Use initalization instead of explicit zeroing in more places

4 files changed, 20 insertions, 36 deletions

diff --git a/src/bootchart/bootchart.c b/src/bootchart/bootchart.c
index 208c4528e7..288148f483 100644
--- a/src/bootchart/bootchart.c
+++ b/src/bootchart/bootchart.c
@@ -239,7 +239,9 @@ static int parse_args(int argc, char *argv[]) {
 
 int main(int argc, char *argv[]) {
         _cleanup_free_ char *build = NULL;
-        struct sigaction sig;
+        struct sigaction sig = {
+                .sa_handler = signal_handler,
+        };
         struct ps_struct *ps;
         char output_file[PATH_MAX];
         char datestr[200];
@@ -279,8 +281,6 @@ int main(int argc, char *argv[]) {
         }
 
         /* handle TERM/INT nicely */
-        memset(&sig, 0, sizeof(struct sigaction));
-        sig.sa_handler = signal_handler;
         sigaction(SIGHUP, &sig, NULL);
 
         interval = (1.0 / arg_hz) * 1000000000.0;
diff --git a/src/bootchart/svg.c b/src/bootchart/svg.c
index a4086c5227..3472bc0ae8 100644
--- a/src/bootchart/svg.c
+++ b/src/bootchart/svg.c
@@ -978,12 +978,11 @@ static void svg_ps_bars(void) {
 
 static void svg_top_ten_cpu(void) {
         struct ps_struct *top[10];
-        struct ps_struct emptyps;
+        struct ps_struct emptyps = {};
         struct ps_struct *ps;
         int n, m;
 
-        memset(&emptyps, 0, sizeof(struct ps_struct));
-        for (n=0; n < 10; n++)
+        for (n = 0; n < (int) ELEMENTSOF(top); n++)
                 top[n] = &emptyps;
 
         /* walk all ps's and setup ptrs */
@@ -1011,12 +1010,11 @@ static void svg_top_ten_cpu(void) {
 
 static void svg_top_ten_pss(void) {
         struct ps_struct *top[10];
-        struct ps_struct emptyps;
+        struct ps_struct emptyps = {};
         struct ps_struct *ps;
         int n, m;
 
-        memset(&emptyps, 0, sizeof(struct ps_struct));
-        for (n=0; n < 10; n++)
+        for (n = 0; n < (int) ELEMENTSOF(top); n++)
                 top[n] = &emptyps;
 
         /* walk all ps's and setup ptrs */
diff --git a/src/libsystemd-daemon/sd-daemon.c b/src/libsystemd-daemon/sd-daemon.c
index 9cc1c37b46..41f4b588df 100644
--- a/src/libsystemd-daemon/sd-daemon.c
+++ b/src/libsystemd-daemon/sd-daemon.c
@@ -278,11 +278,8 @@ _sd_export_ int sd_is_socket(int fd, int family, int type, int listening) {
                 return r;
 
         if (family > 0) {
-                union sockaddr_union sockaddr;
-                socklen_t l;
-
-                memset(&sockaddr, 0, sizeof(sockaddr));
-                l = sizeof(sockaddr);
+                union sockaddr_union sockaddr = {};
+                socklen_t l = sizeof(sockaddr);
 
                 if (getsockname(fd, &sockaddr.sa, &l) < 0)
                         return -errno;
@@ -297,8 +294,8 @@ _sd_export_ int sd_is_socket(int fd, int family, int type, int listening) {
 }
 
 _sd_export_ int sd_is_socket_inet(int fd, int family, int type, int listening, uint16_t port) {
-        union sockaddr_union sockaddr;
-        socklen_t l;
+        union sockaddr_union sockaddr = {};
+        socklen_t l = sizeof(sockaddr);
         int r;
 
         if (family != 0 && family != AF_INET && family != AF_INET6)
@@ -308,9 +305,6 @@ _sd_export_ int sd_is_socket_inet(int fd, int family, int type, int listening, u
         if (r <= 0)
                 return r;
 
-        memset(&sockaddr, 0, sizeof(sockaddr));
-        l = sizeof(sockaddr);
-
         if (getsockname(fd, &sockaddr.sa, &l) < 0)
                 return -errno;
 
@@ -343,17 +337,14 @@ _sd_export_ int sd_is_socket_inet(int fd, int family, int type, int listening, u
 }
 
 _sd_export_ int sd_is_socket_unix(int fd, int type, int listening, const char *path, size_t length) {
-        union sockaddr_union sockaddr;
-        socklen_t l;
+        union sockaddr_union sockaddr = {};
+        socklen_t l = sizeof(sockaddr);
         int r;
 
         r = sd_is_socket_internal(fd, type, listening);
         if (r <= 0)
                 return r;
 
-        memset(&sockaddr, 0, sizeof(sockaddr));
-        l = sizeof(sockaddr);
-
         if (getsockname(fd, &sockaddr.sa, &l) < 0)
                 return -errno;
 
diff --git a/src/nss-myhostname/nss-myhostname.c b/src/nss-myhostname/nss-myhostname.c
index b0fb8323ad..2dd3d4a57c 100644
--- a/src/nss-myhostname/nss-myhostname.c
+++ b/src/nss-myhostname/nss-myhostname.c
@@ -32,6 +32,8 @@
 #include <arpa/inet.h>
 
 #include "ifconf.h"
+#include "macro.h"
+#include "util.h"
 
 /* We use 127.0.0.2 as IPv4 address. This has the advantage over
  * 127.0.0.1 that it can be translated back to the local hostname. For
@@ -42,8 +44,6 @@
 #define LOCALADDRESS_IPV6 &in6addr_loopback
 #define LOOPBACK_INTERFACE "lo"
 
-#define ALIGN(a) (((a+sizeof(void*)-1)/sizeof(void*))*sizeof(void*))
-
 enum nss_status _nss_myhostname_gethostbyname4_r(
                 const char *name,
                 struct gaih_addrtuple **pat,
@@ -96,14 +96,13 @@ enum nss_status _nss_myhostname_gethostbyname4_r(
                 int32_t *ttlp) {
 
         unsigned lo_ifi;
-        char hn[HOST_NAME_MAX+1];
+        char hn[HOST_NAME_MAX+1] = {};
         size_t l, idx, ms;
         char *r_name;
         struct gaih_addrtuple *r_tuple, *r_tuple_prev = NULL;
         struct address *addresses = NULL, *a;
         unsigned n_addresses = 0, n;
 
-        memset(hn, 0, sizeof(hn));
         if (gethostname(hn, sizeof(hn)-1) < 0) {
                 *errnop = errno;
                 *h_errnop = NO_RECOVERY;
@@ -312,7 +311,7 @@ enum nss_status _nss_myhostname_gethostbyname3_r(
                 int32_t *ttlp,
                 char **canonp) {
 
-        char hn[HOST_NAME_MAX+1];
+        char hn[HOST_NAME_MAX+1] = {};
 
         if (af == AF_UNSPEC)
                 af = AF_INET;
@@ -323,7 +322,6 @@ enum nss_status _nss_myhostname_gethostbyname3_r(
                 return NSS_STATUS_UNAVAIL;
         }
 
-        memset(hn, 0, sizeof(hn));
         if (gethostname(hn, sizeof(hn)-1) < 0) {
                 *errnop = errno;
                 *h_errnop = NO_RECOVERY;
@@ -380,8 +378,9 @@ enum nss_status _nss_myhostname_gethostbyaddr2_r(
                 int *errnop, int *h_errnop,
                 int32_t *ttlp) {
 
-        char hn[HOST_NAME_MAX+1];
-        struct address *addresses = NULL, *a;
+        char hn[HOST_NAME_MAX+1] = {};
+        struct address _cleanup_free_ *addresses = NULL;
+        struct address *a;
         unsigned n_addresses = 0, n;
 
         if (len != PROTO_ADDRESS_SIZE(af)) {
@@ -419,13 +418,9 @@ enum nss_status _nss_myhostname_gethostbyaddr2_r(
         *errnop = ENOENT;
         *h_errnop = HOST_NOT_FOUND;
 
-        free(addresses);
         return NSS_STATUS_NOTFOUND;
 
 found:
-        free(addresses);
-
-        memset(hn, 0, sizeof(hn));
         if (gethostname(hn, sizeof(hn)-1) < 0) {
                 *errnop = errno;
                 *h_errnop = NO_RECOVERY;