SIGSTOP
Encyclopedia
On POSIX
-compliant platforms, SIGSTOP is the signal
sent to a process
to stop it for later resumption. The symbolic constant
for SIGSTOP is defined in the header file
signal. SIGSTOP and SIGCONT are used for job control, among other purposes. SIGSTOP cannot be caught or ignored.
POSIX
POSIX , an acronym for "Portable Operating System Interface", is a family of standards specified by the IEEE for maintaining compatibility between operating systems...
-compliant platforms, SIGSTOP is the signal
Signal (computing)
A signal is a limited form of inter-process communication used in Unix, Unix-like, and other POSIX-compliant operating systems. Essentially it is an asynchronous notification sent to a process in order to notify it of an event that occurred. When a signal is sent to a process, the operating system...
sent to a process
Process (computing)
In computing, a process is an instance of a computer program that is being executed. It contains the program code and its current activity. Depending on the operating system , a process may be made up of multiple threads of execution that execute instructions concurrently.A computer program is a...
to stop it for later resumption. The symbolic constant
C preprocessor
The C preprocessor is the preprocessor for the C and C++ computer programming languages. The preprocessor handles directives for source file inclusion , macro definitions , and conditional inclusion ....
for SIGSTOP is defined in the header file
Header file
Some programming languages use header files. These files allow programmers to separate certain elements of a program's source code into reusable files. Header files commonly contain forward declarations of classes, subroutines, variables, and other identifiers...
signal.h. Symbolic signal names are used because signal numbers can vary across platforms.Etymology
SIG is a common prefix for signal names. STOP means precisely stop.Usage
When SIGSTOP is sent to a process, the usual behaviour is to pause that process in its current state. The process will only resume execution if it is sent the SIGCONTSIGCONT
On POSIX-compliant platforms, SIGCONT is the signal sent to restart a process previously paused by the SIGSTOP or SIGTSTP signal. The symbolic constant for SIGCONT is defined in the header file signal.h. Symbolic signal names are used because signal numbers can vary across platforms.-Etymology:SIG...
signal. SIGSTOP and SIGCONT are used for job control, among other purposes. SIGSTOP cannot be caught or ignored.