diff options
Diffstat (limited to 'usr.bin/ldd/ldd.c')
| -rw-r--r-- | usr.bin/ldd/ldd.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/usr.bin/ldd/ldd.c b/usr.bin/ldd/ldd.c new file mode 100644 index 0000000..331d3c7 --- /dev/null +++ b/usr.bin/ldd/ldd.c @@ -0,0 +1,170 @@ +/* + * Copyright (c) 1993 Paul Kranenburg + * 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 Paul Kranenburg. + * 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. + * + * $Id$ + */ + +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/file.h> +#include <sys/time.h> +#include <sys/resource.h> +#include <sys/wait.h> +#include <a.out.h> +#include <err.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +extern void dump_filename __P((const char *)); +extern int error_count; + +void +usage() +{ + fprintf(stderr, "usage: ldd [-v] [-f format] program ...\n"); + exit(1); +} + +int +main(argc, argv) +int argc; +char *argv[]; +{ + char *fmt1 = NULL, *fmt2 = NULL; + int rval; + int c; + int vflag = 0; + + while ((c = getopt(argc, argv, "vf:")) != EOF) { + switch (c) { + case 'v': + vflag++; + break; + case 'f': + if (fmt1) { + if (fmt2) + errx(1, "Too many formats"); + fmt2 = optarg; + } else + fmt1 = optarg; + break; + default: + usage(); + /*NOTREACHED*/ + } + } + argc -= optind; + argv += optind; + + if (vflag && fmt1) + errx(1, "-v may not be used with -f"); + + if (argc <= 0) { + usage(); + /*NOTREACHED*/ + } + + if (vflag) { + for (c = 0; c < argc; c++) + dump_file(argv[c]); + exit(error_count == 0 ? EXIT_SUCCESS : EXIT_FAILURE); + } + + /* ld.so magic */ + setenv("LD_TRACE_LOADED_OBJECTS", "1", 1); + if (fmt1) + setenv("LD_TRACE_LOADED_OBJECTS_FMT1", fmt1, 1); + if (fmt2) + setenv("LD_TRACE_LOADED_OBJECTS_FMT2", fmt2, 1); + + rval = 0; + while (argc--) { + int fd; + struct exec hdr; + int status; + + if ((fd = open(*argv, O_RDONLY, 0)) < 0) { + warn("%s", *argv); + rval |= 1; + argv++; + continue; + } + if (read(fd, &hdr, sizeof hdr) != sizeof hdr + || (N_GETFLAG(hdr) & EX_DPMASK) != EX_DYNAMIC +#if 1 /* Compatibility */ + || hdr.a_entry < __LDPGSZ +#endif + ) { + + warnx("%s: not a dynamic executable", *argv); + (void)close(fd); + rval |= 1; + argv++; + continue; + } + (void)close(fd); + + setenv("LD_TRACE_LOADED_OBJECTS_PROGNAME", *argv, 1); + if (fmt1 == NULL && fmt2 == NULL) + /* Default formats */ + printf("%s:\n", *argv); + + fflush(stdout); + + switch (fork()) { + case -1: + err(1, "fork"); + break; + default: + if (wait(&status) <= 0) { + warn("wait"); + rval |= 1; + } else if (WIFSIGNALED(status)) { + fprintf(stderr, "%s: signal %d\n", + *argv, WTERMSIG(status)); + rval |= 1; + } else if (WIFEXITED(status) && WEXITSTATUS(status)) { + fprintf(stderr, "%s: exit status %d\n", + *argv, WEXITSTATUS(status)); + rval |= 1; + } + break; + case 0: + rval |= execl(*argv, *argv, NULL) != 0; + perror(*argv); + _exit(1); + } + argv++; + } + + return rval; +} |
