proc.c

Apache V2.0.15 Alpha For Linuxhttpd-2_0_15-alpha.tar.Z

                                const char * const *env,
                                apr_procattr_t *attr, apr_pool_t *cont)
{
    int i, arg, numargs, cmdlen;
    apr_status_t status;
    const char **newargs;
    char savedir[300];
    HFILE save_in, save_out, save_err, dup;
    int criticalsection = FALSE;
    char *extension, *newprogname, *extra_arg = NULL, *cmdline, *cmdline_pos;
    char interpreter[1024];
    char error_object[260];
    apr_file_t *progfile;
    int env_len, e;
    char *env_block, *env_block_pos;
    RESULTCODES rescodes;

    /* Prevent other threads from running while these process-wide resources are modified */
    if (attr->child_in || attr->child_out || attr->child_err || attr->currdir) {
        criticalsection = TRUE;
        DosEnterCritSec();
    }

    if (attr->child_in) {
        save_in = -1;
        DosDupHandle(STDIN_FILENO, &save_in);
        dup = STDIN_FILENO;
        DosDupHandle(attr->child_in->filedes, &dup);
        DosSetFHState(attr->parent_in->filedes, OPEN_FLAGS_NOINHERIT);
    }
    
    if (attr->child_out) {
        save_out = -1;
        DosDupHandle(STDOUT_FILENO, &save_out);
        dup = STDOUT_FILENO;
        DosDupHandle(attr->child_out->filedes, &dup);
        DosSetFHState(attr->parent_out->filedes, OPEN_FLAGS_NOINHERIT);
    }
    
    if (attr->child_err) {
        save_err = -1;
        DosDupHandle(STDERR_FILENO, &save_err);
        dup = STDERR_FILENO;
        DosDupHandle(attr->child_err->filedes, &dup);
        DosSetFHState(attr->parent_err->filedes, OPEN_FLAGS_NOINHERIT);
    }

    apr_signal(SIGCHLD, SIG_DFL); /*not sure if this is needed or not */

    if (attr->currdir != NULL) {
        _getcwd2(savedir, sizeof(savedir));
        
        if (_chdir2(attr->currdir) < 0) {
            if (criticalsection)
                DosExitCritSec();
            return errno;
        }
    }

    interpreter[0] = 0;
    extension = strrchr(progname, '.');

    if (extension == NULL || strchr(extension, '/') || strchr(extension, '\\'))
        extension = "";

    if (attr->cmdtype == APR_SHELLCMD || strcasecmp(extension, ".cmd") == 0) {
        strcpy(interpreter, "#!" SHELL_PATH);
        extra_arg = "/C";
    } else if (stricmp(extension, ".exe") != 0) {
        status = apr_file_open(&progfile, progname, APR_READ|APR_BUFFERED, 0, cont);

        if (status != APR_SUCCESS && APR_STATUS_IS_ENOENT(status)) {
            progname = apr_pstrcat(cont, progname, ".exe", NULL);
        }

        if (status == APR_SUCCESS) {
            status = apr_file_gets(interpreter, sizeof(interpreter), progfile);

            if (status == APR_SUCCESS) {
                if (interpreter[0] == '#' && interpreter[1] == '!') {
                    if (interpreter[2] != '/' && interpreter[2] != '\\' && interpreter[3] != ':') {
                        char buffer[300];

                        if (DosSearchPath(SEARCH_ENVIRONMENT, "PATH", interpreter+2, buffer, sizeof(buffer)) == 0) {
                            strcpy(interpreter+2, buffer);
                        } else {
                            strcat(interpreter, ".exe");
                            if (DosSearchPath(SEARCH_ENVIRONMENT, "PATH", interpreter+2, buffer, sizeof(buffer)) == 0) {
                                strcpy(interpreter+2, buffer);
                            }
                        }
                    }
                } else {
                    interpreter[0] = 0;
                }
            }
        }
        apr_file_close(progfile);
    }

    i = 0;

    while (args && args[i]) {
        i++;
    }

    newargs = (const char **)apr_palloc(cont, sizeof (char *) * (i + 4));
    numargs = 0;

    if (interpreter[0])
        newargs[numargs++] = interpreter + 2;
    if (extra_arg)
        newargs[numargs++] = "/c";

    newargs[numargs++] = newprogname = apr_pstrdup(cont, progname);
    arg = 1;

    while (args && args[arg]) {
        newargs[numargs++] = args[arg++];
    }

    newargs[numargs] = NULL;

    for (i=0; newprogname[i]; i++)
        if (newprogname[i] == '/')
            newprogname[i] = '\\';

    cmdlen = 0;

    for (i=0; i<numargs; i++)
        cmdlen += strlen(newargs[i]) + 3;

    cmdline = apr_palloc(cont, cmdlen + 2);
    cmdline_pos = cmdline;

    for (i=0; i<numargs; i++) {
        const char *a = newargs[i];

        if (strpbrk(a, "&|<>\" "))
            a = apr_pstrcat(cont, "\"", double_quotes(cont, a), "\"", NULL);

        if (i)
            *(cmdline_pos++) = ' ';

        strcpy(cmdline_pos, a);
        cmdline_pos += strlen(cmdline_pos);
    }

    *(++cmdline_pos) = 0; /* Add required second terminator */
    cmdline_pos = strchr(cmdline, ' ');

    if (cmdline_pos) {
        *cmdline_pos = 0;
        cmdline_pos++;
    }

    /* Create environment block from list of envariables */
    if (env) {
        for (env_len=1, e=0; env[e]; e++)
            env_len += strlen(env[e]) + 1;

        env_block = apr_palloc(cont, env_len);
        env_block_pos = env_block;

        for (e=0; env[e]; e++) {
            strcpy(env_block_pos, env[e]);
            env_block_pos += strlen(env_block_pos) + 1;
        }

        *env_block_pos = 0; /* environment block is terminated by a double null */
    } else
        env_block = NULL;

    status = DosExecPgm(error_object, sizeof(error_object),
                        attr->detached ? EXEC_BACKGROUND : EXEC_ASYNCRESULT,
                        cmdline, env_block, &rescodes, cmdline);

    proc->pid = rescodes.codeTerminate;

    if (attr->currdir != NULL) {
        chdir(savedir);
    }

    if (attr->child_in) {
        apr_file_close(attr->child_in);
        dup = STDIN_FILENO;
        DosDupHandle(save_in, &dup);
        DosClose(save_in);
    }
    
    if (attr->child_out) {
        apr_file_close(attr->child_out);
        dup = STDOUT_FILENO;
        DosDupHandle(save_out, &dup);
        DosClose(save_out);
    }
    
    if (attr->child_err) {
        apr_file_close(attr->child_err);
        dup = STDERR_FILENO;
        DosDupHandle(save_err, &dup);
        DosClose(save_err);
    }

    if (criticalsection)
        DosExitCritSec();

    proc->in = attr->parent_in;
    proc->err = attr->parent_err;
    proc->out = attr->parent_out;
    return status;
}



apr_status_t apr_proc_wait_all_procs(apr_proc_t *proc, apr_wait_t *status,
                              apr_wait_how_e waithow, apr_pool_t *p)
{
    RESULTCODES codes;
    ULONG rc;
    PID pid;

    if (!proc)
        return APR_ENOPROC;

    rc = DosWaitChild(DCWA_PROCESSTREE, wait == APR_WAIT ? DCWW_WAIT : DCWW_NOWAIT, &codes, &pid, 0);

    if (rc == 0) {
        proc->pid = pid;

        if (status)
            *status = codes.codeResult;

        return APR_CHILD_DONE;
    } else if (rc == ERROR_CHILD_NOT_COMPLETE) {
        return APR_CHILD_NOTDONE;
    }

    return APR_OS2_STATUS(rc);
} 



apr_status_t apr_proc_wait(apr_proc_t *proc,
                           apr_wait_how_e wait)
{
    RESULTCODES codes;
    ULONG rc;
    PID pid;

    if (!proc)
        return APR_ENOPROC;

    rc = DosWaitChild(DCWA_PROCESS, wait == APR_WAIT ? DCWW_WAIT : DCWW_NOWAIT, &codes, &pid, proc->pid);

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

    return APR_OS2_STATUS(rc);
} 



apr_status_t apr_get_os_proc(apr_os_proc_t *theproc, apr_proc_t *proc)
{
    if (proc == NULL) {
        return APR_ENOPROC;
    }
    *theproc = proc->pid;
    return APR_SUCCESS;
}



apr_status_t apr_proc_detach()
{
    return APR_ENOTIMPL;
}