execve(2) not quite working

1 files changed, 86 insertions, 0 deletions

diff --git a/src/ft_e_externs.c b/src/ft_e_externs.c
index dbbaceb..aa67d9a 100644
--- a/src/ft_e_externs.c
+++ b/src/ft_e_externs.c
@@ -10,10 +10,93 @@
 /*                                                                            */
 /* ************************************************************************** */
 
+#include <sys/wait.h>
 #include <libft.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
 
+#include "ft_f_file.h"
 #include "ft_e_externs_next.h"
+#include "ft_s_lcom.h"
 #include "ft_s_struct.h"
+#include "ft_s_destroy.h"
+
+static void
+	ft_dup_redirs(const t_lcom *ptr,
+				t_msh *msh)
+{
+	int32_t	fd;
+
+	if (ptr->redir == -1)
+	{
+		if ((fd = open(ptr->rdrpath, O_RDONLY)) == -1)
+			ft_f_file(ptr->rdrpath, msh);
+		/* TODO: handle < redir */
+	}
+	if (ptr->redir == 1)
+	{
+		if ((fd = open(ptr->rdrpath,
+					   O_CREAT | O_TRUNC | O_WRONLY, 0644)) == -1)
+			ft_f_file(ptr->rdrpath, msh);
+		dup2(fd, STDOUT_FILENO);
+		close(fd);
+	}
+	if (ptr->redir == 2)
+	{
+		if ((fd = open(ptr->rdrpath,
+					   O_CREAT | O_APPEND | O_WRONLY, 0644)) == -1)
+			ft_f_file(ptr->rdrpath, msh);
+		dup2(fd, STDOUT_FILENO);
+		close(fd);
+	}
+}
+
+static void
+ft_e_extern_child(const char *fullpath,
+				t_lcom *ptr,
+				t_msh *msh)
+{
+	int32_t	ret;
+	char arg[2][256];
+
+	ft_strlcpy(arg[0], "/bin/ls -l", ft_strlen("/bin/ls -l"));
+	arg[0][2] = '\0';
+	arg[1][0] = 0;
+	(void)fullpath;
+	(void)ptr;
+	ft_dup_redirs(ptr, msh);
+	ret = execve("/bin/ls", (char *const*)arg, msh->envp);
+	/* TODO: handle execve failed */
+	ft_lcom_clear(&msh->curr);
+	ft_s_destroy(msh);
+	exit(ret);
+}
+
+static void
+	ft_exec_path(const char fullpath[],
+				t_lcom *ptr,
+				t_msh *msh)
+{
+	pid_t	pid;
+	int32_t	status;
+
+	if ((pid = fork()) == 0)
+	{
+		ft_e_extern_child(fullpath, ptr, msh);
+	}
+	else if (pid < 0)
+	{
+		/* TODO: handle fork failed */
+	}
+	else
+	{
+		while (wait(&status) != pid)
+			;
+		msh->ret = WEXITSTATUS(status);
+	}
+}
 
 void
 	ft_e_extern(t_lcom *ptr,
@@ -32,4 +115,7 @@ void
 		/* TODO: exec $PATH stuff */
 		ft_delwords(envpath);
 	}
+	/* TODO: deal if not found etc */
+	ft_exec_path(fullpath, ptr, msh);
+	ft_memdel((void*)&fullpath);
 }