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* Fix for a problem with BSD's group ownership semantics when the user 

is not in the "wheel" group.
This commit is contained in:
Eelco Dolstra 2006-06-14 11:53:55 +00:00
parent 3a68622dda
commit b454977909
1 changed files with 13 additions and 1 deletions
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14
src/libutil/util.cc
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@ -300,7 +300,19 @@ Path createTempDir()
while (1) {
checkInterrupt();
Path tmpDir = tempName();
if (mkdir(tmpDir.c_str(), 0777) == 0) return tmpDir;
if (mkdir(tmpDir.c_str(), 0777) == 0) {
/* Explicitly set the group of the directory. This is to
work around around problems caused by BSD's group
ownership semantics (directories inherit the group of
the parent). For instance, the group of /tmp on
FreeBSD is "wheel", so all directories created in /tmp
will be owned by "wheel"; but if the user is not in
"wheel", then "tar" will fail to unpack archives that
have the setgid bit set on directories. */
if (chown(tmpDir.c_str(), (uid_t) -1, getegid()) != 0)
throw SysError(format("setting group of directory `%1%'") % tmpDir);
return tmpDir;
}
if (errno != EEXIST)
throw SysError(format("creating directory `%1%'") % tmpDir);
}