diff options
Diffstat (limited to 'libc/bionic/logd_write.c')
| -rw-r--r-- | libc/bionic/logd_write.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/libc/bionic/logd_write.c b/libc/bionic/logd_write.c new file mode 100644 index 0000000..6de646d --- /dev/null +++ b/libc/bionic/logd_write.c @@ -0,0 +1,166 @@ +/* + * Copyright (C) 2008 The Android Open Source Project + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ +#include <time.h> +#include <stdio.h> +#include <pthread.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/uio.h> +#include <arpa/inet.h> +#include <errno.h> +#include <string.h> +#include <stdlib.h> +#include <stdarg.h> +#include <fcntl.h> + +#include <utils/logger.h> +#include "logd.h" + +#include <pthread.h> + +#define LOG_BUF_SIZE 1024 + +typedef enum { + LOG_ID_MAIN = 0, + LOG_ID_RADIO, + LOG_ID_MAX +} log_id_t; + +static int __write_to_log_init(log_id_t, struct iovec *vec); +static int (*write_to_log)(log_id_t, struct iovec *vec) = __write_to_log_init; +static pthread_mutex_t log_init_lock = PTHREAD_MUTEX_INITIALIZER; + +static int log_fds[(int)LOG_ID_MAX] = { -1, -1 }; + +static int __write_to_log_null(log_id_t log_fd, struct iovec *vec) +{ + return -1; +} + +static int __write_to_log_kernel(log_id_t log_id, struct iovec *vec) +{ + 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 = writev(log_fd, vec, 3); + } while (ret < 0 && errno == EINTR); + + return ret; +} + +static int __write_to_log_init(log_id_t log_id, struct iovec *vec) +{ + pthread_mutex_lock(&log_init_lock); + + if (write_to_log == __write_to_log_init) { + log_fds[LOG_ID_MAIN] = open("/dev/"LOGGER_LOG_MAIN, O_WRONLY); + log_fds[LOG_ID_RADIO] = open("/dev/"LOGGER_LOG_RADIO, O_WRONLY); + + write_to_log = __write_to_log_kernel; + + if (log_fds[LOG_ID_MAIN] < 0 || log_fds[LOG_ID_RADIO] < 0) { + close(log_fds[LOG_ID_MAIN]); + close(log_fds[LOG_ID_RADIO]); + log_fds[LOG_ID_MAIN] = -1; + log_fds[LOG_ID_RADIO] = -1; + write_to_log = __write_to_log_null; + } + } + + pthread_mutex_unlock(&log_init_lock); + + return write_to_log(log_id, vec); +} + +static 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 = ""; + + if (!strcmp(tag, "HTC_RIL")) + 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); +} + + +static 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 __libc_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); +} + +int __libc_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); + + exit(1); + + return -1; +} |