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ede479967f
This takes another small step towards disentangling the build system from the old AT&T environment. The USAGE_LICENSE macros with author and copyright information, which was formerly generated dynamically for each file from a database, are eliminated and the copyright/author information is instead inserted into the AST getopt usage strings directly. Repetitive license/copyright information is also removed from the getopt strings in the builtin commands (src/lib/libcmd/*.c and src/cmd/ksh93/data/builtins.c). There's no need to include 55 identical license/copyright strings in the ksh binary; one (in the main ksh getopt string, shown by ksh --man) ought to be enough! This makes the ksh binary about 10k smaller. It does mean that something like 'enum --author', 'typeset --license' or 'shift --copyright' will now not show those notices for those builtins, but I doubt anyone will care.
79 lines
3 KiB
C
79 lines
3 KiB
C
/***********************************************************************
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* *
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* This software is part of the ast package *
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* Copyright (c) 1992-2012 AT&T Intellectual Property *
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* and is licensed under the *
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* Eclipse Public License, Version 1.0 *
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* by AT&T Intellectual Property *
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* *
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* A copy of the License is available at *
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* http://www.eclipse.org/org/documents/epl-v10.html *
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* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
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* *
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* Information and Software Systems Research *
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* AT&T Research *
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* Florham Park NJ *
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* *
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* Glenn Fowler <gsf@research.att.com> *
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* David Korn <dgk@research.att.com> *
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* *
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***********************************************************************/
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#pragma prototyped
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/*
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* David Korn
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* Glenn Fowler
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* AT&T Research
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*/
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static const char usage[] =
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"[-?\n@(#)$Id: sync (AT&T Research) 2006-10-04 $\n]"
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"[--catalog?" ERROR_CATALOG "]"
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"[+NAME?sync - schedule file system updates]"
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"[+DESCRIPTION?\bsync\b calls \bsync\b(2), which causes all information "
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"in memory that updates file systems to be scheduled for writing out to "
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"all file systems. The writing, although scheduled, is not necessarily "
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"complete upon return from \bsync\b.]"
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"[+?Since \bsync\b(2) has no failure indication, \bsync\b only fails for "
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"option/operand syntax errors, or when \bsync\b(2) does not return, in "
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"which case \bsync\b also does not return.]"
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"[+?At minimum \bsync\b should be called before halting the system. Most "
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"systems provide graceful shutdown procedures that include \bsync\b -- "
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"use them if possible.]"
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"[+EXIT STATUS?]"
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"{"
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"[+0?\bsync\b(2) returned.]"
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"[+>0?Option/operand syntax error.]"
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"}"
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"[+SEE ALSO?\bsync\b(2), \bshutdown\b(8)]"
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;
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#include <cmd.h>
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#include <ls.h>
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int
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b_sync(int argc, char** argv, Shbltin_t* context)
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{
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cmdinit(argc, argv, context, ERROR_CATALOG, 0);
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for (;;)
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{
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switch (optget(argv, usage))
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{
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case ':':
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error(2, "%s", opt_info.arg);
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break;
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case '?':
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error(ERROR_usage(2), "%s", opt_info.arg);
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break;
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}
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break;
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}
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argv += opt_info.index;
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if (error_info.errors || *argv)
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error(ERROR_usage(2), "%s", optusage(NiL));
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#if _lib_sync
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sync();
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#else
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error(ERROR_usage(2), "failed -- the native system does not provide a sync(2) call");
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#endif
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return 0;
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}
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