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POSIX allows sysconf(_SC_GETPW_R_SIZE_MAX) to return -1 if there is no fixed limit, and requires ERANGE errors to track real size. Model our behavior after the example in POSIX itself: http://pubs.opengroup.org/onlinepubs/9699919799/functions/getpwuid_r.html Also, on error for get*_r functions, errno is undefined, and the real error was the return value. * src/util/util.c (virGetUserEnt, virGetUserID, virGetGroupID) (virSetUIDGID): Cope with sysconf failure or too small buffer. Reported by Matthias Bolte.
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>