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55 lines
1 KiB
C
55 lines
1 KiB
C
#include "syshdrs.h"
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#if !defined(NO_SIGNALS) && defined(SIGPIPE)
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extern volatile Sjmp_buf gPipeJmp;
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#endif
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int
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PWrite(int sfd, const char *const buf0, size_t size)
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{
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volatile int nleft;
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const char *volatile buf = buf0;
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int nwrote;
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#if !defined(NO_SIGNALS) && defined(SIGPIPE)
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vsio_sigproc_t sigpipe;
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if (SSetjmp(gPipeJmp) != 0) {
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(void) SSignal(SIGPIPE, (sio_sigproc_t) sigpipe);
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nwrote = size - nleft;
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if (nwrote > 0)
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return (nwrote);
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errno = EPIPE;
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return (kBrokenPipeErr);
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}
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sigpipe = (vsio_sigproc_t) SSignal(SIGPIPE, SIOHandler);
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#endif
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nleft = (int) size;
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forever {
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nwrote = write(sfd, buf, nleft);
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if (nwrote < 0) {
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if (errno != EINTR) {
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nwrote = size - nleft;
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if (nwrote == 0)
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nwrote = -1;
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goto done;
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} else {
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errno = 0;
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nwrote = 0;
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/* Try again. */
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}
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}
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nleft -= nwrote;
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if (nleft <= 0)
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break;
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buf += nwrote;
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}
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nwrote = size - nleft;
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done:
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#if !defined(NO_SIGNALS) && defined(SIGPIPE)
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(void) SSignal(SIGPIPE, (sio_sigproc_t) sigpipe);
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#endif
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return (nwrote);
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} /* PWrite */
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