Move av_tempfile() into libavutil, it is a generically usefull thing and its small.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 31 insertions, 0 deletions

diff --git a/libavutil/file.c b/libavutil/file.c
index 31a3b7564f..4d14292ba1 100644
--- a/libavutil/file.c
+++ b/libavutil/file.c
@@ -130,6 +130,37 @@ void av_file_unmap(uint8_t *bufptr, size_t size)
 #endif
 }
 
+int av_tempfile(const char *prefix, char **filename) {
+    int fd=-1;
+#if !HAVE_MKSTEMP
+    *filename = tempnam(".", prefix);
+#else
+    size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
+    *filename = av_malloc(len);
+#endif
+    /* -----common section-----*/
+    if (*filename == NULL) {
+        av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
+        return -1;
+    }
+#if !HAVE_MKSTEMP
+    fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
+#else
+    snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
+    fd = mkstemp(*filename);
+    if (fd < 0) {
+        snprintf(*filename, len, "./%sXXXXXX", prefix);
+        fd = mkstemp(*filename);
+    }
+#endif
+    /* -----common section-----*/
+    if (fd < 0) {
+        av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
+        return -1;
+    }
+    return fd; /* success */
+}
+
 #ifdef TEST
 
 #undef printf