From 46ebfbb6eb9966239f7826e002d99554420bbbc8 Mon Sep 17 00:00:00 2001
From: Guus Sliepen <guus@tinc-vpn.org>
Date: Thu, 14 Apr 2016 17:29:25 +0200
Subject: [PATCH] Use getcwd() instead of get_current_dir_name().

---
 configure.ac  |  2 +-
 src/dropin.c  | 34 ----------------------------------
 src/tincctl.c |  4 ++--
 3 files changed, 3 insertions(+), 37 deletions(-)

diff --git a/configure.ac b/configure.ac
index 9691fd5b..80bc79b1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -199,7 +199,7 @@ AC_CHECK_TYPES([socklen_t, struct ether_header, struct arphdr, struct ether_arp,
 
 dnl Checks for library functions.
 AC_TYPE_SIGNAL
-AC_CHECK_FUNCS([asprintf daemon fchmod flock ftime fork get_current_dir_name gettimeofday mlockall putenv random recvmmsg select strdup strsignal nanosleep unsetenv vsyslog devname fdevname],
+AC_CHECK_FUNCS([asprintf daemon fchmod flock ftime fork gettimeofday mlockall putenv random recvmmsg select strdup strsignal nanosleep unsetenv vsyslog devname fdevname],
   [], [], [#include "$srcdir/src/have.h"]
 )
 
diff --git a/src/dropin.c b/src/dropin.c
index a2297557..fe3b7ef2 100644
--- a/src/dropin.c
+++ b/src/dropin.c
@@ -86,40 +86,6 @@ int daemon(int nochdir, int noclose) {
 }
 #endif
 
-#ifndef HAVE_GET_CURRENT_DIR_NAME
-/*
-  Replacement for the GNU get_current_dir_name function:
-
-  get_current_dir_name will malloc(3) an array big enough to hold the
-  current directory name.  If the environment variable PWD is set, and
-  its value is correct, then that value will be returned.
-*/
-char *get_current_dir_name(void) {
-	size_t size;
-	char *buf;
-	char *r;
-
-	/* Start with 100 bytes.  If this turns out to be insufficient to
-	   contain the working directory, double the size.  */
-	size = 100;
-	buf = xmalloc(size);
-
-	errno = 0;                                      /* Success */
-	r = getcwd(buf, size);
-
-	/* getcwd returns NULL and sets errno to ERANGE if the bufferspace
-	   is insufficient to contain the entire working directory.  */
-	while(r == NULL && errno == ERANGE) {
-		free(buf);
-		size <<= 1;                             /* double the size */
-		buf = xmalloc(size);
-		r = getcwd(buf, size);
-	}
-
-	return buf;
-}
-#endif
-
 #ifndef HAVE_ASPRINTF
 int asprintf(char **buf, const char *fmt, ...) {
 	int result;
diff --git a/src/tincctl.c b/src/tincctl.c
index 1eb98180..9687ba4b 100644
--- a/src/tincctl.c
+++ b/src/tincctl.c
@@ -330,7 +330,7 @@ static void disable_old_keys(const char *filename, const char *what) {
 
 static FILE *ask_and_open(const char *filename, const char *what, const char *mode, bool ask, mode_t perms) {
 	FILE *r;
-	char *directory;
+	char directory[PATH_MAX] = ".";
 	char buf[PATH_MAX];
 	char buf2[PATH_MAX];
 
@@ -358,7 +358,7 @@ static FILE *ask_and_open(const char *filename, const char *what, const char *mo
 	if(filename[0] != '/') {
 #endif
 		/* The directory is a relative path or a filename. */
-		directory = get_current_dir_name();
+		getcwd(directory, sizeof directory);
 		snprintf(buf2, sizeof buf2, "%s" SLASH "%s", directory, filename);
 		filename = buf2;
 	}
-- 
2.20.1