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/* Copyright (c) 1991 Regents of the University of California */ |
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#ifndef lint |
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< |
static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* Routines to communicate with separate process via dual pipes |
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* |
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* External symbols declared in standard.h |
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*/ |
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#include "copyright.h" |
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|
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/* find pipe buffer limit */ |
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#include <sys/param.h> |
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#include "vfork.h" |
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|
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#ifndef BSD |
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#include <errno.h> |
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#endif |
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|
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|
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int |
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open_process(pd, av) /* open communication to separate process */ |
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int pd[3]; |
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int siz; |
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{ |
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register int cc = 0, nrem = siz; |
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|
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retry: |
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while (nrem > 0 && (cc = read(fd, bpos, nrem)) > 0) { |
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bpos += cc; |
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nrem -= cc; |
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} |
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if (cc < 0) |
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if (cc < 0) { |
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#ifndef BSD |
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if (errno == EINTR) /* we were interrupted! */ |
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goto retry; |
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#endif |
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return(cc); |
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} |
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return(siz-nrem); |
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} |
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|
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int siz; |
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{ |
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register int cc = 0, nrem = siz; |
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retry: |
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while (nrem > 0 && (cc = write(fd, bpos, nrem)) > 0) { |
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bpos += cc; |
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nrem -= cc; |
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} |
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< |
if (cc < 0) |
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> |
if (cc < 0) { |
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#ifndef BSD |
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if (errno == EINTR) /* we were interrupted! */ |
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goto retry; |
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#endif |
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return(cc); |
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} |
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return(siz-nrem); |
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} |
