Use bb_getopt_ulflags, marginal saving, better argument checking.

diff --git a/util-linux/hwclock.c b/util-linux/hwclock.c
index 6f3411a..e62a645 100644 (file)
--- a/util-linux/hwclock.c
+++ b/util-linux/hwclock.c
@@ -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 );      
-       }       
+       }
 }