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262 lines
6.9 KiB
262 lines
6.9 KiB
/*
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* Trivial ls for comparing two directories after running an rsync.
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*
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* Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
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* Copyright (C) 2003-2014 Wayne Davison
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/* The problem with using the system's own ls is that some features
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* have little quirks that make directories look different when for
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* our purposes they're the same -- for example, the BSD braindamage
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* about setting the mode on symlinks based on your current umask.
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*
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* All the filenames must be given on the command line -- tls does not
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* even read directories, let alone recurse. The typical usage is
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* "find|sort|xargs tls".
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*
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* The format is not exactly the same as any particular Unix ls(1).
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*
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* A key requirement for this program is that the output be "very
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* reproducible." So we mask away information that can accidentally
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* change. */
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#include "rsync.h"
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#include <popt.h>
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#include "lib/sysxattrs.h"
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#define PROGRAM "tls"
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/* These are to make syscall.o shut up. */
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int dry_run = 0;
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int am_root = 0;
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int am_sender = 1;
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int read_only = 1;
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int list_only = 0;
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int link_times = 0;
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int link_owner = 0;
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int nsec_times = 0;
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int preserve_perms = 0;
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int preserve_executability = 0;
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#ifdef SUPPORT_XATTRS
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#ifdef HAVE_LINUX_XATTRS
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#define XSTAT_ATTR "user.rsync.%stat"
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#else
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#define XSTAT_ATTR "rsync.%stat"
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#endif
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static int stat_xattr(const char *fname, STRUCT_STAT *fst)
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{
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int mode, rdev_major, rdev_minor, uid, gid, len;
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char buf[256];
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if (am_root >= 0 || IS_DEVICE(fst->st_mode) || IS_SPECIAL(fst->st_mode))
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return -1;
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len = sys_lgetxattr(fname, XSTAT_ATTR, buf, sizeof buf - 1);
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if (len >= (int)sizeof buf) {
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len = -1;
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errno = ERANGE;
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}
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if (len < 0) {
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if (errno == ENOTSUP || errno == ENOATTR)
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return -1;
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if (errno == EPERM && S_ISLNK(fst->st_mode)) {
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fst->st_uid = 0;
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fst->st_gid = 0;
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return 0;
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}
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fprintf(stderr, "failed to read xattr %s for %s: %s\n",
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XSTAT_ATTR, fname, strerror(errno));
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return -1;
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}
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buf[len] = '\0';
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if (sscanf(buf, "%o %d,%d %d:%d",
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&mode, &rdev_major, &rdev_minor, &uid, &gid) != 5) {
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fprintf(stderr, "Corrupt %s xattr attached to %s: \"%s\"\n",
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XSTAT_ATTR, fname, buf);
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exit(1);
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}
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#if _S_IFLNK != 0120000
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if ((mode & (_S_IFMT)) == 0120000)
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mode = (mode & ~(_S_IFMT)) | _S_IFLNK;
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#endif
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fst->st_mode = mode;
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fst->st_rdev = MAKEDEV(rdev_major, rdev_minor);
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fst->st_uid = uid;
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fst->st_gid = gid;
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return 0;
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}
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#endif
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static void failed(char const *what, char const *where)
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{
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fprintf(stderr, PROGRAM ": %s %s: %s\n",
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what, where, strerror(errno));
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exit(1);
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}
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static void list_file(const char *fname)
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{
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STRUCT_STAT buf;
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char permbuf[PERMSTRING_SIZE];
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struct tm *mt;
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char datebuf[50];
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char linkbuf[4096];
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if (do_lstat(fname, &buf) < 0)
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failed("stat", fname);
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#ifdef SUPPORT_XATTRS
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if (am_root < 0)
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stat_xattr(fname, &buf);
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#endif
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/* The size of anything but a regular file is probably not
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* worth thinking about. */
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if (!S_ISREG(buf.st_mode))
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buf.st_size = 0;
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/* On some BSD platforms the mode bits of a symlink are
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* undefined. Also it tends not to be possible to reset a
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* symlink's mtime, so we default to ignoring it too. */
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if (S_ISLNK(buf.st_mode)) {
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int len;
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buf.st_mode &= ~0777;
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if (!link_times)
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buf.st_mtime = (time_t)0;
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if (!link_owner)
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buf.st_uid = buf.st_gid = 0;
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strlcpy(linkbuf, " -> ", sizeof linkbuf);
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/* const-cast required for silly UNICOS headers */
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len = do_readlink((char *) fname, linkbuf+4, sizeof(linkbuf) - 4);
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if (len == -1)
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failed("do_readlink", fname);
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else
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/* it's not nul-terminated */
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linkbuf[4+len] = 0;
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} else {
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linkbuf[0] = 0;
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}
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permstring(permbuf, buf.st_mode);
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if (buf.st_mtime) {
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int len;
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mt = gmtime(&buf.st_mtime);
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len = snprintf(datebuf, sizeof datebuf,
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"%04d-%02d-%02d %02d:%02d:%02d",
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(int)mt->tm_year + 1900,
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(int)mt->tm_mon + 1,
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(int)mt->tm_mday,
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(int)mt->tm_hour,
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(int)mt->tm_min,
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(int)mt->tm_sec);
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#ifdef ST_MTIME_NSEC
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if (nsec_times) {
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snprintf(datebuf + len, sizeof datebuf - len,
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".%09d", (int)buf.ST_MTIME_NSEC);
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}
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#endif
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} else {
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int len = MIN(19 + 9*nsec_times, (int)sizeof datebuf - 1);
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memset(datebuf, ' ', len);
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datebuf[len] = '\0';
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}
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/* TODO: Perhaps escape special characters in fname? */
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printf("%s ", permbuf);
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if (S_ISCHR(buf.st_mode) || S_ISBLK(buf.st_mode)) {
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printf("%5ld,%6ld",
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(long)major(buf.st_rdev),
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(long)minor(buf.st_rdev));
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} else
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printf("%15s", do_big_num(buf.st_size, 1, NULL));
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printf(" %6ld.%-6ld %6ld %s %s%s\n",
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(long)buf.st_uid, (long)buf.st_gid, (long)buf.st_nlink,
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datebuf, fname, linkbuf);
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}
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static struct poptOption long_options[] = {
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/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
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{"link-times", 'l', POPT_ARG_NONE, &link_times, 0, 0, 0 },
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{"link-owner", 'L', POPT_ARG_NONE, &link_owner, 0, 0, 0 },
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#ifdef SUPPORT_XATTRS
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{"fake-super", 'f', POPT_ARG_VAL, &am_root, -1, 0, 0 },
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#endif
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#ifdef ST_MTIME_NSEC
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{"nsec", 's', POPT_ARG_NONE, &nsec_times, 0, 0, 0 },
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#endif
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{"help", 'h', POPT_ARG_NONE, 0, 'h', 0, 0 },
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{0,0,0,0,0,0,0}
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};
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static void tls_usage(int ret)
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{
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FILE *F = ret ? stderr : stdout;
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fprintf(F,"usage: " PROGRAM " [OPTIONS] FILE ...\n");
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fprintf(F,"Trivial file listing program for portably checking rsync\n");
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fprintf(F,"\nOptions:\n");
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fprintf(F," -l, --link-times display the time on a symlink\n");
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fprintf(F," -L, --link-owner display the owner+group on a symlink\n");
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#ifdef SUPPORT_XATTRS
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fprintf(F," -f, --fake-super display attributes including fake-super xattrs\n");
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#endif
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fprintf(F," -h, --help show this help\n");
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exit(ret);
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}
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int
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main(int argc, char *argv[])
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{
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poptContext pc;
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const char **extra_args;
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int opt;
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pc = poptGetContext(PROGRAM, argc, (const char **)argv,
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long_options, 0);
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while ((opt = poptGetNextOpt(pc)) != -1) {
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switch (opt) {
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case 'h':
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tls_usage(0);
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default:
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fprintf(stderr,
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"%s: %s\n",
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poptBadOption(pc, POPT_BADOPTION_NOALIAS),
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poptStrerror(opt));
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tls_usage(1);
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}
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}
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extra_args = poptGetArgs(pc);
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if (!extra_args || *extra_args == NULL)
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tls_usage(1);
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for (; *extra_args; extra_args++)
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list_file(*extra_args);
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poptFreeContext(pc);
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return 0;
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}
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