explain_readlink_or_die(3) - Linux man page

Name

explain_readlink_or_die - read value of a symbolic link and report errors

Synopsis

#include <libexplain/readlink.h>
ssize_t explain_readlink_or_die(const char *pathname, char *data, size_t data_size);
ssize_t explain_readlink_on_error(const char *pathname, char *data, size_t data_size))

Description

The explain_readlink_or_die function is used to call the readlink(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_readlink(3) function, and then the process terminates by calling exit(EXIT_FAILURE).

The explain_readlink_on_error function is used to call the readlink(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_readlink(3) function, but still returns to the caller.

pathname: The pathname, exactly as to be passed to the readlink(2) system call.
data
The data, exactly as to be passed to the readlink(2) system call.
data_size: The data_size, exactly as to be passed to the readlink(2) system call.

Return Value

The explain_readlink_or_die function only returns on success, see readlink(2) for more information. On failure, prints an explanation and exits, it does not return.

The explain_readlink_on_error function always returns the value return by the wrapped readlink(2) system call.

Example

The explain_readlink_or_die function is intended to be used in a fashion similar to the following example:

ssize_t result = explain_readlink_or_die(pathname, data, data_size);

Copyright

Referenced By

explain(3)