c577145195
for displaying the three-line comment header by default. Reviewed by: kientzle Approved by: re (bmah)
300 lines
6.5 KiB
C
300 lines
6.5 KiB
C
/*-
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* Copyright (c) 1999, 2001, 2002 Robert N M Watson
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* All rights reserved.
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*
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* This software was developed by Robert Watson for the TrustedBSD Project.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* getfacl -- POSIX.1e utility to extract ACLs from files and directories
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* and send the results to stdout
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/acl.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <errno.h>
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#include <grp.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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int more_than_one = 0;
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static void
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usage(void)
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{
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fprintf(stderr, "getfacl [-dhq] [file ...]\n");
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}
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static char *
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getuname(uid_t uid)
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{
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struct passwd *pw;
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static char uids[10];
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if ((pw = getpwuid(uid)) == NULL) {
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(void)snprintf(uids, sizeof(uids), "%u", uid);
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return (uids);
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} else
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return (pw->pw_name);
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}
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static char *
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getgname(gid_t gid)
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{
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struct group *gr;
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static char gids[10];
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if ((gr = getgrgid(gid)) == NULL) {
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(void)snprintf(gids, sizeof(gids), "%u", gid);
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return (gids);
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} else
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return (gr->gr_name);
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}
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/*
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* return an ACL corresponding to the permissions
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* contained in struct stat
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*/
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static acl_t
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acl_from_stat(struct stat sb)
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{
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acl_t acl;
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acl_entry_t entry;
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acl_permset_t perms;
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/* create the ACL */
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acl = acl_init(3);
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if (!acl)
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return NULL;
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/* First entry: ACL_USER_OBJ */
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if (acl_create_entry(&acl, &entry) == -1)
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return NULL;
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if (acl_set_tag_type(entry, ACL_USER_OBJ) == -1)
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return NULL;
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if (acl_get_permset(entry, &perms) == -1)
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return NULL;
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if (acl_clear_perms(perms) == -1)
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return NULL;
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/* calculate user mode */
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if (sb.st_mode & S_IRUSR)
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if (acl_add_perm(perms, ACL_READ) == -1)
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return NULL;
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if (sb.st_mode & S_IWUSR)
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if (acl_add_perm(perms, ACL_WRITE) == -1)
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return NULL;
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if (sb.st_mode & S_IXUSR)
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if (acl_add_perm(perms, ACL_EXECUTE) == -1)
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return NULL;
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if (acl_set_permset(entry, perms) == -1)
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return NULL;
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/* Second entry: ACL_GROUP_OBJ */
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if (acl_create_entry(&acl, &entry) == -1)
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return NULL;
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if (acl_set_tag_type(entry, ACL_GROUP_OBJ) == -1)
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return NULL;
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if (acl_get_permset(entry, &perms) == -1)
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return NULL;
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if (acl_clear_perms(perms) == -1)
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return NULL;
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/* calculate group mode */
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if (sb.st_mode & S_IRGRP)
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if (acl_add_perm(perms, ACL_READ) == -1)
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return NULL;
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if (sb.st_mode & S_IWGRP)
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if (acl_add_perm(perms, ACL_WRITE) == -1)
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return NULL;
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if (sb.st_mode & S_IXGRP)
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if (acl_add_perm(perms, ACL_EXECUTE) == -1)
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return NULL;
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if (acl_set_permset(entry, perms) == -1)
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return NULL;
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/* Third entry: ACL_OTHER */
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if (acl_create_entry(&acl, &entry) == -1)
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return NULL;
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if (acl_set_tag_type(entry, ACL_OTHER) == -1)
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return NULL;
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if (acl_get_permset(entry, &perms) == -1)
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return NULL;
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if (acl_clear_perms(perms) == -1)
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return NULL;
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/* calculate other mode */
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if (sb.st_mode & S_IROTH)
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if (acl_add_perm(perms, ACL_READ) == -1)
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return NULL;
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if (sb.st_mode & S_IWOTH)
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if (acl_add_perm(perms, ACL_WRITE) == -1)
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return NULL;
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if (sb.st_mode & S_IXOTH)
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if (acl_add_perm(perms, ACL_EXECUTE) == -1)
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return NULL;
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if (acl_set_permset(entry, perms) == -1)
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return NULL;
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return(acl);
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}
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static int
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print_acl(char *path, acl_type_t type, int hflag, int qflag)
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{
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struct stat sb;
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acl_t acl;
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char *acl_text;
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int error;
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if (hflag)
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error = lstat(path, &sb);
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else
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error = stat(path, &sb);
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if (error == -1) {
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warn("%s", path);
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return(-1);
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}
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if (more_than_one)
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printf("\n");
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else
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more_than_one++;
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if (!qflag)
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printf("# file: %s\n# owner: %s\n# group: %s\n", path,
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getuname(sb.st_uid), getgname(sb.st_gid));
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if (hflag)
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acl = acl_get_link_np(path, type);
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else
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acl = acl_get_file(path, type);
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if (!acl) {
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if (errno != EOPNOTSUPP) {
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warn("%s", path);
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return(-1);
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}
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errno = 0;
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if (type != ACL_TYPE_ACCESS)
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return(0);
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acl = acl_from_stat(sb);
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if (!acl) {
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warn("acl_from_stat()");
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return(-1);
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}
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}
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acl_text = acl_to_text(acl, 0);
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if (!acl_text) {
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warn("%s", path);
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return(-1);
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}
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printf("%s", acl_text);
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(void)acl_free(acl);
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(void)acl_free(acl_text);
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return(0);
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}
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static int
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print_acl_from_stdin(acl_type_t type, int hflag, int qflag)
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{
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char *p, pathname[PATH_MAX];
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int carried_error = 0;
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while (fgets(pathname, (int)sizeof(pathname), stdin)) {
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if ((p = strchr(pathname, '\n')) != NULL)
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*p = '\0';
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if (print_acl(pathname, type, hflag, qflag) == -1) {
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carried_error = -1;
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}
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}
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return(carried_error);
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}
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int
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main(int argc, char *argv[])
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{
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acl_type_t type = ACL_TYPE_ACCESS;
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int carried_error = 0;
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int ch, error, i;
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int hflag, qflag;
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hflag = 0;
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qflag = 0;
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while ((ch = getopt(argc, argv, "dhq")) != -1)
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switch(ch) {
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case 'd':
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type = ACL_TYPE_DEFAULT;
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break;
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case 'h':
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hflag = 1;
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break;
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case 'q':
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qflag = 1;
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break;
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default:
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usage();
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return(-1);
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}
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argc -= optind;
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argv += optind;
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if (argc == 0) {
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error = print_acl_from_stdin(type, hflag, qflag);
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return(error ? 1 : 0);
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}
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for (i = 0; i < argc; i++) {
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if (!strcmp(argv[i], "-")) {
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error = print_acl_from_stdin(type, hflag, qflag);
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if (error == -1)
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carried_error = -1;
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} else {
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error = print_acl(argv[i], type, hflag, qflag);
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if (error == -1)
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carried_error = -1;
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}
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}
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return(carried_error ? 1 : 0);
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}
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