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-rw-r--r--usr.bin/split/split.c394
1 files changed, 394 insertions, 0 deletions
diff --git a/usr.bin/split/split.c b/usr.bin/split/split.c
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+++ b/usr.bin/split/split.c
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+/*
+ * 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.
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#ifndef lint
+static const char copyright[] =
+"@(#) Copyright (c) 1987, 1993, 1994\n\
+ The Regents of the University of California. All rights reserved.\n";
+#endif
+
+#ifndef lint
+static const char sccsid[] = "@(#)split.c 8.2 (Berkeley) 4/16/94";
+#endif
+
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <locale.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <regex.h>
+#include <sysexits.h>
+
+#define DEFLINE 1000 /* Default num lines per file. */
+
+static off_t bytecnt; /* Byte count to split on. */
+static off_t chunks = 0; /* Chunks count to split into. */
+static long numlines; /* Line count to split on. */
+static int file_open; /* If a file open. */
+static int ifd = -1, ofd = -1; /* Input/output file descriptors. */
+static char bfr[MAXBSIZE]; /* I/O buffer. */
+static char fname[MAXPATHLEN]; /* File name prefix. */
+static regex_t rgx;
+static int pflag;
+static long sufflen = 2; /* File name suffix length. */
+
+static void newfile(void);
+static void split1(void);
+static void split2(void);
+static void split3(void);
+static void usage(void);
+
+int
+main(int argc, char **argv)
+{
+ intmax_t bytecnti;
+ long scale;
+ int ch;
+ char *ep, *p;
+
+ setlocale(LC_ALL, "");
+
+ while ((ch = getopt(argc, argv, "0123456789a:b:l:n:p:")) != -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])
+ numlines = strtol(++p, &ep, 10);
+ else
+ numlines =
+ strtol(argv[optind] + 1, &ep, 10);
+ if (numlines <= 0 || *ep)
+ errx(EX_USAGE,
+ "%s: illegal line count", optarg);
+ }
+ break;
+ case 'a': /* Suffix length */
+ if ((sufflen = strtol(optarg, &ep, 10)) <= 0 || *ep)
+ errx(EX_USAGE,
+ "%s: illegal suffix length", optarg);
+ break;
+ case 'b': /* Byte count. */
+ errno = 0;
+ if ((bytecnti = strtoimax(optarg, &ep, 10)) <= 0 ||
+ strchr("kKmMgG", *ep) == NULL || errno != 0)
+ errx(EX_USAGE,
+ "%s: illegal byte count", optarg);
+ if (*ep == 'k' || *ep == 'K')
+ scale = 1024;
+ else if (*ep == 'm' || *ep == 'M')
+ scale = 1024 * 1024;
+ else if (*ep == 'g' || *ep == 'G')
+ scale = 1024 * 1024 * 1024;
+ else
+ scale = 1;
+ if (bytecnti > OFF_MAX / scale)
+ errx(EX_USAGE, "%s: offset too large", optarg);
+ bytecnt = (off_t)(bytecnti * scale);
+ break;
+ case 'l': /* Line count. */
+ if (numlines != 0)
+ usage();
+ if ((numlines = strtol(optarg, &ep, 10)) <= 0 || *ep)
+ errx(EX_USAGE,
+ "%s: illegal line count", optarg);
+ break;
+ case 'n': /* Chunks. */
+ if (!isdigit((unsigned char)optarg[0]) ||
+ (chunks = (size_t)strtoul(optarg, &ep, 10)) == 0 ||
+ *ep != '\0') {
+ errx(EX_USAGE, "%s: illegal number of chunks",
+ optarg);
+ }
+ break;
+
+ case 'p': /* pattern matching. */
+ if (regcomp(&rgx, optarg, REG_EXTENDED|REG_NOSUB) != 0)
+ errx(EX_USAGE, "%s: illegal regexp", optarg);
+ pflag = 1;
+ break;
+ default:
+ usage();
+ }
+ argv += optind;
+ argc -= optind;
+
+ if (*argv != NULL) { /* Input file. */
+ if (strcmp(*argv, "-") == 0)
+ ifd = STDIN_FILENO;
+ else if ((ifd = open(*argv, O_RDONLY, 0)) < 0)
+ err(EX_NOINPUT, "%s", *argv);
+ ++argv;
+ }
+ if (*argv != NULL) /* File name prefix. */
+ if (strlcpy(fname, *argv++, sizeof(fname)) >= sizeof(fname))
+ errx(EX_USAGE, "file name prefix is too long");
+ if (*argv != NULL)
+ usage();
+
+ if (strlen(fname) + (unsigned long)sufflen >= sizeof(fname))
+ errx(EX_USAGE, "suffix is too long");
+ if (pflag && (numlines != 0 || bytecnt != 0 || chunks != 0))
+ usage();
+
+ if (numlines == 0)
+ numlines = DEFLINE;
+ else if (bytecnt != 0 || chunks != 0)
+ usage();
+
+ if (bytecnt && chunks)
+ usage();
+
+ if (ifd == -1) /* Stdin by default. */
+ ifd = 0;
+
+ if (bytecnt) {
+ split1();
+ exit (0);
+ } else if (chunks) {
+ split3();
+ exit (0);
+ }
+ split2();
+ if (pflag)
+ regfree(&rgx);
+ exit(0);
+}
+
+/*
+ * split1 --
+ * Split the input by bytes.
+ */
+static void
+split1(void)
+{
+ off_t bcnt;
+ char *C;
+ ssize_t dist, len;
+ int nfiles;
+
+ nfiles = 0;
+
+ for (bcnt = 0;;)
+ switch ((len = read(ifd, bfr, MAXBSIZE))) {
+ case 0:
+ exit(0);
+ case -1:
+ err(EX_IOERR, "read");
+ /* NOTREACHED */
+ default:
+ if (!file_open) {
+ if (!chunks || (nfiles < chunks)) {
+ newfile();
+ nfiles++;
+ }
+ }
+ if (bcnt + len >= bytecnt) {
+ dist = bytecnt - bcnt;
+ if (write(ofd, bfr, dist) != dist)
+ err(EX_IOERR, "write");
+ len -= dist;
+ for (C = bfr + dist; len >= bytecnt;
+ len -= bytecnt, C += bytecnt) {
+ if (!chunks || (nfiles < chunks)) {
+ newfile();
+ nfiles++;
+ }
+ if (write(ofd,
+ C, bytecnt) != bytecnt)
+ err(EX_IOERR, "write");
+ }
+ if (len != 0) {
+ if (!chunks || (nfiles < chunks)) {
+ newfile();
+ nfiles++;
+ }
+ if (write(ofd, C, len) != len)
+ err(EX_IOERR, "write");
+ } else
+ file_open = 0;
+ bcnt = len;
+ } else {
+ bcnt += len;
+ if (write(ofd, bfr, len) != len)
+ err(EX_IOERR, "write");
+ }
+ }
+}
+
+/*
+ * split2 --
+ * Split the input by lines.
+ */
+static void
+split2(void)
+{
+ long lcnt = 0;
+ FILE *infp;
+
+ /* Stick a stream on top of input file descriptor */
+ if ((infp = fdopen(ifd, "r")) == NULL)
+ err(EX_NOINPUT, "fdopen");
+
+ /* Process input one line at a time */
+ while (fgets(bfr, sizeof(bfr), infp) != NULL) {
+ const int len = strlen(bfr);
+
+ /* If line is too long to deal with, just write it out */
+ if (bfr[len - 1] != '\n')
+ goto writeit;
+
+ /* Check if we need to start a new file */
+ if (pflag) {
+ regmatch_t pmatch;
+
+ pmatch.rm_so = 0;
+ pmatch.rm_eo = len - 1;
+ if (regexec(&rgx, bfr, 0, &pmatch, REG_STARTEND) == 0)
+ newfile();
+ } else if (lcnt++ == numlines) {
+ newfile();
+ lcnt = 1;
+ }
+
+writeit:
+ /* Open output file if needed */
+ if (!file_open)
+ newfile();
+
+ /* Write out line */
+ if (write(ofd, bfr, len) != len)
+ err(EX_IOERR, "write");
+ }
+
+ /* EOF or error? */
+ if (ferror(infp))
+ err(EX_IOERR, "read");
+ else
+ exit(0);
+}
+
+/*
+ * split3 --
+ * Split the input into specified number of chunks
+ */
+static void
+split3(void)
+{
+ 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 */
+ }
+
+ bytecnt = sb.st_size / chunks;
+ split1();
+}
+
+
+/*
+ * newfile --
+ * Open a new output file.
+ */
+static void
+newfile(void)
+{
+ long i, maxfiles, tfnum;
+ static long fnum;
+ static char *fpnt;
+
+ if (ofd == -1) {
+ if (fname[0] == '\0') {
+ fname[0] = 'x';
+ fpnt = fname + 1;
+ } else {
+ fpnt = fname + strlen(fname);
+ }
+ ofd = fileno(stdout);
+ }
+
+ /* maxfiles = 26^sufflen, but don't use libm. */
+ for (maxfiles = 1, i = 0; i < sufflen; i++)
+ if ((maxfiles *= 26) <= 0)
+ errx(EX_USAGE, "suffix is too long (max %ld)", i);
+
+ if (fnum == maxfiles)
+ errx(EX_DATAERR, "too many files");
+
+ /* Generate suffix of sufflen letters */
+ tfnum = fnum;
+ i = sufflen - 1;
+ do {
+ fpnt[i] = tfnum % 26 + 'a';
+ tfnum /= 26;
+ } while (i-- > 0);
+ fpnt[sufflen] = '\0';
+
+ ++fnum;
+ if (!freopen(fname, "w", stdout))
+ err(EX_IOERR, "%s", fname);
+ file_open = 1;
+}
+
+static void
+usage(void)
+{
+ (void)fprintf(stderr,
+"usage: split [-l line_count] [-a suffix_length] [file [prefix]]\n"
+" split -b byte_count[K|k|M|m|G|g] [-a suffix_length] [file [prefix]]\n"
+" split -n chunk_count [-a suffix_length] [file [prefix]]\n"
+" split -p pattern [-a suffix_length] [file [prefix]]\n");
+ exit(EX_USAGE);
+}
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