diff options
Diffstat (limited to 'liblog/logd_write.c')
| -rw-r--r-- | liblog/logd_write.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/liblog/logd_write.c b/liblog/logd_write.c new file mode 100644 index 0000000..d5d8138 --- /dev/null +++ b/liblog/logd_write.c @@ -0,0 +1,229 @@ +/* + * Copyright (C) 2007 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. + */ +#include <time.h> +#include <stdio.h> +#ifdef HAVE_PTHREADS +#include <pthread.h> +#endif +#include <unistd.h> +#include <errno.h> +#include <fcntl.h> +#include <string.h> +#include <stdlib.h> +#include <stdarg.h> + +#include <utils/logger.h> +#include <cutils/logd.h> + +#define LOG_BUF_SIZE 1024 + +#if FAKE_LOG_DEVICE +// This will be defined when building for the host. +#define log_open(pathname, flags) fakeLogOpen(pathname, flags) +#define log_writev(filedes, vector, count) fakeLogWritev(filedes, vector, count) +#define log_close(filedes) fakeLogClose(filedes) +#else +#define log_open(pathname, flags) open(pathname, flags) +#define log_writev(filedes, vector, count) writev(filedes, vector, count) +#define log_close(filedes) close(filedes) +#endif + +typedef enum { + LOG_ID_MAIN = 0, + LOG_ID_RADIO, + LOG_ID_EVENTS, + LOG_ID_MAX +} log_id_t; + +static int __write_to_log_init(log_id_t, struct iovec *vec, size_t nr); +static int (*write_to_log)(log_id_t, struct iovec *vec, size_t nr) = + __write_to_log_init; +#ifdef HAVE_PTHREADS +static pthread_mutex_t log_init_lock = PTHREAD_MUTEX_INITIALIZER; +#endif + +static int log_fds[(int)LOG_ID_MAX] = { -1, -1, -1 }; + +/* + * This is used by the C++ code to decide if it should write logs through + * the C code. Basically, if /dev/log/... is available, we're running in + * the simulator rather than a desktop tool and want to use the device. + */ +static enum { + kLogUninitialized, kLogNotAvailable, kLogAvailable +} g_log_status = kLogUninitialized; +int __android_log_dev_available(void) +{ + if (g_log_status == kLogUninitialized) { + if (access("/dev/"LOGGER_LOG_MAIN, W_OK) == 0) + g_log_status = kLogAvailable; + else + g_log_status = kLogNotAvailable; + } + + return (g_log_status == kLogAvailable); +} + +static int __write_to_log_null(log_id_t log_fd, struct iovec *vec, size_t nr) +{ + return -1; +} + +static int __write_to_log_kernel(log_id_t log_id, struct iovec *vec, size_t nr) +{ + ssize_t ret; + int log_fd; + + if (/*(int)log_id >= 0 &&*/ (int)log_id < (int)LOG_ID_MAX) { + log_fd = log_fds[(int)log_id]; + } else { + return EBADF; + } + + do { + ret = log_writev(log_fd, vec, nr); + } while (ret < 0 && errno == EINTR); + + return ret; +} + +static int __write_to_log_init(log_id_t log_id, struct iovec *vec, size_t nr) +{ +#ifdef HAVE_PTHREADS + pthread_mutex_lock(&log_init_lock); +#endif + + if (write_to_log == __write_to_log_init) { + log_fds[LOG_ID_MAIN] = log_open("/dev/"LOGGER_LOG_MAIN, O_WRONLY); + log_fds[LOG_ID_RADIO] = log_open("/dev/"LOGGER_LOG_RADIO, O_WRONLY); + log_fds[LOG_ID_EVENTS] = log_open("/dev/"LOGGER_LOG_EVENTS, O_WRONLY); + + write_to_log = __write_to_log_kernel; + + if (log_fds[LOG_ID_MAIN] < 0 || log_fds[LOG_ID_RADIO] < 0 || + log_fds[LOG_ID_EVENTS] < 0) { + log_close(log_fds[LOG_ID_MAIN]); + log_close(log_fds[LOG_ID_RADIO]); + log_close(log_fds[LOG_ID_EVENTS]); + log_fds[LOG_ID_MAIN] = -1; + log_fds[LOG_ID_RADIO] = -1; + log_fds[LOG_ID_EVENTS] = -1; + write_to_log = __write_to_log_null; + } + } + +#ifdef HAVE_PTHREADS + pthread_mutex_unlock(&log_init_lock); +#endif + + return write_to_log(log_id, vec, nr); +} + +int __android_log_write(int prio, const char *tag, const char *msg) +{ + struct iovec vec[3]; + log_id_t log_id = LOG_ID_MAIN; + + if (!tag) + tag = ""; + + /* XXX: This needs to go! */ + if (!strcmp(tag, "HTC_RIL") || + !strcmp(tag, "RILJ") || + !strcmp(tag, "RILC") || + !strcmp(tag, "RIL") || + !strcmp(tag, "AT") || + !strcmp(tag, "GSM") || + !strcmp(tag, "STK")) + log_id = LOG_ID_RADIO; + + vec[0].iov_base = (unsigned char *) &prio; + vec[0].iov_len = 1; + vec[1].iov_base = (void *) tag; + vec[1].iov_len = strlen(tag) + 1; + vec[2].iov_base = (void *) msg; + vec[2].iov_len = strlen(msg) + 1; + + return write_to_log(log_id, vec, 3); +} + +int __android_log_vprint(int prio, const char *tag, const char *fmt, va_list ap) +{ + char buf[LOG_BUF_SIZE]; + + vsnprintf(buf, LOG_BUF_SIZE, fmt, ap); + + return __android_log_write(prio, tag, buf); +} + +int __android_log_print(int prio, const char *tag, const char *fmt, ...) +{ + va_list ap; + char buf[LOG_BUF_SIZE]; + + va_start(ap, fmt); + vsnprintf(buf, LOG_BUF_SIZE, fmt, ap); + va_end(ap); + + return __android_log_write(prio, tag, buf); +} + +void __android_log_assert(const char *cond, const char *tag, + const char *fmt, ...) +{ + va_list ap; + char buf[LOG_BUF_SIZE]; + + va_start(ap, fmt); + vsnprintf(buf, LOG_BUF_SIZE, fmt, ap); + va_end(ap); + + __android_log_write(ANDROID_LOG_FATAL, tag, buf); + + __builtin_trap(); /* trap so we have a chance to debug the situation */ +} + +int __android_log_bwrite(int32_t tag, const void *payload, size_t len) +{ + struct iovec vec[2]; + + vec[0].iov_base = &tag; + vec[0].iov_len = sizeof(tag); + vec[1].iov_base = (void*)payload; + vec[1].iov_len = len; + + return write_to_log(LOG_ID_EVENTS, vec, 2); +} + +/* + * Like __android_log_bwrite, but takes the type as well. Doesn't work + * for the general case where we're generating lists of stuff, but very + * handy if we just want to dump an integer into the log. + */ +int __android_log_btwrite(int32_t tag, char type, const void *payload, + size_t len) +{ + struct iovec vec[3]; + + vec[0].iov_base = &tag; + vec[0].iov_len = sizeof(tag); + vec[1].iov_base = &type; + vec[1].iov_len = sizeof(type); + vec[2].iov_base = (void*)payload; + vec[2].iov_len = len; + + return write_to_log(LOG_ID_EVENTS, vec, 3); +} |