58 lines
1.1 KiB
C
58 lines
1.1 KiB
C
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/*
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* 9p utilities
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*
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* Copyright IBM, Corp. 2017
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*
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* Authors:
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* Greg Kurz <groug@kaod.org>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "9p-util.h"
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int relative_openat_nofollow(int dirfd, const char *path, int flags,
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mode_t mode)
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{
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int fd;
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fd = dup(dirfd);
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if (fd == -1) {
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return -1;
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}
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while (*path) {
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const char *c;
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int next_fd;
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char *head;
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/* Only relative paths without consecutive slashes */
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assert(path[0] != '/');
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head = g_strdup(path);
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c = strchr(path, '/');
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if (c) {
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head[c - path] = 0;
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next_fd = openat_dir(fd, head);
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} else {
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next_fd = openat_file(fd, head, flags, mode);
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}
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g_free(head);
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if (next_fd == -1) {
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close_preserve_errno(fd);
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return -1;
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}
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close(fd);
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fd = next_fd;
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if (!c) {
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break;
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}
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path = c + 1;
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}
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return fd;
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}
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