topic Conversion problem Pl help in Operating System - Linux

Conversion problem Pl help

gopala — Thu, 19 Jul 2007 11:24:45 GMT

Hi We are converting piece of code from SUN to HP and this is old code posted below getting stuck while conversion.

clock = time(0);

cftime(system_date_day,"%d",&clock);

/* this next kludge is to prevent sccs from expanding things */
/* when letters are bracked by percent signs */

strcat(sccs_kludge,"%");
strcat(sccs_kludge,"Y");
strcat(sccs_kludge,"%");
strcat(sccs_kludge,"m");
strcat(sccs_kludge,"%");
strcat(sccs_kludge,"d");

cftime(full_date,sccs_kludge,&clock);

Hw do i convert the same above into HP, Pl help.

Thanks
Gopala

Re: Conversion problem Pl help

Peter Nikitka — Thu, 19 Jul 2007 12:37:24 GMT

Hi,

not knowing, how your variable sccs_kludge is defined + allocated, I suggest to use a
strcpy(sccs_kludge,"%");

for the first setting, then use your strcat()'s.
So no implicit NULLify of your array(?) is needed.

mfG Peter

Re: Conversion problem Pl help

Sandman! — Thu, 19 Jul 2007 14:16:48 GMT

There is no cftime under HPUX and the closest you can get to it is strftime(3C). Replacing all instances of cftime with strftime with the correct arguments should more likely do it.

Re: Conversion problem Pl help

gopala — Thu, 19 Jul 2007 14:57:57 GMT

Hi Can you please send me the new code, How it looks like same equivalent in HP, We are using this part of old Proc code and I do not even know much of it but here is the place it is failing.

I appreciate your help.

Thanks
Gopala

Re: Conversion problem Pl help

Sandman! — Thu, 19 Jul 2007 15:23:53 GMT

Code snippet below shows how to use the strftime(3C) function:

#include
#include

int main(int argc, char *argv[])
{
time_t clock;
char buf[BUFSIZ];
struct tm tmobj, *tmptr = &tmobj;
clock = time(0);
tmptr = localtime(&clock);
strftime(buf, sizeof(buf), "%a %b %d %H:%M:%S %Z %Y", tmptr);
printf("%s\n", buf);
}

Re: Conversion problem Pl help

Sandman! — Thu, 19 Jul 2007 15:31:35 GMT

The specific format string i.e. "%a %b %d %H:%M:%S %Z %Y" was used only to make the output resemble that of the date(1) command. You can change it to whatever you prefer. See the manpage of strftime(3C) for details.

~cheers

Re: Conversion problem Pl help

gopala — Fri, 20 Jul 2007 09:07:13 GMT

Hi

I highly appreciate your response.

I converted to the below and getting core dump, Pl let me know what we are doing worng, Also when we pass that varaible to other program the full_date converts to sysdate in 20070720 in that format.

time_t clock;
char system_date_day[3];
char revenue_date[7];
char full_date[9];
char sccs_kludge[7];
struct tm *time_ptr;
struct tm *time_ptr;
#ifdef DBGtrace
printf("in get_tcm\n");
#endif

/*clock = time(0);
strftime(system_date_day,3,"%d",&clock);
*/

time_ptr = gmtime(&clock);

clock = time(0);

strftime(system_date_day,3,"%d",time_ptr);

/* this next kludge is to prevent sccs from expanding things */
/* when letters are bracked by percent signs */

strcat(sccs_kludge,"%");
strcat(sccs_kludge,"Y");
strcat(sccs_kludge,"%");
strcat(sccs_kludge,"m");
strcat(sccs_kludge,"%");
strcat(sccs_kludge,"d");

strftime(full_date,9,sccs_kludge,time_ptr);

Re: Conversion problem Pl help

Sandman! — Fri, 20 Jul 2007 10:02:12 GMT

>struct tm *time_ptr;

above struct is declared twice; not sure if you meant to declare an object of that type plus a pointer to it as in:

struct tm tmobj;
struct tm *tmptr;

>time_ptr = gmtime(&clock);

>clock = time(0);

"clock" variable is initialized after extracting its value with the gmtime() function which is incorrect. Swap the two statements around:

clock=time(0);
time_ptr=gmtime(&clock);

Other than giving erroneous results it does not core dump on my PARISC system. What machine and OS are you using? Try to get a stack trace from the core file.

Re: Conversion problem Pl help

gopala — Fri, 20 Jul 2007 10:22:00 GMT

okay, At present We fixed the problem using some other way.

Yesterday we got coredump and today it ran well but without the correct data, So we put another fix to copy value into the varaible.

I appreciate your response.

Thanks
Gopala

Re: Conversion problem Pl help

Dennis Handly — Fri, 20 Jul 2007 23:29:51 GMT

As mentioned by Peter, you still haven't fixed your first strcat. This will randomly fail if there are no null chars in sccs_kludge.

In fact, you should NOT be using strcat nor strcpy. Use an array initializer:
char sccs_kludge[7] = { '%', 'Y', '%', 'm', '%', 'd' };

Instead of hardcoding 9 here: strftime(full_date,9
you should use: strftime(full_date,sizeof(full_date)