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openscad/scripts/chrpath_linux.c

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/***************************************************************************
* *
* This is a pre-configured single file version of chrpath for linux. *
* It is used in the binary installer for OpenSCAD on Linux. *
* *
* This file has been created by running *
* cat *.h *.c | sed 's, *# *include *",//&,' > ../chrpath_linux.c *
* in the configured chrpath-0.13 source directory (as found in the debian *
* package repository as the original download site seams to be down). *
* *
* chrpath is licensed under the terms of GPLv2: *
* *
* This program 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 2 of the License, or *
* (at your option) any later version. *
* *
* This program 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. *
* *
* The Authors are: *
* *
* Geoffrey Keating <geoffk@ozemail.com.au> *
* Implemented first version of chrpath.c based on first version of *
* killrpath. *
* Peeter Joot <peeterj@ca.ibm.com> *
* Implemented first version of killrpath.c. *
* Petter Reinholdtsen <pere@hungry.com> *
* Collected both implementations and made userfriendly wrapper. *
* *
* With patches from: *
* *
* Darren Salt <linux@youmustbejoking.demon.co.uk> *
* David Hull <hull@paracel.com> *
* Bradford W. Johnson <bradford@math.umn.edu> *
* Thomas Anders <anders@hmi.de> *
* Tollef Fog Heen <tollef@add.no> *
* *
***************************************************************************/
/* config.h. Generated by configure. */
/* config.h.in. Generated from configure.ac by autoheader. */
/* Define to 1 if you have the <elf.h> header file. */
#define HAVE_ELF_H 1
/* Define to 1 if you have the <fcntl.h> header file. */
#define HAVE_FCNTL_H 1
/* Define to 1 if you have the <getopt.h> header file. */
#define HAVE_GETOPT_H 1
/* Define to 1 if you have the `getopt_long' function. */
#define HAVE_GETOPT_LONG 1
/* Define to 1 if you have the <inttypes.h> header file. */
#define HAVE_INTTYPES_H 1
/* Define to 1 if you have the <link.h> header file. */
#define HAVE_LINK_H 1
/* Define to 1 if you have the <memory.h> header file. */
#define HAVE_MEMORY_H 1
/* Define to 1 if you have the <stdint.h> header file. */
#define HAVE_STDINT_H 1
/* Define to 1 if you have the <stdlib.h> header file. */
#define HAVE_STDLIB_H 1
/* Define to 1 if you have the <strings.h> header file. */
#define HAVE_STRINGS_H 1
/* Define to 1 if you have the <string.h> header file. */
#define HAVE_STRING_H 1
/* Define to 1 if you have the <sys/link.h> header file. */
/* #undef HAVE_SYS_LINK_H */
/* Define to 1 if you have the <sys/stat.h> header file. */
#define HAVE_SYS_STAT_H 1
/* Define to 1 if you have the <sys/types.h> header file. */
#define HAVE_SYS_TYPES_H 1
/* Define to 1 if you have the <unistd.h> header file. */
#define HAVE_UNISTD_H 1
/* Name of package */
#define PACKAGE "chrpath"
/* Define to the address where bug reports for this package should be sent. */
#define PACKAGE_BUGREPORT "pere@hungry.com"
/* Define to the full name of this package. */
#define PACKAGE_NAME ""chrpath""
/* Define to the full name and version of this package. */
#define PACKAGE_STRING ""chrpath" "0.13""
/* Define to the one symbol short name of this package. */
#define PACKAGE_TARNAME "-chrpath-"
/* Define to the version of this package. */
#define PACKAGE_VERSION ""0.13""
/* Define to 1 if you have the ANSI C header files. */
#define STDC_HEADERS 1
/* Version number of package */
#define VERSION "0.13"
/* Define to 1 if your processor stores words with the most significant byte
first (like Motorola and SPARC, unlike Intel and VAX). */
/* #undef WORDS_BIGENDIAN */
/* Define to empty if `const' does not conform to ANSI C. */
/* #undef const */
#ifndef PROTOS_H
#define PROTOS_H
#include <elf.h>
//#include "config.h"
#ifdef WORDS_BIGENDIAN
#define ELFDATA2 ELFDATA2MSB
#else
#define ELFDATA2 ELFDATA2LSB
#endif
#if SIZEOF_VOID_P == 8
#define Elf_Ehdr Elf64_Ehdr
#define ELFCLASS ELFCLASS64
#define Elf_Phdr Elf64_Phdr
#define Elf_Shdr Elf64_Shdr
#define Elf_Dyn Elf64_Dyn
#elif SIZEOF_VOID_P == 4
#define Elf_Ehdr Elf32_Ehdr
#define ELFCLASS ELFCLASS32
#define Elf_Phdr Elf32_Phdr
#define Elf_Shdr Elf32_Shdr
#define Elf_Dyn Elf32_Dyn
#else
#error "Unknown word size (SIZEOF_VOID_P)!"
#endif
int killrpath(const char *filename);
int chrpath(const char *filename, const char *newpath, int convert);
int elf_open(const char *filename, int flags, Elf_Ehdr *ehdr);
void elf_close(int fd);
int elf_find_dynamic_section(int fd, Elf_Ehdr *ehdr, Elf_Phdr *phdr);
const char *elf_tagname(int tag);
int elf_dynpath_tag(int tag);
#endif /* PROTOS_H */
/*
<URL:http://gcc.gnu.org/ml/gcc/1999-04n/msg01105.html>
Re: changing embedded RPATH in existing executables.
To: geoffk@ozemail.com.au
Subject: Re: changing embedded RPATH in existing executables.
From: <peeter_joot@VNET.IBM.COM> (peeter joot)
Date: Fri, 30 Apr 1999 16:14:44 -0400 (EDT)
Cc: peeterj@ca.ibm.com, egcs@cygnus.com, libc-hacker@cygnus.com, linux-gcc@vger.rutgers.edu
Reply-To: <peeter_joot@VNET.IBM.COM>
> _Changing_ is a little tricky, but the attached program strips rpaths
> from executables (I find it essential for debugging the binutils).
> It's endian-dependent, if you want this for x86 you can just change
> the occurrences of 'MSB' to 'LSB' and compile (I should really fix
> that).
Hi Geoff,
With your program as a guide (and some peeks into libbfd, elf.h, a bit
of the glibc dynamic loader code, objdump, and a hex-editor) I was able to
figure out enough to find and change the rpath string. That was fun!
This program assumes (unlike your original program) that there is only
one DT_RPATH tag in the dynamic section as even with multiple '-Wl,-rpath,'
commands in the link this seems to occur (they all get concatonated into
a : separated path).
Thanks for your help. If you want to use this on non-x86 you have to change
the occurances of LSB back to MSB:)
Peeter
--
*/
#ifdef HAVE_CONFIG_H
//# include "config.h"
#endif
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <elf.h>
#if defined(HAVE_LINK_H)
# include <link.h>
#endif /* HAVE_LINK_H */
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
//#include "protos.h"
/**
* Reads an ELF file, and reads or alters the RPATH setting.
*
* TODO:
* modify to add RPATH setting if none exists.
*/
int
chrpath(const char *filename, const char *newpath, int convert)
{
int fd;
Elf_Ehdr ehdr;
int i;
Elf_Phdr phdr;
Elf_Shdr shdr;
Elf_Dyn *dyns;
int rpathoff;
char * strtab;
char * rpath;
unsigned int rpathlen;
int oflags;
int rpath_dyns_index;
if (NULL == newpath && 0 == convert)
oflags = O_RDONLY;
else
oflags = O_RDWR;
fd = elf_open(filename, oflags, &ehdr);
if (fd == -1)
{
perror ("elf_open");
return 1;
}
if (0 != elf_find_dynamic_section(fd, &ehdr, &phdr))
{
perror("found no dynamic section");
return 1;
}
dyns = malloc(phdr.p_filesz);
if (dyns == NULL)
{
perror ("allocating memory for dynamic section");
return 1;
}
memset(dyns, 0, phdr.p_filesz);
if (lseek(fd, phdr.p_offset, SEEK_SET) == -1
|| read(fd, dyns, phdr.p_filesz) != (int)phdr.p_filesz)
{
perror ("reading dynamic section");
free(dyns);
return 1;
}
rpathoff = -1;
for ( rpath_dyns_index = 0; dyns[rpath_dyns_index].d_tag != DT_NULL;
++rpath_dyns_index )
{
if ( elf_dynpath_tag(dyns[rpath_dyns_index].d_tag) )
{
rpathoff = dyns[rpath_dyns_index].d_un.d_ptr;
break;
}
}
if (rpathoff == -1)
{
printf("%s: no rpath or runpath tag found.\n", filename);
free(dyns);
return 2;
}
if (lseek(fd, ehdr.e_shoff, SEEK_SET) == -1)
{
perror ("positioning for sections");
free(dyns);
return 1;
}
for (i = 0; i < ehdr.e_shnum; i++)
{
if (read(fd, &shdr, sizeof(shdr)) != sizeof(shdr))
{
perror ("reading section header");
free(dyns);
return 1;
}
if (shdr.sh_type == SHT_STRTAB)
break;
}
if (i == ehdr.e_shnum)
{
fprintf (stderr, "No string table found.\n");
free(dyns);
return 2;
}
strtab = (char *)malloc(shdr.sh_size);
if (strtab == NULL)
{
perror ("allocating memory for string table");
free(dyns);
return 1;
}
memset(strtab, 0, shdr.sh_size);
if (lseek(fd, shdr.sh_offset, SEEK_SET) == -1)
{
perror ("positioning for string table");
free(strtab);
free(dyns);
return 1;
}
if (read(fd, strtab, shdr.sh_size) != (int)shdr.sh_size)
{
perror ("reading string table");
free(strtab);
free(dyns);
return 1;
}
if ((int)shdr.sh_size < rpathoff)
{
fprintf(stderr, "%s string offset not contained in string table",
elf_tagname(dyns[rpath_dyns_index].d_tag));
free(strtab);
free(dyns);
return 5;
}
rpath = strtab+rpathoff;
#if defined(DT_RUNPATH)
if (convert && dyns[rpath_dyns_index].d_tag == DT_RPATH)
{
dyns[rpath_dyns_index].d_tag = DT_RUNPATH;
if (lseek(fd, phdr.p_offset, SEEK_SET) == -1
|| write(fd, dyns, phdr.p_filesz) != (int)phdr.p_filesz)
{
perror ("converting RPATH to RUNPATH");
return 1;
}
printf("%s: RPATH converted to RUNPATH\n", filename);
}
#endif /* DT_RUNPATH */
printf("%s: %s=%s\n", filename, elf_tagname(dyns[rpath_dyns_index].d_tag),
rpath);
if (NULL == newpath)
{
free(dyns);
free(strtab);
return 0;
}
rpathlen = strlen(rpath);
/*
* Calculate the maximum rpath length (will be equal to rpathlen unless
* we have previously truncated it).
*/
for ( i = rpathoff + rpathlen ; (i < (int)shdr.sh_size
&& strtab[i] == '\0') ; i++ )
;
i--;
if (i > (int)(rpathoff + rpathlen))
rpathlen = i - rpathoff;
if (strlen(newpath) > rpathlen)
{
fprintf(stderr, "new rpath '%s' too large; maximum length %i\n",
newpath, rpathlen);
free(dyns);
free(strtab);
return 7;
}
memset(rpath, 0, rpathlen);
strcpy(rpath, newpath);
if (lseek(fd, shdr.sh_offset+rpathoff, SEEK_SET) == -1)
{
perror ("positioning for RPATH");
free(dyns);
free(strtab);
return 1;
}
if (write(fd, rpath, rpathlen) != (int)rpathlen)
{
perror ("writing RPATH");
free(dyns);
free(strtab);
return 1;
}
printf("%s: new %s: %s\n", filename,
elf_tagname(dyns[rpath_dyns_index].d_tag), rpath);
elf_close(fd);
free(dyns);
dyns = NULL;
free(strtab);
return 0;
}
#ifdef HAVE_CONFIG_H
//# include "config.h"
#endif
#include <elf.h>
#if defined(HAVE_SYS_LINK_H)
# include <sys/link.h> /* Find DT_RPATH on Solaris 2.6 */
#endif /* HAVE_SYS_LINK_H */
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
//#include "protos.h"
int
elf_open(const char *filename, int flags, Elf_Ehdr *ehdr)
{
int fd;
fd = open(filename, flags);
if (fd == -1)
{
perror ("open");
return -1;
}
if (read(fd, ehdr, sizeof(*ehdr)) != sizeof(*ehdr))
{
perror ("reading header");
close(fd);
return -1;
}
if (0 != memcmp(ehdr->e_ident, ELFMAG, SELFMAG) ||
ehdr->e_ident[EI_CLASS] != ELFCLASS ||
ehdr->e_ident[EI_DATA] != ELFDATA2 ||
ehdr->e_ident[EI_VERSION] != EV_CURRENT)
{
fprintf(stderr,
#ifdef WORDS_BIGENDIAN
"`%s' probably isn't a %d-bit MSB-first ELF file.\n",
#else /* not WORD_BIGENDIAN */
"`%s' probably isn't a %d-bit LSB-first ELF file.\n",
#endif /* not WORD_BIGENDIAN */
filename, SIZEOF_VOID_P * 8);
close(fd);
errno = ENOEXEC; /* Hm, is this the best errno code to use? */
return -1;
}
if (ehdr->e_phentsize != sizeof(Elf_Phdr))
{
fprintf(stderr, "section size was read as %d, not %d!\n",
ehdr->e_phentsize, (int)sizeof(Elf_Phdr));
close(fd);
return -1;
}
return fd;
}
int
elf_find_dynamic_section(int fd, Elf_Ehdr *ehdr, Elf_Phdr *phdr)
{
int i;
if (lseek(fd, ehdr->e_phoff, SEEK_SET) == -1)
{
perror ("positioning for sections");
return 1;
}
for (i = 0; i < ehdr->e_phnum; i++)
{
if (read(fd, phdr, sizeof(*phdr)) != sizeof(*phdr))
{
perror ("reading section header");
return 1;
}
if (phdr->p_type == PT_DYNAMIC)
break;
}
if (i == ehdr->e_phnum)
{
fprintf (stderr, "No dynamic section found.\n");
return 2;
}
if (0 == phdr->p_filesz)
{
fprintf (stderr, "Length of dynamic section is zero.\n");
return 3;
}
return 0;
}
void
elf_close(int fd)
{
close(fd);
}
const char *
elf_tagname(int tag)
{
switch (tag) {
case DT_RPATH:
return "RPATH";
break;
#if defined(DT_RUNPATH)
case DT_RUNPATH:
return "RUNPATH";
break;
#endif /* DT_RUNPATH */
}
return "UNKNOWN";
}
int
elf_dynpath_tag(int tag)
{
return ( tag == DT_RPATH
#if defined(DT_RUNPATH)
|| tag == DT_RUNPATH
#endif /* DT_RUNPATH */
);
}
/*
Taken from another list:
_Changing_ is a little tricky, but the attached program strips rpaths
from executables (I find it essential for debugging the binutils).
It's endian-dependent, if you want this for x86 you can just change
the occurrences of 'MSB' to 'LSB' and compile (I should really fix
that).
--
Geoffrey Keating <geoffk@ozemail.com.au>
*/
#ifdef HAVE_CONFIG_H
//# include "config.h"
#endif
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <elf.h>
#if defined(HAVE_LINK_H)
# include <link.h>
#endif /* HAVE_LINK_H */
#include <stdlib.h>
//#include "protos.h"
#include <string.h>
/* Reads an ELF file, nukes all the RPATH entries. */
int
killrpath(const char *filename)
{
int fd;
Elf_Ehdr ehdr;
int i;
Elf_Phdr phdr;
Elf_Dyn *dyns;
int dynpos;
fd = elf_open(filename, O_RDWR, &ehdr);
if (fd == -1)
{
perror ("elf_open");
return 1;
}
if (0 != elf_find_dynamic_section(fd, &ehdr, &phdr))
{
perror("found no dynamic section");
return 1;
}
dyns = malloc(phdr.p_memsz);
if (dyns == NULL)
{
perror ("allocating memory for dynamic section");
return 1;
}
memset(dyns, 0, phdr.p_memsz);
if (lseek(fd, phdr.p_offset, SEEK_SET) == -1
|| read(fd, dyns, phdr.p_filesz) != (int)phdr.p_filesz)
{
perror ("reading dynamic section");
return 1;
}
dynpos = 0;
for (i = 0; dyns[i].d_tag != DT_NULL; i++)
{
dyns[dynpos] = dyns[i];
if ( ! elf_dynpath_tag(dyns[i].d_tag) )
dynpos++;
}
for (; dynpos < i; dynpos++)
dyns[dynpos].d_tag = DT_NULL;
if (lseek(fd, phdr.p_offset, SEEK_SET) == -1
|| write(fd, dyns, phdr.p_filesz) != (int)phdr.p_filesz)
{
perror ("writing dynamic section");
return 1;
}
elf_close(fd);
return 0;
}
/*
* Author: Petter Reinholdtsen <pere@hungry.com>
* date: 2001-01-20
*
* Alter ELF rpath information (insert, modify, remove).
*
* Based on source from Peeter Joot <peeterj@ca.ibm.com> and Geoffrey
* Keating <geoffk@ozemail.com.au>.
*/
#ifdef HAVE_CONFIG_H
//# include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
//#include "protos.h"
#ifdef HAVE_GETOPT_LONG
# define GETOPT_LONG getopt_long
static struct option long_options[] =
{
{"convert", 0, 0, 'c'},
{"delete", 0, 0, 'd'},
{"help", 0, 0, 'h'},
{"keepgoing", 0, 0, 'k'},
{"list", 0, 0, 'l'},
{"replace", 1, 0, 'r'},
{"version", 0, 0, 'v'}
};
#else /* not HAVE_GETOPT_LONG */
# define GETOPT_LONG(argc,argv,optstr,lopts,lidx) getopt(argc,argv,optstr)
#endif /* not HAVE_GETOPT_LONG */
static void
usage(char *progname)
{
printf("Usage: %s [-v|-d|-c|-r <path>] <program> [<program> ...]\n\n",
progname);
printf(" -v|--version Display program version number\n");
printf(" -d|--delete Delete current rpath/runpath setting\n");
#if defined(DT_RUNPATH)
printf(" -c|--convert Convert rpath to runpath\n");
#endif /* DT_RUNPATH */
printf(" -r <path>|--replace <path> Replace current rpath/runpath setting\n");
printf(" with the path given\n");
printf(" -l|--list List the current rpath/runpath (default)\n");
printf(" -h|--help Show this usage information.\n");
#ifndef HAVE_GETOPT_LONG
printf("\n *** The long options are not available on this platform");
#endif /* not HAVE_GETOPT_LONG */
#if !defined(DT_RUNPATH)
printf("\n *** There is no support for runpath on this platform");
#endif /* DT_RUNPATH */
printf("\n");
}
int
main(int argc, char * const argv[])
{
int retval = 0;
int convert = 0; /* convert to given type */
int remove = 0; /* remove or not */
int keep_going = 0; /* Break on first error, or keep going? */
char *newpath = NULL; /* insert this path */
int opt;
#ifdef HAVE_GETOPT_LONG
int option_index = 0;
#endif /* HAVE_GETOPT_LONG */
if (argc < 2)
{
usage(argv[0]);
return 1;
}
do {
opt = GETOPT_LONG(argc, argv, "cdhklr:v", long_options, &option_index);
switch (opt)
{
#if defined(DT_RUNPATH)
case 'c':
convert = 1;
break;
#endif /* DT_RUNPATH */
case 'd':
remove = 1;
break;
case 'k':
keep_going = 1;
break;
case 'r':
newpath = optarg;
break;
case 'v':
printf("%s version %s\n", PACKAGE, VERSION);
exit(0);
break;
case 'l': /* This is the default action */
newpath = NULL;
break;
case -1:
break;
default:
printf("Invalid argument '%c'\n", opt);
case 'h':
usage(argv[0]);
exit(0);
break;
}
} while (-1 != opt);
while (optind < argc && (!retval || keep_going))
{
if (remove)
retval |= killrpath(argv[optind++]);
else
/* list by default, replace if path is set */
retval |= chrpath(argv[optind++], newpath, convert);
}
return retval;
}
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