home *** CD-ROM | disk | FTP | other *** search
- /***************************************************************************
- * This program is Copyright (C) 1986, 1987, 1988 by Jonathan Payne. JOVE *
- * is provided to you without charge, and with no warranty. You may give *
- * away copies of JOVE, including sources, provided that this notice is *
- * included in all the files. *
- ***************************************************************************/
-
- /* NOTE WELL:
- * This file is "included" into iproc.c -- it is not compiled separately!
- */
-
- #include <signal.h>
- #include <sgtty.h>
- #include "wait.h"
-
- #define DEAD 1 /* Dead but haven't informed user yet */
- #define STOPPED 2 /* Job stopped */
- #define RUNNING 3 /* Just running */
- #define NEW 4 /* This process is brand new */
-
- /* If process is dead, flags says how. */
- #define EXITED 1
- #define KILLED 2
-
- #define isdead(p) ((p) == NULL || proc_state((p)) == DEAD || (p)->p_toproc == -1)
- #define makedead(p) { proc_state((p)) = DEAD; }
-
- #define proc_buf(p) ((p)->p_buffer->b_name)
- #define proc_cmd(p) ((p)->p_name)
- #define proc_state(p) ((p)->p_state)
-
- private Process *procs = 0;
-
- File *ProcInput;
- int ProcOutput,
- kbd_pid = 0,
- NumProcs = 0;
-
- private Process *
- proc_pid(pid)
- int pid;
- {
- register Process *p;
-
- for (p = procs; p != 0; p = p->p_next)
- if (p->p_portpid == pid)
- break;
-
- return p;
- }
-
- void
- read_proc(pid, nbytes)
- int pid;
- register int nbytes;
- {
- register Process *p;
- int n;
- char ibuf[512];
-
- if ((p = proc_pid(pid)) == 0) {
- writef("\riproc: unknown pid (%d)", pid);
- return;
- }
-
- if (proc_state(p) == NEW) {
- int rpid;
- /* pid of real child, not of portsrv */
-
- (void) f_readn(ProcInput, (char *) &rpid, sizeof (int));
- p->p_pid = rpid;
- p->p_state = RUNNING;
- return;
- }
-
- if (nbytes == EOF) { /* okay to clean up this process */
- int status, pid;
-
- f_readn(ProcInput, &status, sizeof (int));
- do {
- pid = wait((int *) 0);
- if (pid < 0)
- break;
- kill_off(pid, status);
- } while (pid != p->p_portpid);
- proc_close(p);
- makedead(p);
- return;
- }
-
- while (nbytes > 0) {
- n = min((sizeof ibuf) - 1, nbytes);
- f_readn(ProcInput, ibuf, n);
- ibuf[n] = 0; /* Null terminate for convenience */
- nbytes -= n;
- proc_rec(p, ibuf);
- }
- }
-
- void
- ProcKill()
- {
- proc_kill(curbuf->b_process, SIGKILL);
- }
-
- void
- ProcInt()
- {
- proc_kill(curbuf->b_process, SIGINT);
- }
-
- void
- ProcQuit()
- {
- proc_kill(curbuf->b_process, SIGQUIT);
- }
-
- private void
- proc_close(p)
- Process *p;
- {
- if (p->p_toproc >= 0) {
- (void) close(p->p_toproc);
- p->p_toproc = -1; /* writes will fail */
- NumProcs -= 1;
- }
- }
-
- void
- proc_write(p, buf, nbytes)
- Process *p;
- char *buf;
- size_t nbytes;
- {
- (void) write(p->p_toproc, buf, nbytes);
- }
-
-
- #ifdef STDARGS
- private void
- proc_strt(char *bufname, int clobber, ...)
- #else
- private /*VARARGS3*/ void
- proc_strt(bufname, clobber, va_alist)
- char *bufname;
- int clobber;
- va_dcl
- #endif
- {
- Window *owind = curwind;
- int toproc[2],
- pid;
- Process *newp;
- Buffer *newbuf;
- char *argv[32],
- *cp,
- foo[10],
- cmdbuf[128];
- int i;
- va_list ap;
-
- isprocbuf(bufname); /* make sure BUFNAME is either nonexistant
- or is of type B_PROCESS */
- dopipe(toproc);
-
- switch (pid = fork()) {
- case -1:
- pclose(toproc);
- complain("[Fork failed.]");
-
- case 0:
- argv[0] = "portsrv";
- va_init(ap, clobber);
- make_argv(&argv[1], ap);
- va_end(ap);
- (void) dup2(toproc[0], 0);
- (void) dup2(ProcOutput, 1);
- (void) dup2(ProcOutput, 2);
- pclose(toproc);
- execv(Portsrv, argv);
- writef("execl failed\n");
- _exit(1);
- }
-
- newp = (Process *) malloc(sizeof *newp);
- newp->p_next = procs;
- newp->p_state = NEW;
-
- cmdbuf[0] = '\0';
- va_init(ap, clobber);
- while (cp = va_arg(ap, char *))
- swritef(&cmdbuf[strlen(cmdbuf)], "%s ", cp);
- va_end(ap);
- va_init(ap, clobber);
- newp->p_name = copystr(cmdbuf);
- procs = newp;
- newp->p_portpid = pid;
- newp->p_pid = -1;
-
- newbuf = do_select((Window *) 0, bufname);
- newbuf->b_type = B_PROCESS;
- newp->p_buffer = newbuf;
- newbuf->b_process = newp; /* sorta circular, eh? */
- pop_wind(bufname, clobber, B_PROCESS);
- ToLast();
- if (!bolp())
- LineInsert(1);
- /* Pop_wind() after everything is set up; important!
- Bindings won't work right unless newbuf->b_process is already
- set up BEFORE NEWBUF is first SetBuf()'d. */
- newp->p_mark = MakeMark(curline, curchar, M_FLOATER);
- newp->p_dbx_mode = NO;
-
- newp->p_toproc = toproc[1];
- newp->p_reason = 0;
- NumProcs += 1;
- if (NumProcs == 1)
- (void) kbd_strt();
- (void) close(toproc[0]);
- SetWind(owind);
- }
-
- void
- pinit()
- {
- int p[2];
-
- (void) pipe(p);
- ProcInput = fd_open("process-input", F_READ|F_LOCKED, p[0],
- (char *) 0, 512);
- ProcOutput = p[1];
- if ((kbd_pid = fork()) == -1) {
- printf("Cannot fork kbd process!\n");
- finish(1);
- }
- if (kbd_pid == 0) {
- signal(SIGINT, SIG_IGN);
- signal(SIGALRM, SIG_IGN);
- close(1);
- dup(ProcOutput);
- execl(Kbd_Proc, "kbd", 0);
- write(2, "kdb exec failed\n", 16);
- exit(-1);
- }
- }
-
- private int kbd_state = OFF;
-
- /* kbd_strt() and kbd_stop() return true if they changed the state
- of the keyboard process. E.g., kbd_strt() returns TRUE if the
- kbd process was previously stopped. This is so kbd starting and
- stopping in pairs works - see finish() in jove.c. */
-
- kbd_strt()
- {
- if (kbd_state == OFF) {
- kbd_state = ON;
- kill(kbd_pid, SIGQUIT);
- return TRUE;
- }
- return FALSE;
- }
-
- kbd_stop()
- {
- if (kbd_state == ON) {
- kbd_state = OFF;
- kill(kbd_pid, SIGQUIT);
- return TRUE;
- }
- return FALSE;
- }
-
- kbd_kill()
- {
- if (kbd_pid != 0) {
- kill(kbd_pid, SIGKILL);
- kbd_pid = 0;
- }
- }