elf_getarhdr

- retrieve archive member header

Synopsis

cc [ flag ... ] file ... -lelf [ library... ]
#include <libelf.h>

Elf_Arhdr *elf_getarhdr(Elf *elf);

Description

elf_getarhdr() returns a pointer to an archive member header, if one is available for the ELF descriptor elf. Otherwise, no archive member header exists, an error occurred, or elf was null; elf_getarhdr() then returns a null value. The header includes the following members.

char    *ar_name;
time_t    ar_date;
uid_t    ar_uid;
gid_t    ar_gid;
mode_t    ar_mode;
off_t    ar_size;
char    *ar_rawname;

An archive member name, available through ar_name, is a null-terminated string, with the ar format control characters removed. The ar_rawname member holds a null-terminated string that represents the original name bytes in the file, including the terminating slash and trailing blanks as specified in the archive format.

In addition to ``regular'' archive members, the archive format defines some special members. All special member names begin with a slash (/), distinguishing them from regular members (whose names may not contain a slash). These special members have the names (ar_name) defined below.

/

This is the archive symbol table. If present, it will be the first archive member. A program may access the archive symbol table through elf_getarsym(). The information in the symbol table is useful for random archive processing (see elf_rand() on elf_begin(3ELF)).

//

This member, if present, holds a string table for long archive member names. An archive member's header contains a 16-byte area for the name, which may be exceeded in some file systems. The library automatically retrieves long member names from the string table, setting ar_name to the appropriate value.

Under some error conditions, a member's name might not be available. Although this causes the library to set ar_name to a null pointer, the ar_rawname member will be set as usual.

Attributes

See attributes(5) for descriptions of the following attributes:

See Also

ar.h(3HEAD), elf(3ELF), elf_begin(3ELF), elf_getarsym(3ELF), libelf(3LIB), attributes(5)