Annotation of embedaddon/rsync/tls.c, revision 1.1.1.3

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>
1.1.1.3 ! misho       5:  * Copyright (C) 2003-2015 Wayne Davison
1.1       misho       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;
1.1.1.2   misho      46: int am_sender = 1;
1.1       misho      47: int read_only = 1;
                     48: int list_only = 0;
                     49: int link_times = 0;
                     50: int link_owner = 0;
1.1.1.2   misho      51: int nsec_times = 0;
1.1       misho      52: int preserve_perms = 0;
                     53: int preserve_executability = 0;
                     54: 
                     55: #ifdef SUPPORT_XATTRS
                     56: 
                     57: #ifdef HAVE_LINUX_XATTRS
                     58: #define XSTAT_ATTR "user.rsync.%stat"
                     59: #else
                     60: #define XSTAT_ATTR "rsync.%stat"
                     61: #endif
                     62: 
                     63: static int stat_xattr(const char *fname, STRUCT_STAT *fst)
                     64: {
                     65:        int mode, rdev_major, rdev_minor, uid, gid, len;
                     66:        char buf[256];
                     67: 
                     68:        if (am_root >= 0 || IS_DEVICE(fst->st_mode) || IS_SPECIAL(fst->st_mode))
                     69:                return -1;
                     70: 
                     71:        len = sys_lgetxattr(fname, XSTAT_ATTR, buf, sizeof buf - 1);
                     72:        if (len >= (int)sizeof buf) {
                     73:                len = -1;
                     74:                errno = ERANGE;
                     75:        }
                     76:        if (len < 0) {
                     77:                if (errno == ENOTSUP || errno == ENOATTR)
                     78:                        return -1;
                     79:                if (errno == EPERM && S_ISLNK(fst->st_mode)) {
                     80:                        fst->st_uid = 0;
                     81:                        fst->st_gid = 0;
                     82:                        return 0;
                     83:                }
                     84:                fprintf(stderr, "failed to read xattr %s for %s: %s\n",
                     85:                        XSTAT_ATTR, fname, strerror(errno));
                     86:                return -1;
                     87:        }
                     88:        buf[len] = '\0';
                     89: 
                     90:        if (sscanf(buf, "%o %d,%d %d:%d",
                     91:                   &mode, &rdev_major, &rdev_minor, &uid, &gid) != 5) {
                     92:                fprintf(stderr, "Corrupt %s xattr attached to %s: \"%s\"\n",
                     93:                        XSTAT_ATTR, fname, buf);
                     94:                exit(1);
                     95:        }
                     96: 
                     97: #if _S_IFLNK != 0120000
                     98:        if ((mode & (_S_IFMT)) == 0120000)
                     99:                mode = (mode & ~(_S_IFMT)) | _S_IFLNK;
                    100: #endif
                    101:        fst->st_mode = mode;
                    102: 
                    103:        fst->st_rdev = MAKEDEV(rdev_major, rdev_minor);
                    104:        fst->st_uid = uid;
                    105:        fst->st_gid = gid;
                    106: 
                    107:        return 0;
                    108: }
                    109: 
                    110: #endif
                    111: 
                    112: static void failed(char const *what, char const *where)
                    113: {
                    114:        fprintf(stderr, PROGRAM ": %s %s: %s\n",
                    115:                what, where, strerror(errno));
                    116:        exit(1);
                    117: }
                    118: 
                    119: static void list_file(const char *fname)
                    120: {
                    121:        STRUCT_STAT buf;
                    122:        char permbuf[PERMSTRING_SIZE];
                    123:        struct tm *mt;
                    124:        char datebuf[50];
                    125:        char linkbuf[4096];
                    126: 
                    127:        if (do_lstat(fname, &buf) < 0)
                    128:                failed("stat", fname);
                    129: #ifdef SUPPORT_XATTRS
                    130:        if (am_root < 0)
                    131:                stat_xattr(fname, &buf);
                    132: #endif
                    133: 
                    134:        /* The size of anything but a regular file is probably not
                    135:         * worth thinking about. */
                    136:        if (!S_ISREG(buf.st_mode))
                    137:                buf.st_size = 0;
                    138: 
                    139:        /* On some BSD platforms the mode bits of a symlink are
                    140:         * undefined.  Also it tends not to be possible to reset a
                    141:         * symlink's mtime, so we default to ignoring it too. */
                    142:        if (S_ISLNK(buf.st_mode)) {
                    143:                int len;
                    144:                buf.st_mode &= ~0777;
                    145:                if (!link_times)
                    146:                        buf.st_mtime = (time_t)0;
                    147:                if (!link_owner)
                    148:                        buf.st_uid = buf.st_gid = 0;
                    149:                strlcpy(linkbuf, " -> ", sizeof linkbuf);
                    150:                /* const-cast required for silly UNICOS headers */
1.1.1.2   misho     151:                len = do_readlink((char *) fname, linkbuf+4, sizeof(linkbuf) - 4);
1.1       misho     152:                if (len == -1)
1.1.1.2   misho     153:                        failed("do_readlink", fname);
1.1       misho     154:                else
                    155:                        /* it's not nul-terminated */
                    156:                        linkbuf[4+len] = 0;
                    157:        } else {
                    158:                linkbuf[0] = 0;
                    159:        }
                    160: 
                    161:        permstring(permbuf, buf.st_mode);
                    162: 
                    163:        if (buf.st_mtime) {
1.1.1.2   misho     164:                int len;
1.1       misho     165:                mt = gmtime(&buf.st_mtime);
                    166: 
1.1.1.2   misho     167:                len = snprintf(datebuf, sizeof datebuf,
1.1       misho     168:                        "%04d-%02d-%02d %02d:%02d:%02d",
                    169:                        (int)mt->tm_year + 1900,
                    170:                        (int)mt->tm_mon + 1,
                    171:                        (int)mt->tm_mday,
                    172:                        (int)mt->tm_hour,
                    173:                        (int)mt->tm_min,
                    174:                        (int)mt->tm_sec);
1.1.1.2   misho     175: #ifdef ST_MTIME_NSEC
                    176:                if (nsec_times) {
                    177:                        snprintf(datebuf + len, sizeof datebuf - len,
                    178:                                ".%09d", (int)buf.ST_MTIME_NSEC);
                    179:                }
                    180: #endif
                    181:        } else {
                    182:                int len = MIN(19 + 9*nsec_times, (int)sizeof datebuf - 1);
                    183:                memset(datebuf, ' ', len);
                    184:                datebuf[len] = '\0';
                    185:        }
1.1       misho     186: 
                    187:        /* TODO: Perhaps escape special characters in fname? */
                    188: 
                    189:        printf("%s ", permbuf);
                    190:        if (S_ISCHR(buf.st_mode) || S_ISBLK(buf.st_mode)) {
                    191:                printf("%5ld,%6ld",
                    192:                    (long)major(buf.st_rdev),
                    193:                    (long)minor(buf.st_rdev));
1.1.1.2   misho     194:        } else
                    195:                printf("%15s", do_big_num(buf.st_size, 1, NULL));
1.1       misho     196:        printf(" %6ld.%-6ld %6ld %s %s%s\n",
                    197:               (long)buf.st_uid, (long)buf.st_gid, (long)buf.st_nlink,
                    198:               datebuf, fname, linkbuf);
                    199: }
                    200: 
                    201: static struct poptOption long_options[] = {
                    202:   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
                    203:   {"link-times",      'l', POPT_ARG_NONE,   &link_times, 0, 0, 0 },
                    204:   {"link-owner",      'L', POPT_ARG_NONE,   &link_owner, 0, 0, 0 },
                    205: #ifdef SUPPORT_XATTRS
                    206:   {"fake-super",      'f', POPT_ARG_VAL,    &am_root, -1, 0, 0 },
                    207: #endif
1.1.1.2   misho     208: #ifdef ST_MTIME_NSEC
                    209:   {"nsec",            's', POPT_ARG_NONE,   &nsec_times, 0, 0, 0 },
                    210: #endif
1.1       misho     211:   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
                    212:   {0,0,0,0,0,0,0}
                    213: };
                    214: 
                    215: static void tls_usage(int ret)
                    216: {
                    217:   FILE *F = ret ? stderr : stdout;
                    218:   fprintf(F,"usage: " PROGRAM " [OPTIONS] FILE ...\n");
                    219:   fprintf(F,"Trivial file listing program for portably checking rsync\n");
                    220:   fprintf(F,"\nOptions:\n");
                    221:   fprintf(F," -l, --link-times            display the time on a symlink\n");
                    222:   fprintf(F," -L, --link-owner            display the owner+group on a symlink\n");
                    223: #ifdef SUPPORT_XATTRS
                    224:   fprintf(F," -f, --fake-super            display attributes including fake-super xattrs\n");
                    225: #endif
                    226:   fprintf(F," -h, --help                  show this help\n");
                    227:   exit(ret);
                    228: }
                    229: 
                    230: int
                    231: main(int argc, char *argv[])
                    232: {
                    233:        poptContext pc;
                    234:        const char **extra_args;
                    235:        int opt;
                    236: 
                    237:        pc = poptGetContext(PROGRAM, argc, (const char **)argv,
                    238:                            long_options, 0);
                    239:        while ((opt = poptGetNextOpt(pc)) != -1) {
                    240:                switch (opt) {
                    241:                case 'h':
                    242:                        tls_usage(0);
                    243:                default:
                    244:                        fprintf(stderr,
                    245:                                "%s: %s\n",
                    246:                                poptBadOption(pc, POPT_BADOPTION_NOALIAS),
                    247:                                poptStrerror(opt));
                    248:                        tls_usage(1);
                    249:                }
                    250:        }
                    251: 
                    252:        extra_args = poptGetArgs(pc);
                    253:        if (!extra_args || *extra_args == NULL)
                    254:                tls_usage(1);
                    255: 
                    256:        for (; *extra_args; extra_args++)
                    257:                list_file(*extra_args);
                    258:        poptFreeContext(pc);
                    259: 
                    260:        return 0;
                    261: }

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