| /* ==================================================================== |
| * Copyright (c) 1999 The Apache Group. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. 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. |
| * |
| * 3. All advertising materials mentioning features or use of this |
| * software must display the following acknowledgment: |
| * "This product includes software developed by the Apache Group |
| * for use in the Apache HTTP server project (http://www.apache.org/)." |
| * |
| * 4. The names "Apache Server" and "Apache Group" must not be used to |
| * endorse or promote products derived from this software without |
| * prior written permission. For written permission, please contact |
| * apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache" |
| * nor may "Apache" appear in their names without prior written |
| * permission of the Apache Group. |
| * |
| * 6. Redistributions of any form whatsoever must retain the following |
| * acknowledgment: |
| * "This product includes software developed by the Apache Group |
| * for use in the Apache HTTP server project (http://www.apache.org/)." |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY |
| * EXPRESSED 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 APACHE GROUP OR |
| * ITS 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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Group. |
| * For more information on the Apache Group and the Apache HTTP server |
| * project, please see <http://www.apache.org/>. |
| * |
| */ |
| |
| #include "threadproc.h" |
| #include "fileio.h" |
| |
| #include "apr_thread_proc.h" |
| #include "apr_file_io.h" |
| #include "apr_general.h" |
| #include "apr_lib.h" |
| #include "apr_portable.h" |
| #include <signal.h> |
| #include <string.h> |
| #include <sys/wait.h> |
| #include <unistd.h> |
| |
| /* ***APRDOC******************************************************** |
| * ap_status_t ap_createprocattr_init(ap_context_t *, ap_procattr_t **) |
| * Create and initialize a new procattr variable |
| * arg 1) The context to use |
| * arg 2) The newly created procattr. |
| */ |
| ap_status_t ap_createprocattr_init(ap_context_t *cont, struct procattr_t **new) |
| { |
| (*new) = (struct procattr_t *)ap_palloc(cont, |
| sizeof(struct procattr_t)); |
| |
| if ((*new) == NULL) { |
| return APR_ENOMEM; |
| } |
| (*new)->cntxt = cont; |
| (*new)->parent_in = NULL; |
| (*new)->child_in = NULL; |
| (*new)->parent_out = NULL; |
| (*new)->child_out = NULL; |
| (*new)->parent_err = NULL; |
| (*new)->child_err = NULL; |
| (*new)->currdir = NULL; |
| (*new)->cmdtype = APR_PROGRAM; |
| return APR_SUCCESS; |
| } |
| |
| /* ***APRDOC******************************************************** |
| * ap_status_t ap_setprocattr_io(ap_procattr_t *, ap_int32_t, ap_int32_t |
| * ap_int32_t) |
| * Determine if any of stdin, stdout, or stderr should be linked |
| * to pipes when starting a child process. |
| * arg 1) The procattr we care about. |
| * arg 2) Should stdin be a pipe bnack to the parent? |
| * arg 3) Should stdout be a pipe bnack to the parent? |
| * arg 4) Should stderr be a pipe bnack to the parent? |
| */ |
| ap_status_t ap_setprocattr_io(struct procattr_t *attr, ap_int32_t in, |
| ap_int32_t out, ap_int32_t err) |
| { |
| ap_status_t stat; |
| if (in) { |
| if ((stat = ap_create_pipe(attr->cntxt, &attr->child_in, |
| &attr->parent_in)) != APR_SUCCESS) { |
| return stat; |
| } |
| } |
| if (out) { |
| if ((stat = ap_create_pipe(attr->cntxt, &attr->parent_out, |
| &attr->child_out)) != APR_SUCCESS) { |
| return stat; |
| } |
| } |
| if (err) { |
| if ((stat = ap_create_pipe(attr->cntxt, &attr->parent_err, |
| &attr->child_err)) != APR_SUCCESS) { |
| return stat; |
| } |
| } |
| return APR_SUCCESS; |
| } |
| |
| /* ***APRDOC******************************************************** |
| * ap_status_t ap_setprocattr_dir(ap_procattr_t *, char *) |
| * Set which directory the child process should start executing in. |
| * arg 1) The procattr we care about. |
| * arg 2) Which dir to start in. By default, this is the same dir as |
| * the parent currently resides in, when the createprocess call |
| * is made. |
| */ |
| ap_status_t ap_setprocattr_dir(struct procattr_t *attr, |
| char *dir) |
| { |
| attr->currdir = ap_pstrdup(attr->cntxt, dir); |
| if (attr->currdir) { |
| return APR_SUCCESS; |
| } |
| return APR_ENOMEM; |
| } |
| |
| /* ***APRDOC******************************************************** |
| * ap_status_t ap_setprocattr_cmdtype(ap_procattr_t *, ap_cmdtype_e) |
| * Set what type of command the child process will call. |
| * arg 1) The procattr we care about. |
| * arg 2) The type of command. One of: |
| * APR_SHELLCMD -- Shell script |
| * APR_PROGRAM -- Executable program (default) |
| */ |
| ap_status_t ap_setprocattr_cmdtype(struct procattr_t *attr, |
| ap_cmdtype_e cmd) |
| { |
| attr->cmdtype = cmd; |
| return APR_SUCCESS; |
| } |
| |
| /* ***APRDOC******************************************************** |
| * ap_status_t ap_setprocattr_detach(ap_procattr_t *, ap_int32_t) |
| * Determine if the chlid should start in detached state. |
| * arg 1) The procattr we care about. |
| * arg 2) Should the child start in detached state? Default is no. |
| */ |
| ap_status_t ap_setprocattr_detach(struct procattr_t *attr, ap_int32_t detach) |
| { |
| attr->detached = detach; |
| return APR_SUCCESS; |
| } |
| |
| /* ***APRDOC******************************************************** |
| * ap_status_t ap_fork_detach(ap_context_t *, ap_proc_t **) |
| * This is currently the only non-portable call in APR. This executes |
| * a standard unix fork. |
| * arg 1) The context to use. |
| * arg 2) The resulting process handle. |
| */ |
| ap_status_t ap_fork(ap_context_t *cont, struct proc_t **proc) |
| { |
| int pid; |
| |
| (*proc) = ap_palloc(cont, sizeof(struct proc_t)); |
| |
| if ((pid = fork()) < 0) { |
| return errno; |
| } |
| else if (pid == 0) { |
| (*proc)->pid = pid; |
| (*proc)->attr = NULL; |
| return APR_INCHILD; |
| } |
| (*proc)->pid = pid; |
| (*proc)->attr = NULL; |
| return APR_INPARENT; |
| } |
| |
| /* ***APRDOC******************************************************** |
| * ap_status_t ap_create_process(ap_context_t *, char *, char *const [], |
| char **, ap_procattr_t *, ap_proc_t **) |
| * Create a new process and execute a new program within that process. |
| * arg 1) The context to use. |
| * arg 2) The program to run |
| * arg 3) the arguments to pass to the new program. The first one should |
| * be the program name. |
| * arg 4) The new environment table for the new process. This should be a |
| * list of NULL-terminated strings. |
| * arg 5) the procattr we should use to determine how to create the new |
| * process |
| * arg 6) The resulting process handle. |
| */ |
| ap_status_t ap_create_process(ap_context_t *cont, char *progname, |
| char *const args[], char **env, |
| struct procattr_t *attr, struct proc_t **new) |
| { |
| int i; |
| char **newargs; |
| struct proc_t *pgrp; |
| |
| (*new) = (struct proc_t *)ap_palloc(cont, sizeof(struct proc_t)); |
| |
| if ((*new) == NULL) { |
| return APR_ENOMEM; |
| } |
| |
| (*new)->cntxt = cont; |
| |
| if (((*new)->pid = fork()) < 0) { |
| return errno; |
| } |
| else if ((*new)->pid == 0) { |
| /* child process */ |
| if (attr->child_in) { |
| ap_close(attr->parent_in); |
| dup2(attr->child_in->filedes, STDIN_FILENO); |
| ap_close(attr->child_in); |
| } |
| if (attr->child_out) { |
| ap_close(attr->parent_out); |
| dup2(attr->child_out->filedes, STDOUT_FILENO); |
| ap_close(attr->child_out); |
| } |
| if (attr->child_err) { |
| ap_close(attr->parent_err); |
| dup2(attr->child_err->filedes, STDERR_FILENO); |
| ap_close(attr->child_err); |
| } |
| |
| signal(SIGCHLD, SIG_DFL); /*not sure if this is needed or not */ |
| |
| if (attr->currdir != NULL) { |
| if (chdir(attr->currdir) == -1) { |
| exit(-1); /* We have big problems, the child should exit. */ |
| } |
| } |
| if (attr->cmdtype == APR_SHELLCMD) { |
| i = 0; |
| while (args[i]) { |
| i++; |
| } |
| newargs = (char **)ap_palloc(cont, sizeof (char *) * (i + 3)); |
| newargs[0] = strdup(SHELL_PATH); |
| newargs[1] = strdup("-c"); |
| i = 0; |
| while (args[i]) { |
| newargs[i + 2] = strdup(args[i]); |
| i++; |
| } |
| newargs[i + 3] = NULL; |
| if (attr->detached) { |
| ap_detach(attr->cntxt, &pgrp); |
| } |
| execve(SHELL_PATH, newargs, env); |
| } |
| else { |
| if (attr->detached) { |
| ap_detach(attr->cntxt, &pgrp); |
| } |
| execve(progname, args, env); |
| } |
| exit(-1); /* if we get here, there is a problem, so exit with an */ |
| /* error code. */ |
| } |
| /* Parent process */ |
| if (attr->child_in) { |
| ap_close(attr->child_in); |
| } |
| if (attr->child_out) { |
| ap_close(attr->child_out); |
| } |
| if (attr->child_err) { |
| ap_close(attr->child_err); |
| } |
| |
| (*new)->attr = attr; |
| return APR_SUCCESS; |
| } |
| |
| /* ***APRDOC******************************************************** |
| * ap_status_t ap_get_childin(ap_proc_t *, ap_file_t **) |
| * Get the file handle that is assocaited with a child's stdin. |
| * arg 1) The process handle that corresponds to the desired child process |
| * arg 2) The returned file handle. |
| */ |
| ap_status_t ap_get_childin(struct proc_t *proc, ap_file_t **new) |
| { |
| (*new) = proc->attr->parent_in; |
| return APR_SUCCESS; |
| } |
| |
| /* ***APRDOC******************************************************** |
| * ap_status_t ap_get_childout(ap_proc_t *, ap_file_t **) |
| * Get the file handle that is assocaited with a child's stdout. |
| * arg 1) The process handle that corresponds to the desired child process |
| * arg 2) The returned file handle. |
| */ |
| ap_status_t ap_get_childout(struct proc_t *proc, ap_file_t **new) |
| { |
| (*new) = proc->attr->parent_out; |
| return APR_SUCCESS; |
| } |
| |
| /* ***APRDOC******************************************************** |
| * ap_status_t ap_get_childerr(ap_proc_t *, ap_file_t **) |
| * Get the file handle that is assocaited with a child's stderr. |
| * arg 1) The process handle that corresponds to the desired child process |
| * arg 2) The returned file handle. |
| */ |
| ap_status_t ap_get_childerr(struct proc_t *proc, ap_file_t **new) |
| { |
| (*new) = proc->attr->parent_err; |
| return APR_SUCCESS; |
| } |
| |
| /* ***APRDOC******************************************************** |
| * ap_status_t ap_wait_proc(ap_proc_t *, ap_wait_how) |
| * Wait for a child process to die |
| * arg 1) The process handle that corresponds to the desired child process |
| * arg 2) How should we wait. One of: |
| * APR_WAIT -- block until the child process dies. |
| * APR_NOWAIT -- return immediately regardless of if the |
| * child is dead or not. |
| * NOTE: The childs status is in the return code to this process. It is |
| * one of: |
| * APR_CHILD_DONE -- child is no longer running. |
| * APR_CHILD_NOTDONE -- child is still running. |
| */ |
| ap_status_t ap_wait_proc(struct proc_t *proc, |
| ap_wait_how_e wait) |
| { |
| pid_t stat; |
| if (!proc) |
| return APR_ENOPROC; |
| if (wait == APR_WAIT) { |
| if ((stat = waitpid(proc->pid, NULL, WUNTRACED)) > 0) { |
| return APR_CHILD_DONE; |
| } |
| else if (stat == 0) { |
| return APR_CHILD_NOTDONE; |
| } |
| return errno; |
| } |
| if ((stat = waitpid(proc->pid, NULL, WUNTRACED | WNOHANG)) > 0) { |
| return APR_CHILD_DONE; |
| } |
| else if (stat == 0) { |
| return APR_CHILD_NOTDONE; |
| } |
| return errno; |
| } |
| |
| /* ***APRDOC******************************************************** |
| * ap_status_t ap_get_os_proc(ap_proc_t *, ap_os_proc_t *) |
| * convert the proc from os specific type to apr type. |
| * arg 1) The apr proc to converting |
| * arg 2) The os specific proc we are converting to |
| */ |
| ap_status_t ap_get_os_proc(ap_proc_t *proc, ap_os_proc_t *theproc) |
| { |
| if (proc == NULL) { |
| return APR_ENOPROC; |
| } |
| theproc = &(proc->pid); |
| return APR_SUCCESS; |
| } |
| |
| /* ***APRDOC******************************************************** |
| * ap_status_t ap_put_os_proc(ap_context_t *, ap_proc_t *, ap_os_proc_t *) |
| * convert the proc from os specific type to apr type. |
| * arg 1) The context to use if it is needed. |
| * arg 2) The apr proc we are converting to. |
| * arg 3) The os specific proc to convert |
| */ |
| ap_status_t ap_put_os_proc(ap_context_t *cont, struct proc_t **proc, |
| ap_os_proc_t *theproc) |
| { |
| if (cont == NULL) { |
| return APR_ENOCONT; |
| } |
| if ((*proc) == NULL) { |
| (*proc) = (struct proc_t *)ap_palloc(cont, sizeof(struct proc_t)); |
| (*proc)->cntxt = cont; |
| } |
| (*proc)->pid = *theproc; |
| return APR_SUCCESS; |
| } |
| |
