POSIX, specifies the behavior.Įxamples in the wild, in this very feature: While this may not be allowed by C11/C99, it is in practice used by BSD and GNU system code, so maybe some other relevant standard, e.g.
The whole point of the question is to know if I can avoid wrappers (like the one I did for gl_closedir, whose type is clearly incompatible).I didn't initially specify DIR anywhere, but it's guaranteed to be a struct.Structs depend on their first element for alignment, so alignment requirements for a struct pointer should be the same as for void pointers, right?.If a converted pointer is used to callĪ function whose type is not compatible with the pointed-to type, the How can (void *) and (struct *) be incompatible?Ī pointer to a function of one type may be converted to a pointer to a function of another type and back again the result shall compareĮqual to the original pointer. Qualified and both shall be pointers to compatible types. Now I see similar things being done in BSD and GNU libc code, which is interesting.Īre the equivalence of these conversions a result of an implementation artifact from the compilers, or it is a fundamental restriction/property that can be inferred from the standard's specification?įor two pointer types to be compatible, both shall be identically So the following implementation should in theory work: Sections 6.2.5 (Types) and 6.7.6.3 (Function declarators (including prototypes)) of the c99 standard and the c11 standard seem to confirm this. My intuition says so they have basically the same storage/representation/alignment requirements and they should be equivalent for arguments and return type. Non-security bugs may be reported to the developers via Bugzilla or via the mailing list above. Bugs and feature requests are tracked on our Bugzilla.
#Openssh portable archive#
Portable OpenSSH development is discussed on the openssh-unix-dev mailing list ( archive mirror). Both Heimdal and MIT Kerberos implementations are supported. OpenPAM, Linux PAM and Solaris PAM are supported.Įnable Kerberos/GSSAPI support. Some of these flags will require additional libraries and/or headers be installed. configure -help but a few of the more frequently-used ones are described below.
#Openssh portable install#
prefix) are supported (and are usually required if you want to install OpenSSH).įor a full list of available flags, run. All Autoconf destination path flags (e.g. There are many build-time customisation options available. The following commands will check out and build portable OpenSSH from git: git clone # or If building from git, you'll need autoconf installed to build the configure script. If you plan on installing OpenSSH to your system, then you will usually want to specify destination paths. See the Build-time Customisation section below for configure options. Releases include a pre-built copy of the configure script and may be built using: tar zxvf In addition, certain platforms and build-time options may require additional dependencies see atform for details about your platform. Zlib is optional without it transport compression is not supported.įIDO security token support needs libfido2 and its dependencies and will be enabled automatically if they are found. OpenSSH may be built without either of these, but the resulting binaries will have only a subset of the cryptographic algorithms normally available. Libcrypto from either LibreSSL or OpenSSL may also be used. It requires a working C compiler, standard library and headers. Portable OpenSSH is built using autoconf and make. Please read the release notes for details of recent changes and potential incompatibilities. We recommend the use of a stable release for most users.
#Openssh portable download#
Stable release tarballs are available from a number of download mirrors. The official documentation for OpenSSH are the man pages for each tool: Portable OpenSSH polyfills OpenBSD APIs that are not available elsewhere, adds sshd sandboxing for more operating systems and includes support for OS-native authentication and auditing (e.g. This is a port of OpenBSD's OpenSSH to most Unix-like operating systems, including Linux, OS X and Cygwin. It includes a client ssh and server sshd, file transfer utilities scp and sftp as well as tools for key generation ( ssh-keygen), run-time key storage ( ssh-agent) and a number of supporting programs. OpenSSH is a complete implementation of the SSH protocol (version 2) for secure remote login, command execution and file transfer.
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