synchronous freebsd print
Hi, I have a quick question, and I believe this will be a common requirement. I do a print of some data and then immediately in a next statement there is a crash. But the print is not complete, before it completes there is a crash, the print is about 6-9 lines . Is there anyway to get the complete print before executing the next instruction. like putting a delay before executing the next instruction. Regards, Sanjeev. - Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: synchronous freebsd print
On Wed, Feb 27, 2008 at 12:08:28AM -0800, Sanjeev Kumar.S wrote: I have a quick question, and I believe this will be a common requirement. This is a standard C question. I do a print of some data and then immediately in a next statement there is a crash. ... Is there anyway to get the complete print before executing the next instruction. Look at fflush(3) -- Peter Jeremy Please excuse any delays as the result of my ISP's inability to implement an MTA that is either RFC2821-compliant or matches their claimed behaviour. pgphQFuplx4Je.pgp Description: PGP signature
Re: synchronous freebsd print
This is a standard C question. Sorry, if this clarification is too simple, but I thought freeBSD kernel implemented its own print function. and the man for fflush says it is in the standard C-library. and the kernel source has no defn for fflush. I saw lots of kernel related questions asked in this list, so I posted my question here. Please correct me if I am wrong. and Yes in the kernel code I have a \n at the end of my print, still the print is not complete and the line next to it that causes the crash does not give the result I want. Is this a common scenario or am I doing something wrong. Sanjeev. Peter Jeremy [EMAIL PROTECTED] wrote: On Wed, Feb 27, 2008 at 12:08:28AM -0800, Sanjeev Kumar.S wrote: I have a quick question, and I believe this will be a common requirement. This is a standard C question. I do a print of some data and then immediately in a next statement there is a crash. ... Is there anyway to get the complete print before executing the next instruction. Look at fflush(3) -- Peter Jeremy Please excuse any delays as the result of my ISP's inability to implement an MTA that is either RFC2821-compliant or matches their claimed behaviour. - Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: synchronous freebsd print
Sanjeev, Wed, Feb 27, 2008 at 03:00:46AM -0800, Sanjeev Kumar.S wrote: and Yes in the kernel code I have a \n at the end of my print, still the print is not complete and the line next to it that causes the crash does not give the result I want. Is this a common scenario or am I doing something wrong. If you're not defining PRINTF_BUFR_SIZE, then, judging by the /sys/kern/subr_prf.c, output will be unbuffered in any case. However, kernel printf is not protected by locks, so it can be interrupted by another thread, if I am correct. May be ddb(4) will become your friend? -- Eygene ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: synchronous freebsd print
Use fprintf(stderr, ...) instead, as stderr is unbuffered by default. James Toothman About.com Peter Jeremy wrote: On Wed, Feb 27, 2008 at 12:08:28AM -0800, Sanjeev Kumar.S wrote: I have a quick question, and I believe this will be a common requirement. This is a standard C question. I do a print of some data and then immediately in a next statement there is a crash. ... Is there anyway to get the complete print before executing the next instruction. Look at fflush(3) ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: synchronous freebsd print
Sanjeev Kumar.S wrote: Hi, I have a quick question, and I believe this will be a common requirement. I do a print of some data and then immediately in a next statement there is a crash. But the print is not complete, before it completes there is a crash, the print is about 6-9 lines . Is there anyway to get the complete print before executing the next instruction. like putting a delay before executing the next instruction. in the kernel or in a program? Regards, Sanjeev. - Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
