freebsd-dev/bin/getfacl/getfacl.c

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/*-
* Copyright (c) 1999-2001 Robert N M Watson
* All rights reserved.
*
* This software was developed by Robert Watson for the TrustedBSD Project.
*
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $FreeBSD$
*/
/*
* getfacl -- POSIX.1e utility to extract ACLs from files and directories
* and send the results to stdout
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/acl.h>
#include <sys/stat.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int more_than_one = 0;
static void
usage(void)
{
fprintf(stderr, "getfacl [-d] [files ...]\n");
}
/*
* return an ACL corresponding to the permissions
* contained in struct stat
*/
static acl_t
acl_from_stat(struct stat sb)
{
acl_t acl;
acl_entry_t entry;
acl_permset_t perms;
/* create the ACL */
acl = acl_init(3);
if (!acl)
return NULL;
/* First entry: ACL_USER_OBJ */
if (acl_create_entry(&acl, &entry) == -1)
return NULL;
if (acl_set_tag_type(entry, ACL_USER_OBJ) == -1)
return NULL;
if (acl_get_permset(entry, &perms) == -1)
return NULL;
if (acl_clear_perms(perms) == -1)
return NULL;
/* calculate user mode */
if (sb.st_mode & S_IRUSR)
if (acl_add_perm(perms, ACL_READ) == -1)
return NULL;
if (sb.st_mode & S_IWUSR)
if (acl_add_perm(perms, ACL_WRITE) == -1)
return NULL;
if (sb.st_mode & S_IXUSR)
if (acl_add_perm(perms, ACL_EXECUTE) == -1)
return NULL;
if (acl_set_permset(entry, perms) == -1)
return NULL;
/* Second entry: ACL_GROUP_OBJ */
if (acl_create_entry(&acl, &entry) == -1)
return NULL;
if (acl_set_tag_type(entry, ACL_GROUP_OBJ) == -1)
return NULL;
if (acl_get_permset(entry, &perms) == -1)
return NULL;
if (acl_clear_perms(perms) == -1)
return NULL;
/* calculate group mode */
if (sb.st_mode & S_IRGRP)
if (acl_add_perm(perms, ACL_READ) == -1)
return NULL;
if (sb.st_mode & S_IWGRP)
if (acl_add_perm(perms, ACL_WRITE) == -1)
return NULL;
if (sb.st_mode & S_IXGRP)
if (acl_add_perm(perms, ACL_EXECUTE) == -1)
return NULL;
if (acl_set_permset(entry, perms) == -1)
return NULL;
/* Third entry: ACL_OTHER */
if (acl_create_entry(&acl, &entry) == -1)
return NULL;
if (acl_set_tag_type(entry, ACL_OTHER) == -1)
return NULL;
if (acl_get_permset(entry, &perms) == -1)
return NULL;
if (acl_clear_perms(perms) == -1)
return NULL;
/* calculate other mode */
if (sb.st_mode & S_IROTH)
if (acl_add_perm(perms, ACL_READ) == -1)
return NULL;
if (sb.st_mode & S_IWOTH)
if (acl_add_perm(perms, ACL_WRITE) == -1)
return NULL;
if (sb.st_mode & S_IXOTH)
if (acl_add_perm(perms, ACL_EXECUTE) == -1)
return NULL;
if (acl_set_permset(entry, perms) == -1)
return NULL;
return(acl);
}
static int
print_acl(char *path, acl_type_t type)
{
struct stat sb;
acl_t acl;
char *acl_text;
int error;
error = stat(path, &sb);
if (error == -1) {
perror(path);
return(-1);
}
if (more_than_one)
printf("\n");
else
more_than_one++;
printf("#file:%s\n#owner:%d\n#group:%d\n", path, sb.st_uid, sb.st_gid);
acl = acl_get_file(path, type);
if (!acl) {
if (errno != EOPNOTSUPP) {
warn("%s", path);
return(-1);
}
errno = 0;
if (type != ACL_TYPE_ACCESS)
return(0);
acl = acl_from_stat(sb);
if (!acl) {
perror("acl_from_stat()");
return(-1);
}
}
acl_text = acl_to_text(acl, 0);
if (!acl_text) {
perror(path);
return(-1);
}
printf("%s", acl_text);
(void)acl_free(acl);
(void)acl_free(acl_text);
return(0);
}
static int
print_acl_from_stdin(acl_type_t type)
{
char pathname[PATH_MAX];
int carried_error = 0;
pathname[sizeof(pathname) - 1] = '\0';
while (fgets(pathname, (int)sizeof(pathname), stdin)) {
/* remove the \n */
pathname[strlen(pathname) - 1] = '\0';
if (print_acl(pathname, type) == -1) {
carried_error = -1;
}
}
return(carried_error);
}
int
main(int argc, char *argv[])
{
acl_type_t type = ACL_TYPE_ACCESS;
int carried_error = 0;
int ch, error, i;
while ((ch = getopt(argc, argv, "d")) != -1)
switch(ch) {
case 'd':
type = ACL_TYPE_DEFAULT;
break;
default:
usage();
return(-1);
}
argc -= optind;
argv += optind;
if (argc == 0) {
error = print_acl_from_stdin(type);
return(error);
}
for (i = 0; i < argc; i++) {
if (!strcmp(argv[i], "-")) {
error = print_acl_from_stdin(type);
if (error == -1)
carried_error = -1;
} else {
error = print_acl(argv[i], type);
if (error == -1)
carried_error = -1;
}
}
return(carried_error);
}