logwrapper.c revision 8c4873319a77c54cc198a4e5f4429099ff9da4f7
149e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat/* 249e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat * Copyright (C) 2008 The Android Open Source Project 349e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat * 449e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat * Licensed under the Apache License, Version 2.0 (the "License"); 549e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat * you may not use this file except in compliance with the License. 649e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat * You may obtain a copy of the License at 749e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat * 849e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat * http://www.apache.org/licenses/LICENSE-2.0 949e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat * 1049e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat * Unless required by applicable law or agreed to in writing, software 1149e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat * distributed under the License is distributed on an "AS IS" BASIS, 1249e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1349e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat * See the License for the specific language governing permissions and 1449e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat * limitations under the License. 1549e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat */ 1649e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 1749e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat#include <string.h> 1849e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat#include <sys/types.h> 1949e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat#include <sys/wait.h> 2049e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat#include <stdio.h> 2149e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat#include <stdlib.h> 2249e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat#include <unistd.h> 2349e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat#include <errno.h> 2449e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat#include <fcntl.h> 2549e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 2649e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat#include "private/android_filesystem_config.h" 2749e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat#include "cutils/log.h" 2849e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 2949e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehatint parent(const char *tag, int parent_read) { 3049e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat int status; 3149e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat char buffer[4096]; 3249e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 3349e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat int a = 0; // start index of unprocessed data 3449e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat int b = 0; // end index of unprocessed data 3549e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat int sz; 3649e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat while ((sz = read(parent_read, &buffer[b], sizeof(buffer) - 1 - b)) > 0) { 3749e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 3849e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat sz += b; 3949e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat // Log one line at a time 4049e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat for (b = 0; b < sz; b++) { 4149e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat if (buffer[b] == '\r') { 4249e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat buffer[b] = '\0'; 4349e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } else if (buffer[b] == '\n') { 4449e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat buffer[b] = '\0'; 4549e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 468c4873319a77c54cc198a4e5f4429099ff9da4f7Steve Block ALOG(LOG_INFO, tag, "%s", &buffer[a]); 4749e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat a = b + 1; 4849e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } 4949e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } 5049e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 5149e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat if (a == 0 && b == sizeof(buffer) - 1) { 5249e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat // buffer is full, flush 5349e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat buffer[b] = '\0'; 548c4873319a77c54cc198a4e5f4429099ff9da4f7Steve Block ALOG(LOG_INFO, tag, "%s", &buffer[a]); 5549e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat b = 0; 5649e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } else if (a != b) { 5749e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat // Keep left-overs 5849e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat b -= a; 5949e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat memmove(buffer, &buffer[a], b); 6049e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat a = 0; 6149e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } else { 6249e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat a = 0; 6349e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat b = 0; 6449e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } 6549e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 6649e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } 6749e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat // Flush remaining data 6849e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat if (a != b) { 6949e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat buffer[b] = '\0'; 708c4873319a77c54cc198a4e5f4429099ff9da4f7Steve Block ALOG(LOG_INFO, tag, "%s", &buffer[a]); 7149e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } 7249e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat status = 0xAAAA; 7349e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat if (wait(&status) != -1) { // Wait for child 7449e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat if (WIFEXITED(status)) { 751b15d463d4816fc084767cbeda3ee69ff5527545Brad Fitzpatrick if (WEXITSTATUS(status) != 0) { 768c4873319a77c54cc198a4e5f4429099ff9da4f7Steve Block ALOG(LOG_INFO, "logwrapper", "%s terminated by exit(%d)", tag, 771b15d463d4816fc084767cbeda3ee69ff5527545Brad Fitzpatrick WEXITSTATUS(status)); 781b15d463d4816fc084767cbeda3ee69ff5527545Brad Fitzpatrick } 7949e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat return WEXITSTATUS(status); 8049e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } else if (WIFSIGNALED(status)) 818c4873319a77c54cc198a4e5f4429099ff9da4f7Steve Block ALOG(LOG_INFO, "logwrapper", "%s terminated by signal %d", tag, 8249e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat WTERMSIG(status)); 8349e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat else if (WIFSTOPPED(status)) 848c4873319a77c54cc198a4e5f4429099ff9da4f7Steve Block ALOG(LOG_INFO, "logwrapper", "%s stopped by signal %d", tag, 8549e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat WSTOPSIG(status)); 8649e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } else 878c4873319a77c54cc198a4e5f4429099ff9da4f7Steve Block ALOG(LOG_INFO, "logwrapper", "%s wait() failed: %s (%d)", tag, 8849e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat strerror(errno), errno); 8949e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat return -EAGAIN; 9049e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat} 9149e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 9249e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehatvoid child(int argc, const char**argv) { 9349e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat // create null terminated argv_child array 9449e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat char* argv_child[argc + 1]; 9549e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat memcpy(argv_child, argv, argc * sizeof(char *)); 9649e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat argv_child[argc] = NULL; 9749e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 9849e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat // XXX: PROTECT FROM VIKING KILLER 9949e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat if (execv(argv_child[0], argv_child)) { 1008c4873319a77c54cc198a4e5f4429099ff9da4f7Steve Block ALOG(LOG_ERROR, "logwrapper", 10149e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat "executing %s failed: %s", argv_child[0], strerror(errno)); 10249e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat exit(-1); 10349e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } 10449e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat} 10549e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 10649e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehatint logwrap(int argc, const char* argv[], int background) 10749e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat{ 10849e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat pid_t pid; 10949e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 11049e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat int parent_ptty; 11149e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat int child_ptty; 11249e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat char *child_devname = NULL; 11349e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 11449e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat /* Use ptty instead of socketpair so that STDOUT is not buffered */ 11549e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat parent_ptty = open("/dev/ptmx", O_RDWR); 11649e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat if (parent_ptty < 0) { 1178c4873319a77c54cc198a4e5f4429099ff9da4f7Steve Block ALOG(LOG_ERROR, "logwrapper", "Cannot create parent ptty"); 1188c4873319a77c54cc198a4e5f4429099ff9da4f7Steve Block return -errno; 11949e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } 12049e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 12149e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat if (grantpt(parent_ptty) || unlockpt(parent_ptty) || 12249e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat ((child_devname = (char*)ptsname(parent_ptty)) == 0)) { 1238c940ef7dbd423cadc92982b44a65ed1014389e2San Mehat close(parent_ptty); 1248c4873319a77c54cc198a4e5f4429099ff9da4f7Steve Block ALOG(LOG_ERROR, "logwrapper", "Problem with /dev/ptmx"); 1258c4873319a77c54cc198a4e5f4429099ff9da4f7Steve Block return -1; 12649e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } 12749e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 12849e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat pid = fork(); 12949e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat if (pid < 0) { 1301b15d463d4816fc084767cbeda3ee69ff5527545Brad Fitzpatrick close(parent_ptty); 1318c4873319a77c54cc198a4e5f4429099ff9da4f7Steve Block ALOG(LOG_ERROR, "logwrapper", "Failed to fork"); 13249e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat return -errno; 13349e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } else if (pid == 0) { 1348c940ef7dbd423cadc92982b44a65ed1014389e2San Mehat /* 1358c940ef7dbd423cadc92982b44a65ed1014389e2San Mehat * Child 1368c940ef7dbd423cadc92982b44a65ed1014389e2San Mehat */ 13749e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat child_ptty = open(child_devname, O_RDWR); 13849e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat if (child_ptty < 0) { 1391b15d463d4816fc084767cbeda3ee69ff5527545Brad Fitzpatrick close(parent_ptty); 1408c4873319a77c54cc198a4e5f4429099ff9da4f7Steve Block ALOG(LOG_ERROR, "logwrapper", "Problem with child ptty"); 14149e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat return -errno; 14249e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } 14349e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 14449e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat // redirect stdout and stderr 14549e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat close(parent_ptty); 14649e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat dup2(child_ptty, 1); 14749e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat dup2(child_ptty, 2); 14849e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat close(child_ptty); 14949e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 15049e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat if (background) { 15149e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat int fd = open("/dev/cpuctl/bg_non_interactive/tasks", O_WRONLY); 1521b15d463d4816fc084767cbeda3ee69ff5527545Brad Fitzpatrick if (fd >= 0) { 15349e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat char text[64]; 15449e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat sprintf(text, "%d", getpid()); 15549e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat if (write(fd, text, strlen(text)) < 0) { 1568c4873319a77c54cc198a4e5f4429099ff9da4f7Steve Block ALOG(LOG_WARN, "logwrapper", 15749e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat "Unable to background process (%s)", strerror(errno)); 15849e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } 15949e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat close(fd); 16049e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } else { 1618c4873319a77c54cc198a4e5f4429099ff9da4f7Steve Block ALOG(LOG_WARN, "logwrapper", 16249e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat "Unable to background process (%s)", strerror(errno)); 16349e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } 16449e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } 16549e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 16649e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat child(argc, argv); 16749e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } else { 1688c940ef7dbd423cadc92982b44a65ed1014389e2San Mehat /* 1698c940ef7dbd423cadc92982b44a65ed1014389e2San Mehat * Parent 1708c940ef7dbd423cadc92982b44a65ed1014389e2San Mehat */ 1718c940ef7dbd423cadc92982b44a65ed1014389e2San Mehat int rc = parent(argv[0], parent_ptty); 1728c940ef7dbd423cadc92982b44a65ed1014389e2San Mehat close(parent_ptty); 1738c940ef7dbd423cadc92982b44a65ed1014389e2San Mehat return rc; 17449e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat } 17549e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat 17649e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat return 0; 17749e2bce5b74129c26a35e25d4693cbfe98c4688eSan Mehat} 178