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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* University Copyright- Copyright (c) 1982, 1986, 1988
* The Regents of the University of California
* All Rights Reserved
*
* University Acknowledgment- Portions of this document are derived from
* software developed by the University of California, Berkeley, and its
* contributors.
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <c_synonyms.h>
#include "libcmdutils.h"
int
writefile(int fi, int fo, char *infile, char *outfile, char *asfile,
char *atfile, struct stat *s1p, struct stat *s2p)
{
int mapsize, munmapsize;
caddr_t cp;
off_t filesize = s1p->st_size;
off_t offset;
int nbytes;
int remains;
int n;
size_t src_size;
size_t targ_size;
char *srcbuf;
char *targbuf;
if (asfile != NULL) {
src_size = strlen(infile) + strlen(asfile) +
strlen(dgettext(TEXT_DOMAIN, " attribute ")) + 1;
} else {
src_size = strlen(infile) + 1;
}
srcbuf = malloc(src_size);
if (srcbuf == NULL) {
(void) fprintf(stderr,
dgettext(TEXT_DOMAIN, "could not allocate memory"
" for path buffer: "));
return (1);
}
if (asfile != NULL) {
(void) snprintf(srcbuf, src_size, "%s%s%s",
infile, dgettext(TEXT_DOMAIN, " attribute "), asfile);
} else {
(void) snprintf(srcbuf, src_size, "%s", infile);
}
if (atfile != NULL) {
targ_size = strlen(outfile) + strlen(atfile) +
strlen(dgettext(TEXT_DOMAIN, " attribute ")) + 1;
} else {
targ_size = strlen(outfile) + 1;
}
targbuf = malloc(targ_size);
if (targbuf == NULL) {
(void) fprintf(stderr,
dgettext(TEXT_DOMAIN, "could not allocate memory"
" for path buffer: "));
return (1);
}
if (atfile != NULL) {
(void) snprintf(targbuf, targ_size, "%s%s%s",
outfile, dgettext(TEXT_DOMAIN, " attribute "), atfile);
} else {
(void) snprintf(targbuf, targ_size, "%s", outfile);
}
if (ISREG(*s1p) && s1p->st_size > SMALLFILESIZE) {
/*
* Determine size of initial mapping. This will determine the
* size of the address space chunk we work with. This initial
* mapping size will be used to perform munmap() in the future.
*/
mapsize = MAXMAPSIZE;
if (s1p->st_size < mapsize) mapsize = s1p->st_size;
munmapsize = mapsize;
/*
* Mmap time!
*/
if ((cp = mmap((caddr_t)NULL, mapsize, PROT_READ,
MAP_SHARED, fi, (off_t)0)) == MAP_FAILED)
mapsize = 0; /* can't mmap today */
} else
mapsize = 0;
if (mapsize != 0) {
offset = 0;
for (;;) {
nbytes = write(fo, cp, mapsize);
/*
* if we write less than the mmaped size it's due to a
* media error on the input file or out of space on
* the output file. So, try again, and look for errno.
*/
if ((nbytes >= 0) && (nbytes != (int)mapsize)) {
remains = mapsize - nbytes;
while (remains > 0) {
nbytes = write(fo,
cp + mapsize - remains, remains);
if (nbytes < 0) {
if (errno == ENOSPC)
perror(targbuf);
else
perror(srcbuf);
(void) close(fi);
(void) close(fo);
(void) munmap(cp, munmapsize);
if (ISREG(*s2p))
(void) unlink(targbuf);
return (1);
}
remains -= nbytes;
if (remains == 0)
nbytes = mapsize;
}
}
/*
* although the write manual page doesn't specify this
* as a possible errno, it is set when the nfs read
* via the mmap'ed file is accessed, so report the
* problem as a source access problem, not a target file
* problem
*/
if (nbytes < 0) {
if (errno == EACCES)
perror(srcbuf);
else
perror(targbuf);
(void) close(fi);
(void) close(fo);
(void) munmap(cp, munmapsize);
if (ISREG(*s2p))
(void) unlink(targbuf);
if (srcbuf != NULL)
free(srcbuf);
if (targbuf != NULL)
free(targbuf);
return (1);
}
filesize -= nbytes;
if (filesize == 0)
break;
offset += nbytes;
if (filesize < mapsize)
mapsize = filesize;
if (mmap(cp, mapsize, PROT_READ, MAP_SHARED |
MAP_FIXED, fi, offset) == MAP_FAILED) {
perror(srcbuf);
(void) close(fi);
(void) close(fo);
(void) munmap(cp, munmapsize);
if (ISREG(*s2p))
(void) unlink(targbuf);
if (srcbuf != NULL)
free(srcbuf);
if (targbuf != NULL)
free(targbuf);
return (1);
}
}
(void) munmap(cp, munmapsize);
} else {
char buf[SMALLFILESIZE];
for (;;) {
n = read(fi, buf, sizeof (buf));
if (n == 0) {
return (0);
} else if (n < 0) {
(void) close(fi);
(void) close(fo);
if (ISREG(*s2p))
(void) unlink(targbuf);
if (srcbuf != NULL)
free(srcbuf);
if (targbuf != NULL)
free(targbuf);
return (1);
} else if (write(fo, buf, n) != n) {
(void) close(fi);
(void) close(fo);
if (ISREG(*s2p))
(void) unlink(targbuf);
if (srcbuf != NULL)
free(srcbuf);
if (targbuf != NULL)
free(targbuf);
return (1);
}
}
}
if (srcbuf != NULL)
free(srcbuf);
if (targbuf != NULL)
free(targbuf);
return (0);
}
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