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cde/src/lib/libcmd/sync.c
Martijn Dekker ede479967f resolve/remove USAGE_LICENSE macros; remove repetitive (c) strings
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.
2021-01-31 11:00:49 +00:00

79 lines
3 KiB
C

/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1992-2012 AT&T Intellectual Property *
* and is licensed under the *
* Eclipse Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.eclipse.org/org/documents/epl-v10.html *
* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* David Korn
* Glenn Fowler
* AT&T Research
*/
static const char usage[] =
"[-?\n@(#)$Id: sync (AT&T Research) 2006-10-04 $\n]"
"[--catalog?" ERROR_CATALOG "]"
"[+NAME?sync - schedule file system updates]"
"[+DESCRIPTION?\bsync\b calls \bsync\b(2), which causes all information "
"in memory that updates file systems to be scheduled for writing out to "
"all file systems. The writing, although scheduled, is not necessarily "
"complete upon return from \bsync\b.]"
"[+?Since \bsync\b(2) has no failure indication, \bsync\b only fails for "
"option/operand syntax errors, or when \bsync\b(2) does not return, in "
"which case \bsync\b also does not return.]"
"[+?At minimum \bsync\b should be called before halting the system. Most "
"systems provide graceful shutdown procedures that include \bsync\b -- "
"use them if possible.]"
"[+EXIT STATUS?]"
"{"
"[+0?\bsync\b(2) returned.]"
"[+>0?Option/operand syntax error.]"
"}"
"[+SEE ALSO?\bsync\b(2), \bshutdown\b(8)]"
;
#include <cmd.h>
#include <ls.h>
int
b_sync(int argc, char** argv, Shbltin_t* context)
{
cmdinit(argc, argv, context, ERROR_CATALOG, 0);
for (;;)
{
switch (optget(argv, usage))
{
case ':':
error(2, "%s", opt_info.arg);
break;
case '?':
error(ERROR_usage(2), "%s", opt_info.arg);
break;
}
break;
}
argv += opt_info.index;
if (error_info.errors || *argv)
error(ERROR_usage(2), "%s", optusage(NiL));
#if _lib_sync
sync();
#else
error(ERROR_usage(2), "failed -- the native system does not provide a sync(2) call");
#endif
return 0;
}