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

[Gao Xiang]

Hi Guifu,

On Sat, Oct 12, 2019 at 01:09:52AM +0800, Li Guifu wrote:
> Introduce option "-T" for UNIX timestamp.
> 
> Signed-off-by: Li Guifu <blucerlee at gmail.com>
> ---

Applied with the following minor changes.
Let me know if you have some other thoughts...

>From 0da0c97cc5ca7e02192ee99dde0a82cb531823a6 Mon Sep 17 00:00:00 2001
From: Li Guifu <blucerlee at gmail.com>
Date: Sat, 12 Oct 2019 01:09:52 +0800
Subject: [PATCH] erofs-utils: introduce fixed UNIX timestamp

Introduce option "-T" for UNIX timestamp.

Signed-off-by: Li Guifu <blucerlee at gmail.com>
[ Gao Xiang: use u64 for timestamp rather than long long. ]
Signed-off-by: Gao Xiang <hsiangkao at aol.com>
---
 include/erofs/config.h |  1 +
 lib/config.c           |  1 +
 mkfs/main.c            | 16 ++++++++++++++--
 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/include/erofs/config.h b/include/erofs/config.h
index 8b09430..9711638 100644
--- a/include/erofs/config.h
+++ b/include/erofs/config.h
@@ -28,6 +28,7 @@ struct erofs_configure {
 	char *c_compr_alg_master;
 	int c_compr_level_master;
 	int c_force_inodeversion;
+	u64 c_unix_timestamp;
 };
 
 extern struct erofs_configure cfg;
diff --git a/lib/config.c b/lib/config.c
index 110c8b6..4cddc25 100644
--- a/lib/config.c
+++ b/lib/config.c
@@ -23,6 +23,7 @@ void erofs_init_configure(void)
 	cfg.c_compr_level_master = -1;
 	sbi.feature_incompat = EROFS_FEATURE_INCOMPAT_LZ4_0PADDING;
 	cfg.c_force_inodeversion = 0;
+	cfg.c_unix_timestamp = -1;
 }
 
 void erofs_show_config(void)
diff --git a/mkfs/main.c b/mkfs/main.c
index 4b279c0..6ecc905 100644
--- a/mkfs/main.c
+++ b/mkfs/main.c
@@ -29,6 +29,7 @@ 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)
@@ -90,9 +91,10 @@ static int parse_extended_opts(const char *opts)
 
 static int mkfs_parse_options_cfg(int argc, char *argv[])
 {
+	char *endptr;
 	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) {
@@ -125,6 +127,13 @@ static int mkfs_parse_options_cfg(int argc, char *argv[])
 			if (opt)
 				return opt;
 			break;
+		case 'T':
+			cfg.c_unix_timestamp = strtoull(optarg, &endptr, 0);
+			if (cfg.c_unix_timestamp == -1 || *endptr != '\0') {
+				erofs_err("invalid UNIX timestamp %s", optarg);
+				return -EINVAL;
+			}
+			break;
 
 		default: /* '?' */
 			return -EINVAL;
@@ -223,7 +232,10 @@ 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