ab2f79c0da
For treble enabled devices, still return the appropriate shell depending
on whether the process is a vendor process or a system one.
Test: Manual testing: on a bullhead device, ran test programs from
/vendor/bin which used popen() and system(). The calls succeeded.
Bug: 65054230
Bug: 64516799
Merged-In: I15dfdbb107cfca7c0f92f337c9bb46b9876eb38e
Change-Id: I15dfdbb107cfca7c0f92f337c9bb46b9876eb38e
(cherry picked from commit 1e52871773)
57 lines
2.3 KiB
C++
57 lines
2.3 KiB
C++
/*
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* Copyright (C) 2017 The Android Open Source Project
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* All rights reserved.
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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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* * 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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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <errno.h>
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#include <string.h>
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#include <sys/cdefs.h>
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#include <unistd.h>
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#define VENDOR_PREFIX "/vendor/"
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static const char* init_sh_path() {
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/* If the device is not treble enabled, return the path to the system shell.
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* Vendor code, on non-treble enabled devices could use system() / popen()
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* with relative paths for executables on /system. Since /system will not be
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* in $PATH for the vendor shell, simply return the system shell.
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*/
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#ifdef __ANDROID_TREBLE__
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/* look for /system or /vendor prefix */
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char exe_path[strlen(VENDOR_PREFIX)];
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ssize_t len = readlink("/proc/self/exe", exe_path, sizeof(exe_path));
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if (len != -1 && !strncmp(exe_path, VENDOR_PREFIX, strlen(VENDOR_PREFIX))) {
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return "/vendor/bin/sh";
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}
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#endif
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return "/system/bin/sh";
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}
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__LIBC_HIDDEN__ extern "C" const char* __bionic_get_shell_path() {
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static const char* sh_path = init_sh_path();
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return sh_path;
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}
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