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tar: fix reproducibility issue

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Force root/root as names for uid0/gid0 instead of using the system
names. This helps make packed download tarballs more reproducible

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau
2016-12-19 21:06:07 +01:00
parent dea6baf8fa
commit 2b510d97ba
1 changed files with 22 additions and 0 deletions
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22
tools/tar/patches/100-symlink-force-root-name.patch Normal file
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@@ -0,0 +1,22 @@
Force root/root as names for uid0/gid0 instead of using the system
names. This helps make packed download tarballs more reproducible
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
--- a/src/create.c
+++ b/src/create.c
@@ -545,12 +545,8 @@ write_gnu_long_link (struct tar_stat_inf
char *tmpname;
header = start_private_header ("././@LongLink", size, 0);
- uid_to_uname (0, &tmpname);
- UNAME_TO_CHARS (tmpname, header->header.uname);
- free (tmpname);
- gid_to_gname (0, &tmpname);
- GNAME_TO_CHARS (tmpname, header->header.gname);
- free (tmpname);
+ UNAME_TO_CHARS ("root", header->header.uname);
+ GNAME_TO_CHARS ("root", header->header.gname);
strcpy (header->buffer + offsetof (struct posix_header, magic),
OLDGNU_MAGIC);