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Add WRITE_STRING_FILE_TRUNCATE to set O_TRUNC

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This commit is contained in:
williamvds 2020-10-21 17:18:25 +01:00
parent 82443be506
commit 6797a74f78
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2 changed files with 11 additions and 9 deletions
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3
src/basic/fileio.c
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@ -252,7 +252,8 @@ int write_string_file_ts(
/* We manually build our own version of fopen(..., "we") that works without O_CREAT and with O_NOFOLLOW if needed. */
fd = open(fn, O_WRONLY|O_CLOEXEC|O_NOCTTY |
(FLAGS_SET(flags, WRITE_STRING_FILE_NOFOLLOW) ? O_NOFOLLOW : 0) |
(FLAGS_SET(flags, WRITE_STRING_FILE_CREATE) ? O_CREAT : 0),
(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_MODE_0600) ? 0600 : 0666));
if (fd < 0) {
r = -errno;

17
src/basic/fileio.h
View File

@ -16,14 +16,15 @@
typedef enum {
WRITE_STRING_FILE_CREATE = 1 << 0,
WRITE_STRING_FILE_ATOMIC = 1 << 1,
WRITE_STRING_FILE_AVOID_NEWLINE = 1 << 2,
WRITE_STRING_FILE_VERIFY_ON_FAILURE = 1 << 3,
WRITE_STRING_FILE_SYNC = 1 << 4,
WRITE_STRING_FILE_DISABLE_BUFFER = 1 << 5,
WRITE_STRING_FILE_NOFOLLOW = 1 << 6,
WRITE_STRING_FILE_MKDIR_0755 = 1 << 7,
WRITE_STRING_FILE_MODE_0600 = 1 << 8,
WRITE_STRING_FILE_TRUNCATE = 1 << 1,
WRITE_STRING_FILE_ATOMIC = 1 << 2,
WRITE_STRING_FILE_AVOID_NEWLINE = 1 << 3,
WRITE_STRING_FILE_VERIFY_ON_FAILURE = 1 << 4,
WRITE_STRING_FILE_SYNC = 1 << 5,
WRITE_STRING_FILE_DISABLE_BUFFER = 1 << 6,
WRITE_STRING_FILE_NOFOLLOW = 1 << 7,
WRITE_STRING_FILE_MKDIR_0755 = 1 << 8,
WRITE_STRING_FILE_MODE_0600 = 1 << 9,
/* 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()