/*-------------------------------------------------------------------------
*
* rmtree . c
*
* Portions Copyright ( c ) 1996 - 2025 , PostgreSQL Global Development Group
* Portions Copyright ( c ) 1994 , Regents of the University of California
*
* IDENTIFICATION
* src / common / rmtree . c
*
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
*/
#ifndef FRONTEND
#include "postgres.h"
#else
#include "postgres_fe.h"
#endif
#include <unistd.h>
#include <sys/stat.h>
#include "common/file_utils.h"
#ifndef FRONTEND
#include "storage/fd.h"
#define pg_log_warning(...) elog(WARNING, __VA_ARGS__)
#define LOG_LEVEL WARNING
#define OPENDIR(x) AllocateDir(x)
#define CLOSEDIR(x) FreeDir(x)
#else
#include "common/logging.h"
#define LOG_LEVEL PG_LOG_WARNING
#define OPENDIR(x) opendir(x)
#define CLOSEDIR(x) closedir(x)
#endif
/*
* rmtree
*
* Delete a directory tree recursively .
* Assumes path points to a valid directory .
* Deletes everything under path .
* If rmtopdir is true deletes the directory too .
* Returns true if successful , false if there was any problem .
* ( The details of the problem are reported already , so caller
* doesn ' t really have to say anything more , but most do . )
*/
bool
rmtree(const char *path, bool rmtopdir)
{
char pathbuf[MAXPGPATH];
DIR *dir;
struct dirent *de;
bool result = true ;
size_t dirnames_size = 0 ;
size_t dirnames_capacity = 8 ;
char **dirnames;
dir = OPENDIR(path);
if (dir == NULL)
{
pg_log_warning("could not open directory \" %s\": %m" , path);
return false ;
}
dirnames = (char **) palloc(sizeof (char *) * dirnames_capacity);
while (errno = 0 , (de = readdir(dir)))
{
if (strcmp(de->d_name, "." ) == 0 ||
strcmp(de->d_name, ".." ) == 0 )
continue ;
snprintf(pathbuf, sizeof (pathbuf), "%s/%s" , path, de->d_name);
switch (get_dirent_type(pathbuf, de, false , LOG_LEVEL))
{
case PGFILETYPE_ERROR:
/* already logged, press on */
break ;
case PGFILETYPE_DIR:
/*
* Defer recursion until after we ' ve closed this directory , to
* avoid using more than one file descriptor at a time .
*/
if (dirnames_size == dirnames_capacity)
{
dirnames = repalloc(dirnames,
sizeof (char *) * dirnames_capacity * 2 );
dirnames_capacity *= 2 ;
}
dirnames[dirnames_size++] = pstrdup(pathbuf);
break ;
default :
if (unlink(pathbuf) != 0 && errno != ENOENT)
{
pg_log_warning("could not remove file \" %s\": %m" , pathbuf);
result = false ;
}
break ;
}
}
if (errno != 0 )
{
pg_log_warning("could not read directory \" %s\": %m" , path);
result = false ;
}
CLOSEDIR(dir);
/* Now recurse into the subdirectories we found. */
for (size_t i = 0 ; i < dirnames_size; ++i)
{
if (!rmtree(dirnames[i], true ))
result = false ;
pfree(dirnames[i]);
}
if (rmtopdir)
{
if (rmdir(path) != 0 )
{
pg_log_warning("could not remove directory \" %s\": %m" , path);
result = false ;
}
}
pfree(dirnames);
return result;
}
Messung V0.5 in Prozent C=97 H=91 G=93
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