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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2017 Nexenta Systems, Inc. All rights reserved.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <attr.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <libnvpair.h>
extern const char *__progname;
int vflag = 0;
static int
dosattr_set_ro(int fildes, const char *fname)
{
nvlist_t *nvl = NULL;
int err;
err = nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0);
if (err != 0)
return (err);
(void) nvlist_add_boolean_value(nvl, A_READONLY, 1);
if (fname == NULL) {
err = fsetattr(fildes, XATTR_VIEW_READWRITE, nvl);
} else {
err = setattrat(fildes, XATTR_VIEW_READWRITE, fname, nvl);
}
if (err < 0) {
err = errno;
if (vflag > 1) {
(void) fprintf(stderr,
"dosattr_set: setattrat (%s), err %d\n",
fname, err);
}
}
nvlist_free(nvl);
return (err);
}
void
usage(void)
{
(void) fprintf(stderr, "usage: %s [-v] file\n",
__progname);
exit(1);
}
int
main(int argc, char **argv)
{
char *fname;
int c, fd, n;
while ((c = getopt(argc, argv, "v")) != -1) {
switch (c) {
case 'v':
vflag++;
break;
case '?':
default:
usage();
break;
}
}
if (optind + 1 != argc)
usage();
fname = argv[optind];
fd = open(fname, O_CREAT | O_RDWR, 0644);
if (fd < 0) {
perror(fname);
exit(1);
}
if (vflag)
(void) fprintf(stderr, "Write 1 (mode 644)\n");
n = write(fd, "mode 644 OK\n", 12);
if (n != 12) {
(void) fprintf(stderr, "write mode 644, err=%d\n", errno);
exit(1);
}
if (vflag)
(void) fprintf(stderr, "Chmod 444\n");
n = fchmod(fd, 0444);
if (n < 0) {
(void) fprintf(stderr, "chmod 444, err=%d\n", errno);
exit(1);
}
if (vflag)
(void) fprintf(stderr, "Write 2 (mode 444)\n");
n = write(fd, "mode 444 OK\n", 12);
if (n != 12) {
(void) fprintf(stderr, "write mode 444, err=%d\n", errno);
exit(1);
}
if (vflag)
(void) fprintf(stderr, "Set DOS R/O\n");
n = dosattr_set_ro(fd, NULL /* fname? */);
if (n != 0) {
(void) fprintf(stderr, "Set R/O, err=%d\n", n);
exit(1);
}
/*
* This fails, but write on an already open handle should succeed
* the same as when we've set the mode to 444 after open.
*/
if (vflag)
(void) fprintf(stderr, "Write 3 (DOS R/O)\n");
n = write(fd, "Write DOS RO?\n", 14);
if (n != 14) {
(void) fprintf(stderr, "write (DOS R/O), err=%d\n", errno);
exit(1);
}
return (0);
}
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