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fix(pipe_cmd): check for fork failures

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This commit is contained in:
Khaïs COLIN 2025-04-30 11:45:19 +02:00
parent a8c3473b1a
commit 4b08629bef
1 changed files with 59 additions and 28 deletions
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87
src/executing/connec_cmd/connec_pipe_cmd_execute.c
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@ -6,28 +6,17 @@
/* By: kcolin <kcolin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2025/04/11 12:01:29 by kcolin #+# #+# */
/* Updated: 2025/04/29 15:11:23 by kcolin ### ########.fr */
/* Updated: 2025/04/30 11:49:59 by kcolin ### ########.fr */
/* */
/* ************************************************************************** */
#include "../../ft_errno.h"
#include "connec_pipe_cmd_execute.h"
#include "../common/do_waitpid.h"
#include <unistd.h>
#include <stdio.h>
#include "../cmd/cmd_execute.h"
static void pipe_do_close(int pipefd[2])
{
close(pipefd[0]);
close(pipefd[1]);
}
static void dup_and_close(int fd, int fd2, int pipefd[2])
{
dup2(fd, fd2);
pipe_do_close(pipefd);
}
static int do_pipe(int pipefd[2], t_minishell *app)
{
if (pipe(pipefd) < 0)
@ -39,11 +28,52 @@ static int do_pipe(int pipefd[2], t_minishell *app)
return (0);
}
static void close_and_wait(t_minishell *app, int pid1, int pid2, int pipefd[2])
static void fork_failure(t_minishell *app, int pipefd[2])
{
pipe_do_close(pipefd);
do_waitpid(app, pid1);
do_waitpid(app, pid2);
perror("minishell: fork");
close(pipefd[0]);
close(pipefd[1]);
app->last_return_value = 255;
ft_errno(FT_EERRNO);
}
/*
** return the pid returned by fork. values greater than 0 indicate parentprocess
*/
static int exec_pid1(t_minishell *app, int pipefd[2], t_cmd *cmd)
{
int pid1;
pid1 = fork();
if (pid1 < 0)
return (fork_failure(app, pipefd), 1);
if (pid1 == 0)
{
dup2(pipefd[1], STDOUT_FILENO);
close(pipefd[0]);
close(pipefd[1]);
cmd_execute(cmd, app);
return (pid1);
}
return (pid1);
}
static int exec_pid2(t_minishell *app, int pipefd[2], t_cmd *cmd)
{
int pid1;
pid1 = fork();
if (pid1 < 0)
return (fork_failure(app, pipefd), 1);
if (pid1 == 0)
{
dup2(pipefd[0], STDIN_FILENO);
close(pipefd[0]);
close(pipefd[1]);
cmd_execute(cmd, app);
return (pid1);
}
return (pid1);
}
t_subprocess connec_pipe_cmd_execute(t_connec_cmd *cmd, t_minishell *app)
@ -54,20 +84,21 @@ t_subprocess connec_pipe_cmd_execute(t_connec_cmd *cmd, t_minishell *app)
if (do_pipe(pipefd, app) < 0)
return (PARENTPROCESS);
pid1 = fork();
ft_errno(FT_ESUCCESS);
pid1 = exec_pid1(app, pipefd, cmd->first);
if (pid1 > 0 && ft_errno_get() != FT_ESUCCESS)
return (PARENTPROCESS);
if (pid1 == 0)
{
dup_and_close(pipefd[1], STDOUT_FILENO, pipefd);
cmd_execute(cmd->first, app);
return (SUBPROCESS);
}
pid2 = fork();
ft_errno(FT_ESUCCESS);
pid2 = exec_pid2(app, pipefd, cmd->second);
if (pid2 > 0 && ft_errno_get() != FT_ESUCCESS)
return (PARENTPROCESS);
if (pid2 == 0)
{
dup_and_close(pipefd[0], STDIN_FILENO, pipefd);
cmd_execute(cmd->second, app);
return (SUBPROCESS);
}
close_and_wait(app, pid1, pid2, pipefd);
close(pipefd[0]);
close(pipefd[1]);
do_waitpid(app, pid1);
do_waitpid(app, pid2);
return (PARENTPROCESS);
}