78 lines
1.5 KiB
C
Executable File
78 lines
1.5 KiB
C
Executable File
/*
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* Copyright (c) 1995, by Sun Microsystems, Inc.
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* All rights reserved.
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*/
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#pragma ident "@(#)writev.c 1.4 95/08/29 SMI"
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#include "../common/compat.h"
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#include <stdio.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <sys/uio.h>
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/*
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* If writing to a utmp-like file, map the utmp structure to
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* new format on the fly.
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*/
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extern int conv2utmpx(char *, char *, int);
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extern int conv2utmp(char *, char *, int);
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int
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writev(int fd, struct iovec *iov, int iovcnt)
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{
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return (bc_writev(fd, iov, iovcnt));
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}
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int
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bc_writev(int fd, struct iovec *iov, int iovcnt)
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{
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int fds, ret, off;
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int nsize, total = 0;
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char *nbuf;
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int i;
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if ((fds = fd_get(fd)) != -1) {
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for (i = 0; i < iovcnt; i++) {
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nsize = getmodsize(iov[i].iov_len, sizeof (struct utmp),
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sizeof (struct utmpx));
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if ((nbuf = (void *)malloc(nsize)) == NULL) {
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fprintf(stderr, "writev: malloc failed\n");
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exit(-1);
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}
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(void) memset(nbuf, 0, nsize);
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ret = conv2utmpx(nbuf, iov[i].iov_base, iov[i].iov_len);
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if ((ret = _write(fds, nbuf, ret)) == -1) {
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free(nbuf);
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return (-1);
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}
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(void) memset(nbuf, 0, nsize);
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ret = conv2utmp(nbuf, iov[i].iov_base, iov[i].iov_len);
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if ((ret = _write(fd, nbuf, ret)) == -1) {
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free(nbuf);
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return (-1);
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}
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total += ret;
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free(nbuf);
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ret = getmodsize(ret, sizeof (struct compat_utmp),
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sizeof (struct utmp));
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}
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total = getmodsize(total, sizeof (struct compat_utmp),
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sizeof (struct utmp));
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return (total);
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}
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return (_writev(fd, iov, iovcnt));
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}
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