/*
* 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[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/capsicum.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <locale.h>
#include <nl_types.h>
#include <stdint.h>
#define _WITH_GETLINE
#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 int numchars, numfields, 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;
cap_rights_t rights;
(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");
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");
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)
{
int 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[])
{
int 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);
}
