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Top Forums Shell Programming and Scripting plz explain the execution flow Post 302388730 by pludi on Thursday 21st of January 2010 08:40:33 AM
Old 01-21-2010
A SIGINT is the "Interrupt Signal", which is sent to the program when you hit CTRL+C (for example). It won't usually get sent to any process just because a file isn't found, and rm surely never sends it.

The reason you're getting the error message twice is that first your regular rm tries to remove a non-existent file, and then the trapped rm is triggered by the pseudo-signal 0, which means EOF.
 

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_lwp_kill(2)							   System Calls 						      _lwp_kill(2)

NAME
_lwp_kill - send a signal to a LWP SYNOPSIS
#include <sys/lwp.h> #include <signal.h> int _lwp_kill(lwpid_t target_lwp, int sig); DESCRIPTION
The _lwp_kill() function sends a signal to the LWP specified by target_lwp. The signal that is to be sent is specified by sig and must be one from the list given in signal.h(3HEAD). If sig is 0 (the null signal), error checking is performed but no signal is actually sent. This can be used to check the validity of target_lwp. The target_lwp must be an LWP within the same process as the calling LWP. RETURN VALUES
Upon successful completion, 0 is returned. A non-zero value indicates an error. ERRORS
If any of the following conditions occur, _lwp_kill() fails and returns the corresponding value: EINVAL The sig argument is not a valid signal number. ESRCH The target_lwp argument cannot be found in the current process. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |MT-Level |Async-Signal-Safe | +-----------------------------+-----------------------------+ SEE ALSO
kill(2), sigaction(2), sigprocmask(2), signal.h(3HEAD), attributes(5) SunOS 5.10 8 Aug 2001 _lwp_kill(2)
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