From acd018074972f9c13ffecffb618f799d914bbe97 Mon Sep 17 00:00:00 2001
From: Guus Sliepen <guus@tinc-vpn.org>
Date: Sat, 7 Oct 2017 16:54:52 +0200
Subject: [PATCH] Use getcwd() instead of get_current_dir_name().

---
 configure.ac |  2 +-
 src/conf.c   |  5 ++---
 src/dropin.c | 34 ----------------------------------
 3 files changed, 3 insertions(+), 38 deletions(-)

diff --git a/configure.ac b/configure.ac
index f25ec2b5..ce2c1259 100644
--- a/configure.ac
+++ b/configure.ac
@@ -207,7 +207,7 @@ 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 fork get_current_dir_name gettimeofday mlockall pselect putenv strsignal system unsetenv usleep vsyslog devname fdevname],
+AC_CHECK_FUNCS([asprintf daemon fchmod flock fork gettimeofday mlockall pselect putenv strsignal system unsetenv usleep vsyslog devname fdevname],
   [], [], [#include "$srcdir/src/have.h"]
 )
 
diff --git a/src/conf.c b/src/conf.c
index 2e13e456..1c250d7b 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -485,7 +485,7 @@ static void disable_old_keys(const char *filename) {
 
 FILE *ask_and_open(const char *filename, const char *what) {
 	FILE *r;
-	char *directory;
+	char directory[PATH_MAX];
 	char line[PATH_MAX];
 	char abspath[PATH_MAX];
 	const char *fn;
@@ -521,9 +521,8 @@ FILE *ask_and_open(const char *filename, const char *what) {
 	if(fn[0] != '/') {
 #endif
 		/* The directory is a relative path or a filename. */
-		directory = get_current_dir_name();
+		getcwd(directory, sizeof directory);
 		snprintf(abspath, sizeof abspath, "%s/%s", directory, fn);
-		free(directory);
 		fn = abspath;
 	}
 
diff --git a/src/dropin.c b/src/dropin.c
index a99c828f..49d56624 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;
-- 
2.20.1