111 lines
2.7 KiB
C
111 lines
2.7 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* exit.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: tordner <tordner@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2025/05/19 10:00:00 by lfirmin #+# #+# */
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/* Updated: 2025/06/01 21:30:31 by tordner ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "../../includes/minishell.h"
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#include <limits.h>
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#include <errno.h>
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static long long parse_digits(char *str, int *i, int sign, int *overflow)
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{
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long long result;
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result = 0;
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while (str[*i] >= '0' && str[*i] <= '9')
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{
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if (sign == 1 && check_positive_overflow(result, str[*i]))
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{
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*overflow = 1;
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return (LLONG_MAX);
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}
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if (sign == -1 && check_negative_overflow(result, str[*i]))
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{
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*overflow = 1;
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return (LLONG_MIN);
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}
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result = result * 10 + (str[*i] - '0');
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(*i)++;
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}
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return (result);
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}
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static long long safe_atoll(char *str, int *overflow)
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{
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long long result;
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int sign;
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int i;
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result = 0;
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sign = 1;
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i = 0;
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*overflow = 0;
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if (str[i] == '-' || str[i] == '+')
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{
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if (str[i] == '-')
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sign = -1;
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i++;
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}
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result = parse_digits(str, &i, sign, overflow);
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return (result * sign);
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}
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static void print_numeric_error(char *arg, t_shell *shell)
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{
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ft_putstr_fd("minishell: exit: ", 2);
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ft_putstr_fd(arg, 2);
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ft_putstr_fd(": numeric argument required\n", 2);
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shell->exit_status = 2;
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shell->running = 0;
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}
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static int handle_exit_argument(t_cmd *cmd, t_shell *shell, int *exit_code)
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{
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long long num;
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int overflow;
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if (!is_valid_number(cmd->args[1]))
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{
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print_numeric_error(cmd->args[1], shell);
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return (2);
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}
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num = safe_atoll(cmd->args[1], &overflow);
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if (overflow)
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{
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print_numeric_error(cmd->args[1], shell);
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return (2);
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}
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*exit_code = (unsigned char)(num % 256);
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if (cmd->args[2])
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{
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ft_putstr_fd("minishell: exit: too many arguments\n", 2);
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return (1);
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}
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return (0);
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}
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int ft_exit(t_cmd *cmd, t_shell *shell)
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{
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int exit_code;
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int result;
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printf("exit\n");
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exit_code = shell->exit_status;
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if (cmd->args[1])
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{
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result = handle_exit_argument(cmd, shell, &exit_code);
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if (result != 0)
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return (result);
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}
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shell->exit_status = exit_code;
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shell->running = 0;
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return (exit_code);
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}
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