Annotation of embedaddon/rsync/tls.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Trivial ls for comparing two directories after running an rsync.
! 3: *
! 4: * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
! 5: * Copyright (C) 2003-2009 Wayne Davison
! 6: *
! 7: * This program is free software; you can redistribute it and/or modify
! 8: * it under the terms of the GNU General Public License as published by
! 9: * the Free Software Foundation; either version 3 of the License, or
! 10: * (at your option) any later version.
! 11: *
! 12: * This program is distributed in the hope that it will be useful,
! 13: * but WITHOUT ANY WARRANTY; without even the implied warranty of
! 14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! 15: * GNU General Public License for more details.
! 16: *
! 17: * You should have received a copy of the GNU General Public License along
! 18: * with this program; if not, write to the Free Software Foundation, Inc.,
! 19: * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
! 20: */
! 21:
! 22: /* The problem with using the system's own ls is that some features
! 23: * have little quirks that make directories look different when for
! 24: * our purposes they're the same -- for example, the BSD braindamage
! 25: * about setting the mode on symlinks based on your current umask.
! 26: *
! 27: * All the filenames must be given on the command line -- tls does not
! 28: * even read directories, let alone recurse. The typical usage is
! 29: * "find|sort|xargs tls".
! 30: *
! 31: * The format is not exactly the same as any particular Unix ls(1).
! 32: *
! 33: * A key requirement for this program is that the output be "very
! 34: * reproducible." So we mask away information that can accidentally
! 35: * change. */
! 36:
! 37: #include "rsync.h"
! 38: #include <popt.h>
! 39: #include "lib/sysxattrs.h"
! 40:
! 41: #define PROGRAM "tls"
! 42:
! 43: /* These are to make syscall.o shut up. */
! 44: int dry_run = 0;
! 45: int am_root = 0;
! 46: int read_only = 1;
! 47: int list_only = 0;
! 48: int link_times = 0;
! 49: int link_owner = 0;
! 50: int preserve_perms = 0;
! 51: int preserve_executability = 0;
! 52:
! 53: #ifdef SUPPORT_XATTRS
! 54:
! 55: #ifdef HAVE_LINUX_XATTRS
! 56: #define XSTAT_ATTR "user.rsync.%stat"
! 57: #else
! 58: #define XSTAT_ATTR "rsync.%stat"
! 59: #endif
! 60:
! 61: static int stat_xattr(const char *fname, STRUCT_STAT *fst)
! 62: {
! 63: int mode, rdev_major, rdev_minor, uid, gid, len;
! 64: char buf[256];
! 65:
! 66: if (am_root >= 0 || IS_DEVICE(fst->st_mode) || IS_SPECIAL(fst->st_mode))
! 67: return -1;
! 68:
! 69: len = sys_lgetxattr(fname, XSTAT_ATTR, buf, sizeof buf - 1);
! 70: if (len >= (int)sizeof buf) {
! 71: len = -1;
! 72: errno = ERANGE;
! 73: }
! 74: if (len < 0) {
! 75: if (errno == ENOTSUP || errno == ENOATTR)
! 76: return -1;
! 77: if (errno == EPERM && S_ISLNK(fst->st_mode)) {
! 78: fst->st_uid = 0;
! 79: fst->st_gid = 0;
! 80: return 0;
! 81: }
! 82: fprintf(stderr, "failed to read xattr %s for %s: %s\n",
! 83: XSTAT_ATTR, fname, strerror(errno));
! 84: return -1;
! 85: }
! 86: buf[len] = '\0';
! 87:
! 88: if (sscanf(buf, "%o %d,%d %d:%d",
! 89: &mode, &rdev_major, &rdev_minor, &uid, &gid) != 5) {
! 90: fprintf(stderr, "Corrupt %s xattr attached to %s: \"%s\"\n",
! 91: XSTAT_ATTR, fname, buf);
! 92: exit(1);
! 93: }
! 94:
! 95: #if _S_IFLNK != 0120000
! 96: if ((mode & (_S_IFMT)) == 0120000)
! 97: mode = (mode & ~(_S_IFMT)) | _S_IFLNK;
! 98: #endif
! 99: fst->st_mode = mode;
! 100:
! 101: fst->st_rdev = MAKEDEV(rdev_major, rdev_minor);
! 102: fst->st_uid = uid;
! 103: fst->st_gid = gid;
! 104:
! 105: return 0;
! 106: }
! 107:
! 108: #endif
! 109:
! 110: static void failed(char const *what, char const *where)
! 111: {
! 112: fprintf(stderr, PROGRAM ": %s %s: %s\n",
! 113: what, where, strerror(errno));
! 114: exit(1);
! 115: }
! 116:
! 117: static void list_file(const char *fname)
! 118: {
! 119: STRUCT_STAT buf;
! 120: char permbuf[PERMSTRING_SIZE];
! 121: struct tm *mt;
! 122: char datebuf[50];
! 123: char linkbuf[4096];
! 124:
! 125: if (do_lstat(fname, &buf) < 0)
! 126: failed("stat", fname);
! 127: #ifdef SUPPORT_XATTRS
! 128: if (am_root < 0)
! 129: stat_xattr(fname, &buf);
! 130: #endif
! 131:
! 132: /* The size of anything but a regular file is probably not
! 133: * worth thinking about. */
! 134: if (!S_ISREG(buf.st_mode))
! 135: buf.st_size = 0;
! 136:
! 137: /* On some BSD platforms the mode bits of a symlink are
! 138: * undefined. Also it tends not to be possible to reset a
! 139: * symlink's mtime, so we default to ignoring it too. */
! 140: if (S_ISLNK(buf.st_mode)) {
! 141: int len;
! 142: buf.st_mode &= ~0777;
! 143: if (!link_times)
! 144: buf.st_mtime = (time_t)0;
! 145: if (!link_owner)
! 146: buf.st_uid = buf.st_gid = 0;
! 147: strlcpy(linkbuf, " -> ", sizeof linkbuf);
! 148: /* const-cast required for silly UNICOS headers */
! 149: len = readlink((char *) fname, linkbuf+4, sizeof(linkbuf) - 4);
! 150: if (len == -1)
! 151: failed("readlink", fname);
! 152: else
! 153: /* it's not nul-terminated */
! 154: linkbuf[4+len] = 0;
! 155: } else {
! 156: linkbuf[0] = 0;
! 157: }
! 158:
! 159: permstring(permbuf, buf.st_mode);
! 160:
! 161: if (buf.st_mtime) {
! 162: mt = gmtime(&buf.st_mtime);
! 163:
! 164: snprintf(datebuf, sizeof datebuf,
! 165: "%04d-%02d-%02d %02d:%02d:%02d",
! 166: (int)mt->tm_year + 1900,
! 167: (int)mt->tm_mon + 1,
! 168: (int)mt->tm_mday,
! 169: (int)mt->tm_hour,
! 170: (int)mt->tm_min,
! 171: (int)mt->tm_sec);
! 172: } else
! 173: strlcpy(datebuf, " ", sizeof datebuf);
! 174:
! 175: /* TODO: Perhaps escape special characters in fname? */
! 176:
! 177: printf("%s ", permbuf);
! 178: if (S_ISCHR(buf.st_mode) || S_ISBLK(buf.st_mode)) {
! 179: printf("%5ld,%6ld",
! 180: (long)major(buf.st_rdev),
! 181: (long)minor(buf.st_rdev));
! 182: } else /* NB: use double for size since it might not fit in a long. */
! 183: printf("%12.0f", (double)buf.st_size);
! 184: printf(" %6ld.%-6ld %6ld %s %s%s\n",
! 185: (long)buf.st_uid, (long)buf.st_gid, (long)buf.st_nlink,
! 186: datebuf, fname, linkbuf);
! 187: }
! 188:
! 189: static struct poptOption long_options[] = {
! 190: /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
! 191: {"link-times", 'l', POPT_ARG_NONE, &link_times, 0, 0, 0 },
! 192: {"link-owner", 'L', POPT_ARG_NONE, &link_owner, 0, 0, 0 },
! 193: #ifdef SUPPORT_XATTRS
! 194: {"fake-super", 'f', POPT_ARG_VAL, &am_root, -1, 0, 0 },
! 195: #endif
! 196: {"help", 'h', POPT_ARG_NONE, 0, 'h', 0, 0 },
! 197: {0,0,0,0,0,0,0}
! 198: };
! 199:
! 200: static void tls_usage(int ret)
! 201: {
! 202: FILE *F = ret ? stderr : stdout;
! 203: fprintf(F,"usage: " PROGRAM " [OPTIONS] FILE ...\n");
! 204: fprintf(F,"Trivial file listing program for portably checking rsync\n");
! 205: fprintf(F,"\nOptions:\n");
! 206: fprintf(F," -l, --link-times display the time on a symlink\n");
! 207: fprintf(F," -L, --link-owner display the owner+group on a symlink\n");
! 208: #ifdef SUPPORT_XATTRS
! 209: fprintf(F," -f, --fake-super display attributes including fake-super xattrs\n");
! 210: #endif
! 211: fprintf(F," -h, --help show this help\n");
! 212: exit(ret);
! 213: }
! 214:
! 215: int
! 216: main(int argc, char *argv[])
! 217: {
! 218: poptContext pc;
! 219: const char **extra_args;
! 220: int opt;
! 221:
! 222: pc = poptGetContext(PROGRAM, argc, (const char **)argv,
! 223: long_options, 0);
! 224: while ((opt = poptGetNextOpt(pc)) != -1) {
! 225: switch (opt) {
! 226: case 'h':
! 227: tls_usage(0);
! 228: default:
! 229: fprintf(stderr,
! 230: "%s: %s\n",
! 231: poptBadOption(pc, POPT_BADOPTION_NOALIAS),
! 232: poptStrerror(opt));
! 233: tls_usage(1);
! 234: }
! 235: }
! 236:
! 237: extra_args = poptGetArgs(pc);
! 238: if (!extra_args || *extra_args == NULL)
! 239: tls_usage(1);
! 240:
! 241: for (; *extra_args; extra_args++)
! 242: list_file(*extra_args);
! 243: poptFreeContext(pc);
! 244:
! 245: return 0;
! 246: }
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