Added builtin support in command eval, Refactoring eval/builtin function, Added doc

1 files changed, 48 insertions, 0 deletions

diff --git a/src/eval/pipe.c b/src/eval/pipe.c
new file mode 100644
index 0000000..897a5f2
--- /dev/null
+++ b/src/eval/pipe.c
@@ -0,0 +1,48 @@
+/**
+** \file   pipe.c
+** \brief  Pipes setup
+*/
+
+#include "eval.h"
+
+/**
+** \brief           Setup STDIN and STDOUT pipe in the parent process
+** \param cmd       Command to setup
+** \param pipe_in   STDIN pipe
+** \param pipe_out  STDOUT pipe
+** \return          -1 on error, 0 otherwise
+*/
+
+int	pipe_setup_parent(t_cmd *cmd, int pipe_in[2], int pipe_out[2])
+{
+	if (cmd->in != NULL)
+	{
+		if ((pipe_in[PIPE_WRITE] = open(cmd->in, O_RDONLY)) < 0)
+			return (-1);
+	}
+	if (cmd->out != NULL)
+	{
+		if ((pipe_out[PIPE_READ] = open(cmd->out,
+				(cmd->is_append ? O_WRONLY : O_APPEND) | O_CREAT)) < 0)
+			return (-1);
+	}
+	return (0);
+}
+
+/**
+** \brief           Setup STDIN and STDOUT pipe in the child process
+** \param pipe_in   STDIN pipe
+** \param pipe_out  STDOUT pipe
+** \return          -1 on error, 0 otherwise
+*/
+
+int	pipe_setup_child(int pipe_in[2], int pipe_out[2])
+{
+	if (pipe_in[PIPE_READ] != PIPE_CLOSED)
+		if (dup2(STDIN_FILENO, pipe_in[PIPE_READ]) == -1)
+			return (-1);
+	if (pipe_out[PIPE_WRITE] != PIPE_CLOSED)
+		if (dup2(STDOUT_FILENO, pipe_out[PIPE_WRITE]) == -1)
+			return (-1);
+	return (0);
+}