mirror of
https://github.com/checkpoint-restore/criu
synced 2025-08-22 01:51:51 +00:00
0194ed392f
Brought to you by codespell -w (using codespell v2.1.0). Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
72 lines
1.5 KiB
C
72 lines
1.5 KiB
C
#include <string.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include "int.h"
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#include "mount.h"
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#include "path.h"
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#include "log.h"
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#include "util.h"
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#include "common/bug.h"
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char *cut_root_for_bind(char *target_root, char *source_root)
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{
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int tok = 0;
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char *path = NULL;
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/*
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* Cut common part of root.
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* For non-root binds the source is always "/" (checked)
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* so this will result in this slash removal only.
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*/
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while (target_root[tok] == source_root[tok]) {
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tok++;
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if (source_root[tok] == '\0') {
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path = target_root + tok;
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goto out;
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}
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if (target_root[tok] == '\0') {
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path = source_root + tok;
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goto out;
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}
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}
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return NULL;
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out:
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BUG_ON(path == NULL);
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if (path[0] == '/')
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path++;
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return path;
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}
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char *mnt_get_sibling_path(struct mount_info *m, struct mount_info *p, char *buf, int len)
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{
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struct mount_info *pa = m->parent;
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char *rpath, fsrpath[PATH_MAX];
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if (pa == NULL)
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return NULL;
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rpath = get_relative_path(m->ns_mountpoint, pa->ns_mountpoint);
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if (!rpath) {
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pr_warn("child - parent mountpoint mismatch %s - %s\n", m->ns_mountpoint, pa->ns_mountpoint);
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return NULL;
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}
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if (snprintf(fsrpath, sizeof(fsrpath), "%s/%s", pa->root, rpath) >= sizeof(fsrpath)) {
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pr_warn("snrptintf truncation \"%s / %s\"\n", pa->root, rpath);
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return NULL;
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}
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rpath = get_relative_path(fsrpath, p->root);
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if (!rpath)
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return NULL;
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if (snprintf(buf, len, "%s/%s", p->ns_mountpoint, rpath) >= sizeof(fsrpath)) {
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pr_warn("snrptintf truncation \"%s / %s\"\n", p->ns_mountpoint, rpath);
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return NULL;
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}
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return buf;
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}
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