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/*
FUSE: Filesystem in Userspace
Copyright (C) 2005 Csaba Henk <csaba.henk@creo.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 <fcntl.h>
#include <errno.h>
#include <sys/wait.h>
#define FUSERMOUNT_PROG "mount_fusefs"
void fuse_unmount(const char *mountpoint)
{
char dev[128];
char *ssc, *umount_cmd;
FILE *sf;
int rv;
char *seekscript =
"/usr/bin/fstat /dev/fuse* | "
"/usr/bin/awk 'BEGIN{ getline; if (! ($3 == \"PID\" && $10 == \"NAME\")) exit 1; }; "
" { if ($3 == %d) print $10; }' | "
"/usr/bin/sort | "
"/usr/bin/uniq | "
"/usr/bin/awk '{ i += 1; if (i > 1){ exit 1; }; printf; }; END{ if (i == 0) exit 1; }'";
asprintf(&ssc, seekscript, getpid());
errno = 0;
sf = popen(ssc, "r");
if (! sf)
return;
fgets(dev, sizeof(dev), sf);
rv = pclose(sf);
if (rv)
return;
asprintf(&umount_cmd, "/sbin/umount %s", dev);
system(umount_cmd);
}
int fuse_mount(const char *mountpoint, const char *opts)
{
const char *mountprog = FUSERMOUNT_PROG;
int fd;
char *fdnam, *dev;
int pid;
fdnam = getenv("FUSE_DEV_FD");
if (fdnam) {
char *ep;
fd = strtol(fdnam, &ep, 10);
if (*ep != '\0') {
fprintf(stderr, "invalid value given in FUSE_DEV_FD\n");
return -1;
}
if (fd < 0)
return -1;
goto mount;
}
dev = getenv("FUSE_DEV_NAME");
if (! dev)
dev = "/dev/fuse";
if ((fd = open(dev, O_RDWR)) < 0) {
perror("fuse: failed to open fuse device");
return -1;
}
mount:
if (getenv("FUSE_NO_MOUNT") || ! mountpoint)
goto out;
pid = fork();
if (pid == -1) {
perror("fuse: fork() failed");
close(fd);
return -1;
}
if (pid == 0) {
pid = fork();
if (pid == -1) {
perror("fuse: fork() failed");
close(fd);
exit(1);
}
if (pid == 0) {
const char *argv[32];
int a = 0;
if (! fdnam)
asprintf(&fdnam, "%d", fd);
argv[a++] = mountprog;
if (opts) {
argv[a++] = "-o";
argv[a++] = opts;
}
argv[a++] = fdnam;
argv[a++] = mountpoint;
argv[a++] = NULL;
setenv("MOUNT_FUSEFS_SAFE", "1", 1);
setenv("MOUNT_FUSEFS_NOINTERACTIVE", "1", 1);
execvp(mountprog, (char **) argv);
perror("fuse: failed to exec mount program");
exit(1);
}
exit(0);
}
waitpid(pid, NULL, 0);
out:
return fd;
}
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