From cb7abfb92d2c1fba40c686f28ab55f8a8fa931eb Mon Sep 17 00:00:00 2001
From: Tom Ryder <tom@sanctum.geek.nz>
Date: Fri, 27 May 2016 09:17:43 +1200
Subject: Use implicit NULL tests

---
 ls.c     | 4 ++--
 pwd.c    | 2 +-
 sort.c   | 4 ++--
 whoami.c | 2 +-
 4 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/ls.c b/ls.c
index fbd05be..aabb305 100644
--- a/ls.c
+++ b/ls.c
@@ -12,13 +12,13 @@ int main(int argc, char **argv)
         dirname = ".";
     }
 
-    if ((dir = opendir(dirname)) == NULL) {
+    if (!(dir = opendir(dirname))) {
         perror("opendir");
         free(dir);
         exit(EXIT_FAILURE);
     }
 
-    while ((dirent = readdir(dir)) != NULL) {
+    while ((dirent = readdir(dir))) {
         fprintf(stdout, "%s\n", dirent->d_name);
     }
     if (errno) {
diff --git a/pwd.c b/pwd.c
index 13aeb06..3c6af52 100644
--- a/pwd.c
+++ b/pwd.c
@@ -3,7 +3,7 @@
 int main(void)
 {
     char buf[PATH_MAX];
-    if (getcwd(buf, sizeof(buf)) == NULL) {
+    if (!getcwd(buf, sizeof(buf))) {
         perror("getcwd");
         exit(EXIT_FAILURE);
     }
diff --git a/sort.c b/sort.c
index a5c09b1..ee4949d 100644
--- a/sort.c
+++ b/sort.c
@@ -7,7 +7,7 @@ int main(void) {
 
     lines = vec_init();
 
-    while ((line = read_line(stdin)) != NULL) {
+    while ((line = read_line(stdin))) {
         vec_add(lines, line);
     }
     free(line);
@@ -34,7 +34,7 @@ char *read_line(FILE* stream) {
 
     buf = malloc(BUF_SIZE);
     for (;;) {
-        if (fgets(buf, BUF_SIZE, stream) == NULL) {
+        if (!fgets(buf, BUF_SIZE, stream)) {
             free(buf);
             free(line);
             return NULL;
diff --git a/whoami.c b/whoami.c
index 8b3484b..3d1cae9 100644
--- a/whoami.c
+++ b/whoami.c
@@ -3,7 +3,7 @@
 int main(void) {
     struct passwd *p;
 
-    if ((p = getpwuid(getuid())) == NULL) {
+    if (!(p = getpwuid(getuid()))) {
         exit(EXIT_FAILURE);
     }
 
-- 
cgit v1.2.3