elf_error.3e (2010 09)

e
elf_error(3E) elf_error(3E)
NAME
elf_errmsg, elf_errno - error handling
SYNOPSIS
cc [flag... ] file...
-lelf [library ] ...
#include <libelf.h>
const char *elf_errmsg(int err);
int elf_errno(void);
DESCRIPTION
If an ELF library function fails, a program may call
elf_errno to retrieve the library’s internal error
number. As a side effect, this function resets the internal error number to zero, which indicates no error.
elf_errmsg takes an error number, err, and returns a null-terminated error message (with no trailing
new-line) that describes the problem. A zero err retrieves a message for the most recent error. If no error
has occurred, the return value is a null pointer (not a pointer to the null string). Using err of -1 also
retrieves the most recent error, except it guarantees a non-null return value, even when no error has
occurred. If no message is available for the given number,
elf_errmsg returns a pointer to an
appropriate message. This function does not have the side effect of clearing the internal error number.
EXAMPLES
The following fragment clears the internal error number and checks it later for errors. Unless an error
occurs after the first call to
elf_errno, the next call will return zero.
(void)elf_errno();
while (more_to_do)
{
/* processing ... */
if ((err = elf_errno()) != 0)
{
msg = elf_errmsg(err);
/* print msg */
}
}
SEE ALSO
elf(3E), elf_version(3E).
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1