diff options
| author | David Oberhollenzer <david.oberhollenzer@sigma-star.at> | 2019-08-02 11:41:36 +0200 |
|---|---|---|
| committer | David Oberhollenzer <david.oberhollenzer@sigma-star.at> | 2019-08-02 11:41:36 +0200 |
| commit | 402fc5a6000bf0ec12f05d4aa2b3e250ec85a60a (patch) | |
| tree | 7d9a1b7bc77cbd0211e3e4cb31c079778207453a /doc/tar2sqfs.1 | |
| parent | eddb62072f4d4d2402d520e5041d9677fa6efdff (diff) | |
Implement support for SOURCE_DATE_EPOCH environment variable
reproducible-builds.org suggests the use of an environment variable
as a source for time stamps:
https://reproducible-builds.org/specs/source-date-epoch/
This commit adds support for setting the default mtime from the variable,
if it is set and only defaulting to 0 if not. The timestamp given by the
command line switch takes precedence.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'doc/tar2sqfs.1')
| -rw-r--r-- | doc/tar2sqfs.1 | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/doc/tar2sqfs.1 b/doc/tar2sqfs.1 index 76178bf..7965a26 100644 --- a/doc/tar2sqfs.1 +++ b/doc/tar2sqfs.1 @@ -52,7 +52,7 @@ rd. uid=<value>;0 gid=<value>;0 mode=<value>;0755 -mtime=<value>;0 +mtime=<value>;\fB$SOURCE\_DATE\_EPOCH\fR if set, 0 otherwise .TE .TP .TP @@ -95,6 +95,13 @@ If any unsupported section or extended attribute key is encountered in an archive a warning message is written to stderr. If the \fB\-\-no\-skip\fR option is set, processing aborts. By default, unknown sections and unsupported extended attributes are simply skipped after issuing a warning. +.SH ENVIRONEMNT VARIABLES +If the command line switch \fB\-\-defaults\fR is not used or no default mtime +is specified, the value of the environment variable \fBSOURCE\_DATE\_EPOCH\fR +is used for all file and filesystem timestamps. + +If \fBSOURCE\_DATE\_EPOCH\fR is not set, not a parsable number or it is out of +range, the timestamps default to 0. .SH EXAMPLES .TP Turn an uncompressed tar archive into a squashfs image: |