134 lines
4 KiB
C
134 lines
4 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* process.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2024/01/03 16:22:41 by maiboyer #+# #+# */
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/* Updated: 2024/10/11 11:47:20 by maiboyer ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "me/fs/fs.h"
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#include "me/mem/mem.h"
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#include "me/os/os.h"
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#include "me/printf/printf.h"
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#include "me/str/str.h"
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#include "me/string/string.h"
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#include "me/types.h"
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#include "me/vec/vec_str.h"
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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bool _find_path(const t_str *s);
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bool _find_null(const t_str *s);
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t_error handle_redirections(t_spawn_info *info, t_process *process);
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t_error spawn_process_exec(t_spawn_info info, t_process *process)
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{
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if (info.forked_free)
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info.forked_free(info.forked_free_args);
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signal(SIGINT, SIG_DFL);
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signal(SIGQUIT, SIG_DFL);
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dup2(info.stdin.fd.fd->fd, 0);
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dup2(info.stdout.fd.fd->fd, 1);
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dup2(info.stderr.fd.fd->fd, 2);
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close_fd(process->stdin);
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close_fd(process->stdout);
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close_fd(process->stderr);
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close_fd(info.stdin.fd.fd);
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close_fd(info.stdout.fd.fd);
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close_fd(info.stderr.fd.fd);
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vec_str_push(&info.arguments, NULL);
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vec_str_push(&info.environement, NULL);
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execve(info.binary_path, info.arguments.buffer, info.environement.buffer);
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return (ERROR);
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}
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t_error in_path(t_spawn_info *info, t_process *process, t_const_str path_raw,
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t_string *s)
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{
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t_vec_str path;
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t_usize idx;
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(void)(process);
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if (str_split(path_raw + 5, ":", &path))
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return (string_free(*s), ERROR);
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idx = 0;
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while (idx < path.len)
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{
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string_clear(s);
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me_printf_str(s, "%s/%s", path.buffer[idx++], info->binary_path);
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printf("testing %s\n", s->buf);
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if (access(s->buf, X_OK) == 0)
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return (vec_str_free(path), NO_ERROR);
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}
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return (vec_str_free(path), ERROR);
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}
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t_error find_binary(t_spawn_info *info, t_process *process)
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{
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t_usize p_idx;
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t_string s;
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(void)(process);
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if (info->binary_path == NULL)
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return (ERROR);
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s = string_new(256);
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if (str_find_chr(info->binary_path, '/') != NULL)
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string_push(&s, info->binary_path);
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else
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{
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if (vec_str_find(&info->environement, _find_path, &p_idx))
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return (string_free(s), ERROR);
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if (in_path(info, process, info->environement.buffer[p_idx], &s))
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return (string_free(s), ERROR);
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}
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if (access(s.buf, X_OK) == 0)
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{
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mem_free(info->binary_path);
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info->binary_path = s.buf;
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return (NO_ERROR);
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}
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return (string_free(s), ERROR);
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}
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static void _process_cleanup(t_spawn_info info, t_process *process, \
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bool cleanup_process)
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{
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if (cleanup_process && process->stdin)
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close_fd(process->stdin);
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if (cleanup_process && process->stdout)
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close_fd(process->stdout);
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if (cleanup_process && process->stderr)
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close_fd(process->stderr);
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close_fd(info.stdin.fd.fd);
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close_fd(info.stdout.fd.fd);
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close_fd(info.stderr.fd.fd);
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vec_str_free(info.arguments);
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vec_str_free(info.environement);
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mem_free(info.binary_path);
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}
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t_error spawn_process(t_spawn_info info, t_process *process)
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{
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if (process == NULL)
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return (ERROR);
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if (handle_redirections(&info, process))
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return (_process_cleanup(info, process, true), ERROR);
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if (find_binary(&info, process))
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return (_process_cleanup(info, process, true), ERROR);
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process->pid = fork();
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if (process->pid == 0)
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(spawn_process_exec(info, process), exit(1));
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else
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{
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_process_cleanup(info, process, process->pid == -1);
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if (process->pid == -1)
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return (ERROR);
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}
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return (NO_ERROR);
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}
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