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/*
* Copyright 2010-2016, Tarantool AUTHORS, please see AUTHORS file.
*
* 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 AUTHORS ``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
* <COPYRIGHT HOLDER> 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 <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <stdint.h>
#include <stdbool.h>
#include <unistd.h>
#if defined(__APPLE__)
#include <mach-o/dyld.h>
#elif defined(__FreeBSD__)
#include <sys/sysctl.h>
#endif
const char *
find_path(const char *argv0)
{
static char path[PATH_MAX] = {'\0'};
static bool found = false;
if (found)
return path;
char buf[PATH_MAX];
size_t size = PATH_MAX - 1;
if (argv0[0] == '/')
snprintf(buf, size, "%s", argv0);
else {
int rc = -1;
#if defined(__linux__)
rc = readlink("/proc/self/exe", buf, size);
if (rc >= 0) {
/* readlink() does not add a trailing zero */
buf[rc] = '\0';
}
#elif defined(__FreeBSD__)
int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 };
rc = sysctl(mib, 4, buf, &size, NULL, 0);
#elif defined(__sun)
snprintf(buf, size, "%s", getexecname());
rc = 0;
#elif defined(__APPLE__)
uint32_t usize = size;
rc = _NSGetExecutablePath(buf, &usize);
#endif
if (rc == -1)
snprintf(buf, sizeof(buf) - 1, "%s", getenv("_"));
}
if (realpath(buf, path) == NULL)
snprintf(path, sizeof(path), "%s", buf);
found = true;
return path;
}
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