util: try to be a bit more NFS compatible when checking whether an FS is writable
https://bugs.freedesktop.org/show_bug.cgi?id=81169
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@ -533,7 +533,16 @@ int path_is_read_only_fs(const char *path) {
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if (statvfs(path, &st) < 0)
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return -errno;
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return !!(st.f_flag & ST_RDONLY);
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if (st.f_flag & ST_RDONLY)
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return true;
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/* On NFS, statvfs() might not reflect whether we can actually
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* write to the remote share. Let's try again with
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* access(W_OK) which is more reliable, at least sometimes. */
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if (access(path, W_OK) < 0 && errno == EROFS)
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return true;
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return false;
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}
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int path_is_os_tree(const char *path) {
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