Clean up compiler warnings from overly pedantic checking.

4 files changed, 14 insertions, 7 deletions

diff --git a/client.c b/client.c
index d599d1bb..3fd0aecd 100644
--- a/client.c
+++ b/client.c
@@ -217,7 +217,8 @@ daemonise(struct if_state *state, const struct options *options)
 			setsid();
 			/* Notify parent it's safe to exit as we've detached. */
 			close(sidpipe[0]);
-			write(sidpipe[1], &buf, 1);
+			if (write(sidpipe[1], &buf, 1) != 1)
+				logger(LOG_ERR, "write: %s", strerror(errno));
 			close(sidpipe[1]);
 			close_fds();
 			break;
@@ -226,7 +227,8 @@ daemonise(struct if_state *state, const struct options *options)
 			signal_reset();
 			/* Wait for child to detach */
 			close(sidpipe[1]);
-			read(sidpipe[0], &buf, 1);
+			if (read(sidpipe[0], &buf, 1) != 1)
+				logger(LOG_ERR, "read: %s", strerror(errno));
 			close(sidpipe[0]);
 			break;
 	}
diff --git a/common.c b/common.c
index 3e8d92e2..da22a5cd 100644
--- a/common.c
+++ b/common.c
@@ -69,7 +69,8 @@ get_line(char **line, size_t *len, FILE *fp)
 		}
 		p = *line + last;
 		memset(p, 0, BUFSIZ);
-		fgets(p, BUFSIZ, fp);
+		if (fgets(p, BUFSIZ, fp) == NULL)
+			break;
 		last += strlen(p);
 		if (last && (*line)[last - 1] == '\n') {
 			(*line)[last - 1] = '\0';
diff --git a/dhcpcd.c b/dhcpcd.c
index 9e03605c..1c35491c 100644
--- a/dhcpcd.c
+++ b/dhcpcd.c
@@ -137,14 +137,15 @@ static pid_t
 read_pid(const char *pidfile)
 {
 	FILE *fp;
-	pid_t pid = 0;
+	pid_t pid;
 
 	if ((fp = fopen(pidfile, "r")) == NULL) {
 		errno = ENOENT;
 		return 0;
 	}
 
-	fscanf(fp, "%d", &pid);
+	if (fscanf(fp, "%d", &pid) != 1)
+		pid = 0;
 	fclose(fp);
 
 	return pid;
@@ -878,7 +879,8 @@ main(int argc, char **argv)
 		goto abort;
 	}
 
-	chdir("/");
+	if (chdir("/") == -1)
+		logger(LOG_ERR, "chdir `/': %s", strerror(errno));
 	umask(022);
 
 	if (sig != 0 && !(options->options & DHCPCD_DAEMONISED)) {
diff --git a/signals.c b/signals.c
index 58679d63..daf03476 100644
--- a/signals.c
+++ b/signals.c
@@ -31,6 +31,7 @@
 #include <errno.h>
 #include <signal.h>
 #include <string.h>
+#include <syslog.h>
 #include <unistd.h>
 
 #include "common.h"
@@ -50,7 +51,8 @@ signal_handler(int sig)
 {
 	int serrno = errno;
 
-	write(signal_pipe[1], &sig, sizeof(sig));
+	if (write(signal_pipe[1], &sig, sizeof(sig)) != sizeof(sig))
+		syslog(LOG_ERR, "write signal %d: %s", sig, strerror(errno));
 	/* Restore errno */
 	errno = serrno;
 }