pipe.h File Reference

#include "shell.h"
#include "tokens.h"

Include dependency graph for pipe.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Macros
#define	WAIT_NEXT_COMMAND   1

Functions
int	builtin_pipe (t_ast *node, t_ms_data *data)
	execute pipe when | is found in the command

Macro Definition Documentation

WAIT_NEXT_COMMAND

#define WAIT_NEXT_COMMAND   1

Definition at line 19 of file pipe.h.

Function Documentation

builtin_pipe()

int builtin_pipe	(	t_ast *	node,
		t_ms_data *	data
	)

execute pipe when | is found in the command

--

• Parameters

  node	current node in the AST

• Parameters

  data	minishell structure data

• Returns

  int return status:

• - 0: success
• - 1: error

Definition at line 35 of file pipe.c.

{
    int     fd[2];
    pid_t   pid_1;
    pid_t   pid_2;
    int     status;
 
    pid_2 = -1;
    if (pipe(fd) == -1)
        ft_perror("pipe");
    pid_1 = execute_child(node->left, data, fd, 0);
    if (node->right != NULL)
        pid_2 = execute_child(node->right, data, fd, 1);
    else
    {
        close(fd[1]);
        data->std_in = fd[0];
        return (WAIT_NEXT_COMMAND);
    }
    close_fds(fd[0], fd[1]);
    if (pid_1 > 0)
        waitpid(pid_1, &status, 0);
    if (node->right != NULL && pid_2 > 0)
        waitpid(pid_2, &status, 0);
    return (WEXITSTATUS(status));
}

References close_fds(), execute_child(), ft_perror(), s_ast::left, s_ast::right, s_ms_data::std_in, and WAIT_NEXT_COMMAND.

Referenced by builtin_pipe_test(), and execute_ast().

Here is the call graph for this function:

Here is the caller graph for this function: