To see the man page, open a UNIX shell and type man 5 signal.

Add 128 to the man page's Value numbers to get the exit code numbers. For example, if you see the error message:

rendering error: exited with error code 139

The value is 11 + 128 which equals 139. On the man page, 11 is a Segmentation Fault (SIGSEGV). See the following example of a man page file:

Name	Value	Default	Event
SIGHUP	1	Exit	Hangup [see termio(7)]
SIGINT	2	Exit	Interrupt [see termio(7)]
SIGQUIT	3	Core	Quit [see termio(7)]
SIGILL	4	Core	Illegal Instruction
SIGTRAP	5	Core	Trace/Breakpoint Trap
SIGABRT	6	Core	Abort
SIGEMT	7	Core	Emulation Trap
SIGFPE	8	Core	Arithmetic Exception
SIGKILL	9	Exit	Killed
SIGBUS	10	Core	Bus Error
SIGSEGV	11	Core	Segmentation Fault
SIGSYS	12	Core	Bad System Call
SIGPIPE	13	Exit	Broken Pipe
SIGALRM	14	Exit	Alarm Clock
SIGTERM	15	Exit	Terminated
SIGUSR1	16	Exit	User Signal 1
SIGUSR2	17	Exit	User Signal 2
SIGCHLD	18	Ignore	Child Status Changed
SIGPWR	19	Ignore	Power Fail/Restart
SIGWINCH	20	Ignore	Window Size Change
SIGURG	21	Ignore	Urgent Socket Condition
SIGPOLL	22	Ignore	Pollable Event [see streamio(7)]
SIGSTOP	23	Stop	Stopped (signal)
SIGTSTP	24	Stop	Stopped (user) [see termio(7)]
SIGCONT	25	Ignore	Continued
SIGTTIN	26	Stop	Stopped (tty input) [see termio(7)]
SIGTTOU	27	Stop	Stopped (tty output) [see termio(7)]
SIGVTALRM	28	Exit	Virtual Timer Expired
SIGPROF	29	Exit	Profiling Timer Expired
SIGXCPU	30	Core	CPU time limit exceeded [see getrlimit(2)]
SIGXFSZ	31	Core	File size limit exceeded [see getrlimit(2)]
SIGRTMIN	49	Exit	Posix.4 SIGRTMIN
SIGRTMAX	64	Exit	Posix.4 SIGRTMAX