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$NetBSD: patch-ai,v 1.3 2005/03/31 14:17:05 salo Exp $
--- src/uudecode.c.orig 1995-12-02 04:14:14.000000000 +0100
+++ src/uudecode.c 2005-03-31 15:51:27.000000000 +0200
@@ -81,6 +81,9 @@
/* Single character decode. */
#define DEC(Char) (((Char) - ' ') & 077)
+#if !defined S_ISLNK && defined S_IFLNK
+# define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
+#endif
static int
read_stduu (inname)
@@ -279,6 +282,7 @@
char buf[2 * BUFSIZ];
char *outname;
int do_base64 = 0;
+ struct stat attr;
/* Search for header line. */
@@ -337,6 +341,23 @@
}
}
+ /* Check out file if it exists */
+ if (strcmp (outname, "/dev/stdout") != 0 && strcmp (outname, "-") != 0
+ && !access(outname, F_OK)) {
+ if (lstat(outname, &attr) == -1) {
+ error (0, errno, _("cannot access %s"), outname);
+ return 1;
+ }
+ if (S_ISFIFO(attr.st_mode)){
+ error (0, errno, _("denied writing FIFO (%s)"), outname);
+ return 1;
+ }
+ if (S_ISLNK(attr.st_mode)) {
+ error (0, errno, _("not following symlink (%s)"), outname);
+ return 1;
+ }
+ }
+
/* Create output file and set mode. */
if (strcmp (outname, "/dev/stdout") != 0 && strcmp (outname, "-") != 0
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