SIG_DFL, SIG_IGN - cppreference.com (original) (raw)

| Defined in header <signal.h> | | | | ----------------------------------------------------------------------- | | | | #define SIG_DFL /*implementation defined*/ | | | | #define SIG_IGN /*implementation defined*/ | | |

The SIG_DFL and SIG_IGN macros expand into integral expressions that are not equal to an address of any function. The macros define signal handling strategies for signal() function.

[edit] Example

#include <signal.h> #include <stdio.h>   int main(void) { /* using the default signal handler / raise(SIGTERM); printf("Exit main()\n"); / never reached */ }

Output:

[edit] Example

[edit] 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>

[edit] See also