nxu/term.c

63 lines
1.7 KiB
C

#include <pwd.h>
#ifdef __APPLE__
#include <util.h>
#include <sys/ioctl.h>
#else
#include <pty.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
// compile with gcc term.c -lutil
int main(int argc, char **argv) {
if (argc < 2) {
printf("usage: %s ROM [LOGIN]\n", argv[0]);
return 1;
}
char *rom = argv[1]; // find term.rom
int login = argc > 2; // any extra arg signals login shell
// detect the user's shell
char *shell = getenv("SHELL");
if (shell == NULL) {
struct passwd *passwd = getpwuid(getuid());
if (passwd != NULL) {
shell = passwd->pw_shell;
}
}
if (shell == NULL) {
shell = "/bin/sh";
}
// find the shell's name
char *slash = strrchr(shell, '/');
char *name = slash == NULL ? shell : slash + 1;
// allocate a pty, fork, inititialize file descriptor
int fdm = -1; // allocate file descriptor
pid_t pid = forkpty(&fdm, NULL, NULL, NULL);
if (pid < 0) { // failure
perror("fork failed");
return 1;
} else if (pid == 0) { // child
setenv("TERM", "ansi", 1);
// execute shell
if (login) {
execlp(name, shell, "-l", "-i", NULL);
} else {
execlp(name, shell, NULL);
}
perror("exec bash failed");
} else { // parent
struct winsize ws = {23, 80, 8, 12}; // rows, cols, xps, ypx
ioctl(fdm, TIOCSWINSZ, &ws); // set term window size
dup2(fdm, 0); // use fdm for stdin
dup2(fdm, 1); // use fdm for stdout
execlp("uxnemu", "uxnemu", rom, NULL); // exec uxnemu
perror("exec uxnemu failed");
}
}