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pipes

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This commit is contained in:
Loic Deridder
2025-01-29 15:08:31 +01:00
parent b56f1a7d3c
commit 1de678e89c
2 changed files with 60 additions and 57 deletions
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14
srcs/ast/ast.c
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@@ -6,7 +6,7 @@
/* By: lderidde <lderidde@student.s19.be> +#+ +:+ +#+ */ /* By: lderidde <lderidde@student.s19.be> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */ /* +#+#+#+#+#+ +#+ */
/* Created: 2025/01/24 08:22:16 by lderidde #+# #+# */ /* Created: 2025/01/24 08:22:16 by lderidde #+# #+# */
/* Updated: 2025/01/29 13:32:50 by lderidde ### ########.fr */ /* Updated: 2025/01/29 14:11:01 by lderidde ### ########.fr */
/* */ /* */
/* ************************************************************************** */ /* ************************************************************************** */
@@ -93,13 +93,17 @@ t_ast_n *return_hardcode_ast(char **envp)
head->right = created_ast_n(_PLINE, head, head); head->right = created_ast_n(_PLINE, head, head);
head->right->pline = malloc(sizeof(t_ast_n *) * 5); head->right->pline = malloc(sizeof(t_ast_n *) * 5);
head->right->pline[0] = created_ast_n(_CMD, head->right, head); head->right->pline[0] = created_ast_n(_CMD, head->right, head);
setup_cmd(head->right->pline[0], "ls", "ls"); setup_cmd(head->right->pline[0], "cat", "cat");
head->right->pline[1] = created_ast_n(_CMD, head->right, head); head->right->pline[1] = created_ast_n(_CMD, head->right, head);
setup_cmd(head->right->pline[1], "echo", "echo test test2"); setup_cmd(head->right->pline[1], "cat", "cat -e");
head->right->pline[2] = created_ast_n(_CMD, head->right, head); head->right->pline[2] = created_ast_n(_CMD, head->right, head);
setup_cmd(head->right->pline[2], "grep", "grep test"); setup_cmd(head->right->pline[2], "sdd", "");
head->right->pline[3] = created_ast_n(_CMD, head->right, head); head->right->pline[3] = created_ast_n(_CMD, head->right, head);
setup_cmd(head->right->pline[3], "cat", "cat -e"); setup_cmd(head->right->pline[3], "echo", "echo abc");
head->right->pline[0]->redir = _RED_L;
head->right->pline[0]->infile = "Makefile";
head->right->pline[1]->redir = _RED_R;
head->right->pline[1]->outfile = "test";
head->right->pline[4] = NULL; head->right->pline[4] = NULL;
return (head); return (head);
} }

101
srcs/execution/exec.c
View File

@@ -6,7 +6,7 @@
/* By: lderidde <lderidde@student.s19.be> +#+ +:+ +#+ */ /* By: lderidde <lderidde@student.s19.be> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */ /* +#+#+#+#+#+ +#+ */
/* Created: 2025/01/27 11:22:33 by lderidde #+# #+# */ /* Created: 2025/01/27 11:22:33 by lderidde #+# #+# */
/* Updated: 2025/01/29 13:33:57 by lderidde ### ########.fr */ /* Updated: 2025/01/29 15:07:44 by lderidde ### ########.fr */
/* */ /* */
/* ************************************************************************** */ /* ************************************************************************** */
@@ -144,7 +144,7 @@ int exec(t_ast_n *node)
{ {
char *path; char *path;
// handle_redir(node); handle_redir(node);
path = find_path(node->cmd, node->head->env); path = find_path(node->cmd, node->head->env);
if (!path) if (!path)
return_error(node->cmd, "command not found", 127); return_error(node->cmd, "command not found", 127);
@@ -171,7 +171,7 @@ int exec_scmd(t_ast_n *node)
pid = fork(); pid = fork();
if (pid == 0) if (pid == 0)
exec(node); exec(node);
else else if (pid > 0)
{ {
waitpid(pid, &status, 0); waitpid(pid, &status, 0);
if (WIFEXITED(status)) if (WIFEXITED(status))
@@ -179,45 +179,48 @@ int exec_scmd(t_ast_n *node)
else else
return (1); return (1);
} }
else
perror("fork");
return (1); return (1);
} }
} }
int *create_pipes(t_ast_n **pline) // int *create_pipes(t_ast_n **pline)
{ // {
int i; // int i;
int arg; // int arg;
int *pipes; // int *pipes;
//
// arg = count_cmds(pline);
// pipes = malloc(2 * (arg - 1) * sizeof(int));
// if (!pipes)
// return (NULL);
// i = -1;
// while (++i < arg - 1)
// {
// pipe(&pipes[2 * i]);
// }
// return (pipes);
// }
//
// void close_pipes(int *pipes, int count, bool flag)
// {
// int i;
//
// i = -1;
// while (++i < count)
// {
// close(pipes[2 * i]);
// close(pipes[(2 * i) + 1]);
// }
// if (flag)
// free(pipes);
// }
arg = count_cmds(pline); int err_fork_pline(int *pipes)
pipes = malloc(2 * (arg - 1) * sizeof(int));
if (!pipes)
return (NULL);
i = -1;
while (++i < arg - 1)
{ {
pipe(&pipes[2 * i]); close(pipes[0]);
} close(pipes[1]);
return (pipes);
}
void close_pipes(int *pipes, int count, bool flag)
{
int i;
i = -1;
while (++i < count)
{
close(pipes[2 * i]);
close(pipes[(2 * i) + 1]);
}
if (flag)
free(pipes);
}
int err_fork_pline(int *pipes, int count)
{
close_pipes(pipes, count, true);
perror("fork"); perror("fork");
return (1); return (1);
} }
@@ -226,13 +229,10 @@ void exec_pchild(int *pipes, int index, t_ast_n *pcmd, int cmds)
{ {
int ret; int ret;
if (index > 0)
dup2(pipes[2 * (index - 1)], STDIN_FILENO);
if (index < cmds - 1) if (index < cmds - 1)
dup2(pipes[(2 * index) + 1], STDOUT_FILENO); dup2(pipes[1], STDOUT_FILENO);
ft_fprintf(2, "cmd %d: STDIN = %d | STDOUT = %d\n", index, pipes[2 * (index - 1)], pipes[(2* index) + 1]); close(pipes[0]);
fflush(stderr); close(pipes[1]);
// close_pipes(pipes, cmds, false);
if (is_builtin(pcmd->cmd)) if (is_builtin(pcmd->cmd))
{ {
ret = exec_builtin(pcmd); ret = exec_builtin(pcmd);
@@ -257,32 +257,31 @@ int end_pline(pid_t last_pid, t_ast_n **pline)
return (1); return (1);
} }
int exec_pipe(t_ast_n **pline) int exec_pline(t_ast_n **pline)
{ {
int i; int i;
pid_t pid; pid_t pid;
pid_t last_pid; pid_t last_pid;
int *pipes; int pipes[2];
pipes = create_pipes(pline);
if (!pipes)
return (1);
i = -1; i = -1;
while (pline[++i]) while (pline[++i])
{ {
pipe(pipes);
pid = fork(); pid = fork();
if (pid == 0) if (pid == 0)
exec_pchild(pipes, i, pline[i], count_cmds(pline)); exec_pchild(pipes, i, pline[i], count_cmds(pline));
else if (pid > 0) else if (pid > 0)
{ {
wait(NULL); dup2(pipes[0], STDIN_FILENO);
close(pipes[0]);
close(pipes[1]);
if(i == count_cmds(pline) - 1) if(i == count_cmds(pline) - 1)
last_pid = pid; last_pid = pid;
} }
else if (pid < 0) else if (pid < 0)
return (err_fork_pline(pipes,count_cmds(pline))); return (err_fork_pline(pipes));
} }
// close_pipes(pipes, count_cmds(pline), true);
return (end_pline(last_pid, pline)); return (end_pline(last_pid, pline));
} }
@@ -307,6 +306,6 @@ int execute_command(t_ast_n *node)
return (status); return (status);
} }
else if (node->state == _PLINE) else if (node->state == _PLINE)
return (exec_pipe(node->pline)); return (exec_pline(node->pline));
return (0); return (0);
} }