490e0de548
Import libpuffs and our port of libpuffs. The port was done as part of GSoC 2011 FUSE project, done by Evgeniy Ivanov. The librefuse import did not require any porting efforts. Libpuffs has been modified to understand our VFS-FS protocol and translate between that and PUFFS. As an example that it works, fuse-ntfs-3g from pkgsrc can be compiled and used to mount ntfs partitions: mount -t ntfs-3g <device> <mountpoint> FUSE only works with the asynchronous version of VFS. See <docs/UPDATING> on how to run AVFS. This patch further includes some changes to mount(1) and mount(2) so it's possible to use file systems provided by pkgsrc (note: manual modifications to /etc/system.conf are still needed. There has been made an exception for fuse-ntfs-3g, so it already as an entry).
369 lines
8.7 KiB
C
369 lines
8.7 KiB
C
/* $NetBSD: refuse_opt.c,v 1.14 2009/01/19 09:56:06 lukem Exp $ */
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/*-
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* Copyright (c) 2007 Juan Romero Pardines.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* TODO:
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* * -oblah,foo... works, but the options are not enabled.
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* * -ofoo=%s (accepts a string) or -ofoo=%u (int) is not
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* supported for now.
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* * void *data: how is it used? I think it's used to enable
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* options or pass values for the matching options.
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*/
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#include <sys/types.h>
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#include <err.h>
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#include <fuse.h>
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#include <fuse_opt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef FUSE_OPT_DEBUG
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#define DPRINTF(x) do { printf x; } while ( /* CONSTCOND */ 0)
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#else
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#define DPRINTF(x)
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#endif
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enum {
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KEY_HELP,
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KEY_VERBOSE,
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KEY_VERSION
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};
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struct fuse_opt_option {
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const struct fuse_opt *fop;
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char *option;
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int key;
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void *data;
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};
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static int fuse_opt_popt(struct fuse_opt_option *, const struct fuse_opt *);
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/*
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* Public API.
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*
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* The following functions always return 0:
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*
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* int fuse_opt_add_opt(char **, const char *);
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*
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* We implement the next ones:
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*
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* int fuse_opt_add_arg(struct fuse_args *, const char *);
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* void fuse_opt_free_args(struct fuse_args *);
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* int fuse_opt_insert_arg(struct fuse_args *, const char *);
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* int fuse_opt_match(const struct fuse_opt *, const char *);
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* int fuse_opt_parse(struct fuse_args *, void *,
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* const struct fuse_opt *, fuse_opt_proc_t);
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*
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*/
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/* ARGSUSED */
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int
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fuse_opt_add_arg(struct fuse_args *args, const char *arg)
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{
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struct fuse_args *ap;
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if (args->allocated == 0) {
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ap = fuse_opt_deep_copy_args(args->argc, args->argv);
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args->argv = ap->argv;
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args->argc = ap->argc;
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args->allocated = ap->allocated;
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(void) free(ap);
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} else if (args->allocated == args->argc) {
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void *a;
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int na = args->allocated + 10;
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if ((a = realloc(args->argv, na * sizeof(*args->argv))) == NULL)
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return -1;
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args->argv = a;
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args->allocated = na;
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}
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DPRINTF(("%s: arguments passed: [arg:%s]\n", __func__, arg));
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if ((args->argv[args->argc++] = strdup(arg)) == NULL)
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err(1, "fuse_opt_add_arg");
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args->argv[args->argc] = NULL;
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return 0;
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}
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struct fuse_args *
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fuse_opt_deep_copy_args(int argc, char **argv)
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{
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struct fuse_args *ap;
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int i;
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if ((ap = malloc(sizeof(*ap))) == NULL)
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err(1, "_fuse_deep_copy_args");
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/* deep copy args structure into channel args */
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ap->allocated = ((argc / 10) + 1) * 10;
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if ((ap->argv = calloc((size_t)ap->allocated,
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sizeof(*ap->argv))) == NULL)
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err(1, "_fuse_deep_copy_args");
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for (i = 0; i < argc; i++) {
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if ((ap->argv[i] = strdup(argv[i])) == NULL)
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err(1, "_fuse_deep_copy_args");
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}
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ap->argv[ap->argc = i] = NULL;
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return ap;
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}
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void
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fuse_opt_free_args(struct fuse_args *ap)
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{
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int i;
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for (i = 0; i < ap->argc; i++) {
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free(ap->argv[i]);
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}
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free(ap->argv);
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ap->argv = NULL;
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ap->allocated = ap->argc = 0;
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}
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/* ARGSUSED */
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int
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fuse_opt_insert_arg(struct fuse_args *args, int pos, const char *arg)
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{
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int i;
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int na;
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void *a;
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DPRINTF(("%s: arguments passed: [pos=%d] [arg=%s]\n",
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__func__, pos, arg));
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if (args->argv == NULL) {
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na = 10;
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a = malloc(na * sizeof(*args->argv));
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} else {
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na = args->allocated + 10;
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a = realloc(args->argv, na * sizeof(*args->argv));
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}
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if (a == NULL) {
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warn("fuse_opt_insert_arg");
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return -1;
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}
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args->argv = a;
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args->allocated = na;
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for (i = args->argc++; i > pos; --i) {
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args->argv[i] = args->argv[i - 1];
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}
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if ((args->argv[pos] = strdup(arg)) == NULL)
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err(1, "fuse_opt_insert_arg");
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args->argv[args->argc] = NULL;
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return 0;
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}
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/* ARGSUSED */
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int fuse_opt_add_opt(char **opts, const char *opt)
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{
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DPRINTF(("%s: arguments passed: [opts=%s] [opt=%s]\n",
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__func__, *opts, opt));
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return 0;
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}
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/*
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* Returns 0 if opt was matched with any option from opts,
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* otherwise returns 1.
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*/
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int
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fuse_opt_match(const struct fuse_opt *opts, const char *opt)
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{
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while (opts++) {
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if (strcmp(opt, opts->templ) == 0)
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return 0;
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}
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return 1;
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}
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/*
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* Returns 0 if foo->option was matched with any option from opts,
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* and sets the following on match:
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*
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* * foo->key is set to the foo->fop->value if offset == -1.
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* * foo->fop points to the matched struct opts.
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*
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* otherwise returns 1.
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*/
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static int
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fuse_opt_popt(struct fuse_opt_option *foo, const struct fuse_opt *opts)
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{
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int i, found = 0;
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char *match;
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if (!foo->option) {
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(void)fprintf(stderr, "fuse: missing argument after -o\n");
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return 1;
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}
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/*
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* iterate over argv and opts to see
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* if there's a match with any template.
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*/
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for (match = strtok(foo->option, ",");
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match; match = strtok(NULL, ",")) {
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DPRINTF(("%s: specified option='%s'\n", __func__, match));
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found = 0;
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for (i = 0; opts && opts->templ; opts++, i++) {
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DPRINTF(("%s: opts->templ='%s' opts->offset=%d "
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"opts->value=%d\n", __func__, opts->templ,
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opts->offset, opts->value));
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/* option is ok */
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if (strcmp(match, opts->templ) == 0) {
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DPRINTF(("%s: option matched='%s'\n",
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__func__, match));
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found++;
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/*
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* our fop pointer now points
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* to the matched struct opts.
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*/
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foo->fop = opts;
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/*
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* assign default key value, necessary for
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* KEY_HELP, KEY_VERSION and KEY_VERBOSE.
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*/
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if (foo->fop->offset == -1)
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foo->key = foo->fop->value;
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/* reset counter */
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opts -= i;
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break;
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}
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}
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/* invalid option */
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if (!found) {
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(void)fprintf(stderr, "fuse: '%s' is not a "
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"valid option\n", match);
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return 1;
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}
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}
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return 0;
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}
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/* ARGSUSED1 */
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int
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fuse_opt_parse(struct fuse_args *args, void *data,
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const struct fuse_opt *opts, fuse_opt_proc_t proc)
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{
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struct fuse_opt_option foo;
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char *buf;
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int i, rv = 0;
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if (!args || !args->argv || !args->argc || !proc)
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return 0;
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if (args->argc == 1)
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return proc(foo.data, *args->argv, FUSE_OPT_KEY_OPT, args);
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/* the real loop to process the arguments */
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for (i = 1; i < args->argc; i++) {
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/* assign current argv string */
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foo.option = buf = args->argv[i];
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/* argvn != -foo... */
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if (buf[0] != '-') {
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foo.key = FUSE_OPT_KEY_NONOPT;
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rv = proc(foo.data, foo.option, foo.key, args);
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if (rv != 0)
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break;
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/* -o was specified... */
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} else if (buf[0] == '-' && buf[1] == 'o') {
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/* -oblah,foo... */
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if (buf[2]) {
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/* skip -o */
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foo.option = args->argv[i] + 2;
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/* -o blah,foo... */
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} else {
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/*
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* skip current argv and pass to the
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* next one to parse the options.
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*/
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++i;
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foo.option = args->argv[i];
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}
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rv = fuse_opt_popt(&foo, opts);
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if (rv != 0)
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break;
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/* help/version/verbose argument */
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} else if (buf[0] == '-' && buf[1] != 'o') {
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/*
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* check if the argument matches
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* with any template in opts.
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*/
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rv = fuse_opt_popt(&foo, opts);
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if (rv != 0) {
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break;
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} else {
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DPRINTF(("%s: foo.fop->templ='%s' "
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"foo.fop->offset: %d "
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"foo.fop->value: %d\n",
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__func__, foo.fop->templ,
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foo.fop->offset, foo.fop->value));
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/* argument needs to be discarded */
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if (foo.key == FUSE_OPT_KEY_DISCARD) {
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rv = 1;
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break;
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}
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/* process help/version argument */
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if (foo.key != KEY_VERBOSE &&
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foo.key != FUSE_OPT_KEY_KEEP) {
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rv = proc(foo.data, foo.option,
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foo.key, args);
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break;
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} else {
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/* process verbose argument */
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rv = proc(foo.data, foo.option,
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foo.key, args);
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if (rv != 0)
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break;
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}
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}
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/* unknown option, how could that happen? */
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} else {
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DPRINTF(("%s: unknown option\n", __func__));
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rv = 1;
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break;
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}
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}
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return rv;
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}
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