cgit/configfile.c

112 lines
2.0 KiB
C

/* configfile.c: parsing of config files
*
* Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
*
* Licensed under GNU General Public License v2
* (see COPYING for full license text)
*/
#include <git-compat-util.h>
#include "configfile.h"
#define CONFIG_GENERATOR_EXEC "/srv/etc/cgit-config-gen"
static int next_char(FILE *f)
{
int c = fgetc(f);
if (c == '\r') {
c = fgetc(f);
if (c != '\n') {
ungetc(c, f);
c = '\r';
}
}
return c;
}
static void skip_line(FILE *f)
{
int c;
while ((c = next_char(f)) && c != '\n' && c != EOF)
;
}
static int read_config_line(FILE *f, struct strbuf *name, struct strbuf *value)
{
int c = next_char(f);
strbuf_reset(name);
strbuf_reset(value);
/* Skip comments and preceding spaces. */
for(;;) {
if (c == EOF)
return 0;
else if (c == '#' || c == ';')
skip_line(f);
else if (!isspace(c))
break;
c = next_char(f);
}
/* Read variable name. */
while (c != '=') {
if (c == '\n' || c == EOF)
return 0;
strbuf_addch(name, c);
c = next_char(f);
}
/* Read variable value. */
c = next_char(f);
while (c != '\n' && c != EOF) {
strbuf_addch(value, c);
c = next_char(f);
}
return 1;
}
void gen_config(FILE *f){
pid_t cmdGenPid=fork();
if (cmdGenPid==0) { /* child process */
char * const theArgv[] = {CONFIG_GENERATOR_EXEC};
close(1);
dup(fileno(f));
execve(CONFIG_GENERATOR_EXEC, theArgv, (char *const []){NULL}); // Pas d'environement
exit(127); /* only if execv fails */
}
else { /* pid!=0; parent process */
waitpid(cmdGenPid,0,0); /* wait for child to exit */
}
}
int parse_configfile(const char *filename, configfile_value_fn fn)
{
static int nesting;
struct strbuf name = STRBUF_INIT;
struct strbuf value = STRBUF_INIT;
FILE *f;
/* cancel deeply nested include-commands */
if (nesting > 8)
return -1;
if (!(f = tmpfile()))
return -1;
gen_config(f);
rewind(f);
nesting++;
while (read_config_line(f, &name, &value))
fn(name.buf, value.buf);
nesting--;
fclose(f);
strbuf_release(&name);
strbuf_release(&value);
return 0;
}