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/* Copyright (C) 2025 Red Hat, Inc.
This file is part of elfutils.
This file is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
elfutils is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <assert.h>
#include <fcntl.h>
#include <gelf.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <system.h>
#define printf_indent(n, ...) \
do { \
for (int _i = 0; _i < (n); _i++) \
fputs (" ", stdout); \
printf (__VA_ARGS__); \
} while (0)
static void
ar_extract (Elf *elf, int indent)
{
Elf *subelf;
Elf_Arsym *arsym;
size_t narsym;
Elf_Cmd cmd = ELF_C_READ;
assert (elf_kind (elf) == ELF_K_AR);
arsym = elf_getarsym (elf, &narsym);
if (arsym == NULL)
{
printf_indent (indent, "Cannot get archive index: %s\n", elf_errmsg (-1));
exit (1);
}
if (narsym != 4)
{
printf_indent (indent, "Incorrect number of arsyms\n");
exit (1);
}
printf_indent (indent, "== symbol names ==\n");
/* Print symbol names. Skip the null entry at the end of arsyms. */
for (size_t i = 0; i < narsym - 1; ++i)
printf_indent (indent, "%s\n", arsym[i].as_name);
putchar ('\n');
printf_indent (indent, "== headers ==\n");
/* Print header names and recursively call this function on member
archives. */
while ((subelf = elf_begin (-1, cmd, elf)) != NULL)
{
/* The the header for this element. */
Elf_Arhdr *arhdr = elf_getarhdr (subelf);
if (arhdr == NULL)
{
printf_indent (indent, "cannot get arhdr: %s\n", elf_errmsg (-1));
exit (1);
}
printf_indent (indent, "%s %s\n", arhdr->ar_name, arhdr->ar_rawname);
if (elf_kind (subelf) == ELF_K_AR)
ar_extract (subelf, indent + 1);
cmd = elf_next (subelf);
elf_end (subelf);
}
putchar ('\n');
}
int
main (int argc, char *argv[])
{
int fd;
Elf *elf;
Elf_Cmd cmd;
if (argc < 2)
exit (1);
/* Open the archive. */
fd = open (argv[1], O_RDONLY);
if (fd == -1)
{
printf ("Cannot open input file: %m");
exit (1);
}
/* Set the ELF version. */
elf_version (EV_CURRENT);
/* Create an ELF descriptor. */
cmd = ELF_C_READ;
elf = elf_begin (fd, cmd, NULL);
if (elf == NULL)
{
printf ("Cannot create ELF descriptor: %s\n", elf_errmsg (-1));
exit (1);
}
/* If it is no archive punt. */
if (elf_kind (elf) != ELF_K_AR)
{
printf ("`%s' is no archive\n", argv[1]);
exit (1);
}
ar_extract (elf, 0);
elf_end (elf);
close (fd);
return 0;
}
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