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-rw-r--r--hwclock/kd.c234
1 files changed, 119 insertions, 115 deletions
diff --git a/hwclock/kd.c b/hwclock/kd.c
index 66ff579bb..f4957ac64 100644
--- a/hwclock/kd.c
+++ b/hwclock/kd.c
@@ -1,19 +1,21 @@
-/* kd.c - KDGHWCLK stuff, possibly m68k only - deprecated */
+/*
+ * kd.c - KDGHWCLK stuff, possibly m68k only, likely to be deprecated
+ */
#include "clock.h"
#ifdef __m68k__
-#include <unistd.h> /* for close() */
-#include <fcntl.h> /* for O_RDONLY */
-#include <sysexits.h>
-#include <sys/ioctl.h>
+# include <unistd.h> /* for close() */
+# include <fcntl.h> /* for O_RDONLY */
+# include <sysexits.h>
+# include <sys/ioctl.h>
-#include "nls.h"
-#include "usleep.h"
+# include "nls.h"
+# include "usleep.h"
/* Get defines for KDGHWCLK and KDSHWCLK (m68k) */
-#include <linux/kd.h>
+# include <linux/kd.h>
/* Even on m68k, if KDGHWCLK (antique) is not defined, don't build this */
@@ -21,124 +23,126 @@
#if !defined(__m68k__) || !defined(KDGHWCLK)
-struct clock_ops *
-probe_for_kd_clock() {
+struct clock_ops *probe_for_kd_clock()
+{
return NULL;
}
-#else /* __m68k__ && KDGHWCLK */
+#else /* __m68k__ && KDGHWCLK */
-static int con_fd = -1; /* opened by probe_for_kd_clock() */
- /* never closed */
+/* Opened by probe_for_kd_clock(), and never closed. */
+static int con_fd = -1;
static char *con_fd_filename; /* usually "/dev/tty1" */
-static int
-synchronize_to_clock_tick_kd(void) {
-/*----------------------------------------------------------------------------
- Wait for the top of a clock tick by calling KDGHWCLK in a busy loop until
- we see it.
------------------------------------------------------------------------------*/
-
- /* The time when we were called (and started waiting) */
- struct hwclk_time start_time, nowtime;
- struct timeval begin, now;
-
- if (debug)
- printf(_("Waiting in loop for time from KDGHWCLK to change\n"));
-
- if (ioctl(con_fd, KDGHWCLK, &start_time) == -1) {
- outsyserr(_("KDGHWCLK ioctl to read time failed"));
- return 3;
- }
-
- /* Wait for change. Should be within a second, but in case something
- * weird happens, we have a time limit (1.5s) on this loop to reduce the
- * impact of this failure.
- */
- gettimeofday(&begin, NULL);
- do {
- /* Added by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
- * "The culprit is the fast loop with KDGHWCLK ioctls. It seems
- * the kernel gets confused by those on Amigas with A2000 RTCs
- * and simply hangs after some time. Inserting a sleep helps."
- */
- usleep(1);
-
- if (ioctl(con_fd, KDGHWCLK, &nowtime) == -1) {
- outsyserr(_("KDGHWCLK ioctl to read time failed in loop"));
- return 3;
- }
- if (start_time.tm_sec != nowtime.tm_sec)
- break;
- gettimeofday(&now, NULL);
- if (time_diff(now, begin) > 1.5) {
- fprintf(stderr, _("Timed out waiting for time change.\n"));
- return 2;
- }
- } while(1);
-
- return 0;
+/*
+ * Wait for the top of a clock tick by calling KDGHWCLK in a busy loop until
+ * we see it.
+ */
+static int synchronize_to_clock_tick_kd(void)
+{
+ /* The time when we were called (and started waiting) */
+ struct hwclk_time start_time, nowtime;
+ struct timeval begin, now;
+
+ if (debug)
+ printf(_("Waiting in loop for time from KDGHWCLK to change\n"));
+
+ if (ioctl(con_fd, KDGHWCLK, &start_time) == -1) {
+ outsyserr(_("KDGHWCLK ioctl to read time failed"));
+ return 3;
+ }
+
+ /*
+ * Wait for change. Should be within a second, but in case something
+ * weird happens, we have a time limit (1.5s) on this loop to reduce
+ * the impact of this failure.
+ */
+ gettimeofday(&begin, NULL);
+ do {
+ /*
+ * Added by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+ *
+ * "The culprit is the fast loop with KDGHWCLK ioctls. It
+ * seems the kernel gets confused by those on Amigas with
+ * A2000 RTCs and simply hangs after some time. Inserting a
+ * sleep helps."
+ */
+ usleep(1);
+
+ if (ioctl(con_fd, KDGHWCLK, &nowtime) == -1) {
+ outsyserr(_
+ ("KDGHWCLK ioctl to read time failed in loop"));
+ return 3;
+ }
+ if (start_time.tm_sec != nowtime.tm_sec)
+ break;
+ gettimeofday(&now, NULL);
+ if (time_diff(now, begin) > 1.5) {
+ fprintf(stderr,
+ _("Timed out waiting for time change.\n"));
+ return 2;
+ }
+ } while (1);
+
+ return 0;
}
+/*
+ * Read the hardware clock and return the current time via <tm> argument.
+ * Use ioctls to /dev/tty1 on what we assume is an m68k machine.
+ *
+ * Note that we don't use /dev/console here. That might be a serial console.
+ */
+static int read_hardware_clock_kd(struct tm *tm)
+{
+ struct hwclk_time t;
+
+ if (ioctl(con_fd, KDGHWCLK, &t) == -1) {
+ outsyserr(_("ioctl() failed to read time from %s"),
+ con_fd_filename);
+ hwclock_exit(EX_IOERR);
+ }
+
+ tm->tm_sec = t.sec;
+ tm->tm_min = t.min;
+ tm->tm_hour = t.hour;
+ tm->tm_mday = t.day;
+ tm->tm_mon = t.mon;
+ tm->tm_year = t.year;
+ tm->tm_wday = t.wday;
+ tm->tm_isdst = -1; /* Don't know if it's Daylight Savings Time */
-static int
-read_hardware_clock_kd(struct tm *tm) {
-/*----------------------------------------------------------------------------
- Read the hardware clock and return the current time via <tm>
- argument. Use ioctls to /dev/tty1 on what we assume is an m68k
- machine.
-
- Note that we don't use /dev/console here. That might be a serial
- console.
------------------------------------------------------------------------------*/
- struct hwclk_time t;
-
- if (ioctl(con_fd, KDGHWCLK, &t) == -1) {
- outsyserr(_("ioctl() failed to read time from %s"), con_fd_filename);
- hwclock_exit(EX_IOERR);
- }
-
- tm->tm_sec = t.sec;
- tm->tm_min = t.min;
- tm->tm_hour = t.hour;
- tm->tm_mday = t.day;
- tm->tm_mon = t.mon;
- tm->tm_year = t.year;
- tm->tm_wday = t.wday;
- tm->tm_isdst = -1; /* Don't know if it's Daylight Savings Time */
-
- return 0;
+ return 0;
}
+/*
+ * Set the Hardware Clock to the time <new_broken_time>. Use ioctls to
+ * /dev/tty1 on what we assume is an m68k machine.
+ *
+ * Note that we don't use /dev/console here. That might be a serial console.
+ */
+static int set_hardware_clock_kd(const struct tm *new_broken_time)
+{
+ struct hwclk_time t;
-static int
-set_hardware_clock_kd(const struct tm *new_broken_time) {
-/*----------------------------------------------------------------------------
- Set the Hardware Clock to the time <new_broken_time>. Use ioctls to
- /dev/tty1 on what we assume is an m68k machine.
-
- Note that we don't use /dev/console here. That might be a serial console.
-----------------------------------------------------------------------------*/
- struct hwclk_time t;
-
- t.sec = new_broken_time->tm_sec;
- t.min = new_broken_time->tm_min;
- t.hour = new_broken_time->tm_hour;
- t.day = new_broken_time->tm_mday;
- t.mon = new_broken_time->tm_mon;
- t.year = new_broken_time->tm_year;
- t.wday = new_broken_time->tm_wday;
-
- if (ioctl(con_fd, KDSHWCLK, &t ) == -1) {
- outsyserr(_("ioctl KDSHWCLK failed"));
- hwclock_exit(1);
- }
- return 0;
+ t.sec = new_broken_time->tm_sec;
+ t.min = new_broken_time->tm_min;
+ t.hour = new_broken_time->tm_hour;
+ t.day = new_broken_time->tm_mday;
+ t.mon = new_broken_time->tm_mon;
+ t.year = new_broken_time->tm_year;
+ t.wday = new_broken_time->tm_wday;
+
+ if (ioctl(con_fd, KDSHWCLK, &t) == -1) {
+ outsyserr(_("ioctl KDSHWCLK failed"));
+ hwclock_exit(1);
+ }
+ return 0;
}
-static int
-get_permissions_kd(void) {
- return 0;
+static int get_permissions_kd(void)
+{
+ return 0;
}
static struct clock_ops kd = {
@@ -150,8 +154,8 @@ static struct clock_ops kd = {
};
/* return &kd if KDGHWCLK works, NULL otherwise */
-struct clock_ops *
-probe_for_kd_clock() {
+struct clock_ops *probe_for_kd_clock()
+{
struct clock_ops *ret = NULL;
struct hwclk_time t;
@@ -176,4 +180,4 @@ probe_for_kd_clock() {
}
return ret;
}
-#endif /* __m68k__ && KDGHWCLK */
+#endif /* __m68k__ && KDGHWCLK */
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-12-12 09:05:05 +0100