src/acl_get.c

/*
 * Copyright (c) 2001-2002 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * 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.
 *
 * This program is distributed in the hope that it would 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 the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

/*
 * Get an access or default acl on a file
 * using IRIX semantics or Linux semantics
 */
 
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <getopt.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/acl.h>
#include <acl/libacl.h>

char *prog;

void usage(void)
{
    fprintf(stderr, "usage: %s [-a] [-d] [-f] [-i] path\n"
           "flags:\n"
           "    -a - get access ACL\n"
           "    -d - get default ACL\n" 
           "    -f - get access ACL using file descriptor\n" 
           ,prog);
           
}



int
main(int argc, char **argv)
{
	int c;
        char *file;
	char *acl_text;
	int getaccess = 0;
	int getdefault = 0;
	int usefd = 0;
	int fd = -1;
	acl_t acl;

        prog = basename(argv[0]);

	while ((c = getopt(argc, argv, "adf")) != -1) {
		switch (c) {
		case 'a':
			getaccess = 1;
			break;
		case 'd':
			getdefault = 1;
			break;
		case 'f':
			usefd = 1;
			break;
		case '?':
                        usage();
			return 1;
		}
	}

	if (getdefault && usefd) {
	    fprintf(stderr, "%s: -f and -d are not compatible\n", prog);
	    return 1;
	}

        /* need path */
        if (optind == argc) {
            usage();
            exit(1);
        }
	else {
	    file = argv[optind];
	} 

	if (usefd) {
	    fd = open(file, O_RDONLY);
	    if (fd < 0) {
		fprintf (stderr, "%s: error opening \"%s\": %s\n",
			     prog, file, strerror(errno));
	 	usage(); 
		return 1;

	    }	
	}

        if (getaccess) {
	    if (usefd) { 
		acl = acl_get_fd(fd);
	    }
	    else {
		acl = acl_get_file(file, ACL_TYPE_ACCESS);
	    }
	    if (acl == NULL) {
		fprintf(stderr, "%s: error getting access ACL on \"%s\": %s\n",
			     prog, file, strerror(errno));
		return 0;
	    }
	    acl_text = acl_to_any_text(acl, NULL, ',', TEXT_ABBREVIATE);
	    if (acl_text == NULL) {
	    	fprintf(stderr, "%s: cannot get access ACL text on '%s': %s\n",
			prog, file, strerror(errno));
	    	return 0;
	    }
	    printf("%s: access %s", file, acl_text);
	    acl_free(acl_text);
	    acl_free(acl);
	}

        if (getdefault) {
	    acl = acl_get_file(file, ACL_TYPE_DEFAULT);
	    if (acl == NULL) {
		fprintf(stderr, "%s: error getting default ACL on \"%s\": %s\n",
			     prog, file, strerror(errno));
		return 0;
	    }
	    acl_text = acl_to_any_text(acl, NULL, ',', TEXT_ABBREVIATE);
	    if (acl_text == NULL) {
	    	fprintf(stderr, "%s: cannot get default ACL text on '%s': %s\n",
			prog, file, strerror(errno));
	    	return 0;
	    }
	    printf("%s: default %s", file, acl_text);
	    acl_free(acl_text);
	    acl_free(acl);
	}

	return 0;
}