예제 #1
0
static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
{
	int c;
	char *value;

	/* Get the full name */
	for (;;) {
		c = get_next_char();
		if (config_file_eof)
			break;
		if (!iskeychar(c))
			break;
		name[len++] = c;
		if (len >= MAXNAME)
			return -1;
	}
	name[len] = 0;
	while (c == ' ' || c == '\t')
		c = get_next_char();

	value = NULL;
	if (c != '\n') {
		if (c != '=')
			return -1;
		value = parse_value();
		if (!value)
			return -1;
	}
	return fn(name, value, data);
}
예제 #2
0
static int fg_config_parse_key(const char *key, char **store_key, int *baselen_)
{
	int i, dot, baselen;
	const char *last_dot = strrchr(key, '.');

	/*
	 * Since "key" actually contains the section name and the real
	 * key name separated by a dot, we have to know where the dot is.
	 */

	if (last_dot == NULL || last_dot == key) {
		printf("key does not contain a section: %s\n", key);
		return -2;
	}

	if (!last_dot[1]) {
		printf("key does not contain variable name: %s\n", key);
		return -2;
	}

	baselen = last_dot - key;
	if (baselen_)
		*baselen_ = baselen;

	/*
	 * Validate the key and while at it, lower case it for matching.
	 */
	*store_key = malloc(strlen(key) + 1);

	dot = 0;
	for (i = 0; key[i]; i++) {
		unsigned char c = key[i];
		if (c == '.')
			dot = 1;
		/* Leave the extended basename untouched.. */
		if (!dot || i > baselen) {
			if (!iskeychar(c) ||
			    (i == baselen + 1 && !isalpha(c))) {
				printf("invalid key: %s\n", key);
				goto out_free_ret_1;
			}
			c = tolower(c);
		} else if (c == '\n') {
			printf("invalid key (newline): %s\n", key);
			goto out_free_ret_1;
		}
		(*store_key)[i] = c;
	}
	(*store_key)[i] = 0;

	return 0;

out_free_ret_1:
	free(*store_key);
	return -1;
}
예제 #3
0
static int get_base_var(char *name)
{
	int baselen = 0;

	for (;;) {
		int c = get_next_char();
		if (config_file_eof)
			return -1;
		if (c == ']')
			return baselen;
		if (isspace(c))
			return get_extended_base_var(name, baselen, c);
		if (!iskeychar(c) && c != '.')
			return -1;
		if (baselen > MAXNAME / 2)
			return -1;
		name[baselen++] = tolower(c);
	}
}
예제 #4
0
/**
	read the rest of the key name and value from the the config file

	\param key key correspondig to value
	\param len number of chars already read into key
	\returns 0 if successful
*/
static int get_value(char *key, unsigned int len)
{
	int c;
	char *value;

	/* Get the full key */
	for (;;) {
		c = get_next_char();
		if (file_EOF)
			break;
		if (!iskeychar(c))
			break;
		key[len++] = tolower(c);
		if (len >= MAXNAME)
			return -1;
	}
	key[len] = 0;
	while (c == ' ' || c == '\t')
		c = get_next_char();

	value = NULL;

	if (c != '\n') {
		/* uncomment this line and comment the ungetc line if you want to use "parameter = value" style in your config file */
		/*if (c != '=')
			return -1;*/
		ungetc(c, file_ptr);
		value = parse_value();
		if (!value)
			return -1;
	}

	if (value != NULL)
		add_to_config_list(key, value);

	return 0;
}
예제 #5
0
파일: config.c 프로젝트: DJHartley/git
/*
 * If value==NULL, unset in (remove from) config,
 * if value_regex!=NULL, disregard key/value pairs where value does not match.
 * if multi_replace==0, nothing, or only one matching key/value is replaced,
 *     else all matching key/values (regardless how many) are removed,
 *     before the new pair is written.
 *
 * Returns 0 on success.
 *
 * This function does this:
 *
 * - it locks the config file by creating ".git/config.lock"
 *
 * - it then parses the config using store_aux() as validator to find
 *   the position on the key/value pair to replace. If it is to be unset,
 *   it must be found exactly once.
 *
 * - the config file is mmap()ed and the part before the match (if any) is
 *   written to the lock file, then the changed part and the rest.
 *
 * - the config file is removed and the lock file rename()d to it.
 *
 */
int git_config_set_multivar(const char* key, const char* value,
	const char* value_regex, int multi_replace)
{
	int i, dot;
	int fd = -1, in_fd;
	int ret;
	char* config_filename;
	struct lock_file *lock = NULL;
	const char* last_dot = strrchr(key, '.');

	if (config_exclusive_filename)
		config_filename = xstrdup(config_exclusive_filename);
	else
		config_filename = git_pathdup("config");

	/*
	 * Since "key" actually contains the section name and the real
	 * key name separated by a dot, we have to know where the dot is.
	 */

	if (last_dot == NULL) {
		error("key does not contain a section: %s", key);
		ret = 2;
		goto out_free;
	}
	store.baselen = last_dot - key;

	store.multi_replace = multi_replace;

	/*
	 * Validate the key and while at it, lower case it for matching.
	 */
	store.key = xmalloc(strlen(key) + 1);
	dot = 0;
	for (i = 0; key[i]; i++) {
		unsigned char c = key[i];
		if (c == '.')
			dot = 1;
		/* Leave the extended basename untouched.. */
		if (!dot || i > store.baselen) {
			if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
				error("invalid key: %s", key);
				free(store.key);
				ret = 1;
				goto out_free;
			}
			c = tolower(c);
		} else if (c == '\n') {
			error("invalid key (newline): %s", key);
			free(store.key);
			ret = 1;
			goto out_free;
		}
		store.key[i] = c;
	}
	store.key[i] = 0;

	/*
	 * The lock serves a purpose in addition to locking: the new
	 * contents of .git/config will be written into it.
	 */
	lock = xcalloc(sizeof(struct lock_file), 1);
	fd = hold_lock_file_for_update(lock, config_filename, 0);
	if (fd < 0) {
		error("could not lock config file %s", config_filename);
		free(store.key);
		ret = -1;
		goto out_free;
	}

	/*
	 * If .git/config does not exist yet, write a minimal version.
	 */
	in_fd = open(config_filename, O_RDONLY);
	if ( in_fd < 0 ) {
		free(store.key);

		if ( ENOENT != errno ) {
			error("opening %s: %s", config_filename,
			      strerror(errno));
			ret = 3; /* same as "invalid config file" */
			goto out_free;
		}
		/* if nothing to unset, error out */
		if (value == NULL) {
			ret = 5;
			goto out_free;
		}

		store.key = (char*)key;
		if (!store_write_section(fd, key) ||
		    !store_write_pair(fd, key, value))
			goto write_err_out;
	} else {
		struct stat st;
		char* contents;
		size_t contents_sz, copy_begin, copy_end;
		int i, new_line = 0;

		if (value_regex == NULL)
			store.value_regex = NULL;
		else {
			if (value_regex[0] == '!') {
				store.do_not_match = 1;
				value_regex++;
			} else
				store.do_not_match = 0;

			store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
			if (regcomp(store.value_regex, value_regex,
					REG_EXTENDED)) {
				error("invalid pattern: %s", value_regex);
				free(store.value_regex);
				ret = 6;
				goto out_free;
			}
		}

		store.offset[0] = 0;
		store.state = START;
		store.seen = 0;

		/*
		 * After this, store.offset will contain the *end* offset
		 * of the last match, or remain at 0 if no match was found.
		 * As a side effect, we make sure to transform only a valid
		 * existing config file.
		 */
		if (git_config_from_file(store_aux, config_filename, NULL)) {
			error("invalid config file %s", config_filename);
			free(store.key);
			if (store.value_regex != NULL) {
				regfree(store.value_regex);
				free(store.value_regex);
			}
			ret = 3;
			goto out_free;
		}

		free(store.key);
		if (store.value_regex != NULL) {
			regfree(store.value_regex);
			free(store.value_regex);
		}

		/* if nothing to unset, or too many matches, error out */
		if ((store.seen == 0 && value == NULL) ||
				(store.seen > 1 && multi_replace == 0)) {
			ret = 5;
			goto out_free;
		}

		fstat(in_fd, &st);
		contents_sz = xsize_t(st.st_size);
		contents = xmmap(NULL, contents_sz, PROT_READ,
			MAP_PRIVATE, in_fd, 0);
		close(in_fd);

		if (store.seen == 0)
			store.seen = 1;

		for (i = 0, copy_begin = 0; i < store.seen; i++) {
			if (store.offset[i] == 0) {
				store.offset[i] = copy_end = contents_sz;
			} else if (store.state != KEY_SEEN) {
				copy_end = store.offset[i];
			} else
				copy_end = find_beginning_of_line(
					contents, contents_sz,
					store.offset[i]-2, &new_line);

			if (copy_end > 0 && contents[copy_end-1] != '\n')
				new_line = 1;

			/* write the first part of the config */
			if (copy_end > copy_begin) {
				if (write_in_full(fd, contents + copy_begin,
						  copy_end - copy_begin) <
				    copy_end - copy_begin)
					goto write_err_out;
				if (new_line &&
				    write_in_full(fd, "\n", 1) != 1)
					goto write_err_out;
			}
			copy_begin = store.offset[i];
		}

		/* write the pair (value == NULL means unset) */
		if (value != NULL) {
			if (store.state == START) {
				if (!store_write_section(fd, key))
					goto write_err_out;
			}
			if (!store_write_pair(fd, key, value))
				goto write_err_out;
		}

		/* write the rest of the config */
		if (copy_begin < contents_sz)
			if (write_in_full(fd, contents + copy_begin,
					  contents_sz - copy_begin) <
			    contents_sz - copy_begin)
				goto write_err_out;

		munmap(contents, contents_sz);
	}

	if (commit_lock_file(lock) < 0) {
		error("could not commit config file %s", config_filename);
		ret = 4;
		goto out_free;
	}

	/*
	 * lock is committed, so don't try to roll it back below.
	 * NOTE: Since lockfile.c keeps a linked list of all created
	 * lock_file structures, it isn't safe to free(lock).  It's
	 * better to just leave it hanging around.
	 */
	lock = NULL;
	ret = 0;

out_free:
	if (lock)
		rollback_lock_file(lock);
	free(config_filename);
	return ret;

write_err_out:
	ret = write_error(lock->filename);
	goto out_free;

}