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SIGTERM, SIGSEGV, SIGINT, SIGILL, SIGABRT, SIGFPE

From cppreference.com
< c‎ | program
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

[edit] See also

sets a signal handler for particular signal
(function) [edit]
runs the signal handler for particular signal
(function) [edit]
C++ documentation for signal types