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[cmds] Optionally show system startup time in getty #2064

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Oct 6, 2024
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[cmds] Optionally show system startup time in getty #2064

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27 changes: 24 additions & 3 deletions elkscmd/sys_utils/getty.c
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Original file line number Diff line number Diff line change
Expand Up @@ -33,8 +33,6 @@
* from the compile-time kernel rather than querying the current kernel.
* These are all works in progress.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
#include <fcntl.h>
#include <stdio.h>
Expand All @@ -47,8 +45,12 @@
#include <stdarg.h>
#include <errno.h>
#include <paths.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <linuxmt/mem.h>

#define DEBUG 0 /* set =1 for debug messages*/
#define SHOW_STARTUP 0 /* set =1 to display system startup time */

/* debug messages go here*/
#define CONSOLE _PATH_CONSOLE
Expand All @@ -64,9 +66,11 @@
#define debug(...)
#endif

#define _MK_FP(seg,off) ((void __far *)((((unsigned long)(seg)) << 16) | ((unsigned int)(off))))

char * progname;
char Buffer[64];
int ch, col = 0;
int ch, col;

void consolemsg(const char *str, ...)
{
Expand Down Expand Up @@ -206,6 +210,22 @@ static speed_t convert_baudrate(speed_t baudrate)
return 0;
}

void show_startup(void)
{
#if SHOW_STARTUP
int fd;
unsigned offset, kds;
unsigned short __far *pjiffies; /* only access low order jiffies word */

fd = open("/dev/kmem", O_RDONLY);
if (fd >= 0 && !ioctl(fd, MEM_GETDS, &kds) && !ioctl(fd, MEM_GETJIFFADDR, &offset)) {
pjiffies = _MK_FP(kds, offset);
printf("[%u.%02u secs] ", *pjiffies / 100, *pjiffies % 100);
fflush(stdout);
close(fd);
}
#endif
}

int main(int argc, char **argv)
{
Expand Down Expand Up @@ -380,6 +400,7 @@ int main(int argc, char **argv)
}


show_startup();
for (;;) {
state("login: ");
errno = 0;
Expand Down
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