Mercurial > molko
view libmlk-util/mlk/util/openbsd/dirname.c @ 525:00e7ad6938ae
core: doxygenize image
author | David Demelier <markand@malikania.fr> |
---|---|
date | Sat, 04 Mar 2023 19:26:51 +0100 |
parents | c2124ecb2423 |
children | a2443afe8a1f |
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/* $OpenBSD: dirname.c,v 1.17 2020/10/20 19:30:14 naddy Exp $ */ /* * Copyright (c) 1997, 2004 Todd C. Miller <millert@openbsd.org> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include <errno.h> #include <limits.h> #include <string.h> #include <mlk/util/util.h> char * mlk_util_dirname(char *path) { static char dname[MLK_PATH_MAX]; size_t len; const char *endp; /* Empty or NULL string gets treated as "." */ if (path == NULL || *path == '\0') { dname[0] = '.'; dname[1] = '\0'; return (dname); } /* Strip any trailing slashes */ endp = path + strlen(path) - 1; while (endp > path && *endp == '/') endp--; /* Find the start of the dir */ while (endp > path && *endp != '/') endp--; /* Either the dir is "/" or there are no slashes */ if (endp == path) { dname[0] = *endp == '/' ? '/' : '.'; dname[1] = '\0'; return (dname); } else { /* Move forward past the separating slashes */ do { endp--; } while (endp > path && *endp == '/'); } len = endp - path + 1; if (len >= sizeof(dname)) { #if defined(ENAMETOOLONG) errno = ENAMETOOLONG; #endif return (NULL); } memcpy(dname, path, len); dname[len] = '\0'; return (dname); }