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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ SGI"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* Holodeck display process communication |
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*/ |
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#include <sys/uio.h> |
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#ifndef HDSUF |
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#define HDSUF ".hdi" |
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#define HDSUF ".hdi" |
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#endif |
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#ifndef SLAVENAME |
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#define SLAVENAME "slave" |
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#endif |
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#ifndef FNONBLK |
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#define FNONBLK O_NONBLOCK |
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disp_open(dname) /* open the named display driver */ |
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char *dname; |
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{ |
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char buf[128], fd0[8], fd1[8], *cmd[5], *sfn; |
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char buf[sizeof(HDGRID)+512], fd0[8], fd1[8], *cmd[5], *sfn; |
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int i, n, len; |
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/* get full display program name */ |
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if (!strcmp(dname, SLAVENAME)) { |
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dpd[0] = 0; /* read from stdin */ |
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dpout = stdout; /* write to stdout */ |
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dpd[2] = -1; /* we're the slave process */ |
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} else { |
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/* get full display program name */ |
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#ifdef DEVPATH |
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sprintf(buf, "%s/%s%s", DEVPATH, dname, HDSUF); |
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sprintf(buf, "%s/%s%s", DEVPATH, dname, HDSUF); |
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#else |
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sprintf(buf, "dev/%s%s", dname, HDSUF); |
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sprintf(buf, "dev/%s%s", dname, HDSUF); |
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#endif |
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/* dup stdin and stdout */ |
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if (readinp) |
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sprintf(fd0, "%d", dup(0)); |
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else |
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strcpy(fd0, "-1"); |
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sprintf(fd1, "%d", dup(1)); |
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/* start the display process */ |
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cmd[0] = buf; |
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cmd[1] = froot; cmd[2] = fd1; cmd[3] = fd0; |
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cmd[4] = NULL; |
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i = open_process(dpd, cmd); |
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if (i <= 0) |
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error(USER, "cannot start display process"); |
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if ((dpout = fdopen(dpd[1], "w")) == NULL) |
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error(SYSTEM, "cannot associate FILE with display pipe"); |
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/* dup stdin and stdout */ |
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if (readinp) |
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sprintf(fd0, "%d", dup(0)); |
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else |
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strcpy(fd0, "-1"); |
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sprintf(fd1, "%d", dup(1)); |
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/* start the display process */ |
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cmd[0] = buf; |
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cmd[1] = froot; cmd[2] = fd1; cmd[3] = fd0; |
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cmd[4] = NULL; |
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i = open_process(dpd, cmd); |
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if (i <= 0) |
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error(USER, "cannot start display process"); |
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if ((dpout = fdopen(dpd[1], "w")) == NULL) |
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error(SYSTEM, "problem opening display pipe"); |
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/* close dup'ed stdin and stdout */ |
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if (readinp) |
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close(atoi(fd0)); |
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close(atoi(fd1)); |
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} |
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dpd[1] = -1; /* causes ignored error in close_process() */ |
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inp_flags = 0; |
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/* close dup'ed stdin and stdout */ |
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if (readinp) |
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close(atoi(fd0)); |
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close(atoi(fd1)); |
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/* check if outside */ |
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if (vdef(OBSTRUCTIONS) && vbool(OBSTRUCTIONS)) |
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disp_result(DS_OUTSECT, 0, NULL); |
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case DR_CLOBBER: /* clobber holodeck */ |
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if (msg.nbytes) |
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error(INTERNAL, "bad DR_CLOBBER from display process"); |
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if (!force || !ncprocs) |
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if (force <= 0 | ncprocs <= 0) |
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error(WARNING, "request to clobber holodeck denied"); |
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else { |
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error(WARNING, "clobbering holodeck contents"); |
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disp_result(DS_SHUTDOWN, 0, NULL); |
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fclose(dpout); |
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dpout = NULL; |
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return(close_process(dpd)); |
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return(dpd[2]<0 ? 0 : close_process(dpd)); |
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} |
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