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/*
* Copyright © 2019 Red Hat, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <config.h>
#pragma once
#include <unistd.h>
#include "util-strings.h"
/**
* Try to figure out the directory we're executing from and if it matches
* the builddir, return that directory. Otherwise, return NULL.
*/
static inline char *
builddir_lookup(void)
{
char execdir[PATH_MAX] = {0};
char *pathsep;
ssize_t nread;
/* In the case of release builds, the builddir is
the empty string */
if (streq(MESON_BUILD_ROOT, ""))
return NULL;
nread = readlink("/proc/self/exe", execdir, sizeof(execdir) - 1);
if (nread <= 0 || nread == sizeof(execdir) - 1)
return NULL;
/* readlink doesn't terminate the string and readlink says
anything past sz is undefined */
execdir[++nread] = '\0';
pathsep = strrchr(execdir, '/');
if (!pathsep)
return NULL;
*pathsep = '\0';
if (!streq(execdir, MESON_BUILD_ROOT))
return NULL;
return safe_strdup(execdir);
}
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