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/*
* UNG's Not GNU
*
* Copyright (c) 2011-2017, Jakob Kaivo <jkk@ung.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#define _XOPEN_SOURCE 700
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#ifdef SIGWINCH
#include <sys/ioctl.h>
#endif
#include "sh.h"
#include "shed.h"
sig_atomic_t got_sigwinch = 0;
static char sh_columns[8] = "80";
static char sh_lines[8] = "25";
#ifdef SIGWINCH
static void sh_sigwinch(int sig)
{
got_sigwinch = 1;
signal(sig, sh_sigwinch);
}
#endif
void sh_getwinsize(void)
{
#ifdef TIOCGWINSZ
struct winsize ws = { 0 };
ioctl(STDIN_FILENO, TIOCGWINSZ, &ws);
snprintf(sh_columns, sizeof(sh_columns), "%hhu", ws.ws_col);
snprintf(sh_lines, sizeof(sh_lines), "%hhu", ws.ws_row);
#else
FILE *cols = popen("tput cols", "r");
if (cols) {
fread(cols, 1, sizeof(sh_columns), sh_columns);
fclose(cols);
}
FILE *lines = popen("tput lines", "r");
if (lines) {
fread(lines, 1, sizeof(sh_lines), sh_lines);
fclose(lines);
}
#endif
setenv("COLUMNS", sh_columns, 1);
setenv("LINES", sh_lines, 1);
}
int sh_interactive(void)
{
struct shed ed = {
.prompt = getenv("PS1"),
.handle = shed_handle_non_vi,
};
sh_getwinsize();
#ifdef SIGWINCH
signal(SIGWINCH, sh_sigwinch);
#endif
while (shed(&ed) != NULL) {
if (ed.cur->nread == 1 && ed.cur->buf[0] == CTRL_D) {
printf("\n");
return 0;
}
if (strlen(ed.cur->buf) == 0) {
continue;
}
struct command *command = sh_parse(ed.cur->buf);
if (errno == SIGINT) {
if (got_sigwinch) {
sh_getwinsize();
}
}
if (command) {
sh_execute(command);
sh_freecmd(command);
}
}
return 0;
}
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