Re: Unix System Services - strace
The sysomvs ctrace data is written to OMVS dataspaces (z/OS 2.4 and below) or to 64-bit storage (above the bar) at z/OS 2.5 OR to dataset(s) defined for an external writer. If not using an external writer, you must capture an SVC dump of OMVS+dataspaces. In either case - SVC dump or dataset from external writer - you must then use IPCS to format the ctrace. (aplogies for not mentioning this in the prior post) IPCS option 2.7.1 provides a panel to build the command to format the ctrace. Command line (IPCS option 6) would bectrace comp(sysomvs) local full options((kerninfo)) -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Unix System Services - strace
I was able to run a trace: TRACE CT,ON,COMP=SYSOMVS *05 ITT006A SPECIFY OPERAND(S) FOR TRACE CT COMMAND. R 5,OPTIONS=(SYSCALL,FILE),END IEE600I REPLY TO 05 IS;OPTIONS=(SYSCALL,FILE),END ITT038I ALL OF THE TRANSACTIONS REQUESTED VIA THE TRACE CT COMMAND WERE SUCCESSFULLY EXECUTED. Ran the command on my OVMS session and then ended the trace: TRACE CT,OFF,COMP=SYSOMVS ITT038I ALL OF THE TRANSACTIONS REQUESTED VIA THE TRACE CT COMMAND WERE SUCCESSFULLY EXECUTED. ITT038I ALL OF THE TRANSACTIONS REQUESTED VIA THE TRACE CT COMMAND WERE SUCCESSFULLY EXECUTED. How do I run CTRACE? Neale -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Unix System Services - strace
Thanks! I’ll take a read. Detailed OMVS tracing is described here https://www.ibm.com/docs/en/zos/2.5.0?topic=trace-sysomvs-component -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Unix System Services - strace
Detailed OMVS tracing is described here https://www.ibm.com/docs/en/zos/2.5.0?topic=trace-sysomvs-component It is low-level, and will require either external writer or SVC dump of OMVS+dataspaces to capture. Options SYSCALL and FILE will capture file activity. Be aware when filtering sysomvs ctrace by jobname - The JOBNAME= parameter can be used for the SYSOMVS Ctrace to trace data just for jobs that run with the specific user ID(s) specified in the JOBNAME list. This filtering is based on the user ID of a job, not its jobname. The OMVS kernel is traced with jobname OMVS. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Unix System Services - strace
I found the bpxtrace command but while its output is full of FCN… fcntl and FCN… write they are almost the only functions generating trace records. The app is opening quite a lot of files but I see no evidence in the trace. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Unix System Services - strace
bpxtrace https://www.ibm.com/docs/en/zos/2.4.0?topic=descriptions-bpxtrace-activate-deactivate-traces-processes On Wed, May 3, 2023 at 5:11 PM Neale Ferguson wrote: > Under Linux I use the strace command to trace system calls to see, for > example, what files are trying to be opened. Is there an equivalent method > under Unix System Services? > > Neale > > -- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Unix System Services - strace
Under Linux I use the strace command to trace system calls to see, for example, what files are trying to be opened. Is there an equivalent method under Unix System Services? Neale -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
