mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-12-05 04:11:56 +03:00
306 lines
7.5 KiB
C
306 lines
7.5 KiB
C
/*
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* Copyright 2014 vincent Sanders <vince@netsurf-browser.org>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** \file
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* Table operations for files with posix compliant path separator.
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*/
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#include <stdarg.h>
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#include <string.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include "desktop/gui_internal.h"
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#include "utils/utils.h"
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#include "utils/corestrings.h"
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#include "utils/url.h"
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#include "utils/nsurl.h"
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#include "utils/file.h"
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/**
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* Generate a posix path from one or more component elemnts.
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*
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* If a string is allocated it must be freed by the caller.
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*
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* @param[in,out] str pointer to string pointer if this is NULL enough
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* storage will be allocated for the complete path.
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* @param[in,out] size The size of the space available if \a str not
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* NULL on input and if not NULL set to the total
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* output length on output.
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* @param[in] nelm The number of elements.
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* @param[in] ap The elements of the path as string pointers.
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* @return NSERROR_OK and the complete path is written to str
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* or error code on faliure.
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*/
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static nserror posix_vmkpath(char **str, size_t *size, size_t nelm, va_list ap)
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{
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return vsnstrjoin(str, size, '/', nelm, ap);
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}
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/**
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* Get the basename of a file using posix path handling.
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*
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* This gets the last element of a path and returns it.
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*
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* @param[in] path The path to extract the name from.
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* @param[in,out] str Pointer to string pointer if this is NULL enough
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* storage will be allocated for the path element.
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* @param[in,out] size The size of the space available if \a
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* str not NULL on input and set to the total
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* output length on output.
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* @return NSERROR_OK and the complete path is written to str
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* or error code on faliure.
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*/
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static nserror posix_basename(const char *path, char **str, size_t *size)
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{
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const char *leafname;
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char *fname;
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if (path == NULL) {
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return NSERROR_BAD_PARAMETER;
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}
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leafname = strrchr(path, '/');
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if (!leafname) {
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leafname = path;
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} else {
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leafname += 1;
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}
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fname = strdup(leafname);
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if (fname == NULL) {
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return NSERROR_NOMEM;
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}
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*str = fname;
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if (size != NULL) {
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*size = strlen(fname);
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}
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return NSERROR_OK;
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}
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/**
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* Create a path from a nsurl using posix file handling.
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*
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* @param[in] url The url to encode.
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* @param[out] path_out A string containing the result path which should
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* be freed by the caller.
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* @return NSERROR_OK and the path is written to \a path or error code
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* on faliure.
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*/
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static nserror posix_nsurl_to_path(struct nsurl *url, char **path_out)
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{
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lwc_string *urlpath;
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char *path;
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bool match;
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lwc_string *scheme;
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nserror res;
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if ((url == NULL) || (path_out == NULL)) {
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return NSERROR_BAD_PARAMETER;
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}
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scheme = nsurl_get_component(url, NSURL_SCHEME);
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if (lwc_string_caseless_isequal(scheme, corestring_lwc_file,
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&match) != lwc_error_ok)
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{
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return NSERROR_BAD_PARAMETER;
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}
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lwc_string_unref(scheme);
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if (match == false) {
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return NSERROR_BAD_PARAMETER;
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}
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urlpath = nsurl_get_component(url, NSURL_PATH);
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if (urlpath == NULL) {
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return NSERROR_BAD_PARAMETER;
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}
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res = url_unescape(lwc_string_data(urlpath), &path);
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lwc_string_unref(urlpath);
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if (res != NSERROR_OK) {
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return res;
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}
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*path_out = path;
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return NSERROR_OK;
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}
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/**
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* Create a nsurl from a path using posix file handling.
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*
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* Perform the necessary operations on a path to generate a nsurl.
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*
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* @param[in] path The path to convert.
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* @param[out] url_out pointer to recive the nsurl, The returned url
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* should be unreferenced by the caller.
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* @return NSERROR_OK and the url is placed in \a url or error code on
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* faliure.
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*/
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static nserror posix_path_to_nsurl(const char *path, struct nsurl **url_out)
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{
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nserror ret;
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int urllen;
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char *urlstr;
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char *escpath; /* escaped version of the path */
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char *escpaths;
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if ((path == NULL) || (url_out == NULL) || (*path == 0)) {
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return NSERROR_BAD_PARAMETER;
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}
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/* escape the path so it can be placed in a url */
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ret = url_escape(path, 0, false, "/", &escpath);
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if (ret != NSERROR_OK) {
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return ret;
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}
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/* remove unecessary / as file: paths are already absolute */
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escpaths = escpath;
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while (*escpaths == '/') {
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escpaths++;
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}
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/* build url as a string for nsurl constructor */
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urllen = strlen(escpaths) + FILE_SCHEME_PREFIX_LEN + 1;
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urlstr = malloc(urllen);
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if (urlstr == NULL) {
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free(escpath);
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return NSERROR_NOMEM;
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}
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snprintf(urlstr, urllen, "%s%s", FILE_SCHEME_PREFIX, escpaths);
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free(escpath);
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ret = nsurl_create(urlstr, url_out);
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free(urlstr);
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return ret;
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}
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/**
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* Ensure that all directory elements needed to store a filename exist.
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*
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* @param fname The filename to ensure the path to exists.
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* @return NSERROR_OK on success or error code on failure.
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*/
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static nserror posix_mkdir_all(const char *fname)
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{
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char *dname;
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char *sep;
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struct stat sb;
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dname = strdup(fname);
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sep = strrchr(dname, '/');
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if (sep == NULL) {
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/* no directory separator path is just filename so its ok */
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free(dname);
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return NSERROR_OK;
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}
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*sep = 0; /* null terminate directory path */
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if (stat(dname, &sb) == 0) {
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free(dname);
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if (S_ISDIR(sb.st_mode)) {
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/* path to file exists and is a directory */
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return NSERROR_OK;
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}
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return NSERROR_NOT_DIRECTORY;
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}
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*sep = '/'; /* restore separator */
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sep = dname;
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while (*sep == '/') {
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sep++;
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}
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while ((sep = strchr(sep, '/')) != NULL) {
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*sep = 0;
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if (stat(dname, &sb) != 0) {
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if (nsmkdir(dname, S_IRWXU) != 0) {
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/* could not create path element */
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free(dname);
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return NSERROR_NOT_FOUND;
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}
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} else {
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if (! S_ISDIR(sb.st_mode)) {
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/* path element not a directory */
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free(dname);
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return NSERROR_NOT_DIRECTORY;
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}
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}
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*sep = '/'; /* restore separator */
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/* skip directory separators */
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while (*sep == '/') {
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sep++;
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}
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}
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free(dname);
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return NSERROR_OK;
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}
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/**
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* default to using the posix file handling
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*/
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static struct gui_file_table file_table = {
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.mkpath = posix_vmkpath,
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.basename = posix_basename,
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.nsurl_to_path = posix_nsurl_to_path,
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.path_to_nsurl = posix_path_to_nsurl,
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.mkdir_all = posix_mkdir_all,
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};
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struct gui_file_table *default_file_table = &file_table;
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/* exported interface documented in utils/file.h */
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nserror netsurf_mkpath(char **str, size_t *size, size_t nelm, ...)
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{
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va_list ap;
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nserror ret;
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va_start(ap, nelm);
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ret = guit->file->mkpath(str, size, nelm, ap);
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va_end(ap);
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return ret;
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}
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/* exported interface documented in utils/file.h */
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nserror netsurf_nsurl_to_path(struct nsurl *url, char **path_out)
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{
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return guit->file->nsurl_to_path(url, path_out);
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}
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/* exported interface documented in utils/file.h */
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nserror netsurf_path_to_nsurl(const char *path, struct nsurl **url)
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{
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return guit->file->path_to_nsurl(path, url);
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}
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/* exported interface documented in utils/file.h */
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nserror netsurf_mkdir_all(const char *fname)
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{
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return guit->file->mkdir_all(fname);
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}
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