int explain_pclose_or_die(FILE *fp);
int explain_pclose_success(FILE *fp);
void explain_pclose_success_or_die(FILE *fp);
DESCRIPTION
These functions may be used to wait for program termination,
and then reprt errors returned by the pclose(3) system call.
explain_pclose_or_die
int explain_pclose_or_die(FILE *fp);
The explain_pclose_or_die function
is used to call the pclose(3) system
call. On failure an explanation will be
printed to stderr,
obtained from explain_pclose(3),
and then the process terminates
by calling exit(EXIT_FAILURE).
This function is intended to be used in a fashion
similar to the following example:
int status = explain_pclose_or_die(fp);
fp
The fp, exactly as to be passed to the pclose(3) system call.
Returns:
This function only returns on success, see pclose(3) for more
information. On failure, prints an explanation and exits.
explain_pclose_success_or_die
void explain_pclose_success_or_die(FILE *);
The explain_pclose_success_or_die function is used to call
the pclose(3) system call. On failure, including any exit
status other than EXIT_SUCCESS, an explanation will be printed to
stderr, obtained from explain_pclose(3), and then the
process terminates by calling exit(EXIT_FAILURE).
This function is intended to be used in a fashion
similar to the following example:
explain_pclose_success_or_die(fp);
fp
The fp, exactly as to be passed to the pclose(3) system call.
Returns:
This function only returns on success.
On failure, prints an explanation and exits.
explain_pclose_success
int explain_pclose_success(FILE *fp);
The explain_pclose_success function is used to call
the pclose(3) system call. On failure, including any exit
status other than EXIT_SUCCESS, an explanation will be printed to
stderr, obtained from explain_pclose(3).
However, the priniting of an error message does not
also cause exit(2) to be called.
This function is intended to be used in a fashion
similar to the following example:
int status = explain_pclose_success(command);
fp
The fp, exactly as to be passed to the pclose(3) system call.
Returns:
the value returned by the pclose(3) system call.
In all cases other than EXIT_SUCCESS, an error message will also have
been printed to stderr.