explain_dup2_or_die man page

explain_dup2_or_die — duplicate a file descriptor and report errors

Synopsis

#include <libexplain/dup2.h>

void explain_dup2_or_die(int oldfd, int newfd);

Description

The explain_dup2_or_die function is used to call the dup2(2) system call.  On failure an explanation will be printed to stderr, obtained from explain_dup2(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_dup2_or_die(oldfd, newfd);
oldfd

The oldfd, exactly as to be passed to the dup2(2) system call.

newfd

The newfd, exactly as to be passed to the dup2(2) system call.

Returns:

This function only returns on success. On failure, prints an explanation and exits.

See Also

dup2(2)

duplicate a file descriptor

explain_dup2(3)

explain dup2(2) errors

exit(2)

terminate the calling process

Referenced By

explain(3), explain_dup2(3).