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mirror of https://git.FreeBSD.org/src.git synced 2024-12-15 10:17:20 +00:00
freebsd/usr.bin/split/split.c
Rodney W. Grimes a3f8d23a48 This fixes 'split -l NNN foo'. As it stands split will
complain about an 'illegal line count' becuase it's looking
at the wrong end pointer (ep) to detect any extra characters
after the NNN.

Submitted by:	Rich Murphey <rich@freebsd.org>

This should probably get pulled into 2.0.6 and 2.1.0
1995-07-07 08:23:52 +00:00

289 lines
6.7 KiB
C

/*
* 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
static char sccsid[] = "@(#)split.c 8.2 (Berkeley) 4/16/94";
#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);
}