597 lines
13 KiB
C
597 lines
13 KiB
C
/* $NetBSD: str.c,v 1.32 2002/01/09 16:17:08 agc Exp $ */
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static const char *rcsid = "Id: str.c,v 1.5 1997/10/08 07:48:21 charnier Exp";
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#else
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__RCSID("$NetBSD: str.c,v 1.32 2002/01/09 16:17:08 agc Exp $");
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#endif
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#endif
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/*
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* FreeBSD install - a package for the installation and maintainance
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* of non-core utilities.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* Jordan K. Hubbard
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* 18 July 1993
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*
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* Miscellaneous string utilities.
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*
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*/
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#include <assert.h>
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#include <err.h>
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#include <fnmatch.h>
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#include "lib.h"
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/*
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* Return the filename portion of a path
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*/
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char *
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basename_of(char *str)
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{
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char *slash;
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return ((slash = strrchr(str, '/')) == (char *) NULL) ? str : slash + 1;
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}
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/*
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* Return the dirname portion of a path
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*/
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char *
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dirname_of(const char *path)
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{
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size_t cc;
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char *s;
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char *t;
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if ((s = strrchr(path, '/')) == NULL) {
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return ".";
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}
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if (s == path) {
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/* "/foo" -> return "/" */
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return "/";
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}
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cc = (size_t) (s - path);
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if ((t = (char *) malloc(cc + 1)) == (char *) NULL) {
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errx(1, "out of memory in dirname_of");
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}
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(void) memcpy(t, path, cc);
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t[cc] = 0;
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return t;
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}
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/*
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* Get a string parameter as a file spec or as a "contents follow -" spec
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*/
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char *
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get_dash_string(char **s)
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{
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return *s = (**s == '-') ? strdup(*s + 1) : fileGetContents(*s);
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}
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/*
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* Lowercase a whole string
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*/
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void
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str_lowercase(char *s)
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{
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for (; *s; s++) {
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*s = tolower(*s);
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}
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}
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/* pull in definitions and macros for resizing arrays as we go */
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#include "defs.h"
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/* do not modify these values, or things will NOT work */
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enum {
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RC = -1,
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Dot = 0,
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Patch = 1
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};
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/* this struct defines a version number */
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typedef struct arr_t {
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unsigned c; /* # of version numbers */
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unsigned size; /* size of array */
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int64_t *v; /* array of decimal numbers */
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int64_t netbsd; /* any "nb" suffix */
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} arr_t;
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/* this struct describes a test */
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typedef struct test_t {
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const char *s; /* string representation */
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unsigned len; /* length of string */
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int t; /* enumerated type of test */
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} test_t;
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enum {
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LT,
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LE,
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EQ,
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GE,
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GT,
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NE
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};
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/* the tests that are recognised. */
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static test_t tests[] = {
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{ "<=", 2, LE },
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{ "<", 1, LT },
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{ ">=", 2, GE },
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{ ">", 1, GT },
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{ "==", 2, EQ },
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{ "!=", 2, NE },
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{ NULL, 0, 0 }
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};
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/* locate the test in the tests array */
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static int
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mktest(int *op, char *test)
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{
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test_t *tp;
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for (tp = tests ; tp->s ; tp++) {
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if (strncasecmp(test, tp->s, tp->len) == 0) {
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*op = tp->t;
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return tp->len;
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}
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}
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warnx("relational tets not found `%.10s'", test);
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return -1;
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}
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/*
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* make a component of a version number.
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* '.' encodes as Dot which is '0'
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* '_' encodes as 'patch level', or 'Dot', which is 0.
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* 'pl' encodes as 'patch level', or 'Dot', which is 0.
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* 'rc' encodes as 'release candidate', or RC, which is -1.
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* 'nb' encodes as 'netbsd version', which is used after all other tests
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*/
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static int
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mkcomponent(arr_t *ap, char *num)
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{
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static const char alphas[] = "abcdefghijklmnopqrstuvwxyz";
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int64_t n;
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char *cp;
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if (*num == 0) {
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return 0;
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}
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ALLOC(int64_t, ap->v, ap->size, ap->c, 62, "mkver", exit(EXIT_FAILURE));
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if (*num == '_') {
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num += 1;
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if (isdigit(*(num + 1))) {
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ap->v[ap->c++] = Dot;
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return 1;
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}
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}
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if (isdigit(*num)) {
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for (cp = num, n = 0 ; isdigit(*num) ; num++) {
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n = (n * 10) + (*num - '0');
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}
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ap->v[ap->c++] = n;
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return (int)(num - cp);
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}
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if (strncasecmp(num, "rc", 2) == 0) {
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ap->v[ap->c++] = RC;
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return 2;
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}
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if (strncasecmp(num, "pl", 2) == 0) {
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ap->v[ap->c++] = Dot;
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return 2;
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}
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if (strncasecmp(num, "nb", 2) == 0) {
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for (cp = num, num += 2, n = 0 ; isdigit(*num) ; num++) {
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n = (n * 10) + (*num - '0');
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}
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ap->netbsd = n;
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return (int)(num - cp);
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}
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if (*num == '.') {
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ap->v[ap->c++] = Dot;
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return 1;
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}
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if (isalpha(*num)) {
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ap->v[ap->c++] = Dot;
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cp = strchr(alphas, tolower(*num));
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ALLOC(int64_t, ap->v, ap->size, ap->c, 62, "mkver", exit(EXIT_FAILURE));
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ap->v[ap->c++] = (int64_t)(cp - alphas) + 1;
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return 1;
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}
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warnx("`%c' not recognised", *num);
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return 1;
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}
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/* make a version number string into an array of comparable 64bit ints */
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static int
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mkversion(arr_t *ap, char *num)
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{
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(void) memset(ap, 0, sizeof(arr_t));
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while (*num) {
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num += mkcomponent(ap, num);
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}
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return 1;
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}
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#define DIGIT(v, c, n) (((n) < (c)) ? v[n] : 0)
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/* compare the result against the test we were expecting */
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static int
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result(int64_t cmp, int tst)
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{
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switch(tst) {
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case LT:
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return cmp < 0;
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case LE:
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return cmp <= 0;
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case GT:
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return cmp > 0;
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case GE:
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return cmp >= 0;
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case EQ:
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return cmp == 0;
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case NE:
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return cmp != 0;
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default:
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warnx("result: unknown test %d", tst);
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return 0;
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}
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}
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/* do the test on the 2 vectors */
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static int
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vtest(arr_t *lhs, int tst, arr_t *rhs)
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{
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int64_t cmp;
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int c;
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int i;
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for (i = 0, c = MAX(lhs->c, rhs->c) ; i < c ; i++) {
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if ((cmp = DIGIT(lhs->v, lhs->c, i) - DIGIT(rhs->v, rhs->c, i)) != 0) {
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return result(cmp, tst);
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}
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}
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return result(lhs->netbsd - rhs->netbsd, tst);
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}
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/*
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* Compare two dewey decimal numbers
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*/
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static int
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deweycmp(char *lhs, int op, char *rhs)
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{
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arr_t right;
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arr_t left;
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(void) memset(&left, 0, sizeof(left));
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if (!mkversion(&left, lhs)) {
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warnx("Bad lhs version `%s'", lhs);
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return 0;
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}
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(void) memset(&right, 0, sizeof(right));
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if (!mkversion(&right, rhs)) {
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warnx("Bad rhs version `%s'", rhs);
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return 0;
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}
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return vtest(&left, op, &right);
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}
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/*
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* Perform alternate match on "pkg" against "pattern",
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* calling pmatch (recursively) to resolve any other patterns.
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* Return 1 on match, 0 otherwise
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*/
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static int
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alternate_match(const char *pattern, const char *pkg)
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{
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char *sep;
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char buf[FILENAME_MAX];
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char *last;
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char *alt;
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char *cp;
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int cnt;
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int found;
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if ((sep = strchr(pattern, '{')) == (char *) NULL) {
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errx(1, "alternate_match(): '{' expected in `%s'", pattern);
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}
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(void) strncpy(buf, pattern, (size_t) (sep - pattern));
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alt = &buf[sep - pattern];
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last = (char *) NULL;
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for (cnt = 0, cp = sep; *cp && last == (char *) NULL; cp++) {
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if (*cp == '{') {
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cnt++;
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} else if (*cp == '}' && --cnt == 0 && last == (char *) NULL) {
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last = cp + 1;
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}
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}
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if (cnt != 0) {
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errx(1, "Malformed alternate `%s'", pattern);
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}
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for (found = 0, cp = sep + 1; *sep != '}'; cp = sep + 1) {
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for (cnt = 0, sep = cp; cnt > 0 || (cnt == 0 && *sep != '}' && *sep != ','); sep++) {
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if (*sep == '{') {
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cnt++;
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} else if (*sep == '}') {
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cnt--;
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}
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}
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(void) snprintf(alt, sizeof(buf) - (alt - buf), "%.*s%s", (int) (sep - cp), cp, last);
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if (pmatch(buf, pkg) == 1) {
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found = 1;
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}
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}
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return found;
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}
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/*
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* Perform dewey match on "pkg" against "pattern".
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* Return 1 on match, 0 otherwise
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*/
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static int
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dewey_match(const char *pattern, const char *pkg)
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{
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char *cp;
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char *sep;
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char *ver;
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char name[FILENAME_MAX];
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int op;
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int n;
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if ((sep = strpbrk(pattern, "<>")) == NULL) {
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errx(1, "dewey_match(): '<' or '>' expected in `%s'", pattern);
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}
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(void) snprintf(name, sizeof(name), "%.*s", (int) (sep - pattern), pattern);
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if ((n = mktest(&op, sep)) < 0) {
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warnx("Bad comparison `%s'", sep);
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return 0;
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}
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ver = sep + n;
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n = (int) (sep - pattern);
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if ((cp = strrchr(pkg, '-')) != (char *) NULL) {
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if (strncmp(pkg, name, (size_t) (cp - pkg)) == 0 &&
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n == (int)(cp - pkg)) {
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if (deweycmp(cp + 1, op, ver)) {
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return 1;
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}
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}
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}
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return 0;
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}
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/*
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* Perform glob match on "pkg" against "pattern".
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* Return 1 on match, 0 otherwise
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*/
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static int
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glob_match(const char *pattern, const char *pkg)
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{
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return fnmatch(pattern, pkg, FNM_PERIOD) == 0;
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}
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/*
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* Perform simple match on "pkg" against "pattern".
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* Return 1 on match, 0 otherwise
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*/
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static int
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simple_match(const char *pattern, const char *pkg)
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{
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return strcmp(pattern, pkg) == 0;
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}
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/*
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* Match pkg against pattern, return 1 if matching, 0 else
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*/
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int
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pmatch(const char *pattern, const char *pkg)
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{
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if (strchr(pattern, '{') != (char *) NULL) {
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/* emulate csh-type alternates */
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return alternate_match(pattern, pkg);
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}
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if (strpbrk(pattern, "<>") != (char *) NULL) {
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/* perform relational dewey match on version number */
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return dewey_match(pattern, pkg);
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}
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if (strpbrk(pattern, "*?[]") != (char *) NULL) {
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/* glob match */
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return glob_match(pattern, pkg);
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}
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/* no alternate, dewey or glob match -> simple compare */
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return simple_match(pattern, pkg);
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}
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/*
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* Search dir for pattern, calling match(pkg_found, data) for every match.
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* Returns -1 on error, 1 if found, 0 otherwise.
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*/
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int
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findmatchingname(const char *dir, const char *pattern, matchfn match, char *data)
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{
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struct dirent *dp;
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char tmp_pattern[256];
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DIR *dirp;
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int found;
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char pat_sfx[256], file_sfx[256]; /* suffixes */
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found = 0;
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if ((dirp = opendir(dir)) == (DIR *) NULL) {
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/* warnx("can't opendir dir '%s'", dir); */
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return -1;
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}
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/* chop any possible suffix off of 'pattern' and
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* store it in pat_sfx
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*/
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strip_txz(tmp_pattern, pat_sfx, pattern);
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while ((dp = readdir(dirp)) != (struct dirent *) NULL) {
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char tmp_file[FILENAME_MAX];
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if (strcmp(dp->d_name, ".") == 0 ||
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strcmp(dp->d_name, "..") == 0)
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continue;
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/* chop any possible suffix off of 'tmp_file' and
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* store it in file_sfx
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*/
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strip_txz(tmp_file, file_sfx, dp->d_name);
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/* we need to match pattern and suffix separately, in case
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* each is a different pattern class (e.g. dewey and
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* character class (.t[bg]z)) */
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if (pmatch(tmp_pattern, tmp_file)
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&& pmatch(pat_sfx, file_sfx)) {
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if (match) {
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match(dp->d_name, data);
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/* return value ignored for now */
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}
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found = 1;
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}
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}
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(void) closedir(dirp);
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return found;
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}
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/*
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* Does the pkgname contain any of the special chars ("{[]?*<>")?
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* If so, return 1, else 0
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*/
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int
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ispkgpattern(const char *pkg)
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{
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return strpbrk(pkg, "<>[]?*{") != NULL;
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}
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/*
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* Auxiliary function called by findbestmatchingname() if pkg > data
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* Also called for FTP matching
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*/
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int
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findbestmatchingname_fn(const char *found, char *best)
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{
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char *found_version, *best_version;
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char found_no_sfx[255];
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char best_no_sfx[255];
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/* The same suffix-hack-off again, but we can't do it
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* otherwise without changing the function call interface
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*/
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found_version = strrchr(found, '-');
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if (found_version) {
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/* skip '-', if any version found */
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found_version++;
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}
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strip_txz(found_no_sfx, NULL, found_version);
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found_version = found_no_sfx;
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best_version=NULL;
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if (best && best[0] != '\0') {
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best_version = strrchr(best, '-');
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if (best_version) {
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/* skip '-' if any version found */
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best_version++;
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}
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strip_txz(best_no_sfx, NULL, best_version);
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best_version = best_no_sfx;
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}
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if (found_version == NULL) {
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fprintf(stderr, "'%s' is not a usable package(version)\n",
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found);
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} else {
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/* if best_version==NULL only if best==NULL
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* (or best[0]='\0') */
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if (best == NULL || best[0] == '\0' || deweycmp(found_version, GT, best_version)) {
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/* found pkg(version) is bigger than current "best"
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* version - remember! */
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strcpy(best, found);
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}
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}
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return 0;
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}
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/*
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* Find best matching filename, i.e. the pkg with the highest
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* matching(!) version.
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* Returns pointer to pkg name (which can be free(3)ed),
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* or NULL if no match is available.
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*/
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char *
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findbestmatchingname(const char *dir, const char *pattern)
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{
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char buf[FILENAME_MAX];
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buf[0] = '\0';
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if (findmatchingname(dir, pattern, findbestmatchingname_fn, buf) > 0
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&& buf[0] != '\0') {
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return strdup(buf);
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}
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return NULL;
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}
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/*
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* Bounds-checking strncpy()
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*/
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char *
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strnncpy(char *to, size_t tosize, char *from, size_t cc)
|
|
{
|
|
size_t len;
|
|
|
|
if ((len = cc) >= tosize - 1) {
|
|
len = tosize - 1;
|
|
}
|
|
(void) strncpy(to, from, len);
|
|
to[len] = 0;
|
|
return to;
|
|
}
|
|
|
|
/*
|
|
* Strip off any .tgz, .tbz or .t[bg]z suffix from fname,
|
|
* and copy into buffer "buf", the suffix is stored in "sfx"
|
|
* if "sfx" is not NULL. If no suffix is found, "sfx" is set
|
|
* to an empty string.
|
|
*/
|
|
void
|
|
strip_txz(char *buf, char *sfx, const char *fname)
|
|
{
|
|
char *s;
|
|
|
|
strcpy(buf, fname);
|
|
if (sfx) sfx[0] = '\0';
|
|
|
|
s = strstr(buf, ".tgz");
|
|
if (s) {
|
|
*s = '\0'; /* strip off any ".tgz" */
|
|
if (sfx) strcpy(sfx, s - buf + fname);
|
|
}
|
|
|
|
s = strstr(buf, ".tbz");
|
|
if (s) {
|
|
*s = '\0'; /* strip off any ".tbz" */
|
|
if (sfx) strcpy(sfx, s - buf + fname);
|
|
}
|
|
|
|
s = strstr(buf, ".t[bg]z");
|
|
if (s) {
|
|
*s = '\0'; /* strip off any ".t[bg]z" */
|
|
if (sfx) strcpy(sfx, s - buf + fname);
|
|
}
|
|
}
|