95 lines
1.9 KiB
C
95 lines
1.9 KiB
C
/*-------------------------------------------------------------------------
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*
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* pgfnames.c
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* directory handling functions
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*
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* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* IDENTIFICATION
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* src/common/pgfnames.c
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef FRONTEND
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#include "postgres.h"
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#else
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#include "postgres_fe.h"
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#endif
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#include <dirent.h>
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#ifndef FRONTEND
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#define pg_log_warning(...) elog(WARNING, __VA_ARGS__)
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#else
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#include "common/logging.h"
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#endif
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/*
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* pgfnames
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*
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* return a list of the names of objects in the argument directory. Caller
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* must call pgfnames_cleanup later to free the memory allocated by this
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* function.
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*/
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char **
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pgfnames(const char *path)
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{
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DIR *dir;
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struct dirent *file;
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char **filenames;
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int numnames = 0;
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int fnsize = 200; /* enough for many small dbs */
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dir = opendir(path);
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if (dir == NULL)
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{
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pg_log_warning("could not open directory \"%s\": %m", path);
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return NULL;
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}
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filenames = (char **) palloc(fnsize * sizeof(char *));
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while (errno = 0, (file = readdir(dir)) != NULL)
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{
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if (strcmp(file->d_name, ".") != 0 && strcmp(file->d_name, "..") != 0)
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{
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if (numnames + 1 >= fnsize)
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{
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fnsize *= 2;
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filenames = (char **) repalloc(filenames,
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fnsize * sizeof(char *));
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}
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filenames[numnames++] = pstrdup(file->d_name);
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}
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}
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if (errno)
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pg_log_warning("could not read directory \"%s\": %m", path);
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filenames[numnames] = NULL;
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if (closedir(dir))
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pg_log_warning("could not close directory \"%s\": %m", path);
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return filenames;
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}
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/*
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* pgfnames_cleanup
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*
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* deallocate memory used for filenames
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*/
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void
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pgfnames_cleanup(char **filenames)
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{
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char **fn;
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for (fn = filenames; *fn; fn++)
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pfree(*fn);
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pfree(filenames);
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}
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