Fix `puttygen-unix-perms': f_open(), PuTTY's wrapper on fopen, now

[u/mdw/putty] / unix / uxmisc.c

diff --git a/unix/uxmisc.c b/unix/uxmisc.c
index 74eb156..dc20863 100644 (file)
--- a/unix/uxmisc.c
+++ b/unix/uxmisc.c
@@ -5,6 +5,7 @@
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <assert.h>
 #include <unistd.h>
 #include <sys/time.h>
 #include <sys/types.h>
@@ -133,3 +134,17 @@ int cloexec(int fd) {
     if (fdflags == -1) return -1;
     return fcntl(fd, F_SETFD, fdflags | FD_CLOEXEC);
 }
+
+FILE *f_open(struct Filename filename, char const *mode, int is_private)
+{
+    if (!is_private) {
+       return fopen(filename.path, mode);
+    } else {
+       assert(mode[0] == 'w');        /* is_private is meaningless for read */
+       int fd = open(filename.path, O_WRONLY | O_CREAT | O_TRUNC,
+                     0700);
+       if (fd < 0)
+           return NULL;
+       return fdopen(fd, mode);
+    }
+}