diff options
Diffstat (limited to 'contrib/cpio/userspec.c')
| -rw-r--r-- | contrib/cpio/userspec.c | 277 |
1 files changed, 0 insertions, 277 deletions
diff --git a/contrib/cpio/userspec.c b/contrib/cpio/userspec.c deleted file mode 100644 index 67f1583335c5..000000000000 --- a/contrib/cpio/userspec.c +++ /dev/null @@ -1,277 +0,0 @@ -/* userspec.c -- Parse a user and group string. - Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ - -/* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#ifdef __GNUC__ -#define alloca __builtin_alloca -#else -#ifdef HAVE_ALLOCA_H -#include <alloca.h> -#else -#ifdef _AIX - #pragma alloca -#else -char *alloca (); -#endif -#endif -#endif - -#include <stdio.h> -#include <sys/types.h> -#include <pwd.h> -#include <grp.h> - -#if defined(STDC_HEADERS) || defined(HAVE_STRING_H) -#include <string.h> -#ifndef index -#define index strchr -#endif -#else -#include <strings.h> -#endif - -#ifdef STDC_HEADERS -#include <stdlib.h> -#endif - -#ifdef HAVE_UNISTD_H -#include <unistd.h> -#endif - -#ifndef _POSIX_VERSION -struct passwd *getpwnam (); -struct group *getgrnam (); -struct group *getgrgid (); -#endif - -#ifdef _POSIX_SOURCE -#define endpwent() -#define endgrent() -#endif - -/* Perform the equivalent of the statement `dest = strdup (src);', - but obtaining storage via alloca instead of from the heap. */ - -#define V_STRDUP(dest, src) \ - do \ - { \ - int _len = strlen ((src)); \ - (dest) = (char *) alloca (_len + 1); \ - strcpy (dest, src); \ - } \ - while (0) - -#define isdigit(c) ((c) >= '0' && (c) <= '9') - -char *strdup (); - -/* Return nonzero if STR represents an unsigned decimal integer, - otherwise return 0. */ - -static int -isnumber (str) - const char *str; -{ - for (; *str; str++) - if (!isdigit (*str)) - return 0; - return 1; -} - -/* Extract from NAME, which has the form "[user][:.][group]", - a USERNAME, UID U, GROUPNAME, and GID G. - Either user or group, or both, must be present. - If the group is omitted but the ":" or "." separator is given, - use the given user's login group. - - USERNAME and GROUPNAME will be in newly malloc'd memory. - Either one might be NULL instead, indicating that it was not - given and the corresponding numeric ID was left unchanged. - - Return NULL if successful, a static error message string if not. */ - -const char * -parse_user_spec (spec_arg, uid, gid, username_arg, groupname_arg) - const char *spec_arg; - uid_t *uid; - gid_t *gid; - char **username_arg, **groupname_arg; -{ - static const char *tired = "virtual memory exhausted"; - const char *error_msg; - char *spec; /* A copy we can write on. */ - struct passwd *pwd; - struct group *grp; - char *g, *u, *separator; - char *groupname; - - error_msg = NULL; - *username_arg = *groupname_arg = NULL; - groupname = NULL; - - V_STRDUP (spec, spec_arg); - - /* Find the separator if there is one. */ - separator = index (spec, ':'); - if (separator == NULL) - separator = index (spec, '.'); - - /* Replace separator with a NUL. */ - if (separator != NULL) - *separator = '\0'; - - /* Set U and G to non-zero length strings corresponding to user and - group specifiers or to NULL. */ - u = (*spec == '\0' ? NULL : spec); - - g = (separator == NULL || *(separator + 1) == '\0' - ? NULL - : separator + 1); - - if (u == NULL && g == NULL) - return "can not omit both user and group"; - - if (u != NULL) - { - pwd = getpwnam (u); - if (pwd == NULL) - { - - if (!isnumber (u)) - error_msg = "invalid user"; - else - { - int use_login_group; - use_login_group = (separator != NULL && g == NULL); - if (use_login_group) - error_msg = "cannot get the login group of a numeric UID"; - else - *uid = atoi (u); - } - } - else - { - *uid = pwd->pw_uid; - if (g == NULL && separator != NULL) - { - /* A separator was given, but a group was not specified, - so get the login group. */ - *gid = pwd->pw_gid; - grp = getgrgid (pwd->pw_gid); - if (grp == NULL) - { - /* This is enough room to hold the unsigned decimal - representation of any 32-bit quantity and the trailing - zero byte. */ - char uint_buf[21]; - sprintf (uint_buf, "%u", (unsigned) (pwd->pw_gid)); - V_STRDUP (groupname, uint_buf); - } - else - { - V_STRDUP (groupname, grp->gr_name); - } - endgrent (); - } - } - endpwent (); - } - - if (g != NULL && error_msg == NULL) - { - /* Explicit group. */ - grp = getgrnam (g); - if (grp == NULL) - { - if (!isnumber (g)) - error_msg = "invalid group"; - else - *gid = atoi (g); - } - else - *gid = grp->gr_gid; - endgrent (); /* Save a file descriptor. */ - - if (error_msg == NULL) - V_STRDUP (groupname, g); - } - - if (error_msg == NULL) - { - if (u != NULL) - { - *username_arg = strdup (u); - if (*username_arg == NULL) - error_msg = tired; - } - - if (groupname != NULL && error_msg == NULL) - { - *groupname_arg = strdup (groupname); - if (*groupname_arg == NULL) - { - if (*username_arg != NULL) - { - free (*username_arg); - *username_arg = NULL; - } - error_msg = tired; - } - } - } - - return error_msg; -} - -#ifdef TEST - -#define NULL_CHECK(s) ((s) == NULL ? "(null)" : (s)) - -int -main (int argc, char **argv) -{ - int i; - - for (i = 1; i < argc; i++) - { - const char *e; - char *username, *groupname; - uid_t uid; - gid_t gid; - char *tmp; - - tmp = strdup (argv[i]); - e = parse_user_spec (tmp, &uid, &gid, &username, &groupname); - free (tmp); - printf ("%s: %u %u %s %s %s\n", - argv[i], - (unsigned int) uid, - (unsigned int) gid, - NULL_CHECK (username), - NULL_CHECK (groupname), - NULL_CHECK (e)); - } - - exit (0); -} - -#endif |