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Set default "tar" umask to 002 and owner.group to root.root

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In order to make the generated tar files more friendly to users who
extract them as root using GNU tar and its implied -p option, change
the default umask to 002 and change the owner name and group name to
root.  This ensures that a) the extracted files and directories are
not world-writable and b) that they belong to user and group root.

Before they would have been assigned to a user and/or group named
git if it existed.  This also answers the question in the removed
comment: uid=0, gid=0, uname=root, gname=root is exactly what we
want.

Normal users who let tar apply their umask while extracting are
only affected if their umask allowed the world to change their
files (e.g. a umask of zero).  This case is so unlikely and strange
that we don't need to support it.

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
René Scharfe 2007-01-05 23:30:22 +01:00 committed by Junio C Hamano
parent 21afc41c36
commit f08b3b0e2e
1 changed files with 3 additions and 4 deletions
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7
archive-tar.c
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@ -15,7 +15,7 @@ static char block[BLOCKSIZE];
static unsigned long offset;
static time_t archive_time;
static int tar_umask;
static int tar_umask = 002;
static int verbose;
/* writes out the whole block, but only if it is full */
@ -210,11 +210,10 @@ static void write_entry(const unsigned char *sha1, struct strbuf *path,
sprintf(header.size, "%011lo", S_ISREG(mode) ? size : 0);
sprintf(header.mtime, "%011lo", archive_time);
/* XXX: should we provide more meaningful info here? */
sprintf(header.uid, "%07o", 0);
sprintf(header.gid, "%07o", 0);
strlcpy(header.uname, "git", sizeof(header.uname));
strlcpy(header.gname, "git", sizeof(header.gname));
strlcpy(header.uname, "root", sizeof(header.uname));
strlcpy(header.gname, "root", sizeof(header.gname));
sprintf(header.devmajor, "%07o", 0);
sprintf(header.devminor, "%07o", 0);