294 lines
6.8 KiB
C
294 lines
6.8 KiB
C
/* $NetBSD: split.c,v 1.5 1995/08/31 22:22:05 jtc 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char copyright[] =
|
|
"@(#) Copyright (c) 1987, 1993, 1994\n\
|
|
The Regents of the University of California. All rights reserved.\n";
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)split.c 8.3 (Berkeley) 4/25/94";
|
|
#endif
|
|
static char rcsid[] = "$NetBSD: split.c,v 1.5 1995/08/31 22:22:05 jtc Exp $";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/param.h>
|
|
|
|
#include <ctype.h>
|
|
#include <err.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#define DEFLINE 1000 /* Default num lines per file. */
|
|
|
|
long bytecnt; /* Byte count to split on. */
|
|
long numlines; /* Line count to split on. */
|
|
int file_open; /* If a file open. */
|
|
int ifd = -1, ofd = -1; /* Input/output file descriptors. */
|
|
char bfr[MAXBSIZE]; /* I/O buffer. */
|
|
char fname[MAXPATHLEN]; /* File name prefix. */
|
|
|
|
void newfile __P((void));
|
|
void split1 __P((void));
|
|
void split2 __P((void));
|
|
void usage __P((void));
|
|
|
|
int
|
|
main(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
int ch;
|
|
char *ep, *p;
|
|
|
|
while ((ch = getopt(argc, argv, "-0123456789b:l:")) != EOF)
|
|
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])
|
|
numlines = strtol(++p, &ep, 10);
|
|
else
|
|
numlines =
|
|
strtol(argv[optind] + 1, &ep, 10);
|
|
if (numlines <= 0 || *ep)
|
|
errx(1,
|
|
"%s: illegal line count.", optarg);
|
|
}
|
|
break;
|
|
case '-': /* Undocumented: historic stdin flag. */
|
|
if (ifd != -1)
|
|
usage();
|
|
ifd = 0;
|
|
break;
|
|
case 'b': /* Byte count. */
|
|
if ((bytecnt = strtol(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 *= 1048576;
|
|
break;
|
|
case 'l': /* Line count. */
|
|
if (numlines != 0)
|
|
usage();
|
|
if ((numlines = strtol(optarg, &ep, 10)) <= 0 || *ep)
|
|
errx(1, "%s: illegal line count.", optarg);
|
|
break;
|
|
default:
|
|
usage();
|
|
}
|
|
argv += optind;
|
|
argc -= optind;
|
|
|
|
if (*argv != NULL)
|
|
if (ifd == -1) { /* Input file. */
|
|
if ((ifd = open(*argv, O_RDONLY, 0)) < 0)
|
|
err(1, "%s", *argv);
|
|
++argv;
|
|
}
|
|
if (*argv != NULL) /* File name prefix. */
|
|
(void)strcpy(fname, *argv++);
|
|
if (*argv != NULL)
|
|
usage();
|
|
|
|
if (numlines == 0)
|
|
numlines = DEFLINE;
|
|
else if (bytecnt)
|
|
usage();
|
|
|
|
if (ifd == -1) /* Stdin by default. */
|
|
ifd = 0;
|
|
|
|
if (bytecnt) {
|
|
split1();
|
|
exit (0);
|
|
}
|
|
split2();
|
|
exit(0);
|
|
}
|
|
|
|
/*
|
|
* split1 --
|
|
* Split the input by bytes.
|
|
*/
|
|
void
|
|
split1()
|
|
{
|
|
long bcnt;
|
|
int dist, len;
|
|
char *C;
|
|
|
|
for (bcnt = 0;;)
|
|
switch (len = read(ifd, bfr, MAXBSIZE)) {
|
|
case 0:
|
|
exit(0);
|
|
case -1:
|
|
err(1, "read");
|
|
/* NOTREACHED */
|
|
default:
|
|
if (!file_open) {
|
|
newfile();
|
|
file_open = 1;
|
|
}
|
|
if (bcnt + len >= bytecnt) {
|
|
dist = bytecnt - bcnt;
|
|
if (write(ofd, bfr, dist) != dist)
|
|
err(1, "write");
|
|
len -= dist;
|
|
for (C = bfr + dist; len >= bytecnt;
|
|
len -= bytecnt, C += bytecnt) {
|
|
newfile();
|
|
if (write(ofd,
|
|
C, (int)bytecnt) != bytecnt)
|
|
err(1, "write");
|
|
}
|
|
if (len) {
|
|
newfile();
|
|
if (write(ofd, C, len) != len)
|
|
err(1, "write");
|
|
} else
|
|
file_open = 0;
|
|
bcnt = len;
|
|
} else {
|
|
bcnt += len;
|
|
if (write(ofd, bfr, len) != len)
|
|
err(1, "write");
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* split2 --
|
|
* Split the input by lines.
|
|
*/
|
|
void
|
|
split2()
|
|
{
|
|
long lcnt;
|
|
int len, bcnt;
|
|
char *Ce, *Cs;
|
|
|
|
for (lcnt = 0;;)
|
|
switch (len = read(ifd, bfr, MAXBSIZE)) {
|
|
case 0:
|
|
exit(0);
|
|
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 (write(ofd, Cs, bcnt) != bcnt)
|
|
err(1, "write");
|
|
lcnt = 0;
|
|
Cs = Ce + 1;
|
|
if (len)
|
|
newfile();
|
|
else
|
|
file_open = 0;
|
|
}
|
|
if (Cs < Ce) {
|
|
bcnt = Ce - Cs;
|
|
if (write(ofd, Cs, bcnt) != bcnt)
|
|
err(1, "write");
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* newfile --
|
|
* Open a new output file.
|
|
*/
|
|
void
|
|
newfile()
|
|
{
|
|
static long fnum;
|
|
static int defname;
|
|
static char *fpnt;
|
|
|
|
if (ofd == -1) {
|
|
if (fname[0] == '\0') {
|
|
fname[0] = 'x';
|
|
fpnt = fname + 1;
|
|
defname = 1;
|
|
} else {
|
|
fpnt = fname + strlen(fname);
|
|
defname = 0;
|
|
}
|
|
ofd = fileno(stdout);
|
|
}
|
|
/*
|
|
* Hack to increase max files; original code wandered through
|
|
* magic characters. Maximum files is 3 * 26 * 26 == 2028
|
|
*/
|
|
#define MAXFILES 676
|
|
if (fnum == MAXFILES) {
|
|
if (!defname || fname[0] == 'z')
|
|
errx(1, "too many files.");
|
|
++fname[0];
|
|
fnum = 0;
|
|
}
|
|
fpnt[0] = fnum / 26 + 'a';
|
|
fpnt[1] = fnum % 26 + 'a';
|
|
++fnum;
|
|
if (!freopen(fname, "w", stdout))
|
|
err(1, "%s", fname);
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
(void)fprintf(stderr,
|
|
"usage: split [-b byte_count] [-l line_count] [file [prefix]]\n");
|
|
exit(1);
|
|
}
|