use 0 instead of NULL for null pointer constants

and thereby remove otherwise-unnecessary inclusion of stddef.h

diff --git a/src/signal/sighold.c b/src/signal/sighold.c
index 992812f..cfa2306 100644 (file)
--- a/src/signal/sighold.c
+++ b/src/signal/sighold.c
@@ -1,5 +1,4 @@
 #include <signal.h>
-#include <stddef.h>
 
 int sighold(int sig)
 {
@@ -7,5 +6,5 @@ int sighold(int sig)
 
        sigemptyset(&mask);
        if (sigaddset(&mask, sig) < 0) return -1;
-       return sigprocmask(SIG_BLOCK, &mask, NULL);
+       return sigprocmask(SIG_BLOCK, &mask, 0);
 }

diff --git a/src/signal/sigignore.c b/src/signal/sigignore.c
index 78bd747..5ba05e1 100644 (file)
--- a/src/signal/sigignore.c
+++ b/src/signal/sigignore.c
@@ -1,5 +1,4 @@
 #include <signal.h>
-#include <stddef.h>
 
 int sigignore(int sig)
 {
@@ -8,5 +7,5 @@ int sigignore(int sig)
        sigemptyset(&sa.sa_mask);
        sa.sa_handler = SIG_IGN;
        sa.sa_flags = 0;
-       return sigaction(sig, &sa, NULL);
+       return sigaction(sig, &sa, 0);
 }

diff --git a/src/signal/siginterrupt.c b/src/signal/siginterrupt.c
index 94f92be..7006340 100644 (file)
--- a/src/signal/siginterrupt.c
+++ b/src/signal/siginterrupt.c
@@ -1,13 +1,12 @@
-#include <stddef.h>
 #include <signal.h>
 
 int siginterrupt(int sig, int flag)
 {
        struct sigaction sa;
 
-       sigaction(sig, NULL, &sa);
+       sigaction(sig, 0, &sa);
        if (flag) sa.sa_flags &= ~SA_RESTART;
        else sa.sa_flags |= SA_RESTART;
 
-       return sigaction(sig, &sa, NULL);
+       return sigaction(sig, &sa, 0);
 }

diff --git a/src/signal/sigrelse.c b/src/signal/sigrelse.c
index 31c1a03..b4c5a00 100644 (file)
--- a/src/signal/sigrelse.c
+++ b/src/signal/sigrelse.c
@@ -1,5 +1,4 @@
 #include <signal.h>
-#include <stddef.h>
 
 int sigrelse(int sig)
 {
@@ -7,5 +6,5 @@ int sigrelse(int sig)
 
        sigemptyset(&mask);
        if (sigaddset(&mask, sig) < 0) return -1;
-       return sigprocmask(SIG_UNBLOCK, &mask, NULL);
+       return sigprocmask(SIG_UNBLOCK, &mask, 0);
 }

diff --git a/src/signal/sigset.c b/src/signal/sigset.c
index cbe4628..0d7b456 100644 (file)
--- a/src/signal/sigset.c
+++ b/src/signal/sigset.c
@@ -1,5 +1,4 @@
 #include <signal.h>
-#include <stddef.h>
 
 void (*sigset(int sig, void (*handler)(int)))(int)
 {
@@ -11,7 +10,7 @@ void (*sigset(int sig, void (*handler)(int)))(int)
                return SIG_ERR;
        
        if (handler == SIG_HOLD) {
-               if (sigaction(sig, NULL, &sa_old) < 0)
+               if (sigaction(sig, 0, &sa_old) < 0)
                        return SIG_ERR;
                if (sigprocmask(SIG_BLOCK, &mask, &mask) < 0)
                        return SIG_ERR;

diff --git a/src/signal/sigwait.c b/src/signal/sigwait.c
index 48a855b..c8822ee 100644 (file)
--- a/src/signal/sigwait.c
+++ b/src/signal/sigwait.c
@@ -1,10 +1,9 @@
 #include <signal.h>
-#include <stddef.h>
 
 int sigwait(const sigset_t *restrict mask, int *restrict sig)
 {
        siginfo_t si;
-       if (sigtimedwait(mask, &si, NULL) < 0)
+       if (sigtimedwait(mask, &si, 0) < 0)
                return -1;
        *sig = si.si_signo;
        return 0;

diff --git a/src/signal/sigwaitinfo.c b/src/signal/sigwaitinfo.c
index c7b164d..bb51f8b 100644 (file)
--- a/src/signal/sigwaitinfo.c
+++ b/src/signal/sigwaitinfo.c
@@ -1,7 +1,6 @@
 #include <signal.h>
-#include <stddef.h>
 
 int sigwaitinfo(const sigset_t *restrict mask, siginfo_t *restrict si)
 {
-       return sigtimedwait(mask, si, NULL);
+       return sigtimedwait(mask, si, 0);
 }