ELF_GETARHDR(3ELF) ELF Library Functions ELF_GETARHDR(3ELF)

NAME

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(7) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Stable |
+--------------------+-----------------+
|MT-Level | MT-Safe |
+--------------------+-----------------+

SEE ALSO

elf(3ELF), elf_begin(3ELF), elf_getarsym(3ELF), ar.h(3HEAD),
libelf(3LIB), attributes(7)

July 11, 2001 ELF_GETARHDR(3ELF)