FYI: I have compiled a list of signals and their numbers, with brief descriptions. There may be differences in signal numbers depending on the platform. If there is only one signal number stated, then it is the same for all the platforms. The alphabetic [A-F] legends are at the bottom.
          alpha/sparc,
           i386/ppc,
             mips

SIGHUP         1       A  Hangup detected on controlling terminal
                            or death of controlling process
SIGINT         2       A  Interrupt from keyboard (Ctrl-C)
SIGQUIT        3       C  Quit from keyboard
SIGILL         4       C  Illegal Instruction
SIGTRAP        5       C  Trace/breakpoint trap
SIGABRT        6       C  Abort signal from abort
SIGBUS     10, 7,10    C  Bus error (bad memory access)
SIGFPE         8       C  Floating point exception
SIGKILL        9     AEF  Kill (cannot be caught or ignored)
SIGUSR1    30,10,16    A  User-defined signal 1
SIGSEGV       11       C  Invalid memory reference
SIGUSR2    31,12,17    A  User-defined signal 2
SIGPIPE       13       A  Broken pipe: write to pipe with no readers
SIGALRM       14       A  Timer signal from alarm
SIGTERM       15       A  Termination (termination signal from SIGKILL
+)
SIGSTKFLT   -,16, -    A  Stack fault on coprocessor
SIGCHLD    20,17,18    B  Child stopped or terminated
SIGCONT    19,18,25       Continue if stopped
SIGSTOP    17,19,23  DEF  Stop process
SIGTSTP    18,20,24    D  Stop typed at tty
SIGTTIN    21,21,26    D  tty input for background process
SIGTTOU    22,22,27    D  tty output for background process
SIGURG     16,23,21    B  Urgent condition on socket (4.2 BSD)
SIGXCPU    24,24,30    C  CPU time limit exceeded (4.2 BSD)
SIGXFSZ    25,25,31    C  File size limit exceeded (4.2 BSD)
SIGVTALRM  26,26,28    A  Virtual alarm clock (4.2 BSD)
SIGPROF    27,27,29    A  Profiling timer expired
SIGIO      23,29,22    A  I/O now possible (4.2 BSD)
SIGWINCH   28,28,20    B  Window resize signal (4.3 BSD, Sun)
SIGPWR     29,30,19    A  Power failure (System V)
SIGUNUSED   -,31, -    A  Unused signal (will be SIGSYS)

SIGCLD     -,  -,18    A  [synonym for SIGCHLD]
SIGIOT         6       C  IOT trap [synonym for SIGABRT]
SIGINFO    29, -, -    A  [synonym for SIGPWR]
SIGPOLL    23,29,22    A  Pollable event (Sys V) [synonym for SIGIO]
SIGEMT      7, -, 7    A
SIGLOST     -, -, -    A  File lock lost
SIGSYS     12, -,12    C  Bad argument to routine (SVID)

A = default action terminate process
B = default action ignore signal
C = default action terminate process and dump core
D = default action stop process
E = signal cannot be caught
F = signal cannot be ignored

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In reply to Re: Meaning of $SIG{...} = 'DEFAULT'; by repellent
in thread Meaning of $SIG{...} = 'DEFAULT'; by repellent

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