dasharo/systemd
0
0
Fork 0
mirror of https://github.com/Dasharo/systemd.git synced 2026-03-06 15:02:31 -08:00
Code Issues Packages Projects Releases Wiki Activity

fileio: add new flag WRITE_STRING_FILE_MODE_0444

Browse Source 
With this write_string_file() will create the file with 0444 access mode
(i.e. read-only).
This commit is contained in:
Lennart Poettering
2024-01-05 16:31:55 +01:00
parent 3289aba5a0
commit 2148c669d2
2 changed files with 17 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
src/basic/fileio.c
View File

@@ -200,6 +200,19 @@ int write_string_stream_ts(
return 0;
}
static mode_t write_string_file_flags_to_mode(WriteStringFileFlags flags) {
/* We support three different modes, that are the ones that really make sense for text files like this:
*
* → 0600 (i.e. root-only)
* → 0444 (i.e. read-only)
* → 0644 (i.e. writable for root, readable for everyone else)
*/
return FLAGS_SET(flags, WRITE_STRING_FILE_MODE_0600) ? 0600 :
FLAGS_SET(flags, WRITE_STRING_FILE_MODE_0444) ? 0444 : 0644;
}
static int write_string_file_atomic_at(
int dir_fd,
const char *fn,
@@ -225,7 +238,7 @@ static int write_string_file_atomic_at(
if (r < 0)
goto fail;
r = fchmod_umask(fileno(f), FLAGS_SET(flags, WRITE_STRING_FILE_MODE_0600) ? 0600 : 0644);
r = fchmod_umask(fileno(f), write_string_file_flags_to_mode(flags));
if (r < 0)
goto fail;
@@ -288,7 +301,7 @@ int write_string_file_ts_at(
(FLAGS_SET(flags, WRITE_STRING_FILE_CREATE) ? O_CREAT : 0) |
(FLAGS_SET(flags, WRITE_STRING_FILE_TRUNCATE) ? O_TRUNC : 0) |
(FLAGS_SET(flags, WRITE_STRING_FILE_SUPPRESS_REDUNDANT_VIRTUAL) ? O_RDWR : O_WRONLY),
(FLAGS_SET(flags, WRITE_STRING_FILE_MODE_0600) ? 0600 : 0666));
write_string_file_flags_to_mode(flags));
if (fd < 0) {
r = -errno;
goto fail;

3
src/basic/fileio.h
View File

@@ -26,7 +26,8 @@ typedef enum {
WRITE_STRING_FILE_NOFOLLOW = 1 << 8,
WRITE_STRING_FILE_MKDIR_0755 = 1 << 9,
WRITE_STRING_FILE_MODE_0600 = 1 << 10,
WRITE_STRING_FILE_SUPPRESS_REDUNDANT_VIRTUAL = 1 << 11,
WRITE_STRING_FILE_MODE_0444 = 1 << 11,
WRITE_STRING_FILE_SUPPRESS_REDUNDANT_VIRTUAL = 1 << 12,
/* And before you wonder, why write_string_file_atomic_label_ts() is a separate function instead of just one
more flag here: it's about linking: we don't want to pull -lselinux into all users of write_string_file()