proc.c

Apache官方在今天放出产品系列2.2的最新版本2.2.11的源码包 最流行的HTTP服务器软件之一

        if ((setrlimit(RLIMIT_CPU, attr->limit_cpu)) != 0) {
            return errno;
        }
    }
#endif
#ifdef RLIMIT_NPROC
    if (attr->limit_nproc != NULL) {
        if ((setrlimit(RLIMIT_NPROC, attr->limit_nproc)) != 0) {
            return errno;
        }
    }
#endif
#if defined(RLIMIT_AS)
    if (attr->limit_mem != NULL) {
        if ((setrlimit(RLIMIT_AS, attr->limit_mem)) != 0) {
            return errno;
        }
    }
#elif defined(RLIMIT_DATA)
    if (attr->limit_mem != NULL) {
        if ((setrlimit(RLIMIT_DATA, attr->limit_mem)) != 0) {
            return errno;
        }
    }
#elif defined(RLIMIT_VMEM)
    if (attr->limit_mem != NULL) {
        if ((setrlimit(RLIMIT_VMEM, attr->limit_mem)) != 0) {
            return errno;
        }
    }
#endif
#else
    /*
     * Maybe make a note in error_log that setrlimit isn't supported??
     */

#endif
    return APR_SUCCESS;
}

APR_DECLARE(apr_status_t) apr_procattr_child_errfn_set(apr_procattr_t *attr,
                                                       apr_child_errfn_t *errfn)
{
    /* won't ever be called on this platform, so don't save the function pointer */
    return APR_SUCCESS;
}

APR_DECLARE(apr_status_t) apr_procattr_error_check_set(apr_procattr_t *attr,
                                                       apr_int32_t chk)
{
    /* won't ever be used on this platform, so don't save the flag */
    return APR_SUCCESS;
}

APR_DECLARE(apr_status_t) apr_procattr_addrspace_set(apr_procattr_t *attr,
                                                       apr_int32_t addrspace)
{
    attr->addrspace = addrspace;
    return APR_SUCCESS;
}

APR_DECLARE(apr_status_t) apr_proc_create(apr_proc_t *newproc,
									const char *progname, 
									const char * const *args, 
									const char * const *env,
                              		apr_procattr_t *attr, 
                              		apr_pool_t *pool)
{
    wiring_t wire;
    int      addr_space;

    wire.infd  = attr->child_in  
               ? (attr->child_in->filedes != -1 ? attr->child_in->filedes 
                                                : FD_UNUSED)
               : fileno(stdin);
    wire.outfd  = attr->child_out
                ? (attr->child_out->filedes != -1 ? attr->child_out->filedes 
                                                  : FD_UNUSED)
                : fileno(stdout);
    wire.errfd  = attr->child_err
                ? (attr->child_err->filedes != -1 ? attr->child_err->filedes 
                                                  : FD_UNUSED)
                : fileno(stderr);

    newproc->in = attr->parent_in;
    newproc->out = attr->parent_out;
    newproc->err = attr->parent_err;

    /* attr->detached and PROC_DETACHED do not mean the same thing.  attr->detached means
     * start the NLM in a separate address space.  PROC_DETACHED means don't wait for the
     * NLM to unload by calling wait() or waitpid(), just clean up */
    addr_space = PROC_LOAD_SILENT | (attr->addrspace ? 0 : PROC_CURRENT_SPACE);
    addr_space |= (attr->detached ? PROC_DETACHED : 0);

    if (attr->currdir) {
        char *fullpath = NULL;
        apr_status_t rv;

        if ((rv = apr_filepath_merge(&fullpath, attr->currdir, progname, 
                                     APR_FILEPATH_NATIVE, pool)) != APR_SUCCESS) {
            return rv;
        }
        progname = fullpath;
    } 

    if ((newproc->pid = procve(progname, addr_space, (const char**)env, &wire, 
        NULL, NULL, 0, NULL, (const char **)args)) == -1) {
        return errno;
    }

    if (attr->child_in && (attr->child_in->filedes != -1)) {
        apr_pool_cleanup_kill(apr_file_pool_get(attr->child_in), 
                              attr->child_in, apr_unix_file_cleanup);
        apr_file_close(attr->child_in);
    }
    if (attr->child_out && (attr->child_out->filedes != -1)) {
        apr_pool_cleanup_kill(apr_file_pool_get(attr->child_out), 
                              attr->child_out, apr_unix_file_cleanup);
        apr_file_close(attr->child_out);
    }
    if (attr->child_err && (attr->child_err->filedes != -1)) {
        apr_pool_cleanup_kill(apr_file_pool_get(attr->child_err), 
                              attr->child_err, apr_unix_file_cleanup);
        apr_file_close(attr->child_err);
    }

    apr_pool_cleanup_register(pool, (void *)newproc, apr_netware_proc_cleanup,
        apr_pool_cleanup_null);

    return APR_SUCCESS;
}

APR_DECLARE(apr_status_t) apr_proc_wait_all_procs(apr_proc_t *proc,
                                                  int *exitcode,
                                                  apr_exit_why_e *exitwhy,
                                                  apr_wait_how_e waithow,
                                                  apr_pool_t *p)
{
    proc->pid = -1;
    return apr_proc_wait(proc, exitcode, exitwhy, waithow);
}

APR_DECLARE(apr_status_t) apr_proc_wait(apr_proc_t *proc,
                                        int *exitcode, apr_exit_why_e *exitwhy,
                                        apr_wait_how_e waithow)
{
    pid_t pstatus;
    int waitpid_options = WUNTRACED;
    int exit_int;
    int ignore;
    apr_exit_why_e ignorewhy;

    if (exitcode == NULL) {
        exitcode = &ignore;
    }

    if (exitwhy == NULL) {
        exitwhy = &ignorewhy;
    }

    if (waithow != APR_WAIT) {
        waitpid_options |= WNOHANG;
    }

    /* If the pid is 0 then the process was started detached. There 
       is no need to wait since there is nothing to wait for on a 
       detached process.  Starting a process as non-detached and
       then calling wait or waitpid could cause the thread to hang.
       The reason for this is because NetWare does not have a way 
       to kill or even signal a process to be killed.  Starting 
       all processes as detached avoids the possibility of a 
       thread hanging. */
    if (proc->pid == 0) {
        *exitwhy = APR_PROC_EXIT;
        *exitcode = 0;
        return APR_CHILD_DONE;
    }

    if ((pstatus = waitpid(proc->pid, &exit_int, waitpid_options)) > 0) {
        proc->pid = pstatus;

        if (WIFEXITED(exit_int)) {
            *exitwhy = APR_PROC_EXIT;
            *exitcode = WEXITSTATUS(exit_int);
        }
        else if (WIFSIGNALED(exit_int)) {
            *exitwhy = APR_PROC_SIGNAL;
            *exitcode = WIFTERMSIG(exit_int);
        }
        else {
            /* unexpected condition */
            return APR_EGENERAL;
        }

        return APR_CHILD_DONE;
    }
    else if (pstatus == 0) {
        return APR_CHILD_NOTDONE;
    }

    return errno;
}

APR_DECLARE(apr_status_t) apr_procattr_limit_set(apr_procattr_t *attr, apr_int32_t what, 
                          struct rlimit *limit)
{
    switch(what) {
        case APR_LIMIT_CPU:
#ifdef RLIMIT_CPU
            attr->limit_cpu = limit;
            break;
#else
            return APR_ENOTIMPL;
#endif
        case APR_LIMIT_MEM:
#if defined (RLIMIT_DATA) || defined (RLIMIT_VMEM) || defined(RLIMIT_AS)
            attr->limit_mem = limit;
            break;
#else
            return APR_ENOTIMPL;
#endif
        case APR_LIMIT_NPROC:
#ifdef RLIMIT_NPROC
            attr->limit_nproc = limit;
            break;
#else
            return APR_ENOTIMPL;
#endif
    }
    return APR_SUCCESS;
}  

APR_DECLARE(apr_status_t) apr_procattr_user_set(apr_procattr_t *attr, 
                                                const char *username,
                                                const char *password)
{
    /* Always return SUCCESS because NetWare threads don't run as a user */
    return APR_SUCCESS;
}

APR_DECLARE(apr_status_t) apr_procattr_group_set(apr_procattr_t *attr,
                                                 const char *groupname)
{
    /* Always return SUCCESS because NetWare threads don't run within a group */
    return APR_SUCCESS;
}