/* $NetBSD: uniq.c,v 1.6 1994/12/06 07:51:17 jtc Exp $ */ /* * 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. * 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) 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 8.1 (Berkeley) 6/6/93"; #endif static char rcsid[] = "$NetBSD: uniq.c,v 1.6 1994/12/06 07:51:17 jtc Exp $"; #endif /* not lint */ #include #include #include #include #include #define MAXLINELEN (8 * 1024) int cflag, dflag, uflag; int numchars, numfields, repeats; void err __P((const char *, ...)); FILE *file __P((char *, char *)); void show __P((FILE *, char *)); char *skip __P((char *)); void obsolete __P((char *[])); void usage __P((void)); int main (argc, argv) int argc; char *argv[]; { register char *t1, *t2; FILE *ifp, *ofp; int ch; char *prevline, *thisline, *p; obsolete(argv); while ((ch = getopt(argc, argv, "-cdf:s:u")) != EOF) switch (ch) { case '-': --optind; goto done; case 'c': cflag = 1; break; case 'd': dflag = 1; break; case 'f': numfields = strtol(optarg, &p, 10); if (numfields < 0 || *p) err("illegal field skip value: %s", optarg); break; case 's': numchars = strtol(optarg, &p, 10); if (numchars < 0 || *p) err("illegal character skip value: %s", optarg); break; case 'u': uflag = 1; break; case '?': default: usage(); } done: 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; switch(argc) { case 0: ifp = stdin; ofp = stdout; break; case 1: ifp = file(argv[0], "r"); ofp = stdout; break; case 2: ifp = file(argv[0], "r"); ofp = file(argv[1], "w"); break; default: usage(); } prevline = malloc(MAXLINELEN); thisline = malloc(MAXLINELEN); if (prevline == NULL || thisline == NULL) err("%s", strerror(errno)); if (fgets(prevline, MAXLINELEN, ifp) == NULL) exit(0); while (fgets(thisline, MAXLINELEN, ifp)) { /* If requested get the chosen fields + character offsets. */ if (numfields || numchars) { t1 = skip(thisline); t2 = skip(prevline); } else { t1 = thisline; t2 = prevline; } /* If different, print; set previous to new value. */ if (strcmp(t1, t2)) { show(ofp, prevline); t1 = prevline; prevline = thisline; thisline = t1; repeats = 0; } else ++repeats; } show(ofp, prevline); exit(0); } /* * show -- * Output a line depending on the flags and number of repetitions * of the line. */ void show(ofp, str) FILE *ofp; char *str; { if (cflag) (void)fprintf(ofp, "%4d %s", repeats + 1, str); if (dflag && repeats || uflag && !repeats) (void)fprintf(ofp, "%s", str); } char * skip(str) register char *str; { register int infield, nchars, nfields; for (nfields = numfields, infield = 0; nfields && *str; ++str) if (isspace(*str)) { if (infield) { infield = 0; --nfields; } } else if (!infield) infield = 1; for (nchars = numchars; nchars-- && *str; ++str); return(str); } FILE * file(name, mode) char *name, *mode; { FILE *fp; if ((fp = fopen(name, mode)) == NULL) err("%s: %s", name, strerror(errno)); return(fp); } void obsolete(argv) 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(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("%s", strerror(errno)); *p++ = '-'; *p++ = ap[0] == '+' ? 's' : 'f'; (void)strcpy(p, ap + 1); *argv = start; } } void usage() { (void)fprintf(stderr, "usage: uniq [-c | -du] [-f fields] [-s chars] [input [output]]\n"); exit(1); } #if __STDC__ #include #else #include #endif void #if __STDC__ err(const char *fmt, ...) #else err(fmt, va_alist) char *fmt; va_dcl #endif { va_list ap; #if __STDC__ va_start(ap, fmt); #else va_start(ap); #endif (void)fprintf(stderr, "uniq: "); (void)vfprintf(stderr, fmt, ap); va_end(ap); (void)fprintf(stderr, "\n"); exit(1); /* NOTREACHED */ }