/*
* 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;
}
/*
* 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 fg_config_set_multivar(const char *key, const char *value,
const char *value_regex, int multi_replace)
{
int fd = -1, in_fd;
int ret;
char *config_filename;
struct lockfile *lock = NULL;
if (config_exclusive_filename)
config_filename = xstrdup(config_exclusive_filename);
else
return -1;
/* parse-key returns negative; flip the sign to feed exit(3) */
ret = 0 - fg_config_parse_key(key, &store.key, &store.baselen);
if (ret)
goto out_free;
store.multi_replace = multi_replace;
/*
* The lock serves a purpose in addition to locking: the new
* contents of .git/config will be written into it.
*/
lock = xcalloc(sizeof(struct lockfile), 1);
//fd = hold_lock_file_for_update(lock, config_filename, 0);
if (strlen(config_filename) >= sizeof(lock->filename))
return -1;
//strcpy(lock->filename, config_filename);
snprintf(lock->filename, PATH_MAX, "%s.lock", config_filename);
lock->fd = open(lock->filename, O_RDWR | O_CREAT | O_EXCL, 0666);
fd = lock->fd;
if (fd < 0) {
error("could not lock config file %s: %s", config_filename, strerror(errno));
free(store.key);
ret = -1;
goto out_free;
}
in_fd = open(config_filename, O_RDONLY);
if ( in_fd < 0 ) {
/*
* If .git/config does not exist yet, write a minimal version.
*/
} 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 (fg_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 = mmap(NULL, contents_sz, PROT_READ,
MAP_PRIVATE, in_fd, 0);
if (!contents)
die_errno("Out of memory? mmap failed");
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_str_in_full(fd, "\n") != 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 (lock->fd >= 0) {
char result_file[PATH_MAX];
int i;
close(lock->fd);
strcpy(result_file, lock->filename);
i = strlen(result_file) - 5; /* .lock */
result_file[i] = 0;
if (rename(lock->filename, result_file))
return -1;
lock->filename[0] = 0;
} else {
ret = -1;
goto out_free;
}
/* 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) {
if (lock->filename[0]) {
if (lock->fd >= 0)
close(lock->fd);
unlink(lock->filename);
}
lock->filename[0] = 0;
}
free(config_filename);
return ret;
write_err_out:
// ret = write_error(lock->filename);
goto out_free;
}
/*
* 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;
struct stat st;
int fd;
char* config_filename = strdup(git_path("config"));
char* lock_file = strdup(git_path("config.lock"));
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) {
fprintf(stderr, "key does not contain a section: %s\n", key);
return 2;
}
store.baselen = last_dot - key;
store.multi_replace = multi_replace;
/*
* Validate the key and while at it, lower case it for matching.
*/
store.key = (char*)malloc(strlen(key)+1);
for (i = 0; key[i]; i++)
if (i != store.baselen &&
((!isalnum(key[i]) && key[i] != '.') ||
(i == store.baselen+1 && !isalpha(key[i])))) {
fprintf(stderr, "invalid key: %s\n", key);
free(store.key);
return 1;
} else
store.key[i] = tolower(key[i]);
store.key[i] = 0;
/*
* The lock_file serves a purpose in addition to locking: the new
* contents of .git/config will be written into it.
*/
fd = open(lock_file, O_WRONLY | O_CREAT | O_EXCL, 0666);
if (fd < 0) {
fprintf(stderr, "could not lock config file\n");
free(store.key);
return -1;
}
/*
* If .git/config does not exist yet, write a minimal version.
*/
if (stat(config_filename, &st)) {
free(store.key);
/* if nothing to unset, error out */
if (value == NULL) {
close(fd);
unlink(lock_file);
return 5;
}
store.key = (char*)key;
store_write_section(fd, key);
store_write_pair(fd, key, value);
} else{
int in_fd;
char* contents;
int i, copy_begin, copy_end, 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*)malloc(sizeof(regex_t));
if (regcomp(store.value_regex, value_regex,
REG_EXTENDED)) {
fprintf(stderr, "Invalid pattern: %s",
value_regex);
free(store.value_regex);
return 6;
}
}
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(store_aux)) {
fprintf(stderr, "invalid config file\n");
free(store.key);
if (store.value_regex != NULL) {
regfree(store.value_regex);
free(store.value_regex);
}
return 3;
}
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)) {
close(fd);
unlink(lock_file);
return 5;
}
in_fd = open(config_filename, O_RDONLY, 0666);
contents = mmap(NULL, st.st_size, 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 = st.st_size;
} else if (store.state != KEY_SEEN) {
copy_end = store.offset[i];
} else
copy_end = find_beginning_of_line(
contents, st.st_size,
store.offset[i]-2, &new_line);
/* write the first part of the config */
if (copy_end > copy_begin) {
write(fd, contents + copy_begin,
copy_end - copy_begin);
if (new_line)
write(fd, "\n", 1);
}
copy_begin = store.offset[i];
}
/* write the pair (value == NULL means unset) */
if (value != NULL) {
if (store.state == START)
store_write_section(fd, key);
store_write_pair(fd, key, value);
}
/* write the rest of the config */
if (copy_begin < st.st_size)
write(fd, contents + copy_begin,
st.st_size - copy_begin);
munmap(contents, st.st_size);
unlink(config_filename);
}
close(fd);
if (rename(lock_file, config_filename) < 0) {
fprintf(stderr, "Could not rename the lock file?\n");
return 4;
}
return 0;
}
/*
* 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 fd = -1, in_fd;
int ret;
char *config_filename;
struct lock_file *lock = NULL;
if (config_exclusive_filename)
config_filename = xstrdup(config_exclusive_filename);
else
config_filename = git_pathdup("config");
/* parse-key returns negative; flip the sign to feed exit(3) */
ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
if (ret)
goto out_free;
store.multi_replace = multi_replace;
/*
* 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: %s", config_filename, strerror(errno));
free(store.key);
ret = CONFIG_NO_LOCK;
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 = CONFIG_INVALID_FILE; /* same as "invalid config file" */
goto out_free;
}
/* if nothing to unset, error out */
if (value == NULL) {
ret = CONFIG_NOTHING_SET;
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 = CONFIG_INVALID_PATTERN;
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 = CONFIG_INVALID_FILE;
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 = CONFIG_NOTHING_SET;
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_str_in_full(fd, "\n") != 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 = CONFIG_NO_WRITE;
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;
}
