libc: replace 0 with NULL for pointers.

While here also cleanup some surrounding code; particularly
drop some malloc() casts.

Found with devel/coccinelle.

Reviewed by:	bde (previous version - all new bugs are mine)

4 files changed, 13 insertions, 13 deletions

diff --git a/lib/libc/rpc/auth_none.c b/lib/libc/rpc/auth_none.c
index 0b846ebc9b18..32bebebf339d 100644
--- a/lib/libc/rpc/auth_none.c
+++ b/lib/libc/rpc/auth_none.c
@@ -83,9 +83,9 @@ authnone_create(void)
 	XDR *xdrs;
 
 	mutex_lock(&authnone_lock);
-	if (ap == 0) {
-		ap = (struct authnone_private *)calloc(1, sizeof (*ap));
-		if (ap == 0) {
+	if (ap == NULL) {
+		ap = calloc(1, sizeof (*ap));
+		if (ap == NULL) {
 			mutex_unlock(&authnone_lock);
 			return (0);
 		}
diff --git a/lib/libc/rpc/clnt_perror.c b/lib/libc/rpc/clnt_perror.c
index 15d72803df71..d674fbb3847f 100644
--- a/lib/libc/rpc/clnt_perror.c
+++ b/lib/libc/rpc/clnt_perror.c
@@ -64,8 +64,8 @@ static char *
 _buf(void)
 {
 
-	if (buf == 0)
-		buf = (char *)malloc(CLNT_PERROR_BUFLEN);
+	if (buf == NULL)
+		buf = malloc(CLNT_PERROR_BUFLEN);
 	return (buf);
 }
 
@@ -85,7 +85,7 @@ clnt_sperror(CLIENT *rpch, const char *s)
 	assert(s != NULL);
 
 	str = _buf(); /* side effect: sets CLNT_PERROR_BUFLEN */
-	if (str == 0)
+	if (str == NULL)
 		return (0);
 	len = CLNT_PERROR_BUFLEN;
 	strstart = str;
@@ -240,7 +240,7 @@ clnt_spcreateerror(const char *s)
 	assert(s != NULL);
 
 	str = _buf(); /* side effect: sets CLNT_PERROR_BUFLEN */
-	if (str == 0)
+	if (str == NULL)
 		return(0);
 	len = CLNT_PERROR_BUFLEN;
 	i = snprintf(str, len, "%s: ", s);
diff --git a/lib/libc/rpc/mt_misc.c b/lib/libc/rpc/mt_misc.c
index 0ec4d8a8b79d..a1b8057bef80 100644
--- a/lib/libc/rpc/mt_misc.c
+++ b/lib/libc/rpc/mt_misc.c
@@ -95,7 +95,7 @@ rce_key_init(void)
 struct rpc_createerr *
 __rpc_createerr(void)
 {
-	struct rpc_createerr *rce_addr = 0;
+	struct rpc_createerr *rce_addr = NULL;
 
 	if (thr_main())
 		return (&rpc_createerr);
diff --git a/lib/libc/rpc/rpcdname.c b/lib/libc/rpc/rpcdname.c
index f214b2122d5d..08b5d7d49fc5 100644
--- a/lib/libc/rpc/rpcdname.c
+++ b/lib/libc/rpc/rpcdname.c
@@ -43,20 +43,20 @@ __FBSDID("$FreeBSD$");
 #include <string.h>
 #include "un-namespace.h"
 
-static char *default_domain = 0;
+static char *default_domain;
 
 static char *
 get_default_domain(void)
 {
 	char temp[256];
 
-	if (default_domain)
+	if (default_domain != NULL)
 		return (default_domain);
 	if (getdomainname(temp, sizeof(temp)) < 0)
 		return (0);
 	if ((int) strlen(temp) > 0) {
-		default_domain = (char *)malloc((strlen(temp)+(unsigned)1));
-		if (default_domain == 0)
+		default_domain = malloc((strlen(temp) + (unsigned)1));
+		if (default_domain == NULL)
 			return (0);
 		(void) strcpy(default_domain, temp);
 		return (default_domain);
@@ -73,7 +73,7 @@ get_default_domain(void)
 int
 __rpc_get_default_domain(char **domain)
 {
-	if ((*domain = get_default_domain()) != 0)
+	if ((*domain = get_default_domain()) != NULL)
 		return (0);
 	return (-1);
 }