move back to c99

Makefile

@@ -2,7 +2,7 @@ CC = gcc
 
 INCFLAGS  = -Isrc
 
-CCFLAGS  = -std=gnu99 -Wall -Wextra -pedantic -O2
+CCFLAGS  = -std=c99 -Wall -Wextra -pedantic -O2 -D_DEFAULT_SOURCE
 CCFLAGS += $(INCFLAGS)
 
 LDFLAGS += $(INCFLAGS)

src/command.h

@@ -3,6 +3,13 @@
 #include <stdint.h>
 #include <stdlib.h>
 #include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
 
 #define ARGUMENTS int argc, char** argv
 #define NEXT_ARGS argc - 1, &argv[1]

src/commands/cat.c

@@ -1,10 +1,6 @@
 #include "../command.h"
 
 #include <ctype.h>
-#include <errno.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/stat.h>
 
 struct Flags {
     bool number_lines;

src/commands/dd.c

@@ -1,5 +1,4 @@
 #include "../command.h"
-#include <stdio.h>
 
 static void help() {
     printf("Usage: dd [if=FILE] [of=FILE] [bs=N] [count=N]\n\n");

src/commands/echo.c

@@ -1,8 +1,5 @@
 #include "../command.h"
 
-#include <stdio.h>
-#include <string.h>
-
 static void print_with_escape_codes(const char* str) {
     
     size_t index = 0;

src/commands/ed.c

@@ -1,11 +1,6 @@
 #include "../command.h"
 #include "../util//regex.h"
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
 #define INPUT_LEN 1024
 
 static char** lines = NULL;

src/commands/groups.c

@@ -2,7 +2,6 @@
 
 #include <grp.h>
 #include <pwd.h>
-#include <unistd.h>
 
 COMMAND_EMPTY(groups) {
 

src/commands/head.c

@@ -1,8 +1,5 @@
 #include "../command.h"
 
-#include <stdio.h>
-#include <string.h>
-
 struct Flags {
     int count;
     bool lines;

src/commands/id.c

@@ -2,8 +2,6 @@
 
 #include <grp.h>
 #include <pwd.h>
-#include <unistd.h>
-#include <sys/types.h>
 
 COMMAND_EMPTY(user_id) {
 

src/commands/ls.c

@@ -1,13 +1,7 @@
 #include "../command.h"
 
-#include <errno.h>
 #include <grp.h>
 #include <pwd.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/ioctl.h>
-#include <unistd.h>
 #include <dirent.h>
 #include <ftw.h>
 #include <limits.h>

src/commands/printf.c

@@ -1,5 +1,4 @@
 #include "../command.h"
-#include <stdlib.h>
 
 static long cast_long(const char* arg) {
     char* end;

src/commands/tail.c

@@ -1,11 +1,5 @@
 #include "../command.h"
 
-#include <stdio.h>
-#include <string.h>
-#include <sys/select.h>
-#include <sys/stat.h>
-#include <unistd.h>
-
 struct Flags {
     bool lines;
     int count;

src/commands/tee.c

@@ -1,9 +1,6 @@
 #include "../command.h"
 
 #include <signal.h>
-#include <stdio.h>
-#include <string.h>
-
 
 static void help() {
     printf("Usage: tee [-ai] [FILE]...\n\n");

src/commands/wc.c

@@ -1,8 +1,6 @@
 #include "../command.h"
 
 #include <ctype.h>
-#include <stdio.h>
-#include <string.h>
 
 struct Flags {
     bool newlines;

src/commands/whoami.c

@@ -1,8 +1,6 @@
 #include "../command.h"
 
 #include <pwd.h>
-#include <sys/types.h>
-#include <unistd.h>
 
 static void help() {
     printf("Usage: whoami\n\n");