fs-util: make sure we output normalized paths in chase_symlinks()
Let's eat up multiple slashes. Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1787089 Replaces: #14687
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@ -797,6 +797,14 @@ int chase_symlinks(const char *path, const char *original_root, unsigned flags,
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if (r < 0)
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return r;
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/* Simplify the root directory, so that it has no duplicate slashes and nothing at the
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* end. While we won't resolve the root path we still simplify it. Note that dropping the
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* trailing slash should not change behaviour, since when opening it we specify O_DIRECTORY
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* anyway. Moreover at the end of this function after processing everything we'll always turn
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* the empty string back to "/". */
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delete_trailing_chars(root, "/");
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path_simplify(root, true);
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if (flags & CHASE_PREFIX_ROOT) {
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/* We don't support relative paths in combination with a root directory */
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if (!path_is_absolute(path))
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@ -832,11 +840,9 @@ int chase_symlinks(const char *path, const char *original_root, unsigned flags,
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"Specified path '%s' is outside of specified root directory '%s', refusing to resolve.",
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path, root);
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/* Make sure "done" ends without a slash */
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done = strdup(root);
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if (!done)
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return -ENOMEM;
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delete_trailing_chars(done, "/");
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/* Make sure "todo" starts with a slash */
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absolute = strjoin("/", e);
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@ -855,6 +861,15 @@ int chase_symlinks(const char *path, const char *original_root, unsigned flags,
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/* Determine length of first component in the path */
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n = strspn(todo, "/"); /* The slashes */
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if (n > 1) {
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/* If we are looking at more than a single slash then skip all but one, so that when
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* we are done with everything we have a normalized path with only single slashes
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* separating the path components. */
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todo += n - 1;
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n = 1;
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}
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m = n + strcspn(todo + n, "/"); /* The entire length of the component */
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/* Extract the first component. */
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@ -1010,8 +1025,6 @@ int chase_symlinks(const char *path, const char *original_root, unsigned flags,
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done = strdup(root);
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if (!done)
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return -ENOMEM;
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delete_trailing_chars(done, "/");
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}
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/* Prefix what's left to do with what we just read, and start the loop again, but
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