/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2022, 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 (100*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(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!\n",
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(stderr, "PARAM: \"%s\"\n",(param ? param : "(null)"));
#endif
res = getparameter(option, param, &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\n",
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 */
}