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fileio: introduce new mode to suppress writing the same value

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This commit is contained in:
Antony Deepak Thomas
2021-09-29 13:06:25 +09:00
committed by Yu Watanabe
parent 8034b42ca6
commit e565cfd2eb
2 changed files with 39 additions and 13 deletions
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src/basic/fileio.h
+12 -11
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@@ -15,17 +15,18 @@
#define LONG_LINE_MAX (1U*1024U*1024U)
typedef enum {
WRITE_STRING_FILE_CREATE = 1 << 0,
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_VERIFY_IGNORE_NEWLINE = 1 << 5,
WRITE_STRING_FILE_SYNC = 1 << 6,
WRITE_STRING_FILE_DISABLE_BUFFER = 1 << 7,
WRITE_STRING_FILE_NOFOLLOW = 1 << 8,
WRITE_STRING_FILE_MKDIR_0755 = 1 << 9,
WRITE_STRING_FILE_MODE_0600 = 1 << 10,
WRITE_STRING_FILE_CREATE = 1 << 0,
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_VERIFY_IGNORE_NEWLINE = 1 << 5,
WRITE_STRING_FILE_SYNC = 1 << 6,
WRITE_STRING_FILE_DISABLE_BUFFER = 1 << 7,
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,
/* 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()