HardenedBSD/lib/libutil/getlocalbase.c
Warner Losh a2f733abcf lib: Automated cleanup of cdefs and other formatting
Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by:		Netflix
2023-11-26 22:23:59 -07:00

88 lines
2.6 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright 2020 Stefan Eßer <se@freebsd.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/limits.h>
#include <errno.h>
#include <stdlib.h>
#include <paths.h>
#include <libutil.h>
#include <unistd.h>
#ifndef LOCALBASE_PATH
#define LOCALBASE_PATH _PATH_LOCALBASE
#endif
#ifndef LOCALBASE_CTL_LEN
#define LOCALBASE_CTL_LEN MAXPATHLEN
#endif
/* Any prefix guaranteed to not be the start of a valid path name */
#define ILLEGAL_PREFIX "/dev/null/"
const char *
getlocalbase(void)
{
#if LOCALBASE_CTL_LEN > 0
int localbase_oid[2] = {CTL_USER, USER_LOCALBASE};
static char localpath[LOCALBASE_CTL_LEN];
size_t localpathlen = LOCALBASE_CTL_LEN;
#endif
char *tmppath;
static const char *localbase = NULL;
if (localbase != NULL)
return (localbase);
if (issetugid() == 0) {
tmppath = getenv("LOCALBASE");
if (tmppath != NULL && tmppath[0] != '\0') {
localbase = tmppath;
return (localbase);
}
}
#if LOCALBASE_CTL_LEN > 0
if (sysctl(localbase_oid, 2, localpath, &localpathlen, NULL, 0) != 0) {
if (errno != ENOMEM)
localbase = LOCALBASE_PATH;
else
localbase = ILLEGAL_PREFIX;
} else {
if (localpath[0] != '\0')
localbase = localpath;
else
localbase = LOCALBASE_PATH;
}
#else
localbase = LOCALBASE_PATH;
#endif
return (localbase);
}