SIGTERM, SIGSEGV, SIGINT, SIGILL, SIGABRT, SIGFPE

 

C

Compiler support

Language

Headers

Type support

Program utilities

Variadic function support

Error handling

Dynamic memory management

Strings library

Algorithms

Numerics

Date and time utilities

Input/output support

Localization support

Concurrency support (C11)

Technical Specifications

Symbol index

 

Program support utilities

Program termination
abort exit quick_exit (C11) _Exit (C99)	atexit at_quick_exit (C11) EXIT_SUCCESSEXIT_FAILURE
Unreachable control flow
unreachable (C23)
Communicating with the environment
getenvgetenv_s (C11)	system
Memory alignment query
memalignment (C23)
Signals
signal raise sig_atomic_t	SIG_DFLSIG_IGN SIG_ERR
Signal types
SIGABRTSIGFPESIGILL	SIGINTSIGSEGVSIGTERM
Non-local jumps
setjmp	longjmp
Types
jmp_buf

 

Defined in header <signal.h>
#define SIGTERM /*implementation defined*/
#define SIGSEGV /*implementation defined*/
#define SIGINT /*implementation defined*/
#define SIGILL /*implementation defined*/
#define SIGABRT /*implementation defined*/
#define SIGFPE /*implementation defined*/

Each of the above macro constants expands to an integer constant expression with distinct values, which represent different signals sent to the program.

Constant	Explanation
SIGTERM	termination request, sent to the program
SIGSEGV	invalid memory access (segmentation fault)
SIGINT	external interrupt, usually initiated by the user
SIGILL	invalid program image, such as invalid instruction
SIGABRT	abnormal termination condition, as is e.g. initiated by abort()
SIGFPE	erroneous arithmetic operation such as divide by zero

References

• C17 standard (ISO/IEC 9899:2018):

• 7.14/3 Signal handling <signal.h> (p: 193)

• C11 standard (ISO/IEC 9899:2011):

• 7.14/3 Signal handling <signal.h> (p: 265)

• C99 standard (ISO/IEC 9899:1999):

• 7.14/3 Signal handling <signal.h> (p: 246)

• C89/C90 standard (ISO/IEC 9899:1990):

• 4.7 SIGNAL HANDLING <signal.h>

See also

signal	sets a signal handler for particular signal (function)
raise	runs the signal handler for particular signal (function)
C++ documentation for signal types