337 lines
8.3 KiB
C
337 lines
8.3 KiB
C
/* $NetBSD: refuse_opt.c,v 1.9 2007/04/17 06:34:48 agc 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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* 3. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without
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* specific prior written permission.
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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 "defs.h"
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#include "fuse.h"
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#include "fuse_opt.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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/* function to perform a deep copy of the args structure */
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static struct fuse_args *
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deep_copy_args(int argc, char **argv)
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{
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struct fuse_args *ap;
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NEW(struct fuse_args, ap, "deep_copy_args", return NULL);
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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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NEWARRAY(char *, ap->argv, ap->allocated, "fuse_mount", return NULL);
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for (ap->argc = 0 ; ap->argc < argc ; ap->argc++) {
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ap->argv[ap->argc] = strdup(argv[ap->argc]);
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}
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return ap;
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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 = 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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args->allocated += 10;
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RENEW(char *, args->argv, args->allocated,
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"fuse_opt_add_arg", return -1);
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}
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DPRINTF(("%s: arguments passed: [arg:%s]\n", __func__, arg));
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args->argv[args->argc++] = strdup(arg);
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return 0;
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}
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/* ARGSUSED */
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void
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fuse_opt_free_args(struct fuse_args *args)
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{
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int i;
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for (i = 0 ; i < args->argc ; i++) {
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FREE(args->argv[i]);
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}
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FREE(args->argv);
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args->allocated = args->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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DPRINTF(("%s: arguments passed: [pos=%d] [arg=%s]\n",
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__func__, pos, arg));
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ALLOC(char *, args->argv, args->allocated, args->argc, 10, 10,
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"fuse_opt_insert_org", return -1);
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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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args->argv[pos] = strdup(arg);
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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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