514 lines
12 KiB
C
514 lines
12 KiB
C
/* $NetBSD: str.c,v 1.28 2001/03/06 10:29:11 wiz 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 1.28 2001/03/06 10:29:11 wiz 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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typedef enum deweyop_t {
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GT,
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GE,
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LT,
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LE
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} deweyop_t;
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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 *a, deweyop_t op, char *b)
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{
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int ad;
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int bd;
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char *a_nb;
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char *b_nb;
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int in_nb = 0;
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int cmp;
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assert(a != NULL);
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assert(b != NULL);
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/* Null out 'n' in any "nb" suffixes for initial pass */
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if ((a_nb = strstr(a, "nb")))
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*a_nb = 0;
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if ((b_nb = strstr(b, "nb")))
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*b_nb = 0;
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for (;;) {
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if (*a == 0 && *b == 0) {
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if (!in_nb && (a_nb || b_nb)) {
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/*
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* If exact match on first pass, test
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* "nb<X>" suffixes in second pass
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*/
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in_nb = 1;
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if (a_nb)
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a = a_nb + 2; /* Skip "nb" suffix */
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if (b_nb)
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b = b_nb + 2; /* Skip "nb" suffix */
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} else {
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cmp = 0;
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break;
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}
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}
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ad = bd = 0;
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for (; *a && *a != '.'; a++) {
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ad = (ad * 10) + (*a - '0');
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}
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for (; *b && *b != '.'; b++) {
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bd = (bd * 10) + (*b - '0');
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}
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if ((cmp = ad - bd) != 0) {
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break;
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}
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if (*a == '.')
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++a;
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if (*b == '.')
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++b;
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}
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/* Replace any nulled 'n' */
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if (a_nb)
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*a_nb = 'n';
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if (b_nb)
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*b_nb = 'n';
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return (op == GE) ? cmp >= 0 : (op == GT) ? cmp > 0 : (op == LE) ? cmp <= 0 : cmp < 0;
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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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deweyop_t op;
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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 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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op = (*sep == '>') ? (*(sep + 1) == '=') ? GE : GT : (*(sep + 1) == '=') ? LE : LT;
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ver = (op == GE || op == LE) ? sep + 2 : sep + 1;
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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 && n == 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_tgz, *file_tgz; /* ptr to .tgz */
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char *pat_tbz, *file_tbz; /* ptr to .tbz */
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char *pat_tbgz, *file_tbgz; /* ptr to .t[bg]z */
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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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strcpy(tmp_pattern, pattern);
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pat_sfx[0] = '\0';
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pat_tgz = strstr(tmp_pattern, ".tgz");
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if (pat_tgz) {
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/* strip off any ".tgz" */
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strcpy(pat_sfx, pat_tgz);
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*pat_tgz = '\0';
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}
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pat_tbz = strstr(tmp_pattern, ".tbz");
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if (pat_tbz) {
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/* strip off any ".tbz" */
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strcpy(pat_sfx, pat_tbz);
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*pat_tbz = '\0';
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}
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pat_tbgz = strstr(tmp_pattern, ".t[bg]z");
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if (pat_tbgz) {
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/* strip off any ".t[bg]z" */
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strcpy(pat_sfx, pat_tbgz);
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*pat_tbgz = '\0';
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}
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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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strcpy(tmp_file, dp->d_name);
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file_sfx[0] = '\0';
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file_tgz = strstr(tmp_file, ".tgz");
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if (file_tgz) {
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/* strip off any ".tgz" */
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strcpy(file_sfx, file_tgz);
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*file_tgz = '\0';
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}
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file_tbz = strstr(tmp_file, ".tbz");
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if (file_tbz) {
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/* strip off any ".tbz" */
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strcpy(file_sfx, file_tbz);
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*file_tbz = '\0';
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}
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file_tbgz = strstr(tmp_file, ".t[bg]z");
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if (file_tbgz) {
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/* strip off any ".t[bg]z" */
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strcpy(file_sfx, file_tbgz);
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*file_tbgz = '\0';
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}
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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_tgz, *best_tgz;
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char *found_tbz, *best_tbz;
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char *found_tbgz, *best_tbgz;
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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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found_tgz = strstr(found, ".tgz");
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if (found_tgz) {
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/* strip off any ".tgz" */
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strncpy(found_no_sfx, found_version, found_tgz-found_version);
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found_no_sfx[found_tgz-found_version] = '\0';
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found_version = found_no_sfx;
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}
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found_tbz = strstr(found, ".tbz");
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if (found_tbz) {
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/* strip off any ".tbz" */
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strncpy(found_no_sfx, found_version, found_tbz-found_version);
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found_no_sfx[found_tbz-found_version] = '\0';
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found_version = found_no_sfx;
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}
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found_tbgz = strstr(found, ".t[bg]z");
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if (found_tbgz) {
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/* strip off any ".t[bg]z" */
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strncpy(found_no_sfx, found_version, found_tbgz-found_version);
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found_no_sfx[found_tbgz-found_version] = '\0';
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found_version = found_no_sfx;
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}
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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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best_tgz = strstr(best, ".tgz");
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if (best_tgz) {
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/* strip off any ".tgz" */
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strncpy(best_no_sfx, best_version, best_tgz-best_version);
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best_no_sfx[best_tgz-best_version] = '\0';
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best_version = best_no_sfx;
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}
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best_tbz = strstr(best, ".tbz");
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if (best_tbz) {
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/* strip off any ".tbz" */
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strncpy(best_no_sfx, best_version, best_tbz-best_version);
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best_no_sfx[best_tbz-best_version] = '\0';
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best_version = best_no_sfx;
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}
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best_tbgz = strstr(best, ".t[bg]z");
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if (best_tbgz) {
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/* strip off any ".t[bg]z" */
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strncpy(best_no_sfx, best_version, best_tbgz-best_version);
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best_no_sfx[best_tbgz-best_version] = '\0';
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best_version = best_no_sfx;
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}
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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)
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{
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size_t len;
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if ((len = cc) >= tosize - 1) {
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len = tosize - 1;
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}
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(void) strncpy(to, from, len);
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to[len] = 0;
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return to;
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}
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