* lib/tmpdir.c (create_tmp_dir): New function definition.
* lib/tmpdir.h (create_tmp_dir): New function declaration.
---
lib/tmpdir.c | 119 +++++++++++++++++++++++++++++++++++++++++++++++++++
lib/tmpdir.h | 20 +++++++++
2 files changed, 139 insertions(+)
diff --git a/lib/tmpdir.c b/lib/tmpdir.c
index 28ff99f58..b6cd3e526 100644
--- a/lib/tmpdir.c
+++ b/lib/tmpdir.c
@@ -163,3 +163,122 @@ path_search (char *tmpl, size_t tmpl_len, const char
*dir, const char *pfx,
sprintf (tmpl + dlen, &"/%.*sXXXXXX"[!add_slash], (int) plen, pfx);
return 0;
}
+
+
+/* Create a unique temporary directory and return its name.
+
+ If BASEDIR is non-null the directory will be a sub-directory of BASEDIR.
+ Otherwise, if TRY_TMPDIR is non-null the directory will be created in the
+ first of $TMPDIR, P_tmpdir, /tmp that exists. If none of those directories
+ exist, the function will fail, and ENOENT will be set in errno.
+
+ TRY_TMPDIR is ignored if BASEDIR is non-null.
+
+ If PFX is non-null, the first 5 bytes of it will be used as a prefix for
+ the directory name. On failure, NULL will be returned and errno set
+ accordingly.
+
+ On success, a temporary directory will be created (using mkdtemp from
+ stdlib.h), and its name returned.
+
+ The caller is responsible for freeing the return value (and removing the
+ directory if appropriate). */
+char *
+create_tmp_dir (const char *basedir, const char *pfx, bool try_tmpdir)
+{
+ char *dir = NULL;
+ bool add_slash;
+ size_t dlen = 0;
+ size_t plen = 0;
+
+ if (!pfx || !pfx[0])
+ {
+ pfx = "file";
+ plen = 4;
+ }
+ else
+ {
+ plen = strlen (pfx);
+ if (plen > 5)
+ plen = 5;
+ }
+
+ if (basedir != NULL)
+ {
+ dir = strdup (basedir);
+ if (dir == NULL)
+ {
+ return NULL;
+ }
+ }
+
+ if (dir == NULL)
+ {
+ if (try_tmpdir)
+ {
+ char *d = __libc_secure_getenv ("TMPDIR");
+ if (d != NULL && direxists (d))
+ dir = strdup (d);
+ else if (dir != NULL && direxists (dir))
+ /* nothing */ ;
+ else
+ dir = NULL;
+ }
+ }
+
+ if (dir == NULL)
+ {
+#if defined _WIN32 && ! defined __CYGWIN__
+ char dirbuf[PATH_MAX];
+ DWORD retval;
+
+ /* Find Windows temporary file directory.
+ We try this before P_tmpdir because Windows defines P_tmpdir to "\\"
+ and will therefore try to put all temporary files in the root
+ directory (unless $TMPDIR is set). */
+ retval = GetTempPath (PATH_MAX, dirbuf);
+ if (retval > 0 && retval < PATH_MAX && direxists (dirbuf))
+ dir = strdup (dirbuf);
+ else
+#endif
+ if (direxists (P_tmpdir))
+ dir = strdup (P_tmpdir);
+ else if (strcmp (P_tmpdir, "/tmp") != 0 && direxists ("/tmp"))
+ dir = strdup ("/tmp");
+ else
+ {
+ __set_errno (ENOENT);
+ return NULL;
+ }
+ }
+
+ dlen = strlen (dir);
+#ifdef __VMS
+ add_slash = 0;
+#else
+ add_slash = dlen != 0 && !ISSLASH (dir[dlen - 1]);
+#endif
+
+ {
+ char *d = dir;
+ /* Make room for "${dir}/${pfx}XXXXXX\0" */
+ dir = realloc (d, dlen + add_slash + plen + 6 + 1);
+ if (dir == NULL)
+ {
+ int e = errno;
+ free (d);
+ __set_errno (e);
+ return NULL;
+ }
+ }
+
+ if (0 > sprintf (dir + dlen, &"/%.*sXXXXXX"[!add_slash], (int) plen, pfx))
+ {
+ int e = errno;
+ free (dir);
+ __set_errno (e);
+ return NULL;
+ }
+
+ return mkdtemp (dir);
+}
diff --git a/lib/tmpdir.h b/lib/tmpdir.h
index 4d694a3d9..ea71ef635 100644
--- a/lib/tmpdir.h
+++ b/lib/tmpdir.h
@@ -24,3 +24,23 @@
doesn't exist, none of the searched dirs exists, or there's not
enough space in TMPL. */
extern int path_search (char *tmpl, size_t tmpl_len, const char *dir, const
char *pfx, bool try_tmpdir);
+
+/* Create a unique temporary directory and return its name.
+
+ If BASEDIR is non-null the directory will be a sub-directory of BASEDIR.
+ Otherwise, if TRY_TMPDIR is non-null the directory will be created in the
+ first of $TMPDIR, P_tmpdir, /tmp that exists. If none of those directories
+ exist, the function will fail, and ENOENT will be set in errno.
+
+ TRY_TMPDIR is ignored if BASEDIR is non-null.
+
+ If PFX is non-null, the first 5 bytes of it will be used as a prefix for
+ the directory name. On failure, NULL will be returned and errno set
+ accordingly.
+
+ On success, a temporary directory will be created (using mkdtemp from
+ stdlib.h), and its name returned.
+
+ The caller is responsible for freeing the return value (and removing the
+ directory if appropriate). */
+char *create_tmp_dir (const char *basedir, const char *pfx, bool try_tmpdir);
--
2.20.1
