432 lines
9.6 KiB
C
432 lines
9.6 KiB
C
/* $NetBSD: str.c,v 1.62 2006/04/05 17:50:48 hubertf Exp $ */
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <nbcompat.h>
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#if HAVE_SYS_CDEFS_H
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#include <sys/cdefs.h>
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#endif
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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 1.62 2006/04/05 17:50:48 hubertf 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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#if HAVE_ASSERT_H
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#include <assert.h>
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#endif
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#if HAVE_ERR_H
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#include <err.h>
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#endif
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#if HAVE_FNMATCH_H
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#include <fnmatch.h>
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#endif
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#include "lib.h"
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#include "dewey.h"
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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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/*
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* Return the suffix portion of a path
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*/
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const char *
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suffix_of(const char *str)
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{
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const char *dot;
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return ((dot = strrchr(basename_of(str), '.')) == NULL) ? "" : dot + 1;
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}
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/*
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* Return the filename portion of a path
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*/
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const char *
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basename_of(const char *str)
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{
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const char *slash;
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return ((slash = strrchr(str, '/')) == 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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const 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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static char buf[MaxPathSize];
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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 (cc >= sizeof(buf))
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errx(EXIT_FAILURE, "dirname_of: too long dirname: '%s'", path);
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(void) memcpy(buf, path, cc);
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buf[cc] = 0;
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return buf;
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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(unsigned 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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/*
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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[MaxPathSize];
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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(EXIT_FAILURE, "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(EXIT_FAILURE, "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 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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int ret;
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/* perform relational dewey match on version number */
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ret = dewey_match(pattern, pkg);
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if (ret < 0)
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errx(EXIT_FAILURE, "dewey_match returned error");
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return ret;
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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, void *data)
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{
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struct dirent *dp;
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char tmp_pattern[PKG_PATTERN_MAX];
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DIR *dirp;
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int found;
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char pat_sfx[PKG_SUFFIX_MAX], file_sfx[PKG_SUFFIX_MAX]; /* suffixes */
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if (strlen(pattern) >= PKG_PATTERN_MAX)
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errx(EXIT_FAILURE, "too long pattern '%s'", pattern);
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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[MaxPathSize];
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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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&& (pat_sfx[0] == '\0' || 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, void *vp)
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{
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char *best = vp;
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char *found_version, *best_version;
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char found_no_sfx[PKG_PATTERN_MAX];
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char best_no_sfx[PKG_PATTERN_MAX];
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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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strip_txz(best_no_sfx, NULL, best_version);
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best_version = best_no_sfx;
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} else {
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/* how did this end up in 'best'?
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* Shouldn't happen... */
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fprintf(stderr,
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"'%s' has no usable package(version)\n",
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best);
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found_version = NULL; /* error out cheaply */
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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) {
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if (best[0] == '\0'
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|| dewey_cmp(found_version, DEWEY_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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}
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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[MaxPathSize];
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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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* Strip off any .tgz, .tbz or .t[bg]z suffix from fname,
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* and copy into buffer "buf", the suffix is stored in "sfx"
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* if "sfx" is not NULL. If no suffix is found, "sfx" is set
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* to an empty string.
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*/
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void
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strip_txz(char *buf, char *sfx, const char *fname)
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{
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static const char *const suffixes[] = {
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".tgz", ".tbz", ".t[bg]z", 0};
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const char *const *suffixp;
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size_t len;
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len = strlen(fname);
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assert(len < PKG_PATTERN_MAX);
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if (sfx)
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sfx[0] = '\0';
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for (suffixp = suffixes; *suffixp; suffixp++) {
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size_t suffixlen = strlen(*suffixp);
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if (memcmp(&fname[len - suffixlen], *suffixp, suffixlen))
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continue;
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/* matched! */
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memcpy(buf, fname, len - suffixlen);
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buf[len - suffixlen] = 0;
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if (sfx) {
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if (suffixlen >= PKG_SUFFIX_MAX)
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errx(EXIT_FAILURE, "too long suffix '%s'", fname);
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memcpy(sfx, *suffixp, suffixlen+1);
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return;
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}
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}
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/* not found */
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memcpy(buf, fname, len+1);
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}
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/*
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* Called to see if pkg is already installed as some other version,
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* note found version in "note".
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*/
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int
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note_whats_installed(const char *found, void *vp)
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{
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char *note = vp;
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(void) strlcpy(note, found, MaxPathSize);
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return 0;
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}
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/*
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* alloc lpkg for pkg and add it to list.
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*/
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int
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add_to_list_fn(const char *pkg, void *vp)
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{
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lpkg_head_t *pkgs = vp;
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lpkg_t *lpp;
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char fn[MaxPathSize];
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snprintf(fn, sizeof(fn), "%s/%s", _pkgdb_getPKGDB_DIR(), pkg);
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if (isdir(fn) || islinktodir(fn)) {
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lpp = alloc_lpkg(pkg);
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TAILQ_INSERT_TAIL(pkgs, lpp, lp_link);
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}
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return 0;
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}
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