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#include <pty.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <poll.h>
#include <signal.h>
#include <string.h>
#include <errno.h>
static pid_t crawl;
static int tty;
static void sigalrm(int signum)
{
kill(crawl, SIGTERM);
}
static void slurp_output()
{
struct pollfd pfd;
char buf[1024];
signal(SIGALRM, sigalrm);
alarm(3600); // a hard limit of an hour (big tests on a Raspberry...)
pfd.fd = crawl;
pfd.events = POLLIN;
while (poll(&pfd, 1, 60000) > 0) // 60 seconds with no output -> die die die!
{
if (read(tty, buf, sizeof(buf)) <= 0)
#ifdef TRAVIS
{
puts(".");
#endif
break;
#ifdef TRAVIS
}
else
puts("x");
#endif
}
kill(crawl, SIGTERM); // shooting a zombie is ok, let's make sure it's dead
}
int main(int argc, char * const *argv)
{
struct winsize ws;
int slave;
int ret;
if (argc <= 1)
{
fprintf(stderr, "Usage: fake_pty program [args]\n");
return 1;
}
ws.ws_row = 24;
ws.ws_col = 80;
ws.ws_xpixel = ws.ws_ypixel = 0;
// We want to let stderr through, thus can't use forkpty().
if (openpty(&tty, &slave, 0, 0, &ws))
{
fprintf(stderr, "Can't create a pty: %s\n", strerror(errno));
return 1;
}
switch (crawl = fork())
{
case -1:
fprintf(stderr, "Can't fork: %s\n", strerror(errno));
return 1;
case 0:
close(tty);
dup2(slave, 0);
dup2(slave, 1); // but _not_ stderr!
close(slave);
execvp(argv[1], argv + 1);
fprintf(stderr, "Can't run '%s': %s\n", argv[1], strerror(errno));
return 1;
default:
close(slave);
slurp_output();
if (waitpid(crawl, &ret, 0) != crawl)
return 1; // can't happen
if (WIFEXITED(ret))
return WEXITSTATUS(ret);
if (WIFSIGNALED(ret))
return 128 + WTERMSIG(ret);
// Neither exited nor signaled? Did the process eat mushrooms meant
// fo the mother-in-law or what?
return 1;
}
}
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