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/* |
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FUSE: Filesystem in Userspace |
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Copyright (C) 2001-2004 Miklos Szeredi <miklos@szeredi.hu> |
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|
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This program can be distributed under the terms of the GNU LGPL. |
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See the file COPYING.LIB. |
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*/ |
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|
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#include "fuse.h" |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include <string.h> |
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#include <limits.h> |
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#include <signal.h> |
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|
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static struct fuse *fuse; |
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|
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struct fuse *fuse_get(void) |
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{ |
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return fuse; |
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} |
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|
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static void usage(char *progname) |
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{ |
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fprintf(stderr, |
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"usage: %s mountpoint [options]\n" |
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"Options:\n" |
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" -d enable debug output (implies -f)\n" |
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" -f foreground operation\n" |
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" -s disable multithreaded operation\n" |
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" -o opt,[opt...] mount options\n" |
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" -h print help\n" |
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"\n" |
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"Mount options:\n" |
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" default_permissions enable permission checking\n" |
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" allow_other allow access to other users\n" |
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" kernel_cache cache files in kernel\n" |
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" large_read issue large read requests (2.4 only)\n" |
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" direct_io use direct I/O\n" |
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" max_read=N set maximum size of read requests\n" |
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" hard_remove immediate removal (don't hide files)\n" |
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" debug enable debug output\n" |
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" fsname=NAME set filesystem name in mtab\n", |
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progname); |
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exit(1); |
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} |
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|
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static void invalid_option(char *argv[], int argctr) |
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{ |
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fprintf(stderr, "invalid option: %s\n\n", argv[argctr]); |
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usage(argv[0]); |
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} |
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|
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static void exit_handler() |
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{ |
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if (fuse != NULL) |
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fuse_exit(fuse); |
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} |
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|
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static void set_one_signal_handler(int signal, void (*handler)(int)) |
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{ |
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struct sigaction sa; |
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struct sigaction old_sa; |
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|
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memset(&sa, 0, sizeof(struct sigaction)); |
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sa.sa_handler = handler; |
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sigemptyset(&(sa.sa_mask)); |
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sa.sa_flags = 0; |
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|
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if (sigaction(signal, NULL, &old_sa) == -1) { |
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perror("FUSE: cannot get old signal handler"); |
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exit(1); |
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} |
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|
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if (old_sa.sa_handler == SIG_DFL && |
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sigaction(signal, &sa, NULL) == -1) { |
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perror("Cannot set signal handler"); |
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exit(1); |
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} |
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} |
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|
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static void set_signal_handlers() |
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{ |
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set_one_signal_handler(SIGHUP, exit_handler); |
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set_one_signal_handler(SIGINT, exit_handler); |
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set_one_signal_handler(SIGTERM, exit_handler); |
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set_one_signal_handler(SIGPIPE, SIG_IGN); |
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} |
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|
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static int fuse_do(int fuse_fd, const char *opts, int multithreaded, |
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int background, const struct fuse_operations *op) |
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{ |
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int pid; |
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|
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fuse = fuse_new(fuse_fd, opts, op); |
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if (fuse == NULL) |
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return 1; |
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|
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if (background) { |
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pid = fork(); |
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if (pid == -1) |
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return 1; |
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|
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if (pid) |
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exit(0); |
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} |
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|
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set_signal_handlers(); |
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|
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if (multithreaded) |
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fuse_loop_mt(fuse); |
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else |
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fuse_loop(fuse); |
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|
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fuse_destroy(fuse); |
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|
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return 0; |
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} |
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|
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static void add_option_to(const char *opt, char **optp) |
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{ |
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unsigned len = strlen(opt); |
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if (*optp) { |
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unsigned oldlen = strlen(*optp); |
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*optp = realloc(*optp, oldlen + 1 + len + 1); |
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(*optp)[oldlen] = ','; |
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strcpy(*optp + oldlen + 1, opt); |
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} else { |
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*optp = malloc(len + 1); |
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strcpy(*optp, opt); |
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} |
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} |
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|
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static void add_options(char **lib_optp, char **kernel_optp, const char *opts) |
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{ |
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char *xopts = strdup(opts); |
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char *s = xopts; |
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char *opt; |
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|
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while((opt = strsep(&s, ",")) != NULL) { |
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if (fuse_is_lib_option(opt)) |
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add_option_to(opt, lib_optp); |
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else |
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add_option_to(opt, kernel_optp); |
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} |
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free(xopts); |
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} |
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|
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void fuse_main(int argc, char *argv[], const struct fuse_operations *op) |
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{ |
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int argctr; |
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int multithreaded; |
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int background; |
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int fuse_fd; |
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char *fuse_mountpoint = NULL; |
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char *basename; |
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char *kernel_opts = NULL; |
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char *lib_opts = NULL; |
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char *fsname_opt; |
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int err; |
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|
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basename = strrchr(argv[0], '/'); |
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if (basename == NULL) |
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basename = argv[0]; |
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else if (basename[1] != '\0') |
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basename++; |
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|
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fsname_opt = malloc(strlen(basename) + 64); |
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sprintf(fsname_opt, "fsname=%s", basename); |
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add_options(&lib_opts, &kernel_opts, fsname_opt); |
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free(fsname_opt); |
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|
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multithreaded = 1; |
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background = 1; |
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for (argctr = 1; argctr < argc; argctr ++) { |
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if (argv[argctr][0] == '-') { |
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if (strlen(argv[argctr]) == 2) |
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switch (argv[argctr][1]) { |
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case 'o': |
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if (argctr + 1 == argc || argv[argctr+1][0] == '-') { |
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fprintf(stderr, "missing option after -o\n\n"); |
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usage(argv[0]); |
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} |
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argctr ++; |
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add_options(&lib_opts, &kernel_opts, argv[argctr]); |
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break; |
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|
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case 'd': |
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add_options(&lib_opts, &kernel_opts, "debug"); |
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background = 0; |
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break; |
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|
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case 'f': |
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background = 0; |
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break; |
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|
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case 's': |
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multithreaded = 0; |
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break; |
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|
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case 'h': |
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usage(argv[0]); |
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break; |
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|
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default: |
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invalid_option(argv, argctr); |
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} |
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else { |
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if (argv[argctr][1] == 'o') |
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add_options(&lib_opts, &kernel_opts, &argv[argctr][2]); |
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else |
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invalid_option(argv, argctr); |
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} |
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} else if (fuse_mountpoint == NULL) |
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fuse_mountpoint = strdup(argv[argctr]); |
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else |
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invalid_option(argv, argctr); |
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} |
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|
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if (fuse_mountpoint == NULL) { |
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fprintf(stderr, "missing mountpoint\n\n"); |
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usage(argv[0]); |
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} |
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|
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fuse_fd = fuse_mount(fuse_mountpoint, kernel_opts); |
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if (fuse_fd == -1) |
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exit(1); |
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if (kernel_opts) |
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free(kernel_opts); |
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|
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err = fuse_do(fuse_fd, lib_opts, multithreaded, background, op); |
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if (lib_opts) |
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free(lib_opts); |
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close(fuse_fd); |
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fuse_unmount(fuse_mountpoint); |
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if (err) |
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exit(err); |
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} |
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