104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* shell_init.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: jhalford <jhalford@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2016/12/12 17:23:59 by jhalford #+# #+# */
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/* Updated: 2017/03/27 17:13:41 by gwojda ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "minishell.h"
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#define SHELL_USAGE1 "usage: 42sh [--no-jobcontrol]"
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#define SHELL_USAGE2 " or 42sh -c command"
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#define SHELL_USAGE3 " or 42sh script"
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static t_cliopts g_opts[] =
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{
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{'c', NULL, SH_OPTS_LC, SH_OPTS_JOBC | SH_INTERACTIVE, get_c_arg, 1},
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{-1, "no-jobcontrol", 0, SH_OPTS_JOBC, NULL, 0},
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{0, 0, 0, 0, 0, 0},
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};
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int get_c_arg(char *opt_arg, t_data *data)
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{
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if (!opt_arg)
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return (1);
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if (data)
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data->c_arg = opt_arg;
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return (0);
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}
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static int get_input_fd(t_data *data, char *file)
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{
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static int fds[2] = {-1, STDIN};
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struct stat buf;
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if (data->opts & SH_OPTS_LC && (file = data->c_arg))
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{
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pipe(fds);
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write(fds[PIPE_WRITE], file, ft_strlen(file));
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close(fds[PIPE_WRITE]);
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}
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else if ((file = *data->av_data))
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{
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if (stat(file, &buf) < 0)
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SH_ERR("%s: No such file or directory", file);
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else if (S_ISDIR(buf.st_mode))
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SH_ERR("%s: is a directory", file);
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else if ((fds[PIPE_READ] = open(file, O_RDONLY | O_CLOEXEC)) < 0)
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SH_ERR("%s: No such file or directory", file);
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}
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else
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return (STDIN);
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if (fds[PIPE_READ] < 0)
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return (-1);
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fds[PIPE_WRITE] = fcntl(fds[PIPE_READ], F_DUPFD_CLOEXEC, 10);
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close(fds[PIPE_READ]);
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return (fds[PIPE_WRITE]);
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}
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static int interactive_settings(void)
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{
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int *shell_pgid;
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t_data *data;
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data = data_singleton();
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shell_pgid = &data->jobc.shell_pgid;
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while (tcgetpgrp(STDIN) != (*shell_pgid = getpgrp()))
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kill(-*shell_pgid, SIGTTIN);
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*shell_pgid = getpid();
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shell_sig_reset();
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if (setpgid(*shell_pgid, *shell_pgid))
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{
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SH_ERR("setpgid(): %s", strerror(errno));
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return (-1);
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}
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tcsetpgrp(STDIN, *shell_pgid);
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tcgetattr(STDIN, &data->jobc.shell_tmodes);
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return (0);
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}
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int shell_init(int ac, char **av, char **env)
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{
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t_data *data;
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data = data_singleton();
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if (data_init(ac, av, env) < 0)
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return (-1);
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if (cliopts_get(av, g_opts, data))
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return (ft_perror(NULL)
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&& SH_ERR("%s", SHELL_USAGE1)
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&& SH_ERR("%s", SHELL_USAGE2)
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&& SH_ERR("%s", SHELL_USAGE3));
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if (!isatty(STDIN) || *data->av_data)
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data->opts &= ~(SH_INTERACTIVE | SH_OPTS_JOBC);
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if ((data->fd = get_input_fd(data, NULL)) < 0)
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return (-1);
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if (SH_IS_INTERACTIVE(data->opts) && interactive_settings() < 0)
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return (-1);
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shell_fds_init();
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return (0);
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}
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