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/* $Id: sleep.c 2243 2009-01-10 02:24:02Z bird $ */
/** @file
* kmk_sleep - suspend execution for an interval of time.
*/
/*
* Copyright (c) 2008-2009 knut st. osmundsen <bird-kBuild-spamix@anduin.net>
*
* This file is part of kBuild.
*
* kBuild is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* kBuild is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with kBuild. If not, see <http://www.gnu.org/licenses/>
*
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#if defined(_MSC_VER)
# include <Windows.h>
#else
# include <unistd.h>
# include <time.h>
#endif
#include "../kmkbuiltin.h"
static const char *name(const char *pszName)
{
const char *psz = strrchr(pszName, '/');
#if defined(_MSC_VER) || defined(__OS2__)
const char *psz2 = strrchr(pszName, '\\');
if (!psz2)
psz2 = strrchr(pszName, ':');
if (psz2 && (!psz || psz2 > psz))
psz = psz2;
#endif
return psz ? psz + 1 : pszName;
}
static int usage(FILE *pOut, const char *argv0)
{
argv0 = name(argv0);
fprintf(pOut,
"usage: %s <seconds>[s]\n"
" or: %s <milliseconds>ms\n"
" or: %s <minutes>m\n"
" or: %s <hours>h\n"
" or: %s <days>d\n"
" or: %s --help\n"
" or: %s --version\n"
"\n"
"Only integer values are accepted.\n"
,
argv0, argv0, argv0, argv0, argv0, argv0, argv0);
return 1;
}
int kmk_builtin_sleep(int argc, char **argv, char **envp)
{
long cMsToSleep;
long lTmp;
unsigned long ulFactor;
char *pszInterval;
char *pszSuff;
/*
* Parse arguments.
*/
if (argc != 2)
return usage(stderr, argv[0]);
/* help request */
if ( !strcmp(argv[1], "-h")
|| !strcmp(argv[1], "-?")
|| !strcmp(argv[1], "-H")
|| !strcmp(argv[1], "--help"))
{
usage(stdout, argv[0]);
return 0;
}
/* version request */
if ( !strcmp(argv[1], "-V")
|| !strcmp(argv[1], "--version"))
{
printf("kmk_sleep - kBuild version %d.%d.%d (r%u)\n"
"Copyright (c) 2008-2009 knut st. osmundsen\n",
KBUILD_VERSION_MAJOR, KBUILD_VERSION_MINOR, KBUILD_VERSION_PATCH,
KBUILD_SVN_REV);
return 0;
}
/*
* Try convert the argument to a time period.
* Allow spaces before, between and after the different parts.
*/
pszInterval = argv[1];
while (isspace(*pszInterval))
pszInterval++;
cMsToSleep = strtol(pszInterval, &pszSuff, 0);
if (pszSuff == pszInterval)
{
fprintf(stderr, "%s: malformed interval '%s'!\n", name(argv[0]), pszInterval);
return 1;
}
while (isspace(*pszSuff))
pszSuff++;
if (!*pszSuff)
ulFactor = 1000; /* s */
else
{
/* find the suffix length and check that it's only white space following it. */
int cchSuff;
int i = 1;
while (pszSuff[i] && !isspace(pszSuff[i]))
i++;
cchSuff = i;
while (pszSuff[i])
{
if (!isspace(pszSuff[i]))
{
fprintf(stderr, "%s: malformed interval '%s'!\n", name(argv[0]), pszInterval);
return 1;
}
i++;
}
if (cchSuff == 2 && !strncmp (pszSuff, "ms", 2))
ulFactor = 1;
else if (cchSuff == 1 && *pszSuff == 's')
ulFactor = 1000;
else if (cchSuff == 1 && *pszSuff == 'm')
ulFactor = 60*1000;
else if (cchSuff == 1 && *pszSuff == 'h')
ulFactor = 60*60*1000;
else if (cchSuff == 1 && *pszSuff == 'd')
ulFactor = 24*60*60*1000;
else
{
fprintf(stderr, "%s: unknown suffix '%.*s'!\n", name(argv[0]), cchSuff, pszSuff);
return 1;
}
}
lTmp = cMsToSleep;
cMsToSleep *= ulFactor;
if ((cMsToSleep / ulFactor) != (unsigned long)lTmp)
{
fprintf(stderr, "%s: time interval overflow!\n", name(argv[0]));
return 1;
}
/*
* Do the actual sleeping.
*/
if (cMsToSleep > 0)
{
#if defined(_MSC_VER)
Sleep(cMsToSleep);
#else
if (cMsToSleep)
{
struct timespec TimeSpec;
TimeSpec.tv_nsec = (cMsToSleep % 1000) * 1000000;
TimeSpec.tv_sec = cMsToSleep / 1000;
nanosleep(&TimeSpec, NULL);
}
#endif
}
return 0;
}
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