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/**
** \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);
}
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