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- /***************************************************************************
- * _ _ ____ _
- * Project ___| | | | _ \| |
- * / __| | | | |_) | |
- * | (__| |_| | _ <| |___
- * \___|\___/|_| \_\_____|
- *
- * Copyright (C) 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.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.
- *
- * SPDX-License-Identifier: curl
- *
- ***************************************************************************/
- #include "tool_setup.h"
- #define ENABLE_CURLX_PRINTF
- /* use our own printf() functions */
- #include "curlx.h"
- #include "tool_cfgable.h"
- #include "tool_getparam.h"
- #include "tool_helpers.h"
- #include "tool_findfile.h"
- #include "tool_msgs.h"
- #include "tool_parsecfg.h"
- #include "dynbuf.h"
- #include "memdebug.h" /* keep this as LAST include */
- /* only acknowledge colon or equals as separators if the option was not
- specified with an initial dash! */
- #define ISSEP(x,dash) (!dash && (((x) == '=') || ((x) == ':')))
- static const char *unslashquote(const char *line, char *param);
- #define MAX_CONFIG_LINE_LENGTH (10*1024*1024)
- static bool my_get_line(FILE *fp, struct curlx_dynbuf *, bool *error);
- #ifdef WIN32
- static FILE *execpath(const char *filename, char **pathp)
- {
- static char filebuffer[512];
- /* Get the filename of our executable. GetModuleFileName is already declared
- * via inclusions done in setup header file. We assume that we are using
- * the ASCII version here.
- */
- unsigned long len = GetModuleFileNameA(0, filebuffer, sizeof(filebuffer));
- if(len > 0 && len < sizeof(filebuffer)) {
- /* We got a valid filename - get the directory part */
- char *lastdirchar = strrchr(filebuffer, '\\');
- if(lastdirchar) {
- size_t remaining;
- *lastdirchar = 0;
- /* If we have enough space, build the RC filename */
- remaining = sizeof(filebuffer) - strlen(filebuffer);
- if(strlen(filename) < remaining - 1) {
- FILE *f;
- msnprintf(lastdirchar, remaining, "%s%s", DIR_CHAR, filename);
- *pathp = filebuffer;
- f = fopen(filebuffer, FOPEN_READTEXT);
- return f;
- }
- }
- }
- return NULL;
- }
- #endif
- /* return 0 on everything-is-fine, and non-zero otherwise */
- int parseconfig(const char *filename, struct GlobalConfig *global)
- {
- FILE *file = NULL;
- bool usedarg = FALSE;
- int rc = 0;
- struct OperationConfig *operation = global->last;
- char *pathalloc = NULL;
- if(!filename) {
- /* NULL means load .curlrc from homedir! */
- char *curlrc = findfile(".curlrc", CURLRC_DOTSCORE);
- if(curlrc) {
- file = fopen(curlrc, FOPEN_READTEXT);
- if(!file) {
- free(curlrc);
- return 1;
- }
- filename = pathalloc = curlrc;
- }
- #ifdef WIN32 /* Windows */
- else {
- char *fullp;
- /* check for .curlrc then _curlrc in the dir of the executable */
- file = execpath(".curlrc", &fullp);
- if(!file)
- file = execpath("_curlrc", &fullp);
- if(file)
- /* this is the filename we read from */
- filename = fullp;
- }
- #endif
- }
- else {
- if(strcmp(filename, "-"))
- file = fopen(filename, FOPEN_READTEXT);
- else
- file = stdin;
- }
- if(file) {
- char *line;
- char *option;
- char *param;
- int lineno = 0;
- bool dashed_option;
- struct curlx_dynbuf buf;
- bool fileerror;
- curlx_dyn_init(&buf, MAX_CONFIG_LINE_LENGTH);
- DEBUGASSERT(filename);
- while(my_get_line(file, &buf, &fileerror)) {
- int res;
- bool alloced_param = FALSE;
- lineno++;
- line = curlx_dyn_ptr(&buf);
- if(!line) {
- rc = 1; /* out of memory */
- break;
- }
- /* line with # in the first non-blank column is a comment! */
- while(*line && ISSPACE(*line))
- line++;
- switch(*line) {
- case '#':
- case '/':
- case '\r':
- case '\n':
- case '*':
- case '\0':
- curlx_dyn_reset(&buf);
- continue;
- }
- /* the option keywords starts here */
- option = line;
- /* the option starts with a dash? */
- dashed_option = option[0]=='-'?TRUE:FALSE;
- while(*line && !ISSPACE(*line) && !ISSEP(*line, dashed_option))
- line++;
- /* ... and has ended here */
- if(*line)
- *line++ = '\0'; /* null-terminate, we have a local copy of the data */
- #ifdef DEBUG_CONFIG
- fprintf(tool_stderr, "GOT: %s\n", option);
- #endif
- /* pass spaces and separator(s) */
- while(*line && (ISSPACE(*line) || ISSEP(*line, dashed_option)))
- line++;
- /* the parameter starts here (unless quoted) */
- if(*line == '\"') {
- /* quoted parameter, do the quote dance */
- line++;
- param = malloc(strlen(line) + 1); /* parameter */
- if(!param) {
- /* out of memory */
- rc = 1;
- break;
- }
- alloced_param = TRUE;
- (void)unslashquote(line, param);
- }
- else {
- param = line; /* parameter starts here */
- while(*line && !ISSPACE(*line))
- line++;
- if(*line) {
- *line = '\0'; /* null-terminate */
- /* to detect mistakes better, see if there's data following */
- line++;
- /* pass all spaces */
- while(*line && ISSPACE(*line))
- line++;
- switch(*line) {
- case '\0':
- case '\r':
- case '\n':
- case '#': /* comment */
- break;
- default:
- warnf(operation->global, "%s:%d: warning: '%s' uses unquoted "
- "whitespace in the line that may cause side-effects",
- filename, lineno, option);
- }
- }
- if(!*param)
- /* do this so getparameter can check for required parameters.
- Otherwise it always thinks there's a parameter. */
- param = NULL;
- }
- #ifdef DEBUG_CONFIG
- fprintf(tool_stderr, "PARAM: \"%s\"\n",(param ? param : "(null)"));
- #endif
- res = getparameter(option, param, NULL, &usedarg, global, operation);
- operation = global->last;
- if(!res && param && *param && !usedarg)
- /* we passed in a parameter that wasn't used! */
- res = PARAM_GOT_EXTRA_PARAMETER;
- if(res == PARAM_NEXT_OPERATION) {
- if(operation->url_list && operation->url_list->url) {
- /* Allocate the next config */
- operation->next = malloc(sizeof(struct OperationConfig));
- if(operation->next) {
- /* Initialise the newly created config */
- config_init(operation->next);
- /* Set the global config pointer */
- operation->next->global = global;
- /* Update the last operation pointer */
- global->last = operation->next;
- /* Move onto the new config */
- operation->next->prev = operation;
- operation = operation->next;
- }
- else
- res = PARAM_NO_MEM;
- }
- }
- if(res != PARAM_OK && res != PARAM_NEXT_OPERATION) {
- /* the help request isn't really an error */
- if(!strcmp(filename, "-")) {
- filename = "<stdin>";
- }
- if(res != PARAM_HELP_REQUESTED &&
- res != PARAM_MANUAL_REQUESTED &&
- res != PARAM_VERSION_INFO_REQUESTED &&
- res != PARAM_ENGINES_REQUESTED) {
- const char *reason = param2text(res);
- warnf(operation->global, "%s:%d: warning: '%s' %s",
- filename, lineno, option, reason);
- }
- }
- if(alloced_param)
- Curl_safefree(param);
- curlx_dyn_reset(&buf);
- }
- curlx_dyn_free(&buf);
- if(file != stdin)
- fclose(file);
- if(fileerror)
- rc = 1;
- }
- else
- rc = 1; /* couldn't open the file */
- free(pathalloc);
- return rc;
- }
- /*
- * Copies the string from line to the buffer at param, unquoting
- * backslash-quoted characters and NUL-terminating the output string.
- * Stops at the first non-backslash-quoted double quote character or the
- * end of the input string. param must be at least as long as the input
- * string. Returns the pointer after the last handled input character.
- */
- static const char *unslashquote(const char *line, char *param)
- {
- while(*line && (*line != '\"')) {
- if(*line == '\\') {
- char out;
- line++;
- /* default is to output the letter after the backslash */
- switch(out = *line) {
- case '\0':
- continue; /* this'll break out of the loop */
- case 't':
- out = '\t';
- break;
- case 'n':
- out = '\n';
- break;
- case 'r':
- out = '\r';
- break;
- case 'v':
- out = '\v';
- break;
- }
- *param++ = out;
- line++;
- }
- else
- *param++ = *line++;
- }
- *param = '\0'; /* always null-terminate */
- return line;
- }
- /*
- * Reads a line from the given file, ensuring is NUL terminated.
- */
- static bool my_get_line(FILE *fp, struct curlx_dynbuf *db,
- bool *error)
- {
- char buf[4096];
- *error = FALSE;
- do {
- /* fgets() returns s on success, and NULL on error or when end of file
- occurs while no characters have been read. */
- if(!fgets(buf, sizeof(buf), fp))
- /* only if there's data in the line, return TRUE */
- return curlx_dyn_len(db) ? TRUE : FALSE;
- if(curlx_dyn_add(db, buf)) {
- *error = TRUE; /* error */
- return FALSE; /* stop reading */
- }
- } while(!strchr(buf, '\n'));
- return TRUE; /* continue */
- }
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