From 311bcfc6b3acdd6fd152798c7f287ddf74fa2a98 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Tue, 16 Apr 2024 21:46:48 +0200 Subject: Adding upstream version 15.4. Signed-off-by: Daniel Baumann --- src/port/dirent.c | 137 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 137 insertions(+) create mode 100644 src/port/dirent.c (limited to 'src/port/dirent.c') diff --git a/src/port/dirent.c b/src/port/dirent.c new file mode 100644 index 0000000..10ea4bd --- /dev/null +++ b/src/port/dirent.c @@ -0,0 +1,137 @@ +/*------------------------------------------------------------------------- + * + * dirent.c + * opendir/readdir/closedir for win32/msvc + * + * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group + * Portions Copyright (c) 1994, Regents of the University of California + * + * + * IDENTIFICATION + * src/port/dirent.c + * + *------------------------------------------------------------------------- + */ + +#ifndef FRONTEND +#include "postgres.h" +#else +#include "postgres_fe.h" +#endif + +#include + + +struct DIR +{ + char *dirname; + struct dirent ret; /* Used to return to caller */ + HANDLE handle; +}; + +DIR * +opendir(const char *dirname) +{ + DWORD attr; + DIR *d; + + /* Make sure it is a directory */ + attr = GetFileAttributes(dirname); + if (attr == INVALID_FILE_ATTRIBUTES) + { + errno = ENOENT; + return NULL; + } + if ((attr & FILE_ATTRIBUTE_DIRECTORY) != FILE_ATTRIBUTE_DIRECTORY) + { + errno = ENOTDIR; + return NULL; + } + + d = malloc(sizeof(DIR)); + if (!d) + { + errno = ENOMEM; + return NULL; + } + d->dirname = malloc(strlen(dirname) + 4); + if (!d->dirname) + { + errno = ENOMEM; + free(d); + return NULL; + } + strcpy(d->dirname, dirname); + if (d->dirname[strlen(d->dirname) - 1] != '/' && + d->dirname[strlen(d->dirname) - 1] != '\\') + strcat(d->dirname, "\\"); /* Append backslash if not already there */ + strcat(d->dirname, "*"); /* Search for entries named anything */ + d->handle = INVALID_HANDLE_VALUE; + d->ret.d_ino = 0; /* no inodes on win32 */ + d->ret.d_reclen = 0; /* not used on win32 */ + d->ret.d_type = DT_UNKNOWN; + + return d; +} + +struct dirent * +readdir(DIR *d) +{ + WIN32_FIND_DATA fd; + + if (d->handle == INVALID_HANDLE_VALUE) + { + d->handle = FindFirstFile(d->dirname, &fd); + if (d->handle == INVALID_HANDLE_VALUE) + { + /* If there are no files, force errno=0 (unlike mingw) */ + if (GetLastError() == ERROR_FILE_NOT_FOUND) + errno = 0; + else + _dosmaperr(GetLastError()); + return NULL; + } + } + else + { + if (!FindNextFile(d->handle, &fd)) + { + /* If there are no more files, force errno=0 (like mingw) */ + if (GetLastError() == ERROR_NO_MORE_FILES) + errno = 0; + else + _dosmaperr(GetLastError()); + return NULL; + } + } + strcpy(d->ret.d_name, fd.cFileName); /* Both strings are MAX_PATH long */ + d->ret.d_namlen = strlen(d->ret.d_name); + + /* + * For reparse points dwReserved0 field will contain the ReparseTag. We + * check this first, because reparse points are also reported as + * directories. + */ + if ((fd.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) != 0 && + (fd.dwReserved0 == IO_REPARSE_TAG_MOUNT_POINT)) + d->ret.d_type = DT_LNK; + else if ((fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0) + d->ret.d_type = DT_DIR; + else + d->ret.d_type = DT_REG; + + return &d->ret; +} + +int +closedir(DIR *d) +{ + int ret = 0; + + if (d->handle != INVALID_HANDLE_VALUE) + ret = !FindClose(d->handle); + free(d->dirname); + free(d); + + return ret; +} -- cgit v1.2.3