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| author | Mathias Kresin <dev@kresin.me> | 2019-01-05 07:34:02 +0100 |
|---|---|---|
| committer | Mathias Kresin <dev@kresin.me> | 2019-01-13 18:31:10 +0100 |
| commit | e428b127e7c9964a20cfd4cfb30b43262a10bfbe (patch) | |
| tree | 7341b5868a2f27c63a70926966b875eaac1db9f8 /tools | |
| parent | f4aa9d8839958c39d24d7cca3d3215efad98a1e2 (diff) | |
| download | upstream-e428b127e7c9964a20cfd4cfb30b43262a10bfbe.tar.gz upstream-e428b127e7c9964a20cfd4cfb30b43262a10bfbe.tar.bz2 upstream-e428b127e7c9964a20cfd4cfb30b43262a10bfbe.zip | |
firmware-utils: mkdlinkfw: create reproducible header
Use the SOURCE_DATE_EPOCH environment variable if set instead of the
current time. The used timestamp matches the timestamp of the latest
commit this way and make the images reproducible.
Signed-off-by: Mathias Kresin <dev@kresin.me>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/firmware-utils/src/mkdlinkfw-lib.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/tools/firmware-utils/src/mkdlinkfw-lib.c b/tools/firmware-utils/src/mkdlinkfw-lib.c index a661c0bc82..3b71fda7db 100644 --- a/tools/firmware-utils/src/mkdlinkfw-lib.c +++ b/tools/firmware-utils/src/mkdlinkfw-lib.c @@ -34,9 +34,24 @@ extern char *progname; uint32_t jboot_timestamp(void) { - time_t rawtime; - time(&rawtime); - return (((uint32_t) rawtime) - TIMESTAMP_MAGIC) >> 2; + char *env = getenv("SOURCE_DATE_EPOCH"); + char *endptr = env; + time_t fixed_timestamp = -1; + errno = 0; + + if (env && *env) { + fixed_timestamp = strtoull(env, &endptr, 10); + + if (errno || (endptr && *endptr != '\0')) { + fprintf(stderr, "Invalid SOURCE_DATE_EPOCH"); + fixed_timestamp = -1; + } + } + + if (fixed_timestamp == -1) + time(&fixed_timestamp); + + return (((uint32_t) fixed_timestamp) - TIMESTAMP_MAGIC) >> 2; } uint16_t jboot_checksum(uint16_t start_val, uint16_t *data, int size) |