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authorEthan Yonker <dees_troy@teamw.in>2014-11-25 22:00:52 +0100
committerDees Troy <dees_troy@teamw.in>2014-12-04 17:30:16 +0100
commit253368a0726120efa57664cdd1d088af099a3d81 (patch)
tree56cf3b08cdf70d016a2411fba977f7cd143bc265 /crypto/logwrapper/logwrap.c
parentbootable recovery: we upgraded to 5.0.1 (diff)
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Diffstat (limited to 'crypto/logwrapper/logwrap.c')
-rw-r--r--crypto/logwrapper/logwrap.c569
1 files changed, 0 insertions, 569 deletions
diff --git a/crypto/logwrapper/logwrap.c b/crypto/logwrapper/logwrap.c
deleted file mode 100644
index 4ca1db4c8..000000000
--- a/crypto/logwrapper/logwrap.c
+++ /dev/null
@@ -1,569 +0,0 @@
-/*
- * Copyright (C) 2008 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 <string.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <poll.h>
-#include <sys/wait.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <libgen.h>
-#include <stdbool.h>
-#include <pthread.h>
-
-#include <logwrap/logwrap.h>
-#include "private/android_filesystem_config.h"
-#include "cutils/log.h"
-#include <cutils/klog.h>
-
-#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
-#define MIN(a,b) (((a)<(b))?(a):(b))
-
-static pthread_mutex_t fd_mutex = PTHREAD_MUTEX_INITIALIZER;
-
-#define ERROR(fmt, args...) \
-do { \
- fprintf(stderr, fmt, ## args); \
- ALOG(LOG_ERROR, "logwrapper", fmt, ## args); \
-} while(0)
-
-#define FATAL_CHILD(fmt, args...) \
-do { \
- ERROR(fmt, ## args); \
- _exit(-1); \
-} while(0)
-
-#define MAX_KLOG_TAG 16
-
-/* This is a simple buffer that holds up to the first beginning_buf->buf_size
- * bytes of output from a command.
- */
-#define BEGINNING_BUF_SIZE 0x1000
-struct beginning_buf {
- char *buf;
- size_t alloc_len;
- /* buf_size is the usable space, which is one less than the allocated size */
- size_t buf_size;
- size_t used_len;
-};
-
-/* This is a circular buf that holds up to the last ending_buf->buf_size bytes
- * of output from a command after the first beginning_buf->buf_size bytes
- * (which are held in beginning_buf above).
- */
-#define ENDING_BUF_SIZE 0x1000
-struct ending_buf {
- char *buf;
- ssize_t alloc_len;
- /* buf_size is the usable space, which is one less than the allocated size */
- ssize_t buf_size;
- ssize_t used_len;
- /* read and write offsets into the circular buffer */
- int read;
- int write;
-};
-
- /* A structure to hold all the abbreviated buf data */
-struct abbr_buf {
- struct beginning_buf b_buf;
- struct ending_buf e_buf;
- int beginning_buf_full;
-};
-
-/* Collect all the various bits of info needed for logging in one place. */
-struct log_info {
- int log_target;
- char klog_fmt[MAX_KLOG_TAG * 2];
- char *btag;
- bool abbreviated;
- FILE *fp;
- struct abbr_buf a_buf;
-};
-
-/* Forware declaration */
-static void add_line_to_abbr_buf(struct abbr_buf *a_buf, char *linebuf, int linelen);
-
-/* Return 0 on success, and 1 when full */
-static int add_line_to_linear_buf(struct beginning_buf *b_buf,
- char *line, ssize_t line_len)
-{
- size_t new_len;
- char *new_buf;
- int full = 0;
-
- if ((line_len + b_buf->used_len) > b_buf->buf_size) {
- full = 1;
- } else {
- /* Add to the end of the buf */
- memcpy(b_buf->buf + b_buf->used_len, line, line_len);
- b_buf->used_len += line_len;
- }
-
- return full;
-}
-
-static void add_line_to_circular_buf(struct ending_buf *e_buf,
- char *line, ssize_t line_len)
-{
- ssize_t free_len;
- ssize_t needed_space;
- char *new_buf;
- int cnt;
-
- if (e_buf->buf == NULL) {
- return;
- }
-
- if (line_len > e_buf->buf_size) {
- return;
- }
-
- free_len = e_buf->buf_size - e_buf->used_len;
-
- if (line_len > free_len) {
- /* remove oldest entries at read, and move read to make
- * room for the new string */
- needed_space = line_len - free_len;
- e_buf->read = (e_buf->read + needed_space) % e_buf->buf_size;
- e_buf->used_len -= needed_space;
- }
-
- /* Copy the line into the circular buffer, dealing with possible
- * wraparound.
- */
- cnt = MIN(line_len, e_buf->buf_size - e_buf->write);
- memcpy(e_buf->buf + e_buf->write, line, cnt);
- if (cnt < line_len) {
- memcpy(e_buf->buf, line + cnt, line_len - cnt);
- }
- e_buf->used_len += line_len;
- e_buf->write = (e_buf->write + line_len) % e_buf->buf_size;
-}
-
-/* Log directly to the specified log */
-static void do_log_line(struct log_info *log_info, char *line) {
- if (log_info->log_target & LOG_KLOG) {
- klog_write(6, log_info->klog_fmt, line);
- }
- if (log_info->log_target & LOG_ALOG) {
- ALOG(LOG_INFO, log_info->btag, "%s", line);
- }
- if (log_info->log_target & LOG_FILE) {
- fprintf(log_info->fp, "%s\n", line);
- }
-}
-
-/* Log to either the abbreviated buf, or directly to the specified log
- * via do_log_line() above.
- */
-static void log_line(struct log_info *log_info, char *line, int len) {
- if (log_info->abbreviated) {
- add_line_to_abbr_buf(&log_info->a_buf, line, len);
- } else {
- do_log_line(log_info, line);
- }
-}
-
-/*
- * The kernel will take a maximum of 1024 bytes in any single write to
- * the kernel logging device file, so find and print each line one at
- * a time. The allocated size for buf should be at least 1 byte larger
- * than buf_size (the usable size of the buffer) to make sure there is
- * room to temporarily stuff a null byte to terminate a line for logging.
- */
-static void print_buf_lines(struct log_info *log_info, char *buf, int buf_size)
-{
- char *line_start;
- char c;
- int line_len;
- int i;
-
- line_start = buf;
- for (i = 0; i < buf_size; i++) {
- if (*(buf + i) == '\n') {
- /* Found a line ending, print the line and compute new line_start */
- /* Save the next char and replace with \0 */
- c = *(buf + i + 1);
- *(buf + i + 1) = '\0';
- do_log_line(log_info, line_start);
- /* Restore the saved char */
- *(buf + i + 1) = c;
- line_start = buf + i + 1;
- } else if (*(buf + i) == '\0') {
- /* The end of the buffer, print the last bit */
- do_log_line(log_info, line_start);
- break;
- }
- }
- /* If the buffer was completely full, and didn't end with a newline, just
- * ignore the partial last line.
- */
-}
-
-static void init_abbr_buf(struct abbr_buf *a_buf) {
- char *new_buf;
-
- memset(a_buf, 0, sizeof(struct abbr_buf));
- new_buf = malloc(BEGINNING_BUF_SIZE);
- if (new_buf) {
- a_buf->b_buf.buf = new_buf;
- a_buf->b_buf.alloc_len = BEGINNING_BUF_SIZE;
- a_buf->b_buf.buf_size = BEGINNING_BUF_SIZE - 1;
- }
- new_buf = malloc(ENDING_BUF_SIZE);
- if (new_buf) {
- a_buf->e_buf.buf = new_buf;
- a_buf->e_buf.alloc_len = ENDING_BUF_SIZE;
- a_buf->e_buf.buf_size = ENDING_BUF_SIZE - 1;
- }
-}
-
-static void free_abbr_buf(struct abbr_buf *a_buf) {
- free(a_buf->b_buf.buf);
- free(a_buf->e_buf.buf);
-}
-
-static void add_line_to_abbr_buf(struct abbr_buf *a_buf, char *linebuf, int linelen) {
- if (!a_buf->beginning_buf_full) {
- a_buf->beginning_buf_full =
- add_line_to_linear_buf(&a_buf->b_buf, linebuf, linelen);
- }
- if (a_buf->beginning_buf_full) {
- add_line_to_circular_buf(&a_buf->e_buf, linebuf, linelen);
- }
-}
-
-static void print_abbr_buf(struct log_info *log_info) {
- struct abbr_buf *a_buf = &log_info->a_buf;
-
- /* Add the abbreviated output to the kernel log */
- if (a_buf->b_buf.alloc_len) {
- print_buf_lines(log_info, a_buf->b_buf.buf, a_buf->b_buf.used_len);
- }
-
- /* Print an ellipsis to indicate that the buffer has wrapped or
- * is full, and some data was not logged.
- */
- if (a_buf->e_buf.used_len == a_buf->e_buf.buf_size) {
- do_log_line(log_info, "...\n");
- }
-
- if (a_buf->e_buf.used_len == 0) {
- return;
- }
-
- /* Simplest way to print the circular buffer is allocate a second buf
- * of the same size, and memcpy it so it's a simple linear buffer,
- * and then cal print_buf_lines on it */
- if (a_buf->e_buf.read < a_buf->e_buf.write) {
- /* no wrap around, just print it */
- print_buf_lines(log_info, a_buf->e_buf.buf + a_buf->e_buf.read,
- a_buf->e_buf.used_len);
- } else {
- /* The circular buffer will always have at least 1 byte unused,
- * so by allocating alloc_len here we will have at least
- * 1 byte of space available as required by print_buf_lines().
- */
- char * nbuf = malloc(a_buf->e_buf.alloc_len);
- if (!nbuf) {
- return;
- }
- int first_chunk_len = a_buf->e_buf.buf_size - a_buf->e_buf.read;
- memcpy(nbuf, a_buf->e_buf.buf + a_buf->e_buf.read, first_chunk_len);
- /* copy second chunk */
- memcpy(nbuf + first_chunk_len, a_buf->e_buf.buf, a_buf->e_buf.write);
- print_buf_lines(log_info, nbuf, first_chunk_len + a_buf->e_buf.write);
- free(nbuf);
- }
-}
-
-static int parent(const char *tag, int parent_read, pid_t pid,
- int *chld_sts, int log_target, bool abbreviated, char *file_path) {
- int status = 0;
- char buffer[4096];
- struct pollfd poll_fds[] = {
- [0] = {
- .fd = parent_read,
- .events = POLLIN,
- },
- };
- int rc = 0;
- int fd;
-
- struct log_info log_info;
-
- int a = 0; // start index of unprocessed data
- int b = 0; // end index of unprocessed data
- int sz;
- bool found_child = false;
- char tmpbuf[256];
-
- log_info.btag = basename(tag);
- if (!log_info.btag) {
- log_info.btag = (char*) tag;
- }
-
- if (abbreviated && (log_target == LOG_NONE)) {
- abbreviated = 0;
- }
- if (abbreviated) {
- init_abbr_buf(&log_info.a_buf);
- }
-
- if (log_target & LOG_KLOG) {
- snprintf(log_info.klog_fmt, sizeof(log_info.klog_fmt),
- "<6>%.*s: %%s", MAX_KLOG_TAG, log_info.btag);
- }
-
- if ((log_target & LOG_FILE) && !file_path) {
- /* No file_path specified, clear the LOG_FILE bit */
- log_target &= ~LOG_FILE;
- }
-
- if (log_target & LOG_FILE) {
- fd = open(file_path, O_WRONLY | O_CREAT, 0664);
- if (fd < 0) {
- ERROR("Cannot log to file %s\n", file_path);
- log_target &= ~LOG_FILE;
- } else {
- lseek(fd, 0, SEEK_END);
- log_info.fp = fdopen(fd, "a");
- }
- }
-
- log_info.log_target = log_target;
- log_info.abbreviated = abbreviated;
-
- while (!found_child) {
- if (TEMP_FAILURE_RETRY(poll(poll_fds, ARRAY_SIZE(poll_fds), -1)) < 0) {
- ERROR("poll failed\n");
- rc = -1;
- goto err_poll;
- }
-
- if (poll_fds[0].revents & POLLIN) {
- sz = read(parent_read, &buffer[b], sizeof(buffer) - 1 - b);
-
- sz += b;
- // Log one line at a time
- for (b = 0; b < sz; b++) {
- if (buffer[b] == '\r') {
- if (abbreviated) {
- /* The abbreviated logging code uses newline as
- * the line separator. Lucikly, the pty layer
- * helpfully cooks the output of the command
- * being run and inserts a CR before NL. So
- * I just change it to NL here when doing
- * abbreviated logging.
- */
- buffer[b] = '\n';
- } else {
- buffer[b] = '\0';
- }
- } else if (buffer[b] == '\n') {
- buffer[b] = '\0';
- log_line(&log_info, &buffer[a], b - a);
- a = b + 1;
- }
- }
-
- if (a == 0 && b == sizeof(buffer) - 1) {
- // buffer is full, flush
- buffer[b] = '\0';
- log_line(&log_info, &buffer[a], b - a);
- b = 0;
- } else if (a != b) {
- // Keep left-overs
- b -= a;
- memmove(buffer, &buffer[a], b);
- a = 0;
- } else {
- a = 0;
- b = 0;
- }
- }
-
- if (poll_fds[0].revents & POLLHUP) {
- int ret;
-
- ret = waitpid(pid, &status, WNOHANG);
- if (ret < 0) {
- rc = errno;
- ALOG(LOG_ERROR, "logwrap", "waitpid failed with %s\n", strerror(errno));
- goto err_waitpid;
- }
- if (ret > 0) {
- found_child = true;
- }
- }
- }
-
- if (chld_sts != NULL) {
- *chld_sts = status;
- } else {
- if (WIFEXITED(status))
- rc = WEXITSTATUS(status);
- else
- rc = -ECHILD;
- }
-
- // Flush remaining data
- if (a != b) {
- buffer[b] = '\0';
- log_line(&log_info, &buffer[a], b - a);
- }
-
- /* All the output has been processed, time to dump the abbreviated output */
- if (abbreviated) {
- print_abbr_buf(&log_info);
- }
-
- if (WIFEXITED(status)) {
- if (WEXITSTATUS(status)) {
- snprintf(tmpbuf, sizeof(tmpbuf),
- "%s terminated by exit(%d)\n", log_info.btag, WEXITSTATUS(status));
- do_log_line(&log_info, tmpbuf);
- }
- } else {
- if (WIFSIGNALED(status)) {
- snprintf(tmpbuf, sizeof(tmpbuf),
- "%s terminated by signal %d\n", log_info.btag, WTERMSIG(status));
- do_log_line(&log_info, tmpbuf);
- } else if (WIFSTOPPED(status)) {
- snprintf(tmpbuf, sizeof(tmpbuf),
- "%s stopped by signal %d\n", log_info.btag, WSTOPSIG(status));
- do_log_line(&log_info, tmpbuf);
- }
- }
-
-err_waitpid:
-err_poll:
- if (log_target & LOG_FILE) {
- fclose(log_info.fp); /* Also closes underlying fd */
- }
- if (abbreviated) {
- free_abbr_buf(&log_info.a_buf);
- }
- return rc;
-}
-
-static void child(int argc, char* argv[]) {
- // create null terminated argv_child array
- char* argv_child[argc + 1];
- memcpy(argv_child, argv, argc * sizeof(char *));
- argv_child[argc] = NULL;
-
- if (execvp(argv_child[0], argv_child)) {
- FATAL_CHILD("executing %s failed: %s\n", argv_child[0],
- strerror(errno));
- }
-}
-
-int android_fork_execvp_ext(int argc, char* argv[], int *status, bool ignore_int_quit,
- int log_target, bool abbreviated, char *file_path) {
- pid_t pid;
- int parent_ptty;
- int child_ptty;
- char *child_devname = NULL;
- struct sigaction intact;
- struct sigaction quitact;
- sigset_t blockset;
- sigset_t oldset;
- int rc = 0;
-
- rc = pthread_mutex_lock(&fd_mutex);
- if (rc) {
- ERROR("failed to lock signal_fd mutex\n");
- goto err_lock;
- }
-
- /* Use ptty instead of socketpair so that STDOUT is not buffered */
- parent_ptty = open("/dev/ptmx", O_RDWR);
- if (parent_ptty < 0) {
- ERROR("Cannot create parent ptty\n");
- rc = -1;
- goto err_open;
- }
-
- if (grantpt(parent_ptty) || unlockpt(parent_ptty) ||
- ((child_devname = (char*)ptsname(parent_ptty)) == 0)) {
- ERROR("Problem with /dev/ptmx\n");
- rc = -1;
- goto err_ptty;
- }
-
- child_ptty = open(child_devname, O_RDWR);
- if (child_ptty < 0) {
- ERROR("Cannot open child_ptty\n");
- rc = -1;
- goto err_child_ptty;
- }
-
- sigemptyset(&blockset);
- sigaddset(&blockset, SIGINT);
- sigaddset(&blockset, SIGQUIT);
- pthread_sigmask(SIG_BLOCK, &blockset, &oldset);
-
- pid = fork();
- if (pid < 0) {
- close(child_ptty);
- ERROR("Failed to fork\n");
- rc = -1;
- goto err_fork;
- } else if (pid == 0) {
- pthread_mutex_unlock(&fd_mutex);
- pthread_sigmask(SIG_SETMASK, &oldset, NULL);
- close(parent_ptty);
-
- // redirect stdout and stderr
- dup2(child_ptty, 1);
- dup2(child_ptty, 2);
- close(child_ptty);
-
- child(argc, argv);
- } else {
- close(child_ptty);
- if (ignore_int_quit) {
- struct sigaction ignact;
-
- memset(&ignact, 0, sizeof(ignact));
- ignact.sa_handler = SIG_IGN;
- sigaction(SIGINT, &ignact, &intact);
- sigaction(SIGQUIT, &ignact, &quitact);
- }
-
- rc = parent(argv[0], parent_ptty, pid, status, log_target,
- abbreviated, file_path);
- }
-
- if (ignore_int_quit) {
- sigaction(SIGINT, &intact, NULL);
- sigaction(SIGQUIT, &quitact, NULL);
- }
-err_fork:
- pthread_sigmask(SIG_SETMASK, &oldset, NULL);
-err_child_ptty:
-err_ptty:
- close(parent_ptty);
-err_open:
- pthread_mutex_unlock(&fd_mutex);
-err_lock:
- return rc;
-}