C - <signal.h>
The C <signal.h> header defines functions, types and macros to handle signals. Some running environments use signals to inform running processes of certain events. These events may be related to errors performed by the program, like a wrong arithmetical operation or a exceptional situation, such as a request to interrupt the program. A signal can report some exceptional behavior within the program, or a signal can report some asynchronous event outside the program.
These functions, types and macros are available to use in a current program after including the header file using - #include <signal.h>. All functions, types and macros of this header file are listed below:
Library Functions
| Types | Description |
|---|---|
| signal() | Sets a signal handler for particular signal. |
| raise() | Runs the signal handler for particular signal. |
Library Types
| Types | Description |
|---|---|
| sig_atomic_t | Integer type that can be accessed as an atomic entity from an asynchronous signal handler. |
Library Macros
Signal handlers
| Macros | Description |
|---|---|
| SIG_DFL SIG_IGN |
Defines signal handling strategies. |
| SIG_ERR | Returns value of signal specifying that an error was encountered. |
Signal types
| Macros | Description |
|---|---|
| SIGABRT SIGFPE SIGILL SIGINT SIGSEGV SIGTERM |
Defines signal types |
