dir.c

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

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#include "fileio.h"
#include "apr_strings.h"
#include "apr_portable.h"
#if APR_HAVE_SYS_SYSLIMITS_H
#include <sys/syslimits.h>
#endif
#if APR_HAVE_LIMITS_H
#include <limits.h>
#endif

static apr_status_t dir_cleanup(void *thedir)
{
    apr_dir_t *dir = thedir;
    if (closedir(dir->dirstruct) == 0) {
        return APR_SUCCESS;
    }
    else {
        return errno;
    }
} 

apr_status_t apr_dir_open(apr_dir_t **new, const char *dirname, apr_pool_t *cont)
{
    /* On some platforms (e.g., Linux+GNU libc), d_name[] in struct 
     * dirent is declared with enough storage for the name.  On other
     * platforms (e.g., Solaris 8 for Intel), d_name is declared as a
     * one-byte array.  Note: gcc evaluates this at compile time.
     */
    apr_size_t dirent_size = 
        (sizeof((*new)->entry->d_name) > 1 ? 
         sizeof(struct dirent) : sizeof (struct dirent) + 255);

    (*new) = (apr_dir_t *)apr_palloc(cont, sizeof(apr_dir_t));

    (*new)->cntxt = cont;
    (*new)->dirname = apr_pstrdup(cont, dirname);
    (*new)->dirstruct = opendir(dirname);
    (*new)->entry = apr_pcalloc(cont, dirent_size);

    if ((*new)->dirstruct == NULL) {
        return errno;
    }    
    else {
        apr_pool_cleanup_register((*new)->cntxt, (void *)(*new), dir_cleanup,
	                    apr_pool_cleanup_null);
        return APR_SUCCESS;
    }
}

apr_status_t apr_dir_close(apr_dir_t *thedir)
{
    apr_pool_cleanup_kill(thedir->cntxt, thedir, dir_cleanup);
    return dir_cleanup(thedir);
}

apr_status_t apr_dir_read(apr_finfo_t *finfo, apr_int32_t wanted,
                          apr_dir_t *thedir)
{
    apr_status_t ret = 0;
#if APR_HAS_THREADS && defined(_POSIX_THREAD_SAFE_FUNCTIONS) \
    && !defined(READDIR_IS_THREAD_SAFE)
    struct dirent *retent;

    ret = readdir_r(thedir->dirstruct, thedir->entry, &retent);

    /* Avoid the Linux problem where at end-of-directory thedir->entry
     * is set to NULL, but ret = APR_SUCCESS.
     */
    if(!ret && thedir->entry != retent)
        ret = APR_ENOENT;
#else
    thedir->entry = readdir(thedir->dirstruct);
    if (thedir->entry == NULL) {
        /* If NULL was returned, this can NEVER be a success. Can it?! */
        if (errno == APR_SUCCESS) {
            ret = APR_ENOENT;
        }
        else
            ret = errno;
    }
#endif

    /* No valid bit flag to test here - do we want one? */
    finfo->fname = NULL;

    if (ret) {
        finfo->valid = 0;
        return ret;
    }

    /* What we already know - and restrict the wanted test below to stat
     * only if stat will give us what this platform supports, and we can't
     * get it from the platform.
     * XXX: Optimize here with d_fileno, d_type etc by platform */
    wanted &= ~(APR_FINFO_NAME);
    if (wanted)
    {
        char fspec[APR_PATH_MAX];
        int off;
        apr_cpystrn(fspec, thedir->dirname, sizeof(fspec));
        off = strlen(fspec);
        if (fspec[off - 1] != '/')
            fspec[off++] = '/';
        apr_cpystrn(fspec + off, thedir->entry->d_name, sizeof(fspec) - off);
        /* ??? Or lstat below?  What is it we really want? */
        ret = apr_stat(finfo, fspec, wanted, thedir->cntxt);
    }

    if (wanted && (ret == APR_SUCCESS || ret == APR_INCOMPLETE)) {
        wanted &= ~finfo->valid;
        ret = APR_SUCCESS;
    }
    else {
        /* We don't bail because we fail to stat, when we are only -required-
         * to readdir... but the result will be APR_INCOMPLETE
         */
        finfo->cntxt = thedir->cntxt;
        finfo->valid = 0;
    }

    /* We passed a stack name that is now gone */
    finfo->fname = NULL;
    finfo->valid |= APR_FINFO_NAME;
    /* XXX: Optimize here with d_fileno, d_type etc by platform */
    finfo->name = thedir->entry->d_name;

    if (wanted)
        return APR_INCOMPLETE;

    return APR_SUCCESS;
}

apr_status_t apr_dir_rewind(apr_dir_t *thedir)
{
    rewinddir(thedir->dirstruct);
    return APR_SUCCESS;
}

apr_status_t apr_dir_make(const char *path, apr_fileperms_t perm, apr_pool_t *cont)
{
    mode_t mode = apr_unix_perms2mode(perm);

    if (mkdir(path, mode) == 0) {
        return APR_SUCCESS;
    }
    else {
        return errno;
    }
}

apr_status_t apr_dir_remove(const char *path, apr_pool_t *cont)
{
    if (rmdir(path) == 0) {
        return APR_SUCCESS;
    }
    else {
        return errno;
    }
}

apr_status_t apr_os_dir_get(apr_os_dir_t **thedir, apr_dir_t *dir)
{
    if (dir == NULL) {
        return APR_ENODIR;
    }
    *thedir = dir->dirstruct;
    return APR_SUCCESS;
}

apr_status_t apr_os_dir_put(apr_dir_t **dir, apr_os_dir_t *thedir,
                          apr_pool_t *cont)
{
    if ((*dir) == NULL) {
        (*dir) = (apr_dir_t *)apr_pcalloc(cont, sizeof(apr_dir_t));
        (*dir)->cntxt = cont;
    }
    (*dir)->dirstruct = thedir;
    return APR_SUCCESS;
}