rmtree.c File Reference

#include "postgres.h"
#include <unistd.h>
#include <sys/stat.h>

Include dependency graph for rmtree.c:

Go to the source code of this file.

Functions
bool	rmtree (const char *path, bool rmtopdir)

Function Documentation

bool rmtree	(	const char *	path,
		bool	rmtopdir
	)

Definition at line 36 of file rmtree.c.

References _, elog, filename, lstat, MAXPGPATH, NULL, pgfnames(), pgfnames_cleanup(), result, rmtree(), snprintf(), strerror(), unlink(), and WARNING.

Referenced by cleanup_directories_atexit(), convert_sourcefiles_in(), create_tablespace_directories(), CreateSlotOnDisk(), dbase_redo(), exit_nicely(), movedb(), movedb_failure_callback(), regression_main(), remove_dbtablespaces(), remove_new_subdir(), ReplicationSlotDropPtr(), RestoreSlotFromDisk(), rmtree(), and StartupReplicationSlots().

{
    bool        result = true;
    char        pathbuf[MAXPGPATH];
    char      **filenames;
    char      **filename;
    struct stat statbuf;

    /*
     * we copy all the names out of the directory before we start modifying
     * it.
     */
    filenames = pgfnames(path);

    if (filenames == NULL)
        return false;

    /* now we have the names we can start removing things */
    for (filename = filenames; *filename; filename++)
    {
        snprintf(pathbuf, MAXPGPATH, "%s/%s", path, *filename);

        /*
         * It's ok if the file is not there anymore; we were just about to
         * delete it anyway.
         *
         * This is not an academic possibility. One scenario where this
         * happens is when bgwriter has a pending unlink request for a file in
         * a database that's being dropped. In dropdb(), we call
         * ForgetDatabaseFsyncRequests() to flush out any such pending unlink
         * requests, but because that's asynchronous, it's not guaranteed that
         * the bgwriter receives the message in time.
         */
        if (lstat(pathbuf, &statbuf) != 0)
        {
            if (errno != ENOENT)
            {
#ifndef FRONTEND
                elog(WARNING, "could not stat file or directory \"%s\": %m",
                     pathbuf);
#else
                fprintf(stderr, _("could not stat file or directory \"%s\": %s\n"),
                        pathbuf, strerror(errno));
#endif
                result = false;
            }
            continue;
        }

        if (S_ISDIR(statbuf.st_mode))
        {
            /* call ourselves recursively for a directory */
            if (!rmtree(pathbuf, true))
            {
                /* we already reported the error */
                result = false;
            }
        }
        else
        {
            if (unlink(pathbuf) != 0)
            {
                if (errno != ENOENT)
                {
#ifndef FRONTEND
                    elog(WARNING, "could not remove file or directory \"%s\": %m",
                         pathbuf);
#else
                    fprintf(stderr, _("could not remove file or directory \"%s\": %s\n"),
                            pathbuf, strerror(errno));
#endif
                    result = false;
                }
            }
        }
    }

    if (rmtopdir)
    {
        if (rmdir(path) != 0)
        {
#ifndef FRONTEND
            elog(WARNING, "could not remove file or directory \"%s\": %m",
                 path);
#else
            fprintf(stderr, _("could not remove file or directory \"%s\": %s\n"),
                    path, strerror(errno));
#endif
            result = false;
        }
    }

    pgfnames_cleanup(filenames);

    return result;
}