[PATCH] git: add git_mkstemp()

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/cache.h b/cache.h
index fd4988ed9a0d8f75c66127a6186aae0d5d76a913..6dbc32a7e60434647020672e677b7bf76a8b9f94 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -181,7 +181,10 @@ extern char *sha1_file_name(const unsigned char *sha1);
 extern char *sha1_pack_name(const unsigned char *sha1);
 extern char *sha1_pack_index_name(const unsigned char *sha1);
 
+int git_mkstemp(char *path, size_t n, const char *template);
+
 int safe_create_leading_directories(char *path);
+char *safe_strncpy(char *, const char *, size_t);
 
 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 extern int unpack_sha1_header(z_stream *stream, void *map, unsigned long mapsize, void *buffer, unsigned long size);

diff --git a/path.c b/path.c
index d217ef0b7f04d7e021770cb50a7c58c14bc7920d..7ef0d1b80d926d832816a587ddff721cb03130b3 100644 (file)
--- a/path.c
+++ b/path.c
@@ -58,3 +58,29 @@ char *git_path(const char *fmt, ...)
                return bad_path;
        return cleanup_path(pathname);
 }
+
+
+/* git_mkstemp() - create tmp file honoring TMPDIR variable */
+int git_mkstemp(char *path, size_t len, const char *template)
+{
+       char *env, *pch = path;
+
+       if ((env = getenv("TMPDIR")) == NULL) {
+               strcpy(pch, "/tmp/");
+               len -= 5;
+       } else
+               len -= snprintf(pch, len, "%s/", env);
+
+       safe_strncpy(pch, template, len);
+
+       return mkstemp(path);
+}
+
+
+char *safe_strncpy(char *dest, const char *src, size_t n)
+{
+       strncpy(dest, src, n);
+       dest[n - 1] = '\0';
+
+       return dest;
+}