GSOC: Print only failing syscalls (the opposite of -z option)

[Harsha Sharma]

Hello,

This is regarding issue #50 on github.
This is the current output of strace with '-z' option: (for ioctl_nsfs test)

ioctl(-1, NS_GET_OWNER_UID <unfinished ...>
ioctl(3, NS_GET_USERNS)                 = 5
ioctl(5, NS_GET_PARENT <unfinished ...>

Do we want to just print:

ioctl(-1, NS_GET_OWNER_UID <unfinished ...>
ioctl(5, NS_GET_PARENT <unfinished ...>


I'll like to work on this issue. Let me know if it's ok.
Thanks for your time.

Regards,
Harsha Sharma