1 files changed, 70 insertions, 0 deletions
diff --git a/src/sed/lib/mkstemp.c b/src/sed/lib/mkstemp.c
new file mode 100644
index 0000000..5b00205
--- /dev/null
+++ b/src/sed/lib/mkstemp.c
@@ -0,0 +1,70 @@
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#else
+# include <string.h>
+#endif /* HAVE_STRINGS_H */
+
+#ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+#endif /* HAVE_STDLIB_H */
+
+#ifdef HAVE_SYS_FILE_H
+# include <sys/file.h>
+#endif /* HAVE_SYS_FILE_H */
+
+#ifdef HAVE_IO_H
+# include <io.h>
+#endif /* HAVE_IO_H */
+
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif /* HAVE_FCNTL_H */
+
+#include <limits.h>
+#include <errno.h>
+
+/* Generate a unique temporary file name from template.  The last six characters of
+   template must be XXXXXX and these are replaced with a string that makes the
+   filename unique. */
+
+int
+mkstemp (template)
+     char *template;
+{
+  int i, j, n, fd;
+  char *data = template + strlen(template) - 6;
+
+  if (data < template) {
+    errno = EINVAL;
+    return -1;
+  }
+
+  for (n = 0; n <= 5; n++)
+    if (data[n] != 'X') {
+      errno = EINVAL;
+      return -1;
+    }
+
+  for (i = 0; i < INT_MAX; i++) {
+    j = i ^ 827714841;             /* Base 36 DOSSUX :-) */
+    for (n = 5; n >= 0; n--) {
+      data[n] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" [j % 36];
+      j /= 36;
+    }
+
+    fd = open (template, O_CREAT|O_EXCL|O_RDWR, 0600);
+    if (fd != -1)
+      return fd;
+  }
+    
+  errno = EEXIST;
+  return -1;
+}