include <fcntl.h> -#endif -#ifdef HAVE_LANGINFO_H -#include <langinfo.h> -#endif -#ifdef HAVE_LOCALE_H -#include <locale.h> -#endif -#ifdef HAVE_PATHS_H -#include <paths.h> -#endif -#ifdef HAVE_SIGNAL_H -#include <signal.h> -#endif -#include <stdio.h> -#ifdef HAVE_STDLIB_H -#include <stdlib.h> -#endif -#ifdef HAVE_STRING_H -#include <string.h> -#endif -#ifdef HAVE_TIME_H -#include <time.h> -#endif -#ifdef HAVE_UNISTD_H -#include <unistd.h> -#endif -#if HAVE_ZLIB_H -#include <cm_zlib.h> -#endif - -#include "bsdtar.h" -#include "err.h" - -/* - * Per POSIX.1-1988, tar defaults to reading/writing archives to/from - * the default tape device for the system. Pick something reasonable here. - */ -#ifdef __linux -#define _PATH_DEFTAPE "/dev/st0" -#endif -#if defined(_WIN32) && !defined(__CYGWIN__) -#define _PATH_DEFTAPE "\\\\.\\tape0" -#endif - -#ifndef _PATH_DEFTAPE -#define _PATH_DEFTAPE "/dev/tape" -#endif - -static struct bsdtar *_bsdtar; - -#if defined(SIGINFO) || defined(SIGUSR1) -static volatile int siginfo_occurred; - -static void -siginfo_handler(int sig) -{ - (void)sig; /* UNUSED */ - siginfo_occurred = 1; -} - -int -need_report(void) -{ - int r = siginfo_occurred; - siginfo_occurred = 0; - return (r); -} -#else -int -need_report(void) -{ - return (0); -} -#endif - -/* External function to parse a date/time string */ -time_t get_date(time_t, const char *); - -static void long_help(void); -static void only_mode(struct bsdtar *, const char *opt, - const char *valid); -static void set_mode(struct bsdtar *, char opt); -static void version(void); - -/* A basic set of security flags to request from libarchive. */ -#define SECURITY \ - (ARCHIVE_EXTRACT_SECURE_SYMLINKS \ - | ARCHIVE_EXTRACT_SECURE_NODOTDOT) - -int -main(int argc, char **argv) -{ - struct bsdtar *bsdtar, bsdtar_storage; - int opt, t; - char option_o; - char possible_help_request; - char buff[16]; - time_t now; - - /* - * Use a pointer for consistency, but stack-allocated storage - * for ease of cleanup. - */ - _bsdtar = bsdtar = &bsdtar_storage; - memset(bsdtar, 0, sizeof(*bsdtar)); - bsdtar->fd = -1; /* Mark as "unused" */ - option_o = 0; - -#if defined(SIGINFO) || defined(SIGUSR1) - { /* Catch SIGINFO and SIGUSR1, if they exist. */ - struct sigaction sa; - sa.sa_handler = siginfo_handler; - sigemptyset(&sa.sa_mask); - sa.sa_flags = 0; -#ifdef SIGINFO - if (sigaction(SIGINFO, &sa, NULL)) - lafe_errc(1, errno, "sigaction(SIGINFO) failed"); -#endif -#ifdef SIGUSR1 - /* ... and treat SIGUSR1 the same way as SIGINFO. */ - if (sigaction(SIGUSR1, &sa, NULL)) - lafe_errc(1, errno, "sigaction(SIGUSR1) failed"); -#endif - } -#endif - - - /* Need lafe_progname before calling lafe_warnc. */ - if (*argv == NULL) - lafe_progname = "bsdtar"; - else { -#if defined(_WIN32) && !defined(__CYGWIN__) - lafe_progname = strrchr(*argv, '\\'); -#else - lafe_progname = strrchr(*argv, '/'); -#endif - if (lafe_progname != NULL) - lafe_progname++; - else - lafe_progname = *argv; - } - - time(&now); - -#if HAVE_SETLOCALE - if (setlocale(LC_ALL, "") == NULL) - lafe_warnc(0, "Failed to set default locale"); -#endif -#if defined(HAVE_NL_LANGINFO) && defined(HAVE_D_MD_ORDER) - bsdtar->day_first = (*nl_langinfo(D_MD_ORDER) == 'd'); -#endif - possible_help_request = 0; - - /* Look up uid of current user for future reference */ - bsdtar->user_uid = geteuid(); - - /* Default: open tape drive. */ - bsdtar->filename = getenv("TAPE"); - if (bsdtar->filename == NULL) - bsdtar->filename = _PATH_DEFTAPE; - - /* Default: preserve mod time on extract */ - bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME; - - /* Default: Perform basic security checks. */ - bsdtar->extract_flags |= SECURITY; - -#ifndef _WIN32 - /* On POSIX systems, assume --same-owner and -p when run by - * the root user. This doesn't make any sense on Windows. */ - if (bsdtar->user_uid == 0) { - /* --same-owner */ - bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER; - /* -p */ - bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM; - bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; - bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; - bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; - } -#endif - - bsdtar->argv = argv; - bsdtar->argc = argc; - - /* - * Comments following each option indicate where that option - * originated: SUSv2, POSIX, GNU tar, star, etc. If there's - * no such comment, then I don't know of anyone else who - * implements that option. - */ - while ((opt = bsdtar_getopt(bsdtar)) != -1) { - switch (opt) { - case 'B': /* GNU tar */ - /* libarchive doesn't need this; just ignore it. */ - break; - case 'b': /* SUSv2 */ - t = atoi(bsdtar->optarg); - if (t <= 0 || t > 1024) - lafe_errc(1, 0, - "Argument to -b is out of range (1..1024)"); - bsdtar->bytes_per_block = 512 * t; - break; - case 'C': /* GNU tar */ - set_chdir(bsdtar, bsdtar->optarg); - break; - case 'c': /* SUSv2 */ - set_mode(bsdtar, opt); - break; - case OPTION_CHECK_LINKS: /* GNU tar */ - bsdtar->option_warn_links = 1; - break; - case OPTION_CHROOT: /* NetBSD */ - bsdtar->option_chroot = 1; - break; - case OPTION_EXCLUDE: /* GNU tar */ - if (lafe_exclude(&bsdtar->matching, bsdtar->optarg)) - lafe_errc(1, 0, - "Couldn't exclude %s\n", bsdtar->optarg); - break; - case OPTION_FORMAT: /* GNU tar, others */ - bsdtar->create_format = bsdtar->optarg; - break; - case OPTION_OPTIONS: - bsdtar->option_options = bsdtar->optarg; - break; - case 'f': /* SUSv2 */ - bsdtar->filename = bsdtar->optarg; - if (strcmp(bsdtar->filename, "-") == 0) - bsdtar->filename = NULL; - break; - case 'H': /* BSD convention */ - bsdtar->symlink_mode = 'H'; - break; - case 'h': /* Linux Standards Base, gtar; synonym for -L */ - bsdtar->symlink_mode = 'L'; - /* Hack: -h by itself is the "help" command. */ - possible_help_request = 1; - break; - case OPTION_HELP: /* GNU tar, others */ - long_help(); - exit(0); - break; - case 'I': /* GNU tar */ - /* - * TODO: Allow 'names' to come from an archive, - * not just a text file. Design a good UI for - * allowing names and mode/owner to be read - * from an archive, with contents coming from - * disk. This can be used to "refresh" an - * archive or to design archives with special - * permissions without having to create those - * permissions on disk. - */ - bsdtar->names_from_file = bsdtar->optarg; - break; - case OPTION_INCLUDE: - /* - * Noone else has the @archive extension, so - * noone else needs this to filter entries - * when transforming archives. - */ - if (lafe_include(&bsdtar->matching, bsdtar->optarg)) - lafe_errc(1, 0, - "Failed to add %s to inclusion list", - bsdtar->optarg); - break; - case 'j': /* GNU tar */ - if (bsdtar->create_compression != '\0') - lafe_errc(1, 0, - "Can't specify both -%c and -%c", opt, - bsdtar->create_compression); - bsdtar->create_compression = opt; - break; - case 'J': /* GNU tar 1.21 and later */ - if (bsdtar->create_compression != '\0') - lafe_errc(1, 0, - "Can't specify both -%c and -%c", opt, - bsdtar->create_compression); - bsdtar->create_compression = opt; - break; - case 'k': /* GNU tar */ - bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE; - break; - case OPTION_KEEP_NEWER_FILES: /* GNU tar */ - bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; - break; - case 'L': /* BSD convention */ - bsdtar->symlink_mode = 'L'; - break; - case 'l': /* SUSv2 and GNU tar beginning with 1.16 */ - /* GNU tar 1.13 used -l for --one-file-system */ - bsdtar->option_warn_links = 1; - break; - case OPTION_LZMA: - if (bsdtar->create_compression != '\0') - lafe_errc(1, 0, - "Can't specify both -%c and -%c", opt, - bsdtar->create_compression); - bsdtar->create_compression = opt; - break; - case 'm': /* SUSv2 */ - bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME; - break; - case 'n': /* GNU tar */ - bsdtar->option_no_subdirs = 1; - break; - /* - * Selecting files by time: - * --newer-?time='date' Only files newer than 'date' - * --newer-?time-than='file' Only files newer than time - * on specified file (useful for incremental backups) - * TODO: Add corresponding "older" options to reverse these. - */ - case OPTION_NEWER_CTIME: /* GNU tar */ - bsdtar->newer_ctime_sec = get_date(now, bsdtar->optarg); - break; - case OPTION_NEWER_CTIME_THAN: - { - struct stat st; - if (stat(bsdtar->optarg, &st) != 0) - lafe_errc(1, 0, - "Can't open file %s", bsdtar->optarg); - bsdtar->newer_ctime_sec = st.st_ctime; - bsdtar->newer_ctime_nsec = - ARCHIVE_STAT_CTIME_NANOS(&st); - } - break; - case OPTION_NEWER_MTIME: /* GNU tar */ - bsdtar->newer_mtime_sec = get_date(now, bsdtar->optarg); - break; - case OPTION_NEWER_MTIME_THAN: - { - struct stat st; - if (stat(bsdtar->optarg, &st) != 0) - lafe_errc(1, 0, - "Can't open file %s", bsdtar->optarg); - bsdtar->newer_mtime_sec = st.st_mtime; - bsdtar->newer_mtime_nsec = - ARCHIVE_STAT_MTIME_NANOS(&st); - } - break; - case OPTION_NODUMP: /* star */ - bsdtar->option_honor_nodump = 1; - break; - case OPTION_NO_SAME_OWNER: /* GNU tar */ - bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; - break; - case OPTION_NO_SAME_PERMISSIONS: /* GNU tar */ - bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_PERM; - bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL; - bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR; - bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS; - break; - case OPTION_NULL: /* GNU tar */ - bsdtar->option_null++; - break; - case OPTION_NUMERIC_OWNER: /* GNU tar */ - bsdtar->option_numeric_owner++; - break; - case 'O': /* GNU tar */ - bsdtar->option_stdout = 1; - break; - case 'o': /* SUSv2 and GNU conflict here, but not fatally */ - option_o = 1; /* Record it and resolve it later. */ - break; - case OPTION_ONE_FILE_SYSTEM: /* GNU tar */ - bsdtar->option_dont_traverse_mounts = 1; - break; -#if 0 - /* - * The common BSD -P option is not necessary, since - * our default is to archive symlinks, not follow - * them. This is convenient, as -P conflicts with GNU - * tar anyway. - */ - case 'P': /* BSD convention */ - /* Default behavior, no option necessary. */ - break; -#endif - case 'P': /* GNU tar */ - bsdtar->extract_flags &= ~SECURITY; - bsdtar->option_absolute_paths = 1; - break; - case 'p': /* GNU tar, star */ - bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM; - bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; - bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; - bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; - break; - case OPTION_POSIX: /* GNU tar */ - bsdtar->create_format = "pax"; - break; - case 'q': /* FreeBSD GNU tar --fast-read, NetBSD -q */ - bsdtar->option_fast_read = 1; - break; - case 'r': /* SUSv2 */ - set_mode(bsdtar, opt); - break; - case 'S': /* NetBSD pax-as-tar */ - bsdtar->extract_flags |= ARCHIVE_EXTRACT_SPARSE; - break; - case 's': /* NetBSD pax-as-tar */ -#if HAVE_REGEX_H - add_substitution(bsdtar, bsdtar->optarg); -#else - lafe_warnc(0, - "-s is not supported by this version of bsdtar"); - usage(); -#endif - break; - case OPTION_SAME_OWNER: /* GNU tar */ - bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER; - break; - case OPTION_STRIP_COMPONENTS: /* GNU tar 1.15 */ - bsdtar->strip_components = atoi(bsdtar->optarg); - break; - case 'T': /* GNU tar */ - bsdtar->names_from_file = bsdtar->optarg; - break; - case 't': /* SUSv2 */ - set_mode(bsdtar, opt); - bsdtar->verbose++; - break; - case OPTION_TOTALS: /* GNU tar */ - bsdtar->option_totals++; - break; - case 'U': /* GNU tar */ - bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK; - bsdtar->option_unlink_first = 1; - break; - case 'u': /* SUSv2 */ - set_mode(bsdtar, opt); - break; - case 'v': /* SUSv2 */ - bsdtar->verbose++; - break; - case OPTION_VERSION: /* GNU convention */ - version(); - break; -#if 0 - /* - * The -W longopt feature is handled inside of - * bsdtar_getopt(), so -W is not available here. - */ - case 'W': /* Obscure GNU convention. */ - break; -#endif - case 'w': /* SUSv2 */ - bsdtar->option_interactive = 1; - break; - case 'X': /* GNU tar */ - if (lafe_exclude_from_file(&bsdtar->matching, bsdtar->optarg)) - lafe_errc(1, 0, - "failed to process exclusions from file %s", - bsdtar->optarg); - break; - case 'x': /* SUSv2 */ - set_mode(bsdtar, opt); - break; - case 'y': /* FreeBSD version of GNU tar */ - if (bsdtar->create_compression != '\0') - lafe_errc(1, 0, - "Can't specify both -%c and -%c", opt, - bsdtar->create_compression); - bsdtar->create_compression = opt; - break; - case 'Z': /* GNU tar */ - if (bsdtar->create_compression != '\0') - lafe_errc(1, 0, - "Can't specify both -%c and -%c", opt, - bsdtar->create_compression); - bsdtar->create_compression = opt; - break; - case 'z': /* GNU tar, star, many others */ - if (bsdtar->create_compression != '\0') - lafe_errc(1, 0, - "Can't specify both -%c and -%c", opt, - bsdtar->create_compression); - bsdtar->create_compression = opt; - break; - case OPTION_USE_COMPRESS_PROGRAM: - bsdtar->compress_program = bsdtar->optarg; - break; - default: - usage(); - } - } - - /* - * Sanity-check options. - */ - - /* If no "real" mode was specified, treat -h as --help. */ - if ((bsdtar->mode == '\0') && possible_help_request) { - long_help(); - exit(0); - } - - /* Otherwise, a mode is required. */ - if (bsdtar->mode == '\0') - lafe_errc(1, 0, - "Must specify one of -c, -r, -t, -u, -x"); - - /* Check boolean options only permitted in certain modes. */ - if (bsdtar->option_dont_traverse_mounts) - only_mode(bsdtar, "--one-file-system", "cru"); - if (bsdtar->option_fast_read) - only_mode(bsdtar, "--fast-read", "xt"); - if (bsdtar->option_honor_nodump) - only_mode(bsdtar, "--nodump", "cru"); - if (option_o > 0) { - switch (bsdtar->mode) { - case 'c': - /* - * In GNU tar, -o means "old format." The - * "ustar" format is the closest thing - * supported by libarchive. - */ - bsdtar->create_format = "ustar"; - /* TODO: bsdtar->create_format = "v7"; */ - break; - case 'x': - /* POSIX-compatible behavior. */ - bsdtar->option_no_owner = 1; - bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; - break; - default: - only_mode(bsdtar, "-o", "xc"); - break; - } - } - if (bsdtar->option_no_subdirs) - only_mode(bsdtar, "-n", "cru"); - if (bsdtar->option_stdout) - only_mode(bsdtar, "-O", "xt"); - if (bsdtar->option_unlink_first) - only_mode(bsdtar, "-U", "x"); - if (bsdtar->option_warn_links) - only_mode(bsdtar, "--check-links", "cr"); - - /* Check other parameters only permitted in certain modes. */ - if (bsdtar->create_compression != '\0') { - strcpy(buff, "-?"); - buff[1] = bsdtar->create_compression; - only_mode(bsdtar, buff, "cxt"); - } - if (bsdtar->create_format != NULL) - only_mode(bsdtar, "--format", "cru"); - if (bsdtar->symlink_mode != '\0') { - strcpy(buff, "-?"); - buff[1] = bsdtar->symlink_mode; - only_mode(bsdtar, buff, "cru"); - } - if (bsdtar->strip_components != 0) - only_mode(bsdtar, "--strip-components", "xt"); - - switch(bsdtar->mode) { - case 'c': - tar_mode_c(bsdtar); - break; - case 'r': - tar_mode_r(bsdtar); - break; - case 't': - tar_mode_t(bsdtar); - break; - case 'u': - tar_mode_u(bsdtar); - break; - case 'x': - tar_mode_x(bsdtar); - break; - } - - lafe_cleanup_exclusions(&bsdtar->matching); -#if HAVE_REGEX_H - cleanup_substitution(bsdtar); -#endif - - if (bsdtar->return_value != 0) - lafe_warnc(0, - "Error exit delayed from previous errors."); - return (bsdtar->return_value); -} - -static void -set_mode(struct bsdtar *bsdtar, char opt) -{ - if (bsdtar->mode != '\0' && bsdtar->mode != opt) - lafe_errc(1, 0, - "Can't specify both -%c and -%c", opt, bsdtar->mode); - bsdtar->mode = opt; -} - -/* - * Verify that the mode is correct. - */ -static void -only_mode(struct bsdtar *bsdtar, const char *opt, const char *valid_modes) -{ - if (strchr(valid_modes, bsdtar->mode) == NULL) - lafe_errc(1, 0, - "Option %s is not permitted in mode -%c", - opt, bsdtar->mode); -} - - -void -usage(void) -{ - const char *p; - - p = lafe_progname; - - fprintf(stderr, "Usage:\n"); - fprintf(stderr, " List: %s -tf <archive-filename>\n", p); - fprintf(stderr, " Extract: %s -xf <archive-filename>\n", p); - fprintf(stderr, " Create: %s -cf <archive-filename> [filenames...]\n", p); - fprintf(stderr, " Help: %s --help\n", p); - exit(1); -} - -static void -version(void) -{ - printf("bsdtar %s - %s\n", - BSDTAR_VERSION_STRING, - archive_version()); - exit(0); -} - -static const char *long_help_msg = - "First option must be a mode specifier:\n" - " -c Create -r Add/Replace -t List -u Update -x Extract\n" - "Common Options:\n" - " -b # Use # 512-byte records per I/O block\n" - " -f <filename> Location of archive (default " _PATH_DEFTAPE ")\n" - " -v Verbose\n" - " -w Interactive\n" - "Create: %p -c [options] [<file> | <dir> | @<archive> | -C <dir> ]\n" - " <file>, <dir> add these items to archive\n" - " -z, -j, -J, --lzma Compress archive with gzip/bzip2/xz/lzma\n" - " --format {ustar|pax|cpio|shar} Select archive format\n" - " --exclude <pattern> Skip files that match pattern\n" - " -C <dir> Change to <dir> before processing remaining files\n" - " @<archive> Add entries from <archive> to output\n" - "List: %p -t [options] [<patterns>]\n" - " <patterns> If specified, list only entries that match\n" - "Extract: %p -x [options] [<patterns>]\n" - " <patterns> If specified, extract only entries that match\n" - " -k Keep (don't overwrite) existing files\n" - " -m Don't restore modification times\n" - " -O Write entries to stdout, don't restore to disk\n" - " -p Restore permissions (including ACLs, owner, file flags)\n"; - - -/* - * Note that the word 'bsdtar' will always appear in the first line - * of output. - * - * In particular, /bin/sh scripts that need to test for the presence - * of bsdtar can use the following template: - * - * if (tar --help 2>&1 | grep bsdtar >/dev/null 2>&1 ) then \ - * echo bsdtar; else echo not bsdtar; fi - */ -static void -long_help(void) -{ - const char *prog; - const char *p; - - prog = lafe_progname; - - fflush(stderr); - - p = (strcmp(prog,"bsdtar") != 0) ? "(bsdtar)" : ""; - printf("%s%s: manipulate archive files\n", prog, p); - - for (p = long_help_msg; *p != '\0'; p++) { - if (*p == '%') { - if (p[1] == 'p') { - fputs(prog, stdout); - p++; - } else - putchar('%'); - } else - putchar(*p); - } - version(); -} |