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-rw-r--r--text_cmds/uniq/uniq.c367
1 files changed, 367 insertions, 0 deletions
diff --git a/text_cmds/uniq/uniq.c b/text_cmds/uniq/uniq.c
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+++ b/text_cmds/uniq/uniq.c
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+/*
+ * Copyright (c) 1989, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Case Larsen.
+ *
+ * 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.
+ */
+
+#ifndef lint
+static const char copyright[] =
+"@(#) Copyright (c) 1989, 1993\n\
+ The Regents of the University of California. All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)uniq.c 8.3 (Berkeley) 5/4/95";
+#endif
+static const char rcsid[] =
+ "$FreeBSD: head/usr.bin/uniq/uniq.c 303526 2016-07-30 01:07:47Z bapt $";
+#endif /* not lint */
+
+#ifndef __APPLE__
+#include <sys/capsicum.h>
+#endif
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <limits.h>
+#include <locale.h>
+#include <nl_types.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <termios.h>
+#include <unistd.h>
+#include <wchar.h>
+#include <wctype.h>
+
+static int cflag, dflag, uflag, iflag;
+static long numchars, numfields;
+static int repeats;
+
+static FILE *file(const char *, const char *);
+static wchar_t *convert(const char *);
+static int inlcmp(const char *, const char *);
+static void show(FILE *, const char *);
+static wchar_t *skip(wchar_t *);
+static void obsolete(char *[]);
+static void usage(void);
+
+static void
+strerror_init(void)
+{
+
+ /*
+ * Cache NLS data before entering capability mode.
+ * XXXPJD: There should be strerror_init() and strsignal_init() in libc.
+ */
+ (void)catopen("libc", NL_CAT_LOCALE);
+}
+
+int
+main (int argc, char *argv[])
+{
+ wchar_t *tprev, *tthis;
+ FILE *ifp, *ofp;
+ int ch, comp;
+ size_t prevbuflen, thisbuflen, b1;
+ char *prevline, *thisline, *p;
+ const char *ifn;
+#ifndef __APPLE__
+ cap_rights_t rights;
+#endif
+
+ (void) setlocale(LC_ALL, "");
+
+ obsolete(argv);
+ while ((ch = getopt(argc, argv, "cdif:s:u")) != -1)
+ switch (ch) {
+ case 'c':
+ cflag = 1;
+ break;
+ case 'd':
+ dflag = 1;
+ break;
+ case 'i':
+ iflag = 1;
+ break;
+ case 'f':
+ numfields = strtol(optarg, &p, 10);
+ if (numfields < 0 || *p)
+ errx(1, "illegal field skip value: %s", optarg);
+ break;
+ case 's':
+ numchars = strtol(optarg, &p, 10);
+ if (numchars < 0 || *p)
+ errx(1, "illegal character skip value: %s", optarg);
+ break;
+ case 'u':
+ uflag = 1;
+ break;
+ case '?':
+ default:
+ usage();
+ }
+
+ argc -= optind;
+ argv += optind;
+
+ /* If no flags are set, default is -d -u. */
+ if (cflag) {
+ if (dflag || uflag)
+ usage();
+ } else if (!dflag && !uflag)
+ dflag = uflag = 1;
+
+ if (argc > 2)
+ usage();
+
+ ifp = stdin;
+ ifn = "stdin";
+ ofp = stdout;
+ if (argc > 0 && strcmp(argv[0], "-") != 0)
+ ifp = file(ifn = argv[0], "r");
+#ifndef __APPLE__
+ cap_rights_init(&rights, CAP_FSTAT, CAP_READ);
+ if (cap_rights_limit(fileno(ifp), &rights) < 0 && errno != ENOSYS)
+ err(1, "unable to limit rights for %s", ifn);
+ cap_rights_init(&rights, CAP_FSTAT, CAP_WRITE);
+ if (argc > 1)
+ ofp = file(argv[1], "w");
+ else
+ cap_rights_set(&rights, CAP_IOCTL);
+ if (cap_rights_limit(fileno(ofp), &rights) < 0 && errno != ENOSYS) {
+ err(1, "unable to limit rights for %s",
+ argc > 1 ? argv[1] : "stdout");
+ }
+ if (cap_rights_is_set(&rights, CAP_IOCTL)) {
+ unsigned long cmd;
+
+ cmd = TIOCGETA; /* required by isatty(3) in printf(3) */
+
+ if (cap_ioctls_limit(fileno(ofp), &cmd, 1) < 0 &&
+ errno != ENOSYS) {
+ err(1, "unable to limit ioctls for %s",
+ argc > 1 ? argv[1] : "stdout");
+ }
+ }
+
+ strerror_init();
+ if (cap_enter() < 0 && errno != ENOSYS)
+ err(1, "unable to enter capability mode");
+#else
+ if (argc > 1)
+ ofp = file(argv[1], "w");
+ strerror_init();
+#endif
+
+ prevbuflen = thisbuflen = 0;
+ prevline = thisline = NULL;
+
+ if (getline(&prevline, &prevbuflen, ifp) < 0) {
+ if (ferror(ifp))
+ err(1, "%s", ifn);
+ exit(0);
+ }
+ tprev = convert(prevline);
+
+ if (!cflag && uflag && dflag)
+ show(ofp, prevline);
+
+ tthis = NULL;
+ while (getline(&thisline, &thisbuflen, ifp) >= 0) {
+ if (tthis != NULL)
+ free(tthis);
+ tthis = convert(thisline);
+
+ if (tthis == NULL && tprev == NULL)
+ comp = inlcmp(thisline, prevline);
+ else if (tthis == NULL || tprev == NULL)
+ comp = 1;
+ else
+ comp = wcscoll(tthis, tprev);
+
+ if (comp) {
+ /* If different, print; set previous to new value. */
+ if (cflag || !dflag || !uflag)
+ show(ofp, prevline);
+ p = prevline;
+ b1 = prevbuflen;
+ prevline = thisline;
+ prevbuflen = thisbuflen;
+ if (tprev != NULL)
+ free(tprev);
+ tprev = tthis;
+ if (!cflag && uflag && dflag)
+ show(ofp, prevline);
+ thisline = p;
+ thisbuflen = b1;
+ tthis = NULL;
+ repeats = 0;
+ } else
+ ++repeats;
+ }
+ if (ferror(ifp))
+ err(1, "%s", ifn);
+ if (cflag || !dflag || !uflag)
+ show(ofp, prevline);
+ exit(0);
+}
+
+static wchar_t *
+convert(const char *str)
+{
+ size_t n;
+ wchar_t *buf, *ret, *p;
+
+ if ((n = mbstowcs(NULL, str, 0)) == (size_t)-1)
+ return (NULL);
+ if (SIZE_MAX / sizeof(*buf) < n + 1)
+ errx(1, "conversion buffer length overflow");
+ if ((buf = malloc((n + 1) * sizeof(*buf))) == NULL)
+ err(1, "malloc");
+ if (mbstowcs(buf, str, n + 1) != n)
+ errx(1, "internal mbstowcs() error");
+ /* The last line may not end with \n. */
+ if (n > 0 && buf[n - 1] == L'\n')
+ buf[n - 1] = L'\0';
+
+ /* If requested get the chosen fields + character offsets. */
+ if (numfields || numchars) {
+ if ((ret = wcsdup(skip(buf))) == NULL)
+ err(1, "wcsdup");
+ free(buf);
+ } else
+ ret = buf;
+
+ if (iflag) {
+ for (p = ret; *p != L'\0'; p++)
+ *p = towlower(*p);
+ }
+
+ return (ret);
+}
+
+static int
+inlcmp(const char *s1, const char *s2)
+{
+ int c1, c2;
+
+ while (*s1 == *s2++)
+ if (*s1++ == '\0')
+ return (0);
+ c1 = (unsigned char)*s1;
+ c2 = (unsigned char)*(s2 - 1);
+ /* The last line may not end with \n. */
+ if (c1 == '\n')
+ c1 = '\0';
+ if (c2 == '\n')
+ c2 = '\0';
+ return (c1 - c2);
+}
+
+/*
+ * show --
+ * Output a line depending on the flags and number of repetitions
+ * of the line.
+ */
+static void
+show(FILE *ofp, const char *str)
+{
+
+ if (cflag)
+ (void)fprintf(ofp, "%4d %s", repeats + 1, str);
+ if ((dflag && repeats) || (uflag && !repeats))
+ (void)fprintf(ofp, "%s", str);
+}
+
+static wchar_t *
+skip(wchar_t *str)
+{
+ long nchars, nfields;
+
+ for (nfields = 0; *str != L'\0' && nfields++ != numfields; ) {
+ while (iswblank(*str))
+ str++;
+ while (*str != L'\0' && !iswblank(*str))
+ str++;
+ }
+ for (nchars = numchars; nchars-- && *str != L'\0'; ++str)
+ ;
+ return(str);
+}
+
+static FILE *
+file(const char *name, const char *mode)
+{
+ FILE *fp;
+
+ if ((fp = fopen(name, mode)) == NULL)
+ err(1, "%s", name);
+ return(fp);
+}
+
+static void
+obsolete(char *argv[])
+{
+ size_t len;
+ char *ap, *p, *start;
+
+ while ((ap = *++argv)) {
+ /* Return if "--" or not an option of any form. */
+ if (ap[0] != '-') {
+ if (ap[0] != '+')
+ return;
+ } else if (ap[1] == '-')
+ return;
+ if (!isdigit((unsigned char)ap[1]))
+ continue;
+ /*
+ * Digit signifies an old-style option. Malloc space for dash,
+ * new option and argument.
+ */
+ len = strlen(ap);
+ if ((start = p = malloc(len + 3)) == NULL)
+ err(1, "malloc");
+ *p++ = '-';
+ *p++ = ap[0] == '+' ? 's' : 'f';
+ (void)strcpy(p, ap + 1);
+ *argv = start;
+ }
+}
+
+static void
+usage(void)
+{
+ (void)fprintf(stderr,
+"usage: uniq [-c | -d | -u] [-i] [-f fields] [-s chars] [input [output]]\n");
+ exit(1);
+}
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