/* * Trivial ls for comparing two directories after running an rsync. * * Copyright (C) 2001, 2002 Martin Pool * Copyright (C) 2003-2007 Wayne Davison * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * 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. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ /* The problem with using the system's own ls is that some features * have little quirks that make directories look different when for * our purposes they're the same -- for example, the BSD braindamage * about setting the mode on symlinks based on your current umask. * * All the filenames must be given on the command line -- tls does not * even read directories, let alone recurse. The typical usage is * "find|sort|xargs tls". * * The format is not exactly the same as any particular Unix ls(1). * * A key requirement for this program is that the output be "very * reproducible." So we mask away information that can accidentally * change. */ #include "rsync.h" #include "lib/sysxattrs.h" #define PROGRAM "tls" /* These are to make syscall.o shut up. */ int dry_run = 0; int am_root = 0; int read_only = 1; int list_only = 0; int preserve_perms = 0; #ifdef HAVE_LINUX_XATTRS #define XSTAT_ATTR "user.rsync.%stat" #else #define XSTAT_ATTR "rsync.%stat" #endif static int stat_xattr(const char *fname, STRUCT_STAT *fst) { int mode, rdev_major, rdev_minor, uid, gid, len; char buf[256]; if (am_root >= 0 || IS_DEVICE(fst->st_mode) || IS_SPECIAL(fst->st_mode)) return -1; len = sys_lgetxattr(fname, XSTAT_ATTR, buf, sizeof buf - 1); if (len >= (int)sizeof buf) { len = -1; errno = ERANGE; } if (len < 0) { if (errno == ENOTSUP || errno == ENOATTR) return -1; if (errno == EPERM && S_ISLNK(fst->st_mode)) { fst->st_uid = 0; fst->st_gid = 0; return 0; } fprintf(stderr, "failed to read xattr %s for %s: %s\n", XSTAT_ATTR, fname, strerror(errno)); return -1; } buf[len] = '\0'; if (sscanf(buf, "%o %d,%d %d:%d", &mode, &rdev_major, &rdev_minor, &uid, &gid) != 5) { fprintf(stderr, "Corrupt %s xattr attached to %s: \"%s\"\n", XSTAT_ATTR, fname, buf); exit(1); } fst->st_mode = from_wire_mode(mode); fst->st_rdev = MAKEDEV(rdev_major, rdev_minor); fst->st_uid = uid; fst->st_gid = gid; return 0; } static void failed(char const *what, char const *where) { fprintf(stderr, PROGRAM ": %s %s: %s\n", what, where, strerror(errno)); exit(1); } static void list_file(const char *fname) { STRUCT_STAT buf; char permbuf[PERMSTRING_SIZE]; struct tm *mt; char datebuf[50]; char linkbuf[4096]; if (do_lstat(fname, &buf) < 0) failed("stat", fname); if (am_root < 0) stat_xattr(fname, &buf); /* The size of anything but a regular file is probably not * worth thinking about. */ if (!S_ISREG(buf.st_mode)) buf.st_size = 0; /* On some BSD platforms the mode bits of a symlink are * undefined. Also it tends not to be possible to reset a * symlink's mtime, so we have to ignore it too. */ if (S_ISLNK(buf.st_mode)) { int len; buf.st_mode &= ~0777; buf.st_mtime = (time_t)0; buf.st_uid = buf.st_gid = 0; strlcpy(linkbuf, " -> ", sizeof linkbuf); /* const-cast required for silly UNICOS headers */ len = readlink((char *) fname, linkbuf+4, sizeof(linkbuf) - 4); if (len == -1) failed("readlink", fname); else /* it's not nul-terminated */ linkbuf[4+len] = 0; } else { linkbuf[0] = 0; } permstring(permbuf, buf.st_mode); if (buf.st_mtime) { mt = gmtime(&buf.st_mtime); snprintf(datebuf, sizeof datebuf, "%04d-%02d-%02d %02d:%02d:%02d", (int)mt->tm_year + 1900, (int)mt->tm_mon + 1, (int)mt->tm_mday, (int)mt->tm_hour, (int)mt->tm_min, (int)mt->tm_sec); } else strlcpy(datebuf, " ", sizeof datebuf); /* TODO: Perhaps escape special characters in fname? */ printf("%s ", permbuf); if (S_ISCHR(buf.st_mode) || S_ISBLK(buf.st_mode)) { printf("%5ld,%6ld", (long)major(buf.st_rdev), (long)minor(buf.st_rdev)); } else /* NB: use double for size since it might not fit in a long. */ printf("%12.0f", (double)buf.st_size); printf(" %6ld.%-6ld %6ld %s %s%s\n", (long)buf.st_uid, (long)buf.st_gid, (long)buf.st_nlink, datebuf, fname, linkbuf); } int main(int argc, char *argv[]) { if (argc < 2) { fprintf(stderr, "usage: " PROGRAM " FILE ...\n" "Trivial file listing program for portably checking rsync\n"); return 1; } if (getenv("RSYNC_FAKE_SUPER")) am_root = -1; for (argv++; *argv; argv++) list_file(*argv); return 0; }