[PATCH v4][ 1/2] erofs-utils: introduce fixed UNIX timestamp

[Li Guifu]

Introduce option "-T" for UNIX timestamp.

Signed-off-by: Li Guifu <blucer...@gmail.com>
---
 include/erofs/config.h |  1 +
 lib/config.c           |  1 +
 mkfs/main.c            | 11 +++++++++--
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/include/erofs/config.h b/include/erofs/config.h
index fde936c..8df05a1 100644
--- a/include/erofs/config.h
+++ b/include/erofs/config.h
@@ -30,6 +30,7 @@ struct erofs_configure {
        int c_force_inodeversion;
        /* < 0, xattr disabled and INT_MAX, always use inline xattrs */
        int c_inline_xattr_tolerance;
+       long long c_unix_timestamp;
 };
 
 extern struct erofs_configure cfg;
diff --git a/lib/config.c b/lib/config.c
index dc10754..cee835c 100644
--- a/lib/config.c
+++ b/lib/config.c
@@ -24,6 +24,7 @@ void erofs_init_configure(void)
        sbi.feature_incompat = EROFS_FEATURE_INCOMPAT_LZ4_0PADDING;
        cfg.c_force_inodeversion = 0;
        cfg.c_inline_xattr_tolerance = 2;
+       cfg.c_unix_timestamp = -1;
 }
 
 void erofs_show_config(void)
diff --git a/mkfs/main.c b/mkfs/main.c
index 978c5b4..77a4b78 100644
--- a/mkfs/main.c
+++ b/mkfs/main.c
@@ -30,6 +30,7 @@ static void usage(void)
        fprintf(stderr, " -zX[,Y]   X=compressor (Y=compression level, 
optional)\n");
        fprintf(stderr, " -d#       set output message level to # (maximum 
9)\n");
        fprintf(stderr, " -EX[,...] X=extended options\n");
+       fprintf(stderr, " -T#       set a fixed UNIX timestamp # to all 
files\n");
 }
 
 static int parse_extended_opts(const char *opts)
@@ -93,7 +94,7 @@ static int mkfs_parse_options_cfg(int argc, char *argv[])
 {
        int opt, i;
 
-       while ((opt = getopt(argc, argv, "d:z:E:")) != -1) {
+       while ((opt = getopt(argc, argv, "d:z:E:T:")) != -1) {
                switch (opt) {
                case 'z':
                        if (!optarg) {
@@ -126,6 +127,9 @@ static int mkfs_parse_options_cfg(int argc, char *argv[])
                        if (opt)
                                return opt;
                        break;
+               case 'T':
+                       cfg.c_unix_timestamp = atoll(optarg);
+                       break;
 
                default: /* '?' */
                        return -EINVAL;
@@ -224,7 +228,10 @@ int main(int argc, char **argv)
                return 1;
        }
 
-       if (!gettimeofday(&t, NULL)) {
+       if (cfg.c_unix_timestamp != -1) {
+               sbi.build_time      = cfg.c_unix_timestamp;
+               sbi.build_time_nsec = 0;
+       } else if (!gettimeofday(&t, NULL)) {
                sbi.build_time      = t.tv_sec;
                sbi.build_time_nsec = t.tv_usec;
        }
-- 
2.17.1