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/*
FUSE: Filesystem in Userspace
Copyright (C) 2001 Miklos Szeredi (mszeredi@inf.bme.hu)
This program can be distributed under the terms of the GNU LGPL.
See the file COPYING.LIB.
*/
#include "fuse.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <limits.h>
#include <signal.h>
static struct fuse *fuse;
struct fuse *fuse_get(void)
{
return fuse;
}
static void usage(char *progname)
{
fprintf(stderr,
"usage: %s mountpoint [options] [-- [fusermount options]]\n"
"Options:\n"
" -d enable debug output (implies -f)\n"
" -f foreground operation\n"
" -s disable multithreaded operation\n"
" -h print help\n"
"\n"
"Fusermount options:\n"
" see 'fusermount -h'\n",
progname);
exit(1);
}
static void invalid_option(char *argv[], int argctr)
{
fprintf(stderr, "invalid option: %s\n", argv[argctr]);
usage(argv[0]);
}
static void exit_handler()
{
if (fuse != NULL)
fuse_exit(fuse);
}
static void set_one_signal_handler(int signal, void (*handler)(int))
{
struct sigaction sa;
struct sigaction old_sa;
sa.sa_handler = handler;
sigemptyset(&(sa.sa_mask));
sa.sa_flags = 0;
if (sigaction(signal, NULL, &old_sa) == -1) {
perror("FUSE: cannot get old signal handler");
exit(1);
}
if (old_sa.sa_handler == SIG_DFL &&
sigaction(signal, &sa, NULL) == -1) {
perror("Cannot set signal handler");
exit(1);
}
}
static void set_signal_handlers()
{
set_one_signal_handler(SIGHUP, exit_handler);
set_one_signal_handler(SIGINT, exit_handler);
set_one_signal_handler(SIGTERM, exit_handler);
set_one_signal_handler(SIGPIPE, SIG_IGN);
}
static int fuse_start(int fuse_fd, int flags, int multithreaded,
int background, const struct fuse_operations *op)
{
int pid;
fuse = fuse_new(fuse_fd, flags, op);
if (fuse == NULL)
return 1;
if (background) {
pid = fork();
if (pid == -1)
return 1;
if (pid)
exit(0);
}
set_signal_handlers();
if (multithreaded)
fuse_loop_mt(fuse);
else
fuse_loop(fuse);
fuse_destroy(fuse);
return 0;
}
void fuse_main(int argc, char *argv[], const struct fuse_operations *op)
{
int argctr;
int flags;
int multithreaded;
int background;
int fuse_fd;
char *fuse_mountpoint = NULL;
char **fusermount_args = NULL;
char *newargs[3];
char *basename;
int err;
flags = 0;
multithreaded = 1;
background = 1;
for (argctr = 1; argctr < argc && !fusermount_args; argctr ++) {
if (argv[argctr][0] == '-') {
if (strlen(argv[argctr]) == 2)
switch (argv[argctr][1]) {
case 'd':
flags |= FUSE_DEBUG;
background = 0;
break;
case 'f':
background = 0;
break;
case 's':
multithreaded = 0;
break;
case 'h':
usage(argv[0]);
break;
case '-':
fusermount_args = &argv[argctr+1];
break;
default:
invalid_option(argv, argctr);
}
else
invalid_option(argv, argctr);
} else if (fuse_mountpoint == NULL)
fuse_mountpoint = strdup(argv[argctr]);
else
invalid_option(argv, argctr);
}
if (fuse_mountpoint == NULL) {
fprintf(stderr, "missing mountpoint\n");
usage(argv[0]);
}
if (fusermount_args != NULL)
fusermount_args -= 2; /* Hack! */
else {
fusermount_args = newargs;
fusermount_args[2] = NULL;
}
basename = strrchr(argv[0], '/');
if (basename == NULL)
basename = argv[0];
else if (basename[1] != '\0')
basename++;
fusermount_args[0] = "-n";
fusermount_args[1] = basename;
fuse_fd = fuse_mount(fuse_mountpoint, (const char **) fusermount_args);
if (fuse_fd == -1)
exit(1);
err = fuse_start(fuse_fd, flags, multithreaded, background, op);
close(fuse_fd);
fuse_unmount(fuse_mountpoint);
if (err)
exit(err);
}
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