This is an example of the errinfo program, which prints details on syscall

failures.

By default it "snoops" syscall failures and prints their details,

# ./errinfo

EXEC SYSCALL ERR DESC

wnck-applet read 11 Resource temporarily unavailable

Xorg read 11 Resource temporarily unavailable

nautilus read 11 Resource temporarily unavailable

Xorg read 11 Resource temporarily unavailable

dsdm read 11 Resource temporarily unavailable

Xorg read 11 Resource temporarily unavailable

Xorg pollsys 4 interrupted system call

mozilla-bin lwp_park 62 timer expired

gnome-netstatus- ioctl 12 Not enough core

mozilla-bin lwp_park 62 timer expired

Xorg read 11 Resource temporarily unavailable

mozilla-bin lwp_park 62 timer expired

[...]

which is useful to see these events live, but can scroll off the screen

somewhat rapidly.. so,

The "-c" option will count the number of errors. Hit Ctrl-C to stop the

sample. For example,

# ./errinfo -c

Tracing... Hit Ctrl-C to end.

^C

EXEC SYSCALL ERR COUNT DESC

nscd fcntl 22 1 Invalid argument

xscreensaver read 11 1 Resource temporarily unavailable

inetd lwp_park 62 1 timer expired

svc.startd lwp_park 62 1 timer expired

svc.configd lwp_park 62 1 timer expired

ttymon ioctl 25 1 Inappropriate ioctl for device

gnome-netstatus- ioctl 12 2 Not enough core

mozilla-bin lwp_kill 3 2 No such process

mozilla-bin connect 150 5 operation now in progress

svc.startd portfs 62 8 timer expired

java_vm lwp_cond_wait 62 8 timer expired

soffice.bin read 11 9 Resource temporarily unavailable

gnome-terminal read 11 23 Resource temporarily unavailable

mozilla-bin recv 11 26 Resource temporarily unavailable

nautilus read 11 26 Resource temporarily unavailable

gnome-settings-d read 11 26 Resource temporarily unavailable

gnome-smproxy read 11 34 Resource temporarily unavailable

gnome-panel read 11 42 Resource temporarily unavailable

dsdm read 11 112 Resource temporarily unavailable

metacity read 11 128 Resource temporarily unavailable

mozilla-bin lwp_park 62 133 timer expired

Xorg pollsys 4 147 interrupted system call

wnck-applet read 11 179 Resource temporarily unavailable

mozilla-bin read 11 258 Resource temporarily unavailable

Xorg read 11 1707 Resource temporarily unavailable

Ok, so Xorg has received 1707 of the same type of error for the syscall read().

The "-n" option lets us match on one type of process only. In the following

we match processes that have the name "mozilla-bin",

# ./errinfo -c -n mozilla-bin

Tracing... Hit Ctrl-C to end.

^C

EXEC SYSCALL ERR COUNT DESC

mozilla-bin getpeername 134 1 Socket is not connected

mozilla-bin recv 11 2 Resource temporarily unavailable

mozilla-bin lwp_kill 3 2 No such process

mozilla-bin connect 150 5 operation now in progress

mozilla-bin lwp_park 62 207 timer expired

mozilla-bin read 11 396 Resource temporarily unavailable

The "-p" option lets us examine one PID only. The following example examines

PID 1119,

# ./errinfo -c -p 1119

Tracing... Hit Ctrl-C to end.

^C

EXEC SYSCALL ERR COUNT DESC

Xorg pollsys 4 47 interrupted system call

Xorg read 11 669 Resource temporarily unavailable