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Diffstat (limited to 'archivers/libarchive/files/cpio/cmdline.c')
| -rw-r--r-- | archivers/libarchive/files/cpio/cmdline.c | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/archivers/libarchive/files/cpio/cmdline.c b/archivers/libarchive/files/cpio/cmdline.c new file mode 100644 index 00000000000..6c92b5dcd60 --- /dev/null +++ b/archivers/libarchive/files/cpio/cmdline.c @@ -0,0 +1,245 @@ +/*- + * Copyright (c) 2003-2007 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 + * in this position and unchanged. + * 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 "cpio_platform.h" +__FBSDID("$FreeBSD$"); + +#ifdef HAVE_ERRNO_H +#include <errno.h> +#endif +#ifdef HAVE_GETOPT_LONG +#include <getopt.h> +#else +struct option { + const char *name; + int has_arg; + int *flag; + int val; +}; +#define no_argument 0 +#define required_argument 1 +#endif +#ifdef HAVE_GRP_H +#include <grp.h> +#endif +#ifdef HAVE_PWD_H +#include <pwd.h> +#endif +#include <stdio.h> +#ifdef HAVE_STDLIB_H +#include <stdlib.h> +#endif +#ifdef HAVE_STRING_H +#include <string.h> +#endif + +#include "cpio.h" + +/* + * + * Option parsing routines for bsdcpio. + * + */ + + +static const char *cpio_opts = "aBcdf:H:hijlmopR:rtuvW:yz"; + +/* + * On systems that lack getopt_long, long options can be specified + * using -W longopt and -W longopt=value, e.g. "-W version" is the + * same as "--version" and "-W format=ustar" is the same as "--format + * ustar". This does not rely the GNU getopt() "W;" extension, so + * should work correctly on any system with a POSIX-compliant + * getopt(). + */ + +/* + * If you add anything, be very careful to keep this list properly + * sorted, as the -W logic below relies on it. + */ +static const struct option cpio_longopts[] = { + { "format", required_argument, NULL, 'H' }, + { "help", no_argument, NULL, 'h' }, + { "owner", required_argument, NULL, 'R' }, + { "quiet", no_argument, NULL, OPTION_QUIET }, + { "verbose", no_argument, NULL, 'v' }, + { "version", no_argument, NULL, OPTION_VERSION }, + { NULL, 0, NULL, 0 } +}; + +/* + * Parse command-line options using system-provided getopt() or getopt_long(). + * If option is -W, then parse argument as a long option. + */ +int +cpio_getopt(struct cpio *cpio) +{ + char *p, *q; + const struct option *option, *option2; + int opt; + int option_index; + size_t option_length; + + option_index = -1; + +#ifdef HAVE_GETOPT_LONG + opt = getopt_long(cpio->argc, cpio->argv, cpio_opts, + cpio_longopts, &option_index); +#else + opt = getopt(cpio->argc, cpio->argv, optstring); +#endif + + /* Support long options through -W longopt=value */ + if (opt == 'W') { + p = optarg; + q = strchr(optarg, '='); + if (q != NULL) { + option_length = (size_t)(q - p); + optarg = q + 1; + } else { + option_length = strlen(p); + optarg = NULL; + } + option = cpio_longopts; + while (option->name != NULL && + (strlen(option->name) < option_length || + strncmp(p, option->name, option_length) != 0 )) { + option++; + } + + if (option->name != NULL) { + option2 = option; + opt = option->val; + + /* If the first match was exact, we're done. */ + if (strncmp(p, option->name, strlen(option->name)) == 0) { + while (option->name != NULL) + option++; + } else { + /* Check if there's another match. */ + option++; + while (option->name != NULL && + (strlen(option->name) < option_length || + strncmp(p, option->name, option_length) != 0)) { + option++; + } + } + if (option->name != NULL) + cpio_errc(1, 0, + "Ambiguous option %s " + "(matches both %s and %s)", + p, option2->name, option->name); + + if (option2->has_arg == required_argument + && optarg == NULL) + cpio_errc(1, 0, + "Option \"%s\" requires argument", p); + } else { + opt = '?'; + } + } + + return (opt); +} + + +/* + * Parse the argument to the -R or --owner flag. + * + * The format is one of the following: + * <user> - Override user but not group + * <user>: - Override both, group is user's default group + * <user>:<group> - Override both + * :<group> - Override group but not user + * + * A period can be used instead of the colon. + * + * Sets uid/gid as appropriate, -1 indicates uid/gid not specified. + * + */ +int +owner_parse(const char *spec, int *uid, int *gid) +{ + const char *u, *ue, *g; + + *uid = -1; + *gid = -1; + + /* + * Split spec into [user][:.][group] + * u -> first char of username, NULL if no username + * ue -> first char after username (colon, period, or \0) + * g -> first char of group name + */ + if (*spec == ':' || *spec == '.') { + /* If spec starts with ':' or '.', then just group. */ + ue = u = NULL; + g = spec + 1; + } else { + /* Otherwise, [user] or [user][:] or [user][:][group] */ + ue = u = spec; + while (*ue != ':' && *ue != '.' && *ue != '\0') + ++ue; + g = ue; + if (*g != '\0') /* Skip : or . to find first char of group. */ + ++g; + } + + if (u != NULL) { + /* Look up user: ue is first char after end of user. */ + char *user; + struct passwd *pwent; + + user = (char *)malloc(ue - u + 1); + if (user == NULL) { + cpio_warnc(errno, "Couldn't allocate memory"); + return (1); + } + memcpy(user, u, ue - u); + user[ue - u] = '\0'; + pwent = getpwnam(user); + if (pwent == NULL) { + cpio_warnc(errno, "Couldn't lookup user ``%s''", user); + return (1); + } + free(user); + *uid = pwent->pw_uid; + if (*ue != '\0' && *g == '\0') + *gid = pwent->pw_gid; + } + if (*g != '\0') { + struct group *grp; + grp = getgrnam(g); + if (grp != NULL) + *gid = grp->gr_gid; + else { + cpio_warnc(errno, "Couldn't look up group ``%s''", g); + return (1); + } + } + return (0); +} |