mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-12-29 12:29:35 +03:00
9a70e97fe1
Unfortunately macOS has obj-C keyword "fallthrough" in the OS headers. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Damian Szuberski <szuberskidamian@gmail.com> Signed-off-by: Jorgen Lundman <lundman@lundman.net> Closes #13097
168 lines
3.1 KiB
C
168 lines
3.1 KiB
C
/*
|
|
* 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 (c) 2012 by Delphix. All rights reserved.
|
|
*/
|
|
|
|
/*
|
|
* Make a directory busy. If the argument is an existing file or directory,
|
|
* simply open it directly and pause. If not, verify that the parent directory
|
|
* exists, and create a new file in that directory.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <dirent.h>
|
|
#include <strings.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
|
|
|
|
static __attribute__((noreturn)) void
|
|
usage(char *progname)
|
|
{
|
|
(void) fprintf(stderr, "Usage: %s <dirname|filename>\n", progname);
|
|
exit(1);
|
|
}
|
|
|
|
static __attribute__((noreturn)) void
|
|
fail(char *err)
|
|
{
|
|
perror(err);
|
|
exit(1);
|
|
}
|
|
|
|
static void
|
|
daemonize(void)
|
|
{
|
|
pid_t pid;
|
|
|
|
if ((pid = fork()) < 0) {
|
|
fail("fork");
|
|
} else if (pid != 0) {
|
|
(void) fprintf(stdout, "%ld\n", (long)pid);
|
|
exit(0);
|
|
}
|
|
|
|
(void) setsid();
|
|
(void) close(0);
|
|
(void) close(1);
|
|
(void) close(2);
|
|
}
|
|
|
|
|
|
static const char *
|
|
get_basename(const char *path)
|
|
{
|
|
const char *bn = strrchr(path, '/');
|
|
return (bn ? bn + 1 : path);
|
|
}
|
|
|
|
static ssize_t
|
|
get_dirnamelen(const char *path)
|
|
{
|
|
const char *end = strrchr(path, '/');
|
|
return (end ? end - path : -1);
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
int c;
|
|
boolean_t isdir = B_FALSE;
|
|
struct stat sbuf;
|
|
char *fpath = NULL;
|
|
char *prog = argv[0];
|
|
|
|
while ((c = getopt(argc, argv, "")) != -1) {
|
|
switch (c) {
|
|
default:
|
|
usage(prog);
|
|
}
|
|
}
|
|
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (argc != 1)
|
|
usage(prog);
|
|
|
|
if (stat(argv[0], &sbuf) != 0) {
|
|
char *arg;
|
|
const char *dname, *fname;
|
|
size_t arglen;
|
|
ssize_t dnamelen;
|
|
|
|
/*
|
|
* The argument supplied doesn't exist. Copy the path, and
|
|
* remove the trailing slash if present.
|
|
*/
|
|
if ((arg = strdup(argv[0])) == NULL)
|
|
fail("strdup");
|
|
arglen = strlen(arg);
|
|
if (arg[arglen - 1] == '/')
|
|
arg[arglen - 1] = '\0';
|
|
|
|
/* Get the directory and file names. */
|
|
fname = get_basename(arg);
|
|
dname = arg;
|
|
if ((dnamelen = get_dirnamelen(arg)) != -1)
|
|
arg[dnamelen] = '\0';
|
|
else
|
|
dname = ".";
|
|
|
|
/* The directory portion of the path must exist */
|
|
if (stat(dname, &sbuf) != 0 || !(sbuf.st_mode & S_IFDIR))
|
|
usage(prog);
|
|
|
|
if (asprintf(&fpath, "%s/%s", dname, fname) == -1)
|
|
fail("asprintf");
|
|
|
|
free(arg);
|
|
} else
|
|
switch (sbuf.st_mode & S_IFMT) {
|
|
case S_IFDIR:
|
|
isdir = B_TRUE;
|
|
zfs_fallthrough;
|
|
case S_IFLNK:
|
|
case S_IFCHR:
|
|
case S_IFBLK:
|
|
if ((fpath = strdup(argv[0])) == NULL)
|
|
fail("strdup");
|
|
break;
|
|
default:
|
|
usage(prog);
|
|
}
|
|
|
|
if (!isdir) {
|
|
int fd;
|
|
|
|
if ((fd = open(fpath, O_CREAT | O_RDWR, 0600)) < 0)
|
|
fail("open");
|
|
} else {
|
|
DIR *dp;
|
|
|
|
if ((dp = opendir(fpath)) == NULL)
|
|
fail("opendir");
|
|
}
|
|
free(fpath);
|
|
|
|
daemonize();
|
|
(void) pause();
|
|
|
|
return (0);
|
|
}
|