Category : OS/2 Files
Archive : EMXTST8F.ZIP
Filename : EXEC.C
Output of file : EXEC.C contained in archive : EMXTST8F.ZIP
#include
#include
#include
#include
#include
static int wp;
static int gpid;
static void do_wait (void)
{
int p, t;
if (wp)
p = waitpid (gpid, &t, 0);
else
p = wait (&t);
if (p == -1)
perror ("wait");
else
{
if ((t & 0xff) == 0)
fprintf (stderr, "Process %d terminated normally, rc=%d\n",
p, t >> 8);
else if ((t & 0xff) == 127)
fprintf (stderr, "Process %d stopped by signal %d\n",
p, t >> 8);
else
fprintf (stderr, "Process %d terminated by signal %d\n",
p, t & 0xff);
}
}
static void handler (int sig)
{
if (sig == SIGCLD)
{
fprintf (stderr, "SIGCLD: "); fflush (stderr);
do_wait ();
fflush (stderr);
signal (SIGCLD, SIG_ACK);
}
else
{
printf ("Signal %d received. Process stopped.\n", sig);
exit (1);
}
}
int main (int argc, char *argv[])
{
char buf[100], *p, *q, *r;
char *nenvp[1];
char *nargv[100];
char args[5000];
int i, j, mode, ask;
signal (SIGINT, handler);
signal (SIGCLD, handler);
if (argc >= 2)
{
i = spawnvp (mode, argv[1], (const char * const *)&argv[1]);
if (i < 0)
perror ("spawnve");
else
printf ("rc=%d\n", i);
return (0);
}
ask = 0; wp = 0;
for (;;)
{
printf ("pid=%d\n", (int)getpid ());
printf ("command: ");
fflush (stdout);
if (fgets (buf, sizeof (buf), stdin) == NULL)
{
perror ("fgets"); return (1);
}
p = strchr (buf, '\n');
if (p != NULL) *p = 0;
p = buf;
if (*p == '?')
{
puts ("? display help");
puts ("v=n set environment variable V to value N");
puts ("-s p send signal s to process p");
puts ("~c run C asynchronously");
puts ("*c run C as overlay");
puts ("#c run C for debugging");
puts ("&c run C detached");
puts ("%c start session running C");
puts (" Flags after %:");
puts (" + maximized");
puts (" - minimized");
puts (" % full-screen");
puts (" ! don't close window automatically");
puts (" $ background");
puts ("+a Toggle flag: ask for parameters");
puts ("+w Toggle flag: use waitpid()");
}
else if (strchr (p, '=') != NULL)
{
if (putenv (p) != 0)
perror ("putenv");
}
else if (sscanf (p, "-%d %d", &i, &j) == 2)
{
if (kill (j, i) < 0)
perror ("kill");
}
else if (p[0] == '+' && p[1] == 'a')
ask = !ask;
else if (p[0] == '+' && p[1] == 'w')
wp = !wp;
else
{
if (*p == '*')
{
mode = P_OVERLAY; ++p;
}
else if (*p == '#')
{
mode = P_DEBUG; ++p;
}
else if (*p == '~')
{
mode = P_NOWAIT; ++p;
}
else if (*p == '&')
{
mode = P_DETACH; ++p;
}
else if (*p == '%')
{
mode = P_SESSION;
++p;
if (*p == '-')
{
mode |= P_MINIMIZE; ++p;
}
else if (*p == '+')
{
mode |= P_MAXIMIZE; ++p;
}
else if (*p == '%')
{
mode |= P_FULLSCREEN; ++p;
}
else
mode |= P_WINDOWED;
if (*p == '!')
{
mode |= P_NOCLOSE; ++p;
}
if (*p == '$')
{
mode |= P_BACKGROUND; ++p;
}
}
else
mode = P_WAIT;
if (*p == 0)
{
printf ("done\n");
return (0);
}
i = 0;
q = p;
while ((nargv[i++] = strtok (q, " \t")) != NULL)
q = NULL;
if (ask)
{
printf ("Enter arguments, one per line (. to end):\n");
q = args; --i;
for (;;)
{
r = fgets (q, sizeof (args) - (q - args), stdin);
if (r == NULL)
return (0);
r = strchr (q, '\n');
if (r != NULL)
*r = 0;
else
r = strchr (q, 0);
if (strcmp (q, ".") == 0)
break;
nargv[i++] = q;
q = r + 1;
}
nargv[i] = NULL;
}
nenvp[0] = NULL;
#if 1
gpid = spawnvpe (mode, p, (const char * const *)nargv, NULL);
#else
gpid = spawnvpe (mode, p, (const char * const *)nargv,
(const char * const *)nenvp);
#endif
if (gpid < 0)
{
j = _syserrno ();
perror ("spawnve");
printf ("syserrno=%d\n", j);
}
else
printf ("rc=%d\n", gpid);
}
}
return (1);
}
/*
* Local variables:
* compile-command: "make exec.exe"
* end:
*/
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