execve and forks ok

microshell.c

@@ -1,14 +1,20 @@
-#include <unistd.h>	// write
-#include <stdio.h>	// printf
-#include <string.h>	// strcmp
+#include <unistd.h>		// write, fork, execve, pipe
+#include <stdio.h>		// printf
+#include <string.h>		// strcmp
+#include <sys/types.h>	// pid_t
+#include <sys/wait.h>	// waitpid
 
-void	print_cmd(char **av, int end)
+#define STDIN	0
+#define STDOUT	1
+#define STDERR	2
+
+void	print_cmd(char **av)
 {
 	int i;
 	int size;
 
 	i = 0;
-	while (i < end)
+	while (av[i])
 	{
 		size = 0;
 		while (av[i][size] != '\0')
@@ -20,7 +26,23 @@ void	print_cmd(char **av, int end)
 	write(1, "\n", 1);
 }
 
-int	main(int ac, char **av)
+//void	exec_cmd(char **av, int end, char **en)
+void	exec_cmd(char **av, char **en)
+{
+	pid_t	pid = fork();
+
+//	av[end] = NULL;
+	if (pid == 0)	// child process
+	{
+		execve(av[0], av, en);
+	}
+	else			// parent process
+	{
+		waitpid(pid, NULL, 0);
+	}
+}
+
+int	main(int ac, char **av, char **en)
 {
 	int i;
 	int start;
@@ -33,9 +55,13 @@ int	main(int ac, char **av)
 		start = i;
 		while (i < ac && strcmp(av[i], "|") && strcmp(av[i], ";"))
 			i++;
-		print_cmd(&av[start], i - start);
+		av[i] = NULL;
+//		print_cmd(&av[start]);
+		exec_cmd(&av[start], en);
 		if (i < ac)
 			i++;
 	}
 	return (0);
 }
+
+// https://www.rozmichelle.com/pipes-forks-dups/