explain_chroot_or_die(3) Library Functions Manual explain_chroot_or_die(3)NAME
explain_chroot_or_die - change root directory and report errors
SYNOPSIS
#include <libexplain/chroot.h>
void explain_chroot_or_die(const char *pathname);
int explain_chroot_on_error(const char *pathname))
DESCRIPTION
The explain_chroot_or_die function is used to call the chroot(2) system call. On failure an explanation will be printed to stderr, obtained
from the explain_chroot(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_chroot_on_error function is used to call the chroot(2) system call. On failure an explanation will be printed to stderr,
obtained from the explain_chroot(3) function, but still returns to the caller.
pathname
The pathname, exactly as to be passed to the chroot(2) system call.
RETURN VALUE
The explain_chroot_or_die function only returns on success, see chroot(2) for more information. On failure, prints an explanation and
exits, it does not return.
The explain_chroot_on_error function always returns the value return by the wrapped chroot(2) system call.
EXAMPLE
The explain_chroot_or_die function is intended to be used in a fashion similar to the following example:
explain_chroot_or_die(pathname);
SEE ALSO chroot(2)
change root directory
explain_chroot(3)
explain chroot(2) errors
exit(2) terminate the calling process
COPYRIGHT
libexplain version 0.52
Copyright (C) 2009 Peter Miller
explain_chroot_or_die(3)
Check Out this Related Man Page
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)