greenplumn pgfnames 源码
greenplumn pgfnames 代码
文件路径：/src/common/pgfnames.c
/*-------------------------------------------------------------------------
*
* pgfnames.c
* directory handling functions
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* src/common/pgfnames.c
*
*-------------------------------------------------------------------------
*/
#ifndef FRONTEND
#include "postgres.h"
#else
#include "postgres_fe.h"
#endif
#include <dirent.h>
#ifndef FRONTEND
#define pg_log_warning(...) elog(WARNING, __VA_ARGS__)
#else
#include "common/logging.h"
#endif
/*
* pgfnames
*
* return a list of the names of objects in the argument directory. Caller
* must call pgfnames_cleanup later to free the memory allocated by this
* function.
*/
char **
pgfnames(const char *path)
{
DIR *dir;
struct dirent *file;
char **filenames;
int numnames = 0;
int fnsize = 200; /* enough for many small dbs */
dir = opendir(path);
if (dir == NULL)
{
pg_log_warning("could not open directory \"%s\": %m", path);
return NULL;
}
filenames = (char **) palloc(fnsize * sizeof(char *));
while (errno = 0, (file = readdir(dir)) != NULL)
{
if (strcmp(file->d_name, ".") != 0 && strcmp(file->d_name, "..") != 0)
{
if (numnames + 1 >= fnsize)
{
fnsize *= 2;
filenames = (char **) repalloc(filenames,
fnsize * sizeof(char *));
}
filenames[numnames++] = pstrdup(file->d_name);
}
}
if (errno)
pg_log_warning("could not read directory \"%s\": %m", path);
filenames[numnames] = NULL;
if (closedir(dir))
pg_log_warning("could not close directory \"%s\": %m", path);
return filenames;
}
/*
* pgfnames_cleanup
*
* deallocate memory used for filenames
*/
void
pgfnames_cleanup(char **filenames)
{
char **fn;
for (fn = filenames; *fn; fn++)
pfree(*fn);
pfree(filenames);
}
相关信息
相关文章
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
7、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦