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/*
* PCEXEC.C - Portable Process Control system exec utility
*
* Source Version: 2.0
* Software Release #92-0043
*
*/
#include "cpyright.h"
#include "ppc.h"
static PROCESS
*pp = NULL;
static int
SC_DECLARE(process_end, (char *name, int *pr, int quiet)),
SC_DECLARE(interrupt_mode, (char *name, int quiet)),
SC_DECLARE(poll_mode, (char *name, int quiet));
static void
SC_DECLARE(child_has_txt, (int fd)),
SC_DECLARE(tty_has_txt, (int fd)),
SC_DECLARE(error_handler, (int sig));
/*--------------------------------------------------------------------------*/
/*--------------------------------------------------------------------------*/
/* MAIN - test PPC */
int main(argc, argv, envp)
int argc;
char **argv, **envp;
{int i, interrupts, ret, quiet, access_file, log, parallel, to;
char mode[5];
/* process the command line arguments */
quiet = FALSE;
interrupts = TRUE;
parallel = FALSE;
access_file = FALSE;
log = FALSE;
to = 1000000;
strcpy(mode, "w");
if (argc < 2)
{printf("\nUsage: pcexec [-pst] [-c n] [-i] <prog> [<arg1> ...]\n");
printf(" pcexec -f <host>\n\n");
printf(" pcexec -r [<arg1> ...]\n\n");
printf(" The first form runs <prog> as a child process.\n");
printf(" The second form acts as a remote file access server.\n");
printf(" The third form acts as a parallel communications server.\n");
printf(" The forms for <prog> are:\n");
printf(" <name> - run <name> on local <host>\n");
printf(" <host>:<name> - run <name> on remote <host>\n");
printf(" <CPU>@<name> - run <name> on processor <CPU>\n");
printf(" <host>:<CPU>@<name> - run <name> on processor <CPU>\n");
printf(" The last two are not yet completed.\n");
printf("\n");
printf(" The full syntax for <host> is:\n");
printf(" <hostname> or\n");
printf(" <hostname>,<username> or\n");
printf(" <hostname>,<username>,<passwd>\n");
printf(" Note: whitespace is NOT allowed\n");
printf(" Options:\n");
printf(" c - timeout after n seconds\n");
printf(" i - poll explicitly instead of using system call\n");
printf(" l - when acting as a file server, log transactions to\n");
printf(" PC_fs.log in your home directory\n");
printf("\n");
printf(" p - use pipes for communications\n");
printf(" q - print only messages from the child\n");
printf(" s - use sockets for communications\n");
printf(" t - use pseudo terminals for communications\n");
printf(" These only apply to processes on the same CPU.\n");
printf("\n");
return(1);};
for (i = 1; argv[i] != NULL; i++)
{if (argv[i][0] == '-')
{switch (argv[i][1])
{case 'c' : to = SC_stoi(argv[++i]);
break;
case 'f' : access_file = TRUE;
break;
case 'i' : interrupts = FALSE;
break;
case 'l' : log = TRUE;
break;
case 'r' : parallel = TRUE;
i++;
break;
case 'p' : strcpy(mode, "wp");
break;
case 'q' : quiet = TRUE;
break;
case 's' : strcpy(mode, "ws");
break;
case 't' : strcpy(mode, "wt");
break;};}
else
break;};
/* trap the following signals to restore the terminal state */
#ifdef UNIX
SIGNAL(SIGSEGV, error_handler);
SIGNAL(SIGABRT, error_handler);
SIGNAL(SIGTERM, error_handler);
SIGNAL(SIGQUIT, error_handler);
SIGNAL(SIGILL, error_handler);
SIGNAL(SIGINT, error_handler);
#endif
if (access_file)
ret = PC_file_access(log);
else if (parallel)
ret = PC_process_access(argv, "rsb+");
else
{if ((strcmp(argv[i], "ftp") == 0) ||
(strcmp(argv[i], "telnet") == 0))
{if (strcmp(mode, "wt") != 0)
{if (!quiet)
PRINT(stdout,
"\nWarning: run with -t flag\n\n");};};
/* print this before we potentially go into RAW mode (PTY's do this) */
if (!quiet)
PRINT(stdout, "\nRunning process: %s\n\n", argv[i]);
/* set the alarm */
PC_alarm(to, error_handler);
pp = PC_open(argv+i, envp, mode);
if (pp == NULL)
{if (!quiet)
{PRINT(stdout, "%s\n", PC_err);
PRINT(stdout, "\nFailed to open: %s\n\n", argv[i]);};
error_handler(0);};
/* reset the alarm */
PC_alarm(0, NULL);
SC_setbuf(stdout, NULL);
/* set the alarm */
PC_alarm(to, error_handler);
if (interrupts)
ret = interrupt_mode(argv[i], quiet);
else
ret = poll_mode(argv[i], quiet);
/* reset the alarm */
PC_alarm(0, NULL);
if (!quiet)
PRINT(stdout, "Process test %s ended\n\n", argv[i]);};
return(ret);}
/*--------------------------------------------------------------------------*/
/*--------------------------------------------------------------------------*/
/* INTERRUPT_MODE - handle the child and tty I/O via interrupts */
static int interrupt_mode(name, quiet)
char *name;
int quiet;
{int pi, ret;
PC_io_interrupts_on = TRUE;
pi = PC_io_callback_file(stdin, tty_has_txt);
pi &= PC_io_callback_fd(pp->in, child_has_txt);
PC_io_interrupts_on = pi;
if (pi)
PC_catch_io_interrupts(PC_io_interrupts_on);
ret = -1;
while (TRUE)
{if (process_end(name, &ret, quiet))
break;
PC_poll_descriptors(-1);};
return(ret);}
/*--------------------------------------------------------------------------*/
/*--------------------------------------------------------------------------*/
/* CHILD_HAS_TXT - handle text from the child process */
static void child_has_txt(fd)
int fd;
{char s[MAXLINE];
while (PC_gets(s, MAXLINE, pp) != NULL)
PRINT(stdout, "%s", s);
return;}
/*--------------------------------------------------------------------------*/
/*--------------------------------------------------------------------------*/
/* TTY_HAS_TXT - handle text from the tty */
static void tty_has_txt(fd)
int fd;
{char s[MAXLINE];
if (fgets(s, LRG_TXT_BUFFER, stdin) != NULL)
PC_printf(pp, "%s", s);
return;}
/*--------------------------------------------------------------------------*/
/*--------------------------------------------------------------------------*/
/* POLL_MODE - poll the process and the tty */
static int poll_mode(name, quiet)
char *name;
int quiet;
{char s[LRG_TXT_BUFFER], *t;
int ret;
ret = -1;
while (TRUE)
{while (PC_gets(s, LRG_TXT_BUFFER, pp) != NULL)
PRINT(stdout, "%s", s);
if (process_end(name, &ret, quiet))
break;
PC_unblock_file(stdin);
PC_err[0] = '\0';
t = fgets(s, LRG_TXT_BUFFER, stdin);
PC_block_file(stdin);
PC_err[0] = '\0';
if (t != NULL)
PC_printf(pp, "%s", s);
if (PC_err[0] != '\0')
/* close now since the TTY may be in RAW mode and we want the output to
* look nice (PTY's do this)
*/
{PC_close(pp);
if (!quiet)
PRINT(stdout, "%s\n\n", PC_err);
break;};};
return(ret);}
/*--------------------------------------------------------------------------*/
/*--------------------------------------------------------------------------*/
/* PROCESS_END - return TRUE if the process has ended
* - do the PC_close now since the TTY may be in
* - RAW mode and we want the output to
* - look nice (PTY's do this)
*/
static int process_end(name, pr, quiet)
char *name;
int *pr, quiet;
{int status, reason;
if (PC_status(pp) != RUNNING)
{status = pp->status;
reason = pp->reason;
*pr = reason;
/* get anything remaining from the child */
child_has_txt(pp->in);
PC_close(pp);
if (!quiet)
PRINT(stdout, "\nProcess %s terminated (%d %d)\n",
name, status, reason);
return(TRUE);}
else
return(FALSE);}
/*--------------------------------------------------------------------------*/
/*--------------------------------------------------------------------------*/
/* ERROR_HANDLER - trap various signals and restore the terminal */
static void error_handler(sig)
int sig;
{if (PC_original_terminal_state != NULL)
{PC_set_term_state(PC_original_terminal_state, -1);
SFREE(PC_original_terminal_state);};
PC_block_file(stdin);
if (sig == SIGALRM)
{PRINT(stdout, "PCEXEC timed out\n");
exit(123);}
else
{PRINT(stdout, "PCEXEC exiting with signal %d\n", sig);
exit(1);};}
/*--------------------------------------------------------------------------*/
/*--------------------------------------------------------------------------*/
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