diff options
Diffstat (limited to 'lib/curl_path.c')
| -rw-r--r-- | lib/curl_path.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/lib/curl_path.c b/lib/curl_path.c new file mode 100644 index 0000000..e843dea --- /dev/null +++ b/lib/curl_path.c @@ -0,0 +1,195 @@ +/*************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al. + * + * This software is licensed as described in the file COPYING, which + * you should have received as part of this distribution. The terms + * are also available at https://curl.haxx.se/docs/copyright.html. + * + * You may opt to use, copy, modify, merge, publish, distribute and/or sell + * copies of the Software, and permit persons to whom the Software is + * furnished to do so, under the terms of the COPYING file. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ***************************************************************************/ + +#include "curl_setup.h" + +#include <curl/curl.h> +#include "curl_memory.h" +#include "curl_path.h" +#include "escape.h" +#include "memdebug.h" + +/* figure out the path to work with in this particular request */ +CURLcode Curl_getworkingpath(struct connectdata *conn, + char *homedir, /* when SFTP is used */ + char **path) /* returns the allocated + real path to work with */ +{ + struct Curl_easy *data = conn->data; + char *real_path = NULL; + char *working_path; + size_t working_path_len; + CURLcode result = + Curl_urldecode(data, data->state.path, 0, &working_path, + &working_path_len, FALSE); + if(result) + return result; + + /* Check for /~/, indicating relative to the user's home directory */ + if(conn->handler->protocol & CURLPROTO_SCP) { + real_path = malloc(working_path_len + 1); + if(real_path == NULL) { + free(working_path); + return CURLE_OUT_OF_MEMORY; + } + if((working_path_len > 3) && (!memcmp(working_path, "/~/", 3))) + /* It is referenced to the home directory, so strip the leading '/~/' */ + memcpy(real_path, working_path + 3, 4 + working_path_len-3); + else + memcpy(real_path, working_path, 1 + working_path_len); + } + else if(conn->handler->protocol & CURLPROTO_SFTP) { + if((working_path_len > 1) && (working_path[1] == '~')) { + size_t homelen = strlen(homedir); + real_path = malloc(homelen + working_path_len + 1); + if(real_path == NULL) { + free(working_path); + return CURLE_OUT_OF_MEMORY; + } + /* It is referenced to the home directory, so strip the + leading '/' */ + memcpy(real_path, homedir, homelen); + real_path[homelen] = '/'; + real_path[homelen + 1] = '\0'; + if(working_path_len > 3) { + memcpy(real_path + homelen + 1, working_path + 3, + 1 + working_path_len -3); + } + } + else { + real_path = malloc(working_path_len + 1); + if(real_path == NULL) { + free(working_path); + return CURLE_OUT_OF_MEMORY; + } + memcpy(real_path, working_path, 1 + working_path_len); + } + } + + free(working_path); + + /* store the pointer for the caller to receive */ + *path = real_path; + + return CURLE_OK; +} + +/* The get_pathname() function is being borrowed from OpenSSH sftp.c + version 4.6p1. */ +/* + * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ +CURLcode Curl_get_pathname(const char **cpp, char **path, char *homedir) +{ + const char *cp = *cpp, *end; + char quot; + unsigned int i, j; + size_t fullPathLength, pathLength; + bool relativePath = false; + static const char WHITESPACE[] = " \t\r\n"; + + if(!*cp) { + *cpp = NULL; + *path = NULL; + return CURLE_QUOTE_ERROR; + } + /* Ignore leading whitespace */ + cp += strspn(cp, WHITESPACE); + /* Allocate enough space for home directory and filename + separator */ + fullPathLength = strlen(cp) + strlen(homedir) + 2; + *path = malloc(fullPathLength); + if(*path == NULL) + return CURLE_OUT_OF_MEMORY; + + /* Check for quoted filenames */ + if(*cp == '\"' || *cp == '\'') { + quot = *cp++; + + /* Search for terminating quote, unescape some chars */ + for(i = j = 0; i <= strlen(cp); i++) { + if(cp[i] == quot) { /* Found quote */ + i++; + (*path)[j] = '\0'; + break; + } + if(cp[i] == '\0') { /* End of string */ + /*error("Unterminated quote");*/ + goto fail; + } + if(cp[i] == '\\') { /* Escaped characters */ + i++; + if(cp[i] != '\'' && cp[i] != '\"' && + cp[i] != '\\') { + /*error("Bad escaped character '\\%c'", + cp[i]);*/ + goto fail; + } + } + (*path)[j++] = cp[i]; + } + + if(j == 0) { + /*error("Empty quotes");*/ + goto fail; + } + *cpp = cp + i + strspn(cp + i, WHITESPACE); + } + else { + /* Read to end of filename - either to white space or terminator */ + end = strpbrk(cp, WHITESPACE); + if(end == NULL) + end = strchr(cp, '\0'); + /* return pointer to second parameter if it exists */ + *cpp = end + strspn(end, WHITESPACE); + pathLength = 0; + relativePath = (cp[0] == '/' && cp[1] == '~' && cp[2] == '/'); + /* Handling for relative path - prepend home directory */ + if(relativePath) { + strcpy(*path, homedir); + pathLength = strlen(homedir); + (*path)[pathLength++] = '/'; + (*path)[pathLength] = '\0'; + cp += 3; + } + /* Copy path name up until first "white space" */ + memcpy(&(*path)[pathLength], cp, (int)(end - cp)); + pathLength += (int)(end - cp); + (*path)[pathLength] = '\0'; + } + return CURLE_OK; + + fail: + Curl_safefree(*path); + return CURLE_QUOTE_ERROR; +} |