mirror of
https://github.com/libguestfs/libguestfs.git
synced 2026-03-22 07:03:38 +00:00
60e8ea0312
On riscv64:
readdir.c: In function ‘guestfs_impl_readdir’:
readdir.c:127:3: error: implicit declaration of function ‘unlink’ [-Werror=implicit-function-declaration]
127 | unlink (tmpfn);
| ^~~~~~
I also changed the #include lines to make them look a bit more
like use in other files.
134 lines
3.4 KiB
C
134 lines
3.4 KiB
C
/* libguestfs
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* Copyright (C) 2016-2022 Red Hat Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include <unistd.h>
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#include <rpc/xdr.h>
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#include "guestfs.h" /* guestfs_internal_readdir() */
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#include "guestfs_protocol.h" /* guestfs_int_dirent */
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#include "guestfs-internal.h" /* guestfs_int_make_temp_path() */
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#include "guestfs-internal-actions.h" /* guestfs_impl_readdir */
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struct guestfs_dirent_list *
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guestfs_impl_readdir (guestfs_h *g, const char *dir)
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{
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struct guestfs_dirent_list *ret;
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char *tmpfn;
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FILE *f;
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off_t fsize;
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XDR xdr;
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struct guestfs_dirent_list *dirents;
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uint32_t alloc_entries;
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size_t alloc_bytes;
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/* Prepare to fail. */
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ret = NULL;
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tmpfn = guestfs_int_make_temp_path (g, "readdir", NULL);
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if (tmpfn == NULL)
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return ret;
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if (guestfs_internal_readdir (g, dir, tmpfn) == -1)
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goto drop_tmpfile;
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f = fopen (tmpfn, "r");
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if (f == NULL) {
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perrorf (g, "fopen: %s", tmpfn);
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goto drop_tmpfile;
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}
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if (fseeko (f, 0, SEEK_END) == -1) {
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perrorf (g, "fseeko");
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goto close_tmpfile;
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}
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fsize = ftello (f);
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if (fsize == -1) {
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perrorf (g, "ftello");
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goto close_tmpfile;
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}
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if (fseeko (f, 0, SEEK_SET) == -1) {
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perrorf (g, "fseeko");
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goto close_tmpfile;
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}
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xdrstdio_create (&xdr, f, XDR_DECODE);
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dirents = safe_malloc (g, sizeof *dirents);
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dirents->len = 0;
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alloc_entries = 8;
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alloc_bytes = alloc_entries * sizeof *dirents->val;
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dirents->val = safe_malloc (g, alloc_bytes);
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while (xdr_getpos (&xdr) < fsize) {
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guestfs_int_dirent v;
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struct guestfs_dirent *d;
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if (dirents->len == alloc_entries) {
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if (alloc_entries > UINT32_MAX / 2 || alloc_bytes > (size_t)-1 / 2) {
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error (g, "integer overflow");
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goto free_dirents;
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}
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alloc_entries *= 2u;
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alloc_bytes *= 2u;
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dirents->val = safe_realloc (g, dirents->val, alloc_bytes);
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}
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/* Decoding does not work unless the target buffer is zero-initialized. */
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memset (&v, 0, sizeof v);
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if (!xdr_guestfs_int_dirent (&xdr, &v)) {
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error (g, "xdr_guestfs_int_dirent failed");
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goto free_dirents;
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}
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d = &dirents->val[dirents->len];
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d->ino = v.ino;
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d->ftyp = v.ftyp;
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d->name = v.name; /* transfer malloc'd string to "d" */
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dirents->len++;
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}
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/* Success; transfer "dirents" to "ret". */
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ret = dirents;
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dirents = NULL;
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/* Clean up. */
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xdr_destroy (&xdr);
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free_dirents:
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guestfs_free_dirent_list (dirents);
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close_tmpfile:
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fclose (f);
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drop_tmpfile:
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/* In case guestfs_internal_readdir() failed, it may or may not have created
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* the temporary file.
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*/
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unlink (tmpfn);
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free (tmpfn);
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return ret;
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}
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