1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
/*
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>
#define FUSE_MOUNTED_ENV "_FUSE_MOUNTED"
#define FUSE_UMOUNT_CMD_ENV "_FUSE_UNMOUNT_CMD"
static struct fuse *fuse;
static void usage(char *progname)
{
fprintf(stderr,
"usage: %s mountpoint [options] \n"
"Options:\n"
" -d enable debug output\n"
" -s disable multithreaded operation\n"
" -h print help\n",
progname);
exit(1);
}
static void exit_handler()
{
if(fuse != NULL)
fuse_exit(fuse);
}
static void set_signal_handlers()
{
struct sigaction sa;
sa.sa_handler = exit_handler;
sigemptyset(&(sa.sa_mask));
sa.sa_flags = 0;
if (sigaction(SIGHUP, &sa, NULL) == -1 ||
sigaction(SIGINT, &sa, NULL) == -1 ||
sigaction(SIGTERM, &sa, NULL) == -1) {
perror("Cannot set exit signal handlers");
exit(1);
}
sa.sa_handler = SIG_IGN;
if(sigaction(SIGPIPE, &sa, NULL) == -1) {
perror("Cannot set ignored signals");
exit(1);
}
}
void fuse_main(int argc, char *argv[], const struct fuse_operations *op)
{
int argctr = 1;
int flags;
int multithreaded;
char *isreexec = getenv(FUSE_MOUNTED_ENV);
int fuse_fd;
char *fuse_mountpoint = NULL;
char umount_cmd[1024] = "";
if(isreexec == NULL) {
if(argc < 2 || argv[1][0] == '-')
usage(argv[0]);
fuse_mountpoint = strdup(argv[1]);
fuse_fd = fuse_mount(fuse_mountpoint, NULL);
if(fuse_fd == -1)
exit(1);
argctr++;
}
else {
char *tmpstr;
/* Old (obsolescent) way of doing the mount:
fusermount [options] mountpoint [program [args ...]]
fusermount execs this program and passes the control file
descriptor dup()-ed to stdin */
fuse_fd = 0;
tmpstr = getenv(FUSE_UMOUNT_CMD_ENV);
if(tmpstr != NULL)
strncpy(umount_cmd, tmpstr, sizeof(umount_cmd) - 1);
}
set_signal_handlers();
flags = 0;
multithreaded = 1;
for(; argctr < argc && argv[argctr][0] == '-'; argctr ++) {
switch(argv[argctr][1]) {
case 'd':
flags |= FUSE_DEBUG;
break;
case 's':
multithreaded = 0;
break;
case 'h':
usage(argv[0]);
break;
default:
fprintf(stderr, "invalid option: %s\n", argv[argctr]);
exit(1);
}
}
if(argctr != argc) {
fprintf(stderr, "missing or surplus argument\n");
exit(1);
}
fuse = fuse_new(fuse_fd, flags, op);
if(multithreaded)
fuse_loop_mt(fuse);
else
fuse_loop(fuse);
close(fuse_fd);
if(fuse_mountpoint != NULL)
fuse_unmount(fuse_mountpoint);
else if(umount_cmd[0] != '\0')
system(umount_cmd);
}
|
