The GNU library provides a convenient way to retry a call after a temporary failure, with the macro TEMP_FAILURE_RETRY: — Macro: TEMP_FAILURE_RETRY (expression)
This macro evaluates expression once, and examines its value as type long int. If the value equals -1, that indicates a failure and errno should be set to show what kind of failure. If it fails and reports error code EINTR, TEMP_FAILURE_RETRY evaluates it again, and over and over until the result is not a temporary failure. The value returned by TEMP_FAILURE_RETRY is whatever value expression produced.
/* Used to retry syscalls that can return EINTR. */
#define TEMP_FAILURE_RETRY(exp) ({ \
typeof (exp) _rc; \
do { \
_rc = (exp); \
} while (_rc == -1 && errno == EINTR); \
_rc; })
