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Use bb_getopt_ulflags, marginal saving, better argument checking.

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This commit is contained in:
Glenn L McGrath 2004-02-22 09:11:33 +00:00
parent f461e0123d
commit 689e4b9531
1 changed files with 41 additions and 68 deletions
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109
util-linux/hwclock.c
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@ -21,19 +21,19 @@
*/
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/utsname.h>
#include <stdlib.h>
#include <unistd.h>
#include <syslog.h>
#include <string.h>
#include <ctype.h>
#include <fcntl.h>
#include <sys/time.h>
#include <getopt.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <time.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include "busybox.h"
/* Copied from linux/rtc.h to eliminate the kernel dependancy */
struct linux_rtc_time {
int tm_sec;
@ -47,28 +47,16 @@ struct linux_rtc_time {
int tm_isdst;
};
#define RTC_SET_TIME _IOW('p', 0x0a, struct linux_rtc_time) /* Set RTC time */
#define RTC_RD_TIME _IOR('p', 0x09, struct linux_rtc_time) /* Read RTC time */
#ifdef CONFIG_FEATURE_HWCLOCK_LONGOPTIONS
# ifndef _GNU_SOURCE
# define _GNU_SOURCE
# endif
#endif
#include <getopt.h>
enum OpMode {
SHOW,
SYSTOHC,
HCTOSYS
};
time_t read_rtc ( int utc )
static time_t read_rtc(int utc)
{
int rtc;
struct tm tm;
@ -104,7 +92,7 @@ time_t read_rtc ( int utc )
return t;
}
void write_rtc ( time_t t, int utc )
static void write_rtc(time_t t, int utc)
{
int rtc;
struct tm tm;
@ -123,7 +111,7 @@ void write_rtc ( time_t t, int utc )
close ( rtc );
}
int show_clock ( int utc )
static int show_clock(int utc)
{
struct tm *ptm;
time_t t;
@ -142,7 +130,7 @@ int show_clock ( int utc )
return 0;
}
int to_sys_clock ( int utc )
static int to_sys_clock(int utc)
{
struct timeval tv = { 0, 0 };
const struct timezone tz = { timezone/60 - 60*daylight, 0 };
@ -155,7 +143,7 @@ int to_sys_clock ( int utc )
return 0;
}
int from_sys_clock ( int utc )
static int from_sys_clock(int utc)
{
struct timeval tv = { 0, 0 };
struct timezone tz = { 0, 0 };
@ -168,7 +156,7 @@ int from_sys_clock ( int utc )
}
int check_utc ( void )
static int check_utc(void)
{
int utc = 0;
FILE *f = fopen ( "/var/lib/hwclock/adjtime", "r" );
@ -194,63 +182,48 @@ int check_utc ( void )
return utc;
}
#define HWCLOCK_OPT_LOCALTIME 1
#define HWCLOCK_OPT_UTC 8
#define HWCLOCK_OPT_SHOW 2
#define HWCLOCK_OPT_HCTOSYS 4
#define HWCLOCK_OPT_SYSTOHC 16
extern int hwclock_main ( int argc, char **argv )
{
int opt;
enum OpMode mode = SHOW;
unsigned long opt;
int utc = 0;
int utc_arg = 0;
#ifdef CONFIG_FEATURE_HWCLOCK_LONGOPTIONS
struct option long_options[] = {
{ "show", 0, 0, 'r' },
{ "utc", 0, 0, 'u' },
static const struct option hwclock_long_options[] = {
{ "localtime", 0, 0, 'l' },
{ "utc", 0, 0, 'u' },
{ "show", 0, 0, 'r' },
{ "hctosys", 0, 0, 's' },
{ "systohc", 0, 0, 'w' },
{ 0, 0, 0, 0 }
};
while (( opt = getopt_long ( argc, argv, "rwsul", long_options, 0 )) != EOF ) {
#else
while (( opt = getopt ( argc, argv, "rwsul" )) != EOF ) {
bb_applet_long_options = hwclock_long_options;
#endif
switch ( opt ) {
case 'r':
mode = SHOW;
break;
case 'w':
mode = SYSTOHC;
break;
case 's':
mode = HCTOSYS;
break;
case 'u':
utc = 1;
utc_arg = 1;
break;
case 'l': // -l is not supported by the normal hwclock (only --localtime)
utc = 0;
utc_arg = 1;
break;
default:
bb_show_usage();
break;
}
bb_opt_complementaly = "r~ws:w~rs:s~wr";
opt = bb_getopt_ulflags(argc, argv, "lursw");
/* Check only one mode was given */
if(opt & 0x80000000UL) {
bb_show_usage();
}
if ( !utc_arg )
utc = check_utc ( );
switch ( mode ) {
case SYSTOHC:
return from_sys_clock ( utc );
/* If -u or -l wasnt give check if we are using utc */
if ((opt & (HWCLOCK_OPT_UTC | HWCLOCK_OPT_LOCALTIME)) == 0) {
utc = check_utc();
}
case HCTOSYS:
if (opt & HWCLOCK_OPT_HCTOSYS) {
return to_sys_clock ( utc );
case SHOW:
default:
}
else if (opt & HWCLOCK_OPT_SYSTOHC) {
return from_sys_clock ( utc );
} else {
/* default HWCLOCK_OPT_SHOW */
return show_clock ( utc );
}
}
}