Tibor Nagy
d1a424c002
This will allow us to redefine the exit function.
For example:
```
#define exit(code) { \
fprintf(stderr, "%s:%d: exit(%s) in function ‘%s’\n",
__FILE__, __LINE__, #code, __func__); \
_exit(code); \
}
```
26 lines
492 B
C
26 lines
492 B
C
#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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void handler(int sig) {
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puts("Signal handler called!");
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}
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int main(void) {
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if (signal(SIGUSR1, &handler) == SIG_ERR) {
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puts("Signal error!");
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printf("%d\n", errno);
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exit(EXIT_FAILURE);
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}
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puts("Raising...");
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if (raise(SIGUSR1)) {
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puts("Raise error!");
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printf("%d\n", errno);
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exit(EXIT_FAILURE);
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}
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puts("Raised.");
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}
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