/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2013, 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 http://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 "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_homedir.h"
#include "tool_msgs.h"
#include "tool_parsecfg.h"
#include "memdebug.h" /* keep this as LAST include */
#define CURLRC DOT_CHAR "curlrc"
/* 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);
static char *my_get_line(FILE *fp);
/* return 0 on everything-is-fine, and non-zero otherwise */
int parseconfig(const char *filename,
struct Configurable *config)
{
int res;
FILE *file;
char filebuffer[512];
bool usedarg;
char *home;
int rc = 0;
if(!filename || !*filename) {
/* NULL or no file name attempts to load .curlrc from the homedir! */
#ifndef __AMIGA__
filename = CURLRC; /* sensible default */
home = homedir(); /* portable homedir finder */
if(home) {
if(strlen(home) < (sizeof(filebuffer) - strlen(CURLRC))) {
snprintf(filebuffer, sizeof(filebuffer),
"%s%s%s", home, DIR_CHAR, CURLRC);
#ifdef WIN32
/* Check if the file exists - if not, try CURLRC in the same
* directory as our executable
*/
file = fopen(filebuffer, "r");
if(file != NULL) {
fclose(file);
filename = filebuffer;
}
else {
/* 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.
*/
int n = GetModuleFileName(0, filebuffer, sizeof(filebuffer));
if(n > 0 && n < (int)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(CURLRC) < remaining - 1) {
snprintf(lastdirchar, remaining,
"%s%s", DIR_CHAR, CURLRC);
/* Don't bother checking if it exists - we do
* that later
*/
filename = filebuffer;
}
}
}
}
#else /* WIN32 */
filename = filebuffer;
#endif /* WIN32 */
}
Curl_safefree(home); /* we've used it, now free it */
}
# else /* __AMIGA__ */
/* On AmigaOS all the config files are into env:
*/
filename = "ENV:" CURLRC;
#endif
}
if(strcmp(filename,"-"))
file = fopen(filename, "r");
else
file = stdin;
if(file) {
char *line;
char *aline;
char *option;
char *param;
int lineno = 0;
bool alloced_param;
bool dashed_option;
while(NULL != (aline = my_get_line(file))) {
lineno++;
line = aline;
alloced_param=FALSE;
/* 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':
Curl_safefree(aline);
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'; /* zero terminate, we have a local copy of the data */
#ifdef DEBUG_CONFIG
fprintf(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 */
Curl_safefree(aline);
rc = 1;
break;
}
alloced_param = TRUE;
(void)unslashquote(line, param);
}
else {
param = line; /* parameter starts here */
while(*line && !ISSPACE(*line))
line++;
*line = '\0'; /* zero 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(config, "%s:%d: warning: '%s' uses unquoted white space in the"
" line that may cause side-effects!\n",
filename, lineno, option);
}
}
if(param && !*param) {
/* do this so getparameter can check for required parameters.
Otherwise it always thinks there's a parameter. */
if(alloced_param)
Curl_safefree(param);
param = NULL;
}
#ifdef DEBUG_CONFIG
fprintf(stderr, "PARAM: \"%s\"\n",(param ? param : "(null)"));
#endif
res = getparameter(option, param, &usedarg, config);
if(param && *param && !usedarg)
/* we passed in a parameter that wasn't used! */
res = PARAM_GOT_EXTRA_PARAMETER;
if(res != PARAM_OK) {
/* the help request isn't really an error */
if(!strcmp(filename, "-")) {
filename = (char *)"<stdin>";
}
if(PARAM_HELP_REQUESTED != res) {
const char *reason = param2text(res);
warnf(config, "%s:%d: warning: '%s' %s\n",
filename, lineno, option, reason);
}
}
if(alloced_param)
Curl_safefree(param);
Curl_safefree(aline);
}
if(file != stdin)
fclose(file);
}
else
rc = 1; /* couldn't open the file */
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 zero terminate */
return line;
}
/*
* Reads a line from the given file, ensuring is NUL terminated.
* The pointer must be freed by the caller.
* NULL is returned on an out of memory condition.
*/
static char *my_get_line(FILE *fp)
{
char buf[4096];
char *nl = NULL;
char *line = NULL;
do {
if(NULL == fgets(buf, sizeof(buf), fp))
break;
if(!line) {
line = strdup(buf);
if(!line)
return NULL;
}
else {
char *ptr;
size_t linelen = strlen(line);
ptr = realloc(line, linelen + strlen(buf) + 1);
if(!ptr) {
Curl_safefree(line);
return NULL;
}
line = ptr;
strcpy(&line[linelen], buf);
}
nl = strchr(line, '\n');
} while(!nl);
if(nl)
*nl = '\0';
return line;
}
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