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NLIST(3) Library Functions Manual NLIST(3)

nlist
retrieve symbol table name list from an executable file

#include <nlist.h>

int
nlist(const char *filename, struct nlist *nl);

The nlist() function retrieves name list entries from the symbol table of an executable file. (See elf(5).) The argument nl is set to reference the beginning of the list. The list is preened of binary and invalid data; if an entry in the name list is valid, the n_type and n_value for the entry are copied into the list referenced by nl. No other data is copied. The last entry in the list always has its n_name field set to NULL.

The number of invalid entries is returned if successful; otherwise, if the file filename does not exist or is not an executable, the returned value is -1.

elf(5)

An nlist() function first appeared in Version 3 AT&T UNIX.
October 20, 2013 OpenBSD-current