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tools/squashfs: add argument -fixed-time to set all timestamps

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-fixed-time <timestamp> set mkfs-timestamp and file-mtime to this timestamp.
Reproducible builds requires the removal of all timestamp or setting all to a specific one.

Signed-off-by: Alexander Couzens <lynxis@fe80.eu>

SVN-Revision: 47858
This commit is contained in:
John Crispin
2015-12-11 15:07:15 +00:00
parent 725fc09cec
commit fd1c1b4918
2 changed files with 163 additions and 0 deletions
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84
tools/squashfs4/patches/200-add-fixed-timestamp-option.patch Normal file
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@@ -0,0 +1,84 @@
Index: squashfs4.2/squashfs-tools/mksquashfs.c
===================================================================
--- squashfs4.2.orig/squashfs-tools/mksquashfs.c
+++ squashfs4.2/squashfs-tools/mksquashfs.c
@@ -175,6 +175,9 @@ unsigned int cache_bytes = 0, cache_size
/* inode lookup table */
squashfs_inode *inode_lookup_table = NULL;
+/* override all timestamps */
+time_t fixed_time = -1;
+
/* in memory directory data */
#define I_COUNT_SIZE 128
#define DIR_ENTRIES 32
@@ -2452,6 +2455,8 @@ again:
restat:
fstat(file, &buf2);
close(file);
+ if (fixed_time != -1)
+ buf2.st_mtime = fixed_time;
if(read_size != buf2.st_size) {
memcpy(buf, &buf2, sizeof(struct stat));
file_buffer->error = 2;
@@ -3612,7 +3617,7 @@ void dir_scan(squashfs_inode *inode, cha
buf.st_mode = S_IRWXU | S_IRWXG | S_IRWXO | S_IFDIR;
buf.st_uid = getuid();
buf.st_gid = getgid();
- buf.st_mtime = time(NULL);
+ buf.st_mtime = fixed_time != -1 ? fixed_time : time(NULL);
buf.st_dev = 0;
buf.st_ino = 0;
dir_ent->inode = lookup_inode(&buf);
@@ -3623,6 +3628,8 @@ void dir_scan(squashfs_inode *inode, cha
pathname, strerror(errno));
return;
}
+ if(fixed_time != -1)
+ buf.st_mtime = fixed_time;
dir_ent->inode = lookup_inode(&buf);
}
@@ -3677,6 +3684,8 @@ struct dir_info *dir_scan1(char *pathnam
filename, strerror(errno));
continue;
}
+ if(fixed_time != -1)
+ buf.st_mtime = fixed_time;
if((buf.st_mode & S_IFMT) != S_IFREG &&
(buf.st_mode & S_IFMT) != S_IFDIR &&
@@ -3795,7 +3804,7 @@ struct dir_info *dir_scan2(struct dir_in
buf.st_gid = pseudo_ent->dev->gid;
buf.st_rdev = makedev(pseudo_ent->dev->major,
pseudo_ent->dev->minor);
- buf.st_mtime = time(NULL);
+ buf.st_mtime = fixed_time != -1 ? fixed_time : time(NULL);
buf.st_ino = pseudo_ino ++;
if(pseudo_ent->dev->type == 'f') {
@@ -4674,6 +4683,15 @@ int main(int argc, char *argv[])
progress = FALSE;
else if(strcmp(argv[i], "-no-exports") == 0)
exportable = FALSE;
+ else if(strcmp(argv[i], "-fixed-time") == 0) {
+ if((++i == argc) || (fixed_time =
+ strtoll(argv[i], &b, 10), *b != '\0')) {
+ ERROR("%s: -fixed-time missing or invalid "
+ "timestamp\n", argv[0]);
+
+ exit(1);
+ }
+ }
else if(strcmp(argv[i], "-processors") == 0) {
if((++i == argc) || (processors =
strtol(argv[i], &b, 10), *b != '\0')) {
@@ -5314,7 +5332,7 @@ printOptions:
sBlk.flags = SQUASHFS_MKFLAGS(noI, noD, noF, noX, no_fragments,
always_use_fragments, duplicate_checking, exportable,
no_xattrs, comp_opts);
- sBlk.mkfs_time = time(NULL);
+ sBlk.mkfs_time = fixed_time != -1 ? fixed_time : time(NULL);
restore_filesystem:
if(progress && estimated_uncompressed) {