12-27-2007
Quote:
Originally Posted by
mehmet_demirez
Use exit with an exit code to indicate success or failure
0 : success
anything but 0 : failure
I have neaver set up error traping before. Can you give me a simple example?
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LEARN ABOUT DEBIAN
explain_pclose_or_die
explain_pclose_or_die(3) Library Functions Manual explain_pclose_or_die(3)
NAME
explain_pclose_or_die - process I/O and report errors
SYNOPSIS
#include <libexplain/pclose.h>
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_SUC-
CESS, 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.
SEE ALSO
pclose(3)
process I/O
explain_pclose(3)
explain pclose(3) errors
exit(2) terminate the calling process
COPYRIGHT
libexplain version 0.52
Copyright (C) 2009 Peter Miller
explain_pclose_or_die(3)