redirect_in.c File Reference

#include "tokens.h"
#include "shell.h"
#include "redirection.h"
#include "execute.h"
#include <string.h>
#include <sys/wait.h>

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Functions
int	redirect_in (t_ast *node, t_ms_data *data)
static int	setup_redirection (t_ast *node, int *original_stdin)

Function Documentation

redirect_in()

int redirect_in	(	t_ast *	node,
		t_ms_data *	data
	)

Definition at line 45 of file redirect_in.c.

{
    int status;
    int original_stdin;
 
    if (setup_redirection(node, &original_stdin) == -1)
        return (EXIT_FAILURE);
    if (!node->left->args[0])
        status = EXIT_SUCCESS;
    else
        status = execute_ast(node->left, data);
    if (dup2(original_stdin, STDIN_FILENO) == -1)
        status = EXIT_FAILURE;
    close(original_stdin);
    return (status);
}

References s_ast::args, execute_ast(), EXIT_FAILURE, EXIT_SUCCESS, s_ast::left, and setup_redirection().

Referenced by execute_ast().

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setup_redirection()

static int setup_redirection ( t_ast *  node, int *  original_stdin  )

static

Definition at line 22 of file redirect_in.c.

{
    int fd;
 
    *original_stdin = dup(STDIN_FILENO);
    if (*original_stdin == -1)
        return (-1);
    fd = open_file(node->right, "<");
    if (fd == -1)
    {
        close(*original_stdin);
        return (-1);
    }
    if (dup2(fd, STDIN_FILENO) == -1)
    {
        close(fd);
        close(*original_stdin);
        return (-1);
    }
    close(fd);
    return (EXIT_SUCCESS);
}

References EXIT_SUCCESS, open_file(), and s_ast::right.

Referenced by redirect_in().

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