Add initial version of getty

This commit is contained in:
sin 2014-02-10 12:12:50 +00:00
parent bb87246743
commit adc7ff7d04
3 changed files with 81 additions and 1 deletions

View File

@ -26,6 +26,7 @@ SRC = \
eject.c \ eject.c \
fallocate.c \ fallocate.c \
free.c \ free.c \
getty.c \
halt.c \ halt.c \
insmod.c \ insmod.c \
lsmod.c \ lsmod.c \

1
TODO
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@ -13,7 +13,6 @@ Tools
* mkswap [-L] * mkswap [-L]
* passwd * passwd
* login * login
* getty
Other Other
===== =====

80
getty.c Normal file
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@ -0,0 +1,80 @@
/* See LICENSE file for copyright and license details. */
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "util.h"
static void
usage(void)
{
eprintf("usage: %s [tty] [term]\n", argv0);
}
static char *tty = "/dev/tty1";
static char *defaultterm = "TERM=linux";
int
main(int argc, char *argv[])
{
int fd;
struct sigaction sa;
char term[128];
ARGBEGIN {
default:
usage();
} ARGEND;
if (argc > 2)
usage();
strlcpy(term, defaultterm, sizeof(term));
if (argc > 0) {
tty = argv[0];
if (argc > 1) {
strlcpy(term, "TERM=", sizeof(term));
strlcat(term, argv[1], sizeof(term));
}
}
sa.sa_handler = SIG_IGN;
sa.sa_flags = 0;
sigemptyset(&sa.sa_mask);
sigaction(SIGHUP, &sa, NULL);
putenv(term);
setsid();
fd = open(tty, O_RDWR);
if (fd < 0)
eprintf("open %s:", tty);
if (isatty(fd) == 0)
eprintf("%s is not a tty\n", tty);
if (ioctl(fd, TIOCSCTTY, (void *)1) == 0) {
if (vhangup() < 0)
eprintf("vhangup:");
} else {
fprintf(stderr, "could not set controlling tty\n");
}
close(fd);
fd = open(tty, O_RDWR);
if (fd < 0)
eprintf("open %s:", tty);
dup2(fd, STDIN_FILENO);
dup2(fd, STDOUT_FILENO);
dup2(fd, STDERR_FILENO);
sa.sa_handler = SIG_DFL;
sa.sa_flags = 0;
sigemptyset(&sa.sa_mask);
sigaction(SIGHUP, &sa, NULL);
putchar('\n');
return execvp("/bin/login", (char *[]){ "login", NULL });
}