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/*
* Copyright © 2011 Intel Corporation
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#define _GNU_SOURCE /* for stchrnul() */
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <ctype.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "config-parser.h"
static int
handle_key(const struct config_key *key, const char *value)
{
char *end, *s;
int i, len;
unsigned int ui;
switch (key->type) {
case CONFIG_KEY_INTEGER:
i = strtol(value, &end, 0);
if (*end != '\n') {
fprintf(stderr, "invalid integer: %s\n", value);
return -1;
}
*(int *)key->data = i;
return 0;
case CONFIG_KEY_UNSIGNED_INTEGER:
ui = strtoul(value, &end, 0);
if (*end != '\n') {
fprintf(stderr, "invalid integer: %s\n", value);
return -1;
}
*(unsigned int *)key->data = ui;
return 0;
case CONFIG_KEY_STRING:
len = strlen(value);
while (len > 0 && isspace(value[len - 1]))
len--;
s = malloc(len + 1);
if (s == NULL)
return -1;
memcpy(s, value, len);
s[len] = '\0';
*(char **)key->data = s;
return 0;
case CONFIG_KEY_BOOLEAN:
if (strcmp(value, "false\n") == 0)
*(int *)key->data = 0;
else if (strcmp(value, "true\n") == 0)
*(int *)key->data = 1;
else {
fprintf(stderr, "invalid bool: %s\n", value);
return -1;
}
return 0;
default:
assert(0);
break;
}
return -1;
}
int
parse_config_file(int fd,
const struct config_section *sections, int num_sections,
void *data)
{
FILE *fp;
char line[512], *p;
const struct config_section *current = NULL;
int i;
if (fd == -1)
return -1;
fp = fdopen(dup(fd), "r");
if (fp == NULL) {
perror("couldn't open config file");
return -1;
}
rewind(fp);
while (fgets(line, sizeof line, fp)) {
if (line[0] == '#' || line[0] == '\n') {
continue;
} if (line[0] == '[') {
p = strchr(&line[1], ']');
if (!p || p[1] != '\n') {
fprintf(stderr, "malformed "
"section header: %s\n", line);
fclose(fp);
return -1;
}
if (current && current->done)
current->done(data);
p[0] = '\0';
for (i = 0; i < num_sections; i++) {
if (strcmp(sections[i].name, &line[1]) == 0) {
current = §ions[i];
break;
}
}
if (i == num_sections)
current = NULL;
} else if (p = strchr(line, '='), p != NULL) {
if (current == NULL)
continue;
p[0] = '\0';
for (i = 0; i < current->num_keys; i++) {
if (strcmp(current->keys[i].name, line) == 0) {
if (handle_key(¤t->keys[i], &p[1]) < 0) {
fclose(fp);
return -1;
}
break;
}
}
} else {
fprintf(stderr, "malformed config line: %s\n", line);
fclose(fp);
return -1;
}
}
if (current && current->done)
current->done(data);
fclose(fp);
return 0;
}
int
open_config_file(const char *name)
{
const char *config_dir = getenv("XDG_CONFIG_HOME");
const char *home_dir = getenv("HOME");
const char *config_dirs = getenv("XDG_CONFIG_DIRS");
char path[PATH_MAX];
const char *p, *next;
int fd;
/* Precedence is given to config files in the home directory,
* and then to directories listed in XDG_CONFIG_DIRS and
* finally to the current working directory. */
/* $XDG_CONFIG_HOME */
if (config_dir) {
snprintf(path, sizeof path, "%s/%s", config_dir, name);
fd = open(path, O_RDONLY | O_CLOEXEC);
if (fd >= 0)
return fd;
}
/* $HOME/.config */
if (home_dir) {
snprintf(path, sizeof path, "%s/.config/%s", home_dir, name);
fd = open(path, O_RDONLY | O_CLOEXEC);
if (fd >= 0)
return fd;
}
/* For each $XDG_CONFIG_DIRS: weston/<config_file> */
if (!config_dirs)
config_dirs = "/etc/xdg"; /* See XDG base dir spec. */
for (p = config_dirs; *p != '\0'; p = next) {
next = strchrnul(p, ':');
snprintf(path, sizeof path,
"%.*s/weston/%s", (int)(next - p), p, name);
fd = open(path, O_RDONLY | O_CLOEXEC);
if (fd >= 0)
return fd;
if (*next == ':')
next++;
}
/* Current working directory. */
snprintf(path, sizeof path, "./%s", name);
fd = open(path, O_RDONLY | O_CLOEXEC);
if (fd >= 0)
fprintf(stderr,
"using config in current working directory: %s\n",
path);
else
fprintf(stderr, "config file \"%s\" not found.\n", name);
return fd;
}
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