/*************************************************************************** * 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 <sys/time.h> #include <fcntl.h> #include <signal.h> #include "ttystate.h" #include "wait.h" #ifdef BSD386 #include <sys/ioctl.h> #endif #define DEAD 1 /* dead but haven't informed user yet */ #define STOPPED 2 /* job stopped */ #define RUNNING 3 /* just running */ #define NEW 4 /* brand new, never been ... received no input */ /* If process is dead, flags says how. */ #define EXITED 1 #define KILLED 2 #define isdead(p) ((p) == NULL || proc_state((p)) == DEAD || (p)->p_fd == -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 = NULL; fd_set global_fd; int NumProcs = 0; private Process * proc_pid(pid) int pid; { register Process *p; for (p = procs; p != NULL; p = p->p_next) if (p->p_pid == pid) break; return p; } void read_proc(fd) register int fd; { register Process *p; int n; char ibuf[1024]; for (p = procs; p != NULL; p = p->p_next) if (p->p_fd == fd) break; if (p == NULL) { writef("\riproc: unknown fd %d", fd); return; } n = read(fd, (UnivPtr) ibuf, sizeof(ibuf) - 1); if (n == -1 && (errno == EIO || errno == EWOULDBLOCK)) { if (proc_state(p) == NEW) return; proc_close(p); makedead(p); return; } else { if (proc_state(p) != RUNNING) { proc_state(p) = RUNNING; UpdModLine = YES; } } if (n <= 0) { if (n == 0) strcpy(ibuf, "[Process EOF]"); else swritef(ibuf, sizeof(ibuf), "\n[pty read error: %d]\n", errno); } else ibuf[n] = '\0'; proc_rec(p, ibuf); } void ProcKill() { register Buffer *b; char *bname; bname = ask_buf(curbuf); if ((b = buf_exists(bname)) == NULL) complain("[No such buffer]"); if (b->b_process == NULL) complain("%s not tied to a process.", bname); proc_kill(b->b_process, SIGKILL); } void ProcCont() { Process *p; if ((p = curbuf->b_process) == NULL) complain("[No process]"); if (p->p_state != DEAD) { proc_kill(p, SIGCONT); UpdModLine = YES; p->p_state = RUNNING; } } private void send_p(c) char c; { Process *p; char buf[2]; if ((p = curbuf->b_process) == NULL) complain("[No process]"); ToLast(); buf[0] = c; buf[1] = '\0'; proc_rec(p, buf); (void) write(p->p_fd, (UnivPtr) &c, (size_t) 1); } void ProcEof() { #ifdef SGTTY send_p(tc[OFF].t_eofc); #else send_p(sg[OFF].c_cc[VEOF]); #endif } void ProcInt() { #ifdef SGTTY send_p(tc[OFF].t_intrc); #else send_p(sg[OFF].c_cc[VINTR]); #endif } void ProcQuit() { #ifdef SGTTY send_p(tc[OFF].t_quitc); #else send_p(sg[OFF].c_cc[VQUIT]); #endif } void ProcStop() { #ifdef SGTTY send_p(ls[OFF].t_suspc); #else send_p(sg[OFF].c_cc[VSUSP]); #endif } void ProcDStop() { #ifdef SGTTY send_p(ls[OFF].t_dsuspc); #else send_p(sg[OFF].c_cc[VDSUSP]); #endif } private void proc_close(p) Process *p; { SigHold(SIGCHLD); /* be mutually exclusive */ if (p->p_fd >= 0) { (void) close(p->p_fd); FD_CLR(p->p_fd, &global_fd); NumProcs -= 1; p->p_fd = -1; } SigRelse(SIGCHLD); } private void proc_write(p, buf, nbytes) Process *p; char *buf; size_t nbytes; { fd_set mask; FD_ZERO(&mask); FD_SET(p->p_fd, &mask); while (write(p->p_fd, (UnivPtr) buf, nbytes) < 0) select(p->p_fd + 1, (fd_set *)0, &mask, (fd_set *)0, (struct timeval *)0); } #ifdef STDARGS private void proc_strt(char *bufname, int clobber, ...) #else private /*VARARGS2*/ void proc_strt(bufname, clobber, va_alist) char *bufname; int clobber; va_dcl #endif { va_list ap; char *argv[32], *cp; Window *owind = curwind; int pid; Process *newp; Buffer *newbuf; int i, ptyfd = -1, ttyfd, ldisc, lmode; register char *s, *t; char ttybuf[11], ptybuf[11]; char cmdbuf[LBSIZE]; #if defined(SGTTY) || defined(BRLUNIX) #ifdef BRLUNIX struct sg_brl sgt; #else struct sgttyb sgt; #endif #endif #ifdef TERMIO struct termio sgt; #endif #ifdef TERMIOS struct termios sgt; #endif #ifdef TIOCGWINSZ struct winsize win; #else # ifdef BTL_BLIT # include <sys/jioctl.h> struct jwinsize jwin; # endif #endif isprocbuf(bufname); /* make sure BUFNAME is either nonexistant or is of type B_PROCESS */ va_init(ap, clobber); make_argv(argv, ap); va_end(ap); if (access(argv[0], X_OK) != 0) { complain("[Couldn't access %s: %s]", argv[0], strerror(errno)); /* NOTREACHED */ } for (s = "pqrs"; ptyfd<0; s++) { if (*s == '\0') complain("[Out of ptys!]"); for (t = "0123456789abcdef"; *t; t++) { swritef(ptybuf, sizeof(ptybuf), "/dev/pty%c%c", *s, *t); if ((ptyfd = open(ptybuf, 2)) >= 0) { strcpy(ttybuf, ptybuf); ttybuf[5] = 't'; /* make sure both ends are available */ if ((i = open(ttybuf, 2)) < 0) { (void) close(ptyfd); ptyfd = -1; } else { (void) close(i); break; } } } } #ifdef TIOCGETD (void) ioctl(0, TIOCGETD, (UnivPtr) &ldisc); #endif #ifdef TIOCLGET (void) ioctl(0, TIOCLGET, (UnivPtr) &lmode); #endif #ifdef TIOCGWINSZ (void) ioctl(0, TIOCGWINSZ, (UnivPtr) &win); #else # ifdef BTL_BLIT (void) ioctl(0, JWINSIZE, (UnivPtr) &jwin); # endif /* BTL_BLIT */ #endif SigHold(SIGCHLD); #ifdef SIGWINCH SigHold(SIGWINCH); #endif switch (pid = fork()) { case -1: (void) close(ptyfd); s_mess("[Fork failed! %s]", strerror(errno)); goto fail; case 0: SigRelse(SIGCHLD); #ifdef SIGWINCH SigRelse(SIGWINCH); #endif for (i = 0; i < 32; i++) (void) close(i); #ifdef TIOCNOTTY if ((i = open("/dev/tty", 2)) >= 0) { (void) ioctl(i, TIOCNOTTY, (UnivPtr)NULL); (void) close(i); } #endif if ((ttyfd = open(ttybuf, 2)) < 0) exit(-1); (void) dup2(ttyfd, 1); (void) dup2(ttyfd, 2); #ifdef TIOCSETD (void) ioctl(0, TIOCSETD, (UnivPtr) &ldisc); #endif #ifdef TIOCLSET (void) ioctl(0, TIOCLSET, (UnivPtr) &lmode); #endif #ifdef TIOCSETC (void) ioctl(0, TIOCSETC, (UnivPtr) &tc[OFF]); #endif #ifdef TIOCSLTC (void) ioctl(0, TIOCSLTC, (UnivPtr) &ls[OFF]); #endif #ifdef TIOCGWINSZ # ifdef SIGWINCH (void) signal(SIGWINCH, SIG_IGN); # endif win.ws_row = curwind->w_height; (void) ioctl(0, TIOCSWINSZ, (UnivPtr) &win); #else # ifdef BTL_BLIT jwin.bytesy = curwind->w_height; (void) ioctl(0, JSWINSIZE, (UnivPtr) &jwin); # endif #endif sgt = sg[OFF]; #ifdef SGTTY sgt.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE | CBREAK | TANDEM); (void) stty(0, &sgt); #else sgt.c_lflag &= ~(ISIG|ICANON|ECHO); sgt.c_lflag |= ISIG|ICANON|IEXTEN; #ifndef OCRNL #define OCRNL 0 #endif sgt.c_oflag &= ~(OCRNL|ONLCR); # ifdef TERMIO (void) ioctl(0, TCSETAW, (UnivPtr) &sgt); # endif /* TERMIO */ # ifdef TERMIOS (void) tcsetattr(0, TCSADRAIN, &sgt); # endif /* TERMIOS */ #endif { int on = 1; (void) ioctl(0, TIOCREMOTE, (UnivPtr) &on); } #ifdef TIOCSCTTY (void) setsid(); (void) ioctl(0, TIOCSCTTY, 0); #else i = getpid(); (void) ioctl(0, TIOCSPGRP, (UnivPtr) &i); (void) setpgrp(0, i); #endif execv(argv[0], (const char **) &argv[1]); raw_scream("execve failed! %s\n"); _exit(errno + 1); } newp = (Process *) emalloc(sizeof *newp); #ifdef O_NDELAY fcntl (ptyfd, F_SETFL, O_NDELAY); #endif newp->p_fd = ptyfd; newp->p_pid = pid; newbuf = do_select((Window *)NULL, bufname); newbuf->b_type = B_PROCESS; newp->p_buffer = newbuf; newbuf->b_process = newp; /* sorta circular, eh? */ pop_wind(bufname, clobber, B_PROCESS); /* 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. */ ToLast(); if (!bolp()) LineInsert(1); cmdbuf[0] = '\0'; va_init(ap, clobber); while ((cp = va_arg(ap, char *)) != NULL) { size_t pl = strlen(cmdbuf); swritef(&cmdbuf[pl], sizeof(cmdbuf)-pl, "%s ", cp); } va_end(ap); newp->p_name = copystr(cmdbuf); newp->p_state = NEW; newp->p_reason = 0; newp->p_mark = MakeMark(curline, curchar, M_FLOATER); newp->p_dbx_mode = NO; newp->p_next = procs; procs = newp; NumProcs += 1; FD_SET(newp->p_fd, &global_fd); SetWind(owind); fail: SigRelse(SIGCHLD); #ifdef SIGWINCH SigRelse(SIGWINCH); #endif } void pinit() { FD_ZERO(&global_fd); FD_SET(0, &global_fd); (void) signal(SIGCHLD, proc_child); }