Some signals and their supposed purpose:
SIGHUP | Hangup, sent to process when user logs out |
SIGINT | Interrupt, normally sent by ctrl-c |
SIGQUIT | Quit, sent by ctrl-\ |
SIGILL | Illegal instruction |
SIGTRAP | Trap, mostly used by debuggers |
SIGABRT | Aborts process, can be caught, used by Pike whenever something goes seriously wrong. |
SIGBUS | Bus error |
SIGFPE | Floating point error (such as division by zero) |
SIGKILL | Really kill a process, cannot be caught |
SIGUSR1 | Signal reserved for whatever you want to use it for. |
SIGSEGV | Segmentation fault, caused by accessing memory where you shouldn't. Should never happen to Pike. |
SIGUSR2 | Signal reserved for whatever you want to use it for. |
SIGALRM | Signal used for timer interrupts. |
SIGTERM | Termination signal |
SIGSTKFLT | Stack fault |
SIGCHLD | Child process died |
SIGCONT | Continue suspended |
SIGSTOP | Stop process |
SIGSTP | Suspend process |
SIGTTIN | tty input for background process |
SIGTTOU | tty output for background process |
SIGXCPU | Out of cpu |
SIGXFSZ | File size limit exceeded |
SIGPROF | Profile trap |
SIGWINCH | Window change signal |
Note that you have to use signame to translate the name of a signal to it's number.