diff options
Diffstat (limited to 'crypto/logwrapper/include')
| -rw-r--r-- | crypto/logwrapper/include/logwrap/logwrap.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/crypto/logwrapper/include/logwrap/logwrap.h b/crypto/logwrapper/include/logwrap/logwrap.h new file mode 100644 index 000000000..4307a3055 --- /dev/null +++ b/crypto/logwrapper/include/logwrap/logwrap.h @@ -0,0 +1,87 @@ +/* system/core/include/logwrap/logwrap.h + * + * Copyright 2013, The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef __LIBS_LOGWRAP_H +#define __LIBS_LOGWRAP_H + +#include <stdbool.h> + +__BEGIN_DECLS + +/* + * Run a command while logging its stdout and stderr + * + * WARNING: while this function is running it will clear all SIGCHLD handlers + * if you rely on SIGCHLD in the caller there is a chance zombies will be + * created if you're not calling waitpid after calling this. This function will + * log a warning when it clears SIGCHLD for processes other than the child it + * created. + * + * Arguments: + * argc: the number of elements in argv + * argv: an array of strings containing the command to be executed and its + * arguments as separate strings. argv does not need to be + * NULL-terminated + * status: the equivalent child status as populated by wait(status). This + * value is only valid when logwrap successfully completes. If NULL + * the return value of the child will be the function's return value. + * ignore_int_quit: set to true if you want to completely ignore SIGINT and + * SIGQUIT while logwrap is running. This may force the end-user to + * send a signal twice to signal the caller (once for the child, and + * once for the caller) + * log_target: Specify where to log the output of the child, either LOG_NONE, + * LOG_ALOG (for the Android system log), LOG_KLOG (for the kernel + * log), or LOG_FILE (and you need to specify a pathname in the + * file_path argument, otherwise pass NULL). These are bit fields, + * and can be OR'ed together to log to multiple places. + * abbreviated: If true, capture up to the first 100 lines and last 4K of + * output from the child. The abbreviated output is not dumped to + * the specified log until the child has exited. + * file_path: if log_target has the LOG_FILE bit set, then this parameter + * must be set to the pathname of the file to log to. + * + * Return value: + * 0 when logwrap successfully run the child process and captured its status + * -1 when an internal error occurred + * -ECHILD if status is NULL and the child didn't exit properly + * the return value of the child if it exited properly and status is NULL + * + */ + +/* Values for the log_target parameter android_fork_execvp_ext() */ +#define LOG_NONE 0 +#define LOG_ALOG 1 +#define LOG_KLOG 2 +#define LOG_FILE 4 + +int android_fork_execvp_ext(int argc, char* argv[], int *status, bool ignore_int_quit, + int log_target, bool abbreviated, char *file_path); + +/* Similar to above, except abbreviated logging is not available, and if logwrap + * is true, logging is to the Android system log, and if false, there is no + * logging. + */ +static inline int android_fork_execvp(int argc, char* argv[], int *status, + bool ignore_int_quit, bool logwrap) +{ + return android_fork_execvp_ext(argc, argv, status, ignore_int_quit, + (logwrap ? LOG_ALOG : LOG_NONE), false, NULL); +} + +__END_DECLS + +#endif /* __LIBS_LOGWRAP_H */ |