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2963a9f794
this change hardens the dynamic linker against the possibility of loading the wrong library due to inability to expand $ORIGIN in rpath. hard failures such as excessively long paths or absence of /proc (when resolving /proc/self/exe for the main executable's origin) do not stop the path search, but memory allocation failures and any other potentially transient failures do. to implement this change, the meaning of the return value of fixup_rpath function is changed. returning zero no longer indicates that the dso's rpath string pointer is non-null; instead, the caller needs to check. a return value of -1 indicates a failure that should stop further path search.
musl libc
musl, pronounced like the word "mussel", is an MIT-licensed
implementation of the standard C library targetting the Linux syscall
API, suitable for use in a wide range of deployment environments. musl
offers efficient static and dynamic linking support, lightweight code
and low runtime overhead, strong fail-safe guarantees under correct
usage, and correctness in the sense of standards conformance and
safety. musl is built on the principle that these goals are best
achieved through simple code that is easy to understand and maintain.
The 1.1 release series for musl features coverage for all interfaces
defined in ISO C99 and POSIX 2008 base, along with a number of
non-standardized interfaces for compatibility with Linux, BSD, and
glibc functionality.
For basic installation instructions, see the included INSTALL file.
Information on full musl-targeted compiler toolchains, system
bootstrapping, and Linux distributions built on musl can be found on
the project website:
http://www.musl-libc.org/