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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