125 lines
2.5 KiB
C
125 lines
2.5 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* main.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: apommier <apommier@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2022/01/19 12:45:03 by apommier #+# #+# */
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/* Updated: 2022/01/20 20:26:59 by apommier ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "pipex.h"
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char **get_path(char **envp)
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{
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int i;
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int j;
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char **line;
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char *swap;
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i = 0;
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j = 0;
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line = 0;
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swap = 0;
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while (envp[i++] && envp[i])
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{
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if (!ft_strncmp(envp[i], "PATH", 4))
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{
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swap = ft_substr(envp[i], -1, 4);
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line = ft_split(swap, ':');
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free(swap);
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return (line);
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}
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free(line);
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}
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return (0);
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}
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char *get_command(char *exec, char **envp)
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{
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char **path;
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char *cmd;
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char *del;
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int i;
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i = 0;
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cmd = exec;
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path = get_path(envp);
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while (access(cmd, F_OK) && path[i++])
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{
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del = cmd;
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cmd = ft_strjoin("/", cmd);
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free(del);
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del = cmd;
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cmd = ft_strjoin(path[i], cmd);
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free(del);
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}
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return (cmd);
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}
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void pipex(char *cmd1, char *cmd2, int fd1, int fd2, char **envp)
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{
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int *pipe;
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pid_t parent;
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pipe = ft_calloc(sizeof(int), 2);
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if (pipe(pipe) == -1)
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return ;
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parent = fork();
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if (parent < 0)
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{
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free(pipe);
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return ;
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}
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if (!parent)
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child(cmd1, fd1, path);
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else
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parent(cmd2, fd2, path);
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else
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free(pipe);
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}
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void child(int fd1, char **envp, char **argv)
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{
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int i;
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char *cmd1;
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cmd1 = 0;
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i = 0;
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if (!dup2(fd1, STDIN_FILENO))
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return ;
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if (!dup2(pipe[1], STDIN_FILENO))
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return ;
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close(end[0]);
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close(fd1);
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cmd1 = get_command(argc[0], envp);
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if (cmd1)
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execve(cmd1, argv, envp)
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free(cmd1);
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}
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void parent(int fd2, char **envp, char **argv)
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{
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char *cmd2;
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return ;
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}
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int main(int argc, char **argv, char **envp)
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{
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int fd1;
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int fd2;
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char *path;
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if (check_error)
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return (0);
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fd1 = open(argv[1], O_RDONLY);
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fd2 = open(argv[4], O_RDWR | O_CREAT | O_TRUNC, 0644);
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if (!fd1 || !fd2)
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return (0);
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pipex(argv[1], argv[4], fd1, fd2);
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return (1);
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}
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