diff options
Diffstat (limited to 'usr.bin/ldd/ldd.c')
| -rw-r--r-- | usr.bin/ldd/ldd.c | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/usr.bin/ldd/ldd.c b/usr.bin/ldd/ldd.c new file mode 100644 index 0000000..a2794f8 --- /dev/null +++ b/usr.bin/ldd/ldd.c @@ -0,0 +1,237 @@ +/* $NetBSD: ldd.c,v 1.23 2017/12/25 05:08:49 maya Exp $ */ + +/*- + * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Paul Kranenburg. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * Copyright 1996 John D. Polstra. + * Copyright 1996 Matt Thomas <matt@3am-software.com> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by John Polstra. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +#ifndef lint +__RCSID("$NetBSD: ldd.c,v 1.23 2017/12/25 05:08:49 maya Exp $"); +#endif /* not lint */ + +#include <sys/types.h> +#include <sys/mman.h> +#include <sys/wait.h> + +#include <dirent.h> +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <stdarg.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <ctype.h> + +#include "debug.h" +#include "rtld.h" +#include "ldd.h" + +/* + * Data declarations. + */ +static char *error_message; /* Message for dlopen(), or NULL */ +bool _rtld_trust; /* False for setuid and setgid programs */ +/* + * This may be ELF64 or ELF32 but since they are used opaquely it doesn't + * really matter. + */ +Obj_Entry *_rtld_objlist; /* Head of linked list of shared objects */ +Obj_Entry **_rtld_objtail = &_rtld_objlist; + /* Link field of last object in list */ +u_int _rtld_objcount; /* Number of shared objects */ +u_int _rtld_objloads; /* Number of objects loaded */ + +Obj_Entry *_rtld_objmain; /* The main program shared object */ +size_t _rtld_pagesz; + +Search_Path *_rtld_default_paths; +Search_Path *_rtld_paths; +Library_Xform *_rtld_xforms; + +static void usage(void) __dead; +char *main_local; +char *main_progname; + +static void +usage(void) +{ + fprintf(stderr, "Usage: %s [-f <format 1>] [-f <format 2>] <filename>" + " ...\n", getprogname()); + exit(1); +} + +int +main(int argc, char **argv) +{ + const char *fmt1 = NULL, *fmt2 = NULL; + int c, exit_status = EXIT_SUCCESS; + +#ifdef DEBUG + debug = 1; +#endif + while ((c = getopt(argc, argv, "f:o")) != -1) { + switch (c) { + case 'f': + if (fmt1) { + if (fmt2) + errx(1, "Too many formats"); + fmt2 = optarg; + } else + fmt1 = optarg; + break; + case 'o': + if (fmt1 || fmt2) + errx(1, "Cannot use -o and -f together"); + fmt1 = "%a:-l%o.%m => %p\n"; + break; + default: + usage(); + /*NOTREACHED*/ + } + } + argc -= optind; + argv += optind; + + if (argc <= 0) { + usage(); + /*NOTREACHED*/ + } + + for (; argc != 0; argc--, argv++) { + int fd; + + fd = open(*argv, O_RDONLY); + if (fd == -1) { + exit_status = EXIT_FAILURE; + warn("%s", *argv); + continue; + } + if (elf_ldd(fd, *argv, fmt1, fmt2) == -1 + /* Alpha never had 32 bit support. */ +#if (defined(_LP64) && !defined(ELF64_ONLY)) || defined(MIPS_N32) + && elf32_ldd(fd, *argv, fmt1, fmt2) == -1 +#if defined(__mips__) && 0 /* XXX this is still hosed for some reason */ + && elf32_ldd_compat(fd, *argv, fmt1, fmt2) == -1 +#endif +#endif + ) { + exit_status = EXIT_FAILURE; + warnx("%s", error_message); + } + close(fd); + } + + return exit_status; +} + +/* + * Error reporting function. Use it like printf. If formats the message + * into a buffer, and sets things up so that the next call to dlerror() + * will return the message. + */ +void +_rtld_error(const char *fmt, ...) +{ + static char buf[512]; + va_list ap; + va_start(ap, fmt); + xvsnprintf(buf, sizeof buf, fmt, ap); + error_message = buf; + va_end(ap); +} + +char * +dlerror() +{ + char *msg = error_message; + error_message = NULL; + return msg; +} + +void +_rtld_die(void) +{ + const char *msg = dlerror(); + + if (msg == NULL) + msg = "Fatal error"; + xerrx(1, "%s", msg); +} + +void +_rtld_shared_enter(void) +{ +} + +void +_rtld_shared_exit(void) +{ +} + +void +_rtld_exclusive_enter(sigset_t *mask) +{ +} + +void +_rtld_exclusive_exit(sigset_t *mask) +{ +} |