95 lines
3.2 KiB
C
95 lines
3.2 KiB
C
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/*
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* Copyright (C) 2005-2017 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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#ifndef _LIBS_LOGCAT_H /* header boilerplate */
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#define _LIBS_LOGCAT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE
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#ifndef __ANDROID_API__
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#define __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE 1
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#elif __ANDROID_API__ > 24 /* > Nougat */
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#define __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE 1
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#else
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#define __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE 0
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#endif
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#endif
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#if __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE
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/* For managing an in-process logcat function, rather than forking/execing
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*
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* It also serves as the basis for the logcat command.
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*
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* The following C API allows a logcat instance to be created, run
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* to completion, and then release all the associated resources.
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*/
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/*
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* The opaque context
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*/
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#ifndef __android_logcat_context_defined /* typedef boilerplate */
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#define __android_logcat_context_defined
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typedef struct android_logcat_context_internal* android_logcat_context;
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#endif
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/* Creates a context associated with this logcat instance
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*
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* Returns a pointer to the context, or a NULL on error.
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*/
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android_logcat_context create_android_logcat();
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/* Collects and outputs the logcat data to output and error file descriptors
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*
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* Will block, performed in-thread and in-process
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*
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* The output file descriptor variable, if greater than or equal to 0, is
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* where the output (ie: stdout) will be sent. The file descriptor is closed
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* on android_logcat_destroy which terminates the instance, or when an -f flag
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* (output redirect to a file) is present in the command. The error file
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* descriptor variable, if greater than or equal to 0, is where the error
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* stream (ie: stderr) will be sent, also closed on android_logcat_destroy.
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* The error file descriptor can be set to equal to the output file descriptor,
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* which will mix output and error stream content, and will defer closure of
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* the file descriptor on -f flag redirection. Negative values for the file
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* descriptors will use stdout and stderr FILE references respectively
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* internally, and will not close the references as noted above.
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*
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* Return value is 0 for success, non-zero for errors.
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*/
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int android_logcat_run_command(android_logcat_context ctx, int output, int error,
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int argc, char* const* argv, char* const* envp);
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/* Finished with context
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*
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* Free up all associated resources.
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*
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* Return value is the result of the android_logcat_run_command, or
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* non-zero for any errors.
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*/
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int android_logcat_destroy(android_logcat_context* ctx);
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#endif /* __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _LIBS_LOGCAT_H */
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