ff7d067ffa
Call the function now logwrap_fork_execvp() and fix const correctness issues, so no longer do callers need to const_cast<> their args. Test: logwrapper still works Change-Id: Iea34f5cae90a06a37d395bf9a91e01fb38c35fa6
82 lines
3.7 KiB
C
82 lines
3.7 KiB
C
/* system/core/include/logwrap/logwrap.h
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*
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* Copyright 2013, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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/*
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* Run a command while logging its stdout and stderr
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*
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* Arguments:
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* argc: the number of elements in argv
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* argv: an array of strings containing the command to be executed and its
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* arguments as separate strings. argv does not need to be
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* NULL-terminated
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* status: the equivalent child status as populated by wait(status). This
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* value is only valid when logwrap successfully completes. If NULL
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* the return value of the child will be the function's return value.
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* forward_signals: set to true if you want to forward SIGINT, SIGQUIT, and
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* SIGHUP to the child process, while it is running. You likely do
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* not need to use this; it is primarily for the logwrapper
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* executable itself.
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* log_target: Specify where to log the output of the child, either LOG_NONE,
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* LOG_ALOG (for the Android system log), LOG_KLOG (for the kernel
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* log), or LOG_FILE (and you need to specify a pathname in the
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* file_path argument, otherwise pass NULL). These are bit fields,
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* and can be OR'ed together to log to multiple places.
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* abbreviated: If true, capture up to the first 100 lines and last 4K of
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* output from the child. The abbreviated output is not dumped to
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* the specified log until the child has exited.
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* file_path: if log_target has the LOG_FILE bit set, then this parameter
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* must be set to the pathname of the file to log to.
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*
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* Return value:
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* 0 when logwrap successfully run the child process and captured its status
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* -1 when an internal error occurred
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* -ECHILD if status is NULL and the child didn't exit properly
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* the return value of the child if it exited properly and status is NULL
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*
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*/
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/* Values for the log_target parameter logwrap_fork_execvp() */
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#define LOG_NONE 0
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#define LOG_ALOG 1
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#define LOG_KLOG 2
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#define LOG_FILE 4
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int logwrap_fork_execvp(int argc, const char* const* argv, int* status, bool forward_signals,
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int log_target, bool abbreviated, const char* file_path);
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// TODO: Actually deprecate this and the below.
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static inline int android_fork_execvp_ext(int argc, char* argv[], int* status, bool ignore_int_quit,
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int log_target, bool abbreviated, const char* file_path,
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void* unused_opts, int unused_opts_len) {
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(void)ignore_int_quit;
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(void)unused_opts;
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(void)unused_opts_len;
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return logwrap_fork_execvp(argc, argv, status, false, log_target, abbreviated, file_path);
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}
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/* Similar to above, except abbreviated logging is not available, and if logwrap
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* is true, logging is to the Android system log, and if false, there is no
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* logging.
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*/
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static inline int android_fork_execvp(int argc, char* argv[], int* status, bool ignore_int_quit,
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bool logwrap) {
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(void)ignore_int_quit;
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return logwrap_fork_execvp(argc, argv, status, false, (logwrap ? LOG_ALOG : LOG_NONE), false,
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nullptr);
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}
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