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#include <errno.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <unistd.h>
#if defined(__OpenBSD__) || defined(__APPLE__)
#include <util.h>
#elif defined(__FreeBSD__)
#include <libutil.h>
#else
#include <pty.h>
#endif
#include "utils.h"
pid_t pty_fork(int *pty, const char *file, char *const argv[], const char *term) {
pid_t pid = forkpty(pty, NULL, NULL, NULL);
if (pid < 0) {
return pid;
} else if (pid == 0) {
setenv("TERM", term, true);
int ret = execvp(file, argv);
if (ret < 0) {
perror("execvp failed\n");
_exit(-errno);
}
}
// set the file descriptor non blocking
int flags = fcntl(*pty, F_GETFL);
if (flags != -1) {
fcntl(*pty, F_SETFD, flags | O_NONBLOCK);
}
// set the file descriptor close-on-exec
fd_set_cloexec(*pty);
return pid;
}
int pty_resize(int pty, int cols, int rows) {
struct winsize size;
size.ws_col = (unsigned short)cols;
size.ws_row = (unsigned short)rows;
size.ws_xpixel = 0;
size.ws_ypixel = 0;
return ioctl(pty, TIOCSWINSZ, &size);
}
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