mktemp: add --tmpdir option

Make mktemp more compatible with coreutils.
- add "--tmpdir" option
- add long variants for "d,q,u" options

Note: Upstream ca-certificate update script started using this option.

function                                             old     new   delta
.rodata                                           104179  104219     +40
mktemp_main                                          186     194      +8
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 48/0)               Total: 48 bytes

Signed-off-by: Andrej Valek <andrej.valek@siemens.com>
Signed-off-by: Peter Marko <peter.marko@siemens.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 15 insertions, 1 deletions

diff --git a/coreutils/mktemp.c b/coreutils/mktemp.c
index 5393320a5..33e2720de 100644
--- a/coreutils/mktemp.c
+++ b/coreutils/mktemp.c
@@ -72,13 +72,27 @@ int mktemp_main(int argc UNUSED_PARAM, char **argv)
                 OPT_t = 1 << 2,
                 OPT_p = 1 << 3,
                 OPT_u = 1 << 4,
+                OPT_tmpdir = (1 << 5) * ENABLE_LONG_OPTS,
         };
 
         path = getenv("TMPDIR");
         if (!path || path[0] == '\0')
                 path = "/tmp";
 
+#if ENABLE_LONG_OPTS
+        opts = getopt32long(argv, "^"
+                "dqtp:u"
+                "\0"
+                "?1" /* 1 arg max */,
+                "directory\0" No_argument       "d"
+                "quiet\0"     No_argument       "q"
+                "dry-run\0"   No_argument       "u"
+                "tmpdir\0"    Optional_argument "\xff"
+                , &path, &path
+        );
+#else
         opts = getopt32(argv, "^" "dqtp:u" "\0" "?1"/*1 arg max*/, &path);
+#endif
 
         chp = argv[optind];
         if (!chp) {
@@ -95,7 +109,7 @@ int mktemp_main(int argc UNUSED_PARAM, char **argv)
                 goto error;
         }
 #endif
-        if (opts & (OPT_t|OPT_p))
+        if (opts & (OPT_t|OPT_p|OPT_tmpdir))
                 chp = concat_path_file(path, chp);
 
         if (opts & OPT_u) {