30eeed2c01
Replaces commands/split. No Minix-specific changes needed. Change-Id: I3c6551cf52d4c43eea0e8005b9cae83e17271f2d
362 lines
8.4 KiB
C
362 lines
8.4 KiB
C
/* $NetBSD: split.c,v 1.26 2011/09/16 15:39:29 joerg Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1987, 1993, 1994
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
__COPYRIGHT("@(#) Copyright (c) 1987, 1993, 1994\
|
|
The Regents of the University of California. All rights reserved.");
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)split.c 8.3 (Berkeley) 4/25/94";
|
|
#endif
|
|
__RCSID("$NetBSD: split.c,v 1.26 2011/09/16 15:39:29 joerg Exp $");
|
|
#endif /* not lint */
|
|
|
|
#include <sys/param.h>
|
|
|
|
#include <ctype.h>
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#define DEFLINE 1000 /* Default num lines per file. */
|
|
|
|
static int file_open; /* If a file open. */
|
|
static int ifd = STDIN_FILENO, ofd = -1; /* Input/output file descriptors. */
|
|
static char *fname; /* File name prefix. */
|
|
static size_t sfxlen = 2; /* suffix length. */
|
|
|
|
static void newfile(void);
|
|
static void split1(off_t, int) __dead;
|
|
static void split2(off_t) __dead;
|
|
static void split3(off_t) __dead;
|
|
static void usage(void) __dead;
|
|
static size_t bigwrite(int, void const *, size_t);
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
int ch;
|
|
char *ep, *p;
|
|
char const *base;
|
|
off_t bytecnt = 0; /* Byte count to split on. */
|
|
off_t numlines = 0; /* Line count to split on. */
|
|
off_t chunks = 0; /* Number of chunks to split into. */
|
|
|
|
while ((ch = getopt(argc, argv, "0123456789b:l:a:n:")) != -1)
|
|
switch (ch) {
|
|
case '0': case '1': case '2': case '3': case '4':
|
|
case '5': case '6': case '7': case '8': case '9':
|
|
/*
|
|
* Undocumented kludge: split was originally designed
|
|
* to take a number after a dash.
|
|
*/
|
|
if (numlines == 0) {
|
|
p = argv[optind - 1];
|
|
if (p[0] == '-' && p[1] == ch && !p[2])
|
|
p++;
|
|
else
|
|
p = argv[optind] + 1;
|
|
numlines = strtoull(p, &ep, 10);
|
|
if (numlines == 0 || *ep != '\0')
|
|
errx(1, "%s: illegal line count.", p);
|
|
}
|
|
break;
|
|
case 'b': /* Byte count. */
|
|
if (!isdigit((unsigned char)optarg[0]) ||
|
|
(bytecnt = strtoull(optarg, &ep, 10)) == 0 ||
|
|
(*ep != '\0' && *ep != 'k' && *ep != 'm'))
|
|
errx(1, "%s: illegal byte count.", optarg);
|
|
if (*ep == 'k')
|
|
bytecnt *= 1024;
|
|
else if (*ep == 'm')
|
|
bytecnt *= 1024 * 1024;
|
|
break;
|
|
case 'l': /* Line count. */
|
|
if (numlines != 0)
|
|
usage();
|
|
if (!isdigit((unsigned char)optarg[0]) ||
|
|
(numlines = strtoull(optarg, &ep, 10)) == 0 ||
|
|
*ep != '\0')
|
|
errx(1, "%s: illegal line count.", optarg);
|
|
break;
|
|
case 'a': /* Suffix length. */
|
|
if (!isdigit((unsigned char)optarg[0]) ||
|
|
(sfxlen = (size_t)strtoul(optarg, &ep, 10)) == 0 ||
|
|
*ep != '\0')
|
|
errx(1, "%s: illegal suffix length.", optarg);
|
|
break;
|
|
case 'n': /* Chunks. */
|
|
if (!isdigit((unsigned char)optarg[0]) ||
|
|
(chunks = (size_t)strtoul(optarg, &ep, 10)) == 0 ||
|
|
*ep != '\0')
|
|
errx(1, "%s: illegal number of chunks.", optarg);
|
|
break;
|
|
default:
|
|
usage();
|
|
}
|
|
argv += optind;
|
|
argc -= optind;
|
|
|
|
if (*argv != NULL) {
|
|
if (strcmp(*argv, "-") != 0 &&
|
|
(ifd = open(*argv, O_RDONLY, 0)) < 0)
|
|
err(1, "%s", *argv);
|
|
++argv;
|
|
}
|
|
|
|
|
|
base = (*argv != NULL) ? *argv++ : "x";
|
|
if ((fname = malloc(strlen(base) + sfxlen + 1)) == NULL)
|
|
err(EXIT_FAILURE, NULL);
|
|
(void)strcpy(fname, base); /* File name prefix. */
|
|
|
|
if (*argv != NULL)
|
|
usage();
|
|
|
|
if (numlines == 0)
|
|
numlines = DEFLINE;
|
|
else if (bytecnt || chunks)
|
|
usage();
|
|
|
|
if (bytecnt && chunks)
|
|
usage();
|
|
|
|
if (bytecnt)
|
|
split1(bytecnt, 0);
|
|
else if (chunks)
|
|
split3(chunks);
|
|
else
|
|
split2(numlines);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* split1 --
|
|
* Split the input by bytes.
|
|
*/
|
|
static void
|
|
split1(off_t bytecnt, int maxcnt)
|
|
{
|
|
off_t bcnt;
|
|
ssize_t dist, len;
|
|
char *C;
|
|
char bfr[MAXBSIZE];
|
|
int nfiles;
|
|
|
|
nfiles = 0;
|
|
|
|
for (bcnt = 0;;)
|
|
switch (len = read(ifd, bfr, MAXBSIZE)) {
|
|
case 0:
|
|
exit(0);
|
|
/* NOTREACHED */
|
|
case -1:
|
|
err(1, "read");
|
|
/* NOTREACHED */
|
|
default:
|
|
if (!file_open) {
|
|
if (!maxcnt || (nfiles < maxcnt)) {
|
|
newfile();
|
|
nfiles++;
|
|
file_open = 1;
|
|
}
|
|
}
|
|
if (bcnt + len >= bytecnt) {
|
|
/* LINTED: bytecnt - bcnt <= len */
|
|
dist = bytecnt - bcnt;
|
|
if (bigwrite(ofd, bfr, dist) != (size_t)dist)
|
|
err(1, "write");
|
|
len -= dist;
|
|
for (C = bfr + dist; len >= bytecnt;
|
|
/* LINTED: bytecnt <= len */
|
|
len -= bytecnt, C += bytecnt) {
|
|
if (!maxcnt || (nfiles < maxcnt)) {
|
|
newfile();
|
|
nfiles++;
|
|
}
|
|
/* LINTED: as above */
|
|
if (bigwrite(ofd,
|
|
C, bytecnt) != (size_t)bytecnt)
|
|
err(1, "write");
|
|
}
|
|
if (len) {
|
|
if (!maxcnt || (nfiles < maxcnt)) {
|
|
newfile();
|
|
nfiles++;
|
|
}
|
|
/* LINTED: len >= 0 */
|
|
if (bigwrite(ofd, C, len) != (size_t)len)
|
|
err(1, "write");
|
|
} else
|
|
file_open = 0;
|
|
bcnt = len;
|
|
} else {
|
|
bcnt += len;
|
|
/* LINTED: len >= 0 */
|
|
if (bigwrite(ofd, bfr, len) != (size_t)len)
|
|
err(1, "write");
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* split2 --
|
|
* Split the input by lines.
|
|
*/
|
|
static void
|
|
split2(off_t numlines)
|
|
{
|
|
off_t lcnt;
|
|
size_t bcnt;
|
|
ssize_t len;
|
|
char *Ce, *Cs;
|
|
char bfr[MAXBSIZE];
|
|
|
|
for (lcnt = 0;;)
|
|
switch (len = read(ifd, bfr, MAXBSIZE)) {
|
|
case 0:
|
|
exit(0);
|
|
/* NOTREACHED */
|
|
case -1:
|
|
err(1, "read");
|
|
/* NOTREACHED */
|
|
default:
|
|
if (!file_open) {
|
|
newfile();
|
|
file_open = 1;
|
|
}
|
|
for (Cs = Ce = bfr; len--; Ce++)
|
|
if (*Ce == '\n' && ++lcnt == numlines) {
|
|
bcnt = Ce - Cs + 1;
|
|
if (bigwrite(ofd, Cs, bcnt) != (size_t)bcnt)
|
|
err(1, "write");
|
|
lcnt = 0;
|
|
Cs = Ce + 1;
|
|
if (len)
|
|
newfile();
|
|
else
|
|
file_open = 0;
|
|
}
|
|
if (Cs < Ce) {
|
|
bcnt = Ce - Cs;
|
|
if (bigwrite(ofd, Cs, bcnt) != (size_t)bcnt)
|
|
err(1, "write");
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* split3 --
|
|
* Split the input into specified number of chunks
|
|
*/
|
|
static void
|
|
split3(off_t chunks)
|
|
{
|
|
struct stat sb;
|
|
|
|
if (fstat(ifd, &sb) == -1) {
|
|
err(1, "stat");
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
if (chunks > sb.st_size) {
|
|
errx(1, "can't split into more than %d files",
|
|
(int)sb.st_size);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
split1(sb.st_size/chunks, chunks);
|
|
}
|
|
|
|
/*
|
|
* newfile --
|
|
* Open a new output file.
|
|
*/
|
|
static void
|
|
newfile(void)
|
|
{
|
|
static int fnum;
|
|
static char *fpnt;
|
|
int quot, i;
|
|
|
|
if (ofd == -1) {
|
|
fpnt = fname + strlen(fname);
|
|
fpnt[sfxlen] = '\0';
|
|
} else if (close(ofd) != 0)
|
|
err(1, "%s", fname);
|
|
|
|
quot = fnum;
|
|
for (i = sfxlen - 1; i >= 0; i--) {
|
|
fpnt[i] = quot % 26 + 'a';
|
|
quot = quot / 26;
|
|
}
|
|
if (quot > 0)
|
|
errx(1, "too many files.");
|
|
++fnum;
|
|
if ((ofd = open(fname, O_WRONLY | O_CREAT | O_TRUNC, DEFFILEMODE)) < 0)
|
|
err(1, "%s", fname);
|
|
}
|
|
|
|
static size_t
|
|
bigwrite(int fd, const void *buf, size_t len)
|
|
{
|
|
const char *ptr = buf;
|
|
size_t sofar = 0;
|
|
ssize_t w;
|
|
|
|
while (len != 0) {
|
|
if ((w = write(fd, ptr, len)) == -1)
|
|
return sofar;
|
|
len -= w;
|
|
ptr += w;
|
|
sofar += w;
|
|
}
|
|
return sofar;
|
|
}
|
|
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
(void)fprintf(stderr,
|
|
"usage: %s [-b byte_count] [-l line_count] [-n chunk_count] [-a suffix_length] "
|
|
"[file [prefix]]\n", getprogname());
|
|
exit(1);
|
|
}
|