properly handle return codes

Signed-off-by: John Crispin <blogic@openwrt.org>

3 files changed, 8 insertions, 6 deletions

diff --git a/src/odhcp6c.c b/src/odhcp6c.c
index 8b5cb54..dce1e0e 100644
--- a/src/odhcp6c.c
+++ b/src/odhcp6c.c
@@ -445,7 +445,7 @@ static int usage(void)
 	"	-e		Write logmessages to stderr\n"
 	"	-v		Increase logging verbosity\n"
 	"	-h		Show this help\n\n";
-	write(STDERR_FILENO, buf, sizeof(buf));
+	fputs(buf, stderr);
 	return 1;
 }
 
@@ -654,9 +654,9 @@ uint32_t odhcp6c_elapsed(void)
 }
 
 
-void odhcp6c_random(void *buf, size_t len)
+int odhcp6c_random(void *buf, size_t len)
 {
-	read(urandom_fd, buf, len);
+	return read(urandom_fd, buf, len);
 }
 
 bool odhcp6c_is_bound(void)
diff --git a/src/odhcp6c.h b/src/odhcp6c.h
index 1fda72a..3e2713e 100644
--- a/src/odhcp6c.h
+++ b/src/odhcp6c.h
@@ -325,7 +325,7 @@ void script_call(const char *status);
 
 bool odhcp6c_signal_process(void);
 uint64_t odhcp6c_get_milli_time(void);
-void odhcp6c_random(void *buf, size_t len);
+int odhcp6c_random(void *buf, size_t len);
 bool odhcp6c_is_bound(void);
 
 // State manipulation
diff --git a/src/ra.c b/src/ra.c
index 9541624..09d5c1d 100644
--- a/src/ra.c
+++ b/src/ra.c
@@ -165,14 +165,16 @@ static int16_t pref_to_priority(uint8_t flags)
 }
 
 
-static void update_proc(const char *sect, const char *opt, uint32_t value)
+static int update_proc(const char *sect, const char *opt, uint32_t value)
 {
 	char buf[64];
 	snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/%s/%s/%s", sect, if_name, opt);
 
 	int fd = open(buf, O_WRONLY);
-	write(fd, buf, snprintf(buf, sizeof(buf), "%u", value));
+	int ret = write(fd, buf, snprintf(buf, sizeof(buf), "%u", value));
 	close(fd);
+
+	return ret;
 }