352 lines
9.8 KiB
C
352 lines
9.8 KiB
C
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "tool_setup.h"
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#define ENABLE_CURLX_PRINTF
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/* use our own printf() functions */
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#include "curlx.h"
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#include "tool_cfgable.h"
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#include "tool_getparam.h"
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#include "tool_helpers.h"
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#include "tool_findfile.h"
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#include "tool_msgs.h"
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#include "tool_parsecfg.h"
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#include "dynbuf.h"
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#include "memdebug.h" /* keep this as LAST include */
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/* only acknowledge colon or equals as separators if the option was not
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specified with an initial dash! */
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#define ISSEP(x,dash) (!dash && (((x) == '=') || ((x) == ':')))
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static const char *unslashquote(const char *line, char *param);
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#define MAX_CONFIG_LINE_LENGTH (10*1024*1024)
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static bool my_get_line(FILE *fp, struct curlx_dynbuf *, bool *error);
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#ifdef WIN32
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static FILE *execpath(const char *filename, char **pathp)
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{
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static char filebuffer[512];
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/* Get the filename of our executable. GetModuleFileName is already declared
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* via inclusions done in setup header file. We assume that we are using
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* the ASCII version here.
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*/
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unsigned long len = GetModuleFileNameA(0, filebuffer, sizeof(filebuffer));
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if(len > 0 && len < sizeof(filebuffer)) {
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/* We got a valid filename - get the directory part */
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char *lastdirchar = strrchr(filebuffer, '\\');
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if(lastdirchar) {
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size_t remaining;
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*lastdirchar = 0;
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/* If we have enough space, build the RC filename */
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remaining = sizeof(filebuffer) - strlen(filebuffer);
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if(strlen(filename) < remaining - 1) {
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FILE *f;
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msnprintf(lastdirchar, remaining, "%s%s", DIR_CHAR, filename);
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*pathp = filebuffer;
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f = fopen(filebuffer, FOPEN_READTEXT);
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return f;
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}
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}
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}
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return NULL;
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}
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#endif
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/* return 0 on everything-is-fine, and non-zero otherwise */
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int parseconfig(const char *filename, struct GlobalConfig *global)
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{
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FILE *file = NULL;
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bool usedarg = FALSE;
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int rc = 0;
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struct OperationConfig *operation = global->last;
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char *pathalloc = NULL;
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if(!filename) {
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/* NULL means load .curlrc from homedir! */
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char *curlrc = findfile(".curlrc", CURLRC_DOTSCORE);
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if(curlrc) {
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file = fopen(curlrc, FOPEN_READTEXT);
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if(!file) {
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free(curlrc);
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return 1;
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}
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filename = pathalloc = curlrc;
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}
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#ifdef WIN32 /* Windows */
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else {
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char *fullp;
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/* check for .curlrc then _curlrc in the dir of the executable */
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file = execpath(".curlrc", &fullp);
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if(!file)
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file = execpath("_curlrc", &fullp);
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if(file)
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/* this is the filename we read from */
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filename = fullp;
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}
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#endif
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}
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else {
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if(strcmp(filename, "-"))
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file = fopen(filename, FOPEN_READTEXT);
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else
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file = stdin;
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}
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if(file) {
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char *line;
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char *option;
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char *param;
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int lineno = 0;
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bool dashed_option;
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struct curlx_dynbuf buf;
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bool fileerror;
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curlx_dyn_init(&buf, MAX_CONFIG_LINE_LENGTH);
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DEBUGASSERT(filename);
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while(my_get_line(file, &buf, &fileerror)) {
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int res;
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bool alloced_param = FALSE;
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lineno++;
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line = curlx_dyn_ptr(&buf);
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if(!line) {
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rc = 1; /* out of memory */
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break;
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}
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/* line with # in the first non-blank column is a comment! */
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while(*line && ISSPACE(*line))
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line++;
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switch(*line) {
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case '#':
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case '/':
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case '\r':
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case '\n':
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case '*':
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case '\0':
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curlx_dyn_reset(&buf);
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continue;
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}
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/* the option keywords starts here */
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option = line;
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/* the option starts with a dash? */
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dashed_option = option[0]=='-'?TRUE:FALSE;
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while(*line && !ISSPACE(*line) && !ISSEP(*line, dashed_option))
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line++;
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/* ... and has ended here */
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if(*line)
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*line++ = '\0'; /* null-terminate, we have a local copy of the data */
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#ifdef DEBUG_CONFIG
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fprintf(stderr, "GOT: %s\n", option);
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#endif
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/* pass spaces and separator(s) */
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while(*line && (ISSPACE(*line) || ISSEP(*line, dashed_option)))
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line++;
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/* the parameter starts here (unless quoted) */
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if(*line == '\"') {
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/* quoted parameter, do the quote dance */
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line++;
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param = malloc(strlen(line) + 1); /* parameter */
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if(!param) {
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/* out of memory */
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rc = 1;
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break;
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}
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alloced_param = TRUE;
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(void)unslashquote(line, param);
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}
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else {
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param = line; /* parameter starts here */
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while(*line && !ISSPACE(*line))
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line++;
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if(*line) {
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*line = '\0'; /* null-terminate */
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/* to detect mistakes better, see if there's data following */
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line++;
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/* pass all spaces */
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while(*line && ISSPACE(*line))
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line++;
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switch(*line) {
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case '\0':
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case '\r':
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case '\n':
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case '#': /* comment */
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break;
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default:
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warnf(operation->global, "%s:%d: warning: '%s' uses unquoted "
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"whitespace in the line that may cause side-effects",
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filename, lineno, option);
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}
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}
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if(!*param)
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/* do this so getparameter can check for required parameters.
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Otherwise it always thinks there's a parameter. */
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param = NULL;
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}
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#ifdef DEBUG_CONFIG
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fprintf(stderr, "PARAM: \"%s\"\n",(param ? param : "(null)"));
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#endif
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res = getparameter(option, param, NULL, &usedarg, global, operation);
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operation = global->last;
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if(!res && param && *param && !usedarg)
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/* we passed in a parameter that wasn't used! */
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res = PARAM_GOT_EXTRA_PARAMETER;
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if(res == PARAM_NEXT_OPERATION) {
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if(operation->url_list && operation->url_list->url) {
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/* Allocate the next config */
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operation->next = malloc(sizeof(struct OperationConfig));
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if(operation->next) {
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/* Initialise the newly created config */
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config_init(operation->next);
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/* Set the global config pointer */
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operation->next->global = global;
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/* Update the last operation pointer */
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global->last = operation->next;
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/* Move onto the new config */
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operation->next->prev = operation;
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operation = operation->next;
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}
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else
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res = PARAM_NO_MEM;
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}
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}
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if(res != PARAM_OK && res != PARAM_NEXT_OPERATION) {
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/* the help request isn't really an error */
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if(!strcmp(filename, "-")) {
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filename = "<stdin>";
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}
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if(res != PARAM_HELP_REQUESTED &&
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res != PARAM_MANUAL_REQUESTED &&
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res != PARAM_VERSION_INFO_REQUESTED &&
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res != PARAM_ENGINES_REQUESTED) {
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const char *reason = param2text(res);
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warnf(operation->global, "%s:%d: warning: '%s' %s",
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filename, lineno, option, reason);
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}
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}
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if(alloced_param)
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Curl_safefree(param);
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curlx_dyn_reset(&buf);
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}
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curlx_dyn_free(&buf);
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if(file != stdin)
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fclose(file);
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if(fileerror)
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rc = 1;
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}
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else
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rc = 1; /* couldn't open the file */
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free(pathalloc);
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return rc;
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}
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/*
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* Copies the string from line to the buffer at param, unquoting
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* backslash-quoted characters and NUL-terminating the output string.
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* Stops at the first non-backslash-quoted double quote character or the
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* end of the input string. param must be at least as long as the input
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* string. Returns the pointer after the last handled input character.
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*/
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static const char *unslashquote(const char *line, char *param)
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{
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while(*line && (*line != '\"')) {
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if(*line == '\\') {
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char out;
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line++;
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/* default is to output the letter after the backslash */
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switch(out = *line) {
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case '\0':
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continue; /* this'll break out of the loop */
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case 't':
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out = '\t';
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break;
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case 'n':
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out = '\n';
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break;
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case 'r':
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out = '\r';
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break;
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case 'v':
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out = '\v';
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break;
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}
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*param++ = out;
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line++;
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}
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else
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*param++ = *line++;
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}
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*param = '\0'; /* always null-terminate */
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return line;
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}
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/*
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* Reads a line from the given file, ensuring is NUL terminated.
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*/
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static bool my_get_line(FILE *fp, struct curlx_dynbuf *db,
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bool *error)
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{
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char buf[4096];
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*error = FALSE;
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do {
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/* fgets() returns s on success, and NULL on error or when end of file
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occurs while no characters have been read. */
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if(!fgets(buf, sizeof(buf), fp))
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/* only if there's data in the line, return TRUE */
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return curlx_dyn_len(db) ? TRUE : FALSE;
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if(curlx_dyn_add(db, buf)) {
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*error = TRUE; /* error */
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return FALSE; /* stop reading */
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}
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} while(!strchr(buf, '\n'));
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return TRUE; /* continue */
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}
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