On 12/24/2010 02:41 PM, Bruno Haible wrote: > Hi, > > How can some library code determine the name of the running program, > for error message and display purposes, if the program's main() function > has not stored argv[0] in a particular place? > > Let's be clear about two things: > > 1) This question is mostly irrelevant for libposix, because library > functions in libposix should not call exit() and should not print > error messages. The only ways out that a library function has is > to call abort() if there was a programming error, and to return > an error code or error message that the caller can then handle. > > 2) Even if we find an answer to this question, it does not magically > resolve all problems with the 'error' module, because the question > remains where the 'program_name' variable shall be allocated, > and it is a portability problem for MacOS X, AIX, Solaris, Cygwin [1].
FYI - cygwin 1.7.8 (probably being released in January) just added support for program_invocation_name and program_invocation_short_name, in order to be more like glibc: http://cygwin.com/ml/cygwin-cvs/2010-q4/msg00047.html -- Eric Blake ebl...@redhat.com +1-801-349-2682 Libvirt virtualization library http://libvirt.org
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