The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 1993, 1994 Jeffrey C. Mogul, Digital Equipment Corporation, |
| 3 | * Western Research Laboratory. All rights reserved. |
| 4 | * Copyright (c) 2001 Compaq Computer Corporation. All rights reserved. |
| 5 | * |
| 6 | * Permission to use, copy, and modify this software and its |
| 7 | * documentation is hereby granted only under the following terms and |
| 8 | * conditions. Both the above copyright notice and this permission |
| 9 | * notice must appear in all copies of the software, derivative works |
| 10 | * or modified versions, and any portions thereof, and both notices |
| 11 | * must appear in supporting documentation. |
| 12 | * |
| 13 | * Redistribution and use in source and binary forms, with or without |
| 14 | * modification, are permitted provided that the following conditions |
| 15 | * are met: |
| 16 | * 1. Redistributions of source code must retain the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer. |
| 18 | * 2. Redistributions in binary form must reproduce the above copyright |
| 19 | * notice, this list of conditions and the following disclaimer in |
| 20 | * the documentation and/or other materials provided with the |
| 21 | * distribution. |
| 22 | * |
| 23 | * THE SOFTWARE IS PROVIDED "AS IS" AND COMPAQ COMPUTER CORPORATION |
| 24 | * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING |
| 25 | * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO |
| 26 | * EVENT SHALL COMPAQ COMPUTER CORPORATION BE LIABLE FOR ANY |
| 27 | * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 28 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN |
| 29 | * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING |
| 30 | * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
| 31 | * SOFTWARE. |
| 32 | */ |
| 33 | |
| 34 | /* |
| 35 | * parsenfsfh.c - portable parser for NFS file handles |
| 36 | * uses all sorts of heuristics |
| 37 | * |
| 38 | * Jeffrey C. Mogul |
| 39 | * Digital Equipment Corporation |
| 40 | * Western Research Laboratory |
| 41 | */ |
| 42 | |
Elliott Hughes | 892a68b | 2015-10-19 14:43:53 -0700 | [diff] [blame] | 43 | #define NETDISSECT_REWORKED |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 44 | #ifdef HAVE_CONFIG_H |
| 45 | #include "config.h" |
| 46 | #endif |
| 47 | |
| 48 | #include <tcpdump-stdinc.h> |
| 49 | |
| 50 | #include <stdio.h> |
| 51 | #include <string.h> |
| 52 | |
| 53 | #include "interface.h" |
| 54 | #include "nfsfh.h" |
| 55 | |
| 56 | /* |
| 57 | * This routine attempts to parse a file handle (in network byte order), |
| 58 | * using heuristics to guess what kind of format it is in. See the |
| 59 | * file "fhandle_layouts" for a detailed description of the various |
| 60 | * patterns we know about. |
| 61 | * |
| 62 | * The file handle is parsed into our internal representation of a |
| 63 | * file-system id, and an internal representation of an inode-number. |
| 64 | */ |
| 65 | |
| 66 | #define FHT_UNKNOWN 0 |
| 67 | #define FHT_AUSPEX 1 |
| 68 | #define FHT_DECOSF 2 |
| 69 | #define FHT_IRIX4 3 |
| 70 | #define FHT_IRIX5 4 |
| 71 | #define FHT_SUNOS3 5 |
| 72 | #define FHT_SUNOS4 6 |
| 73 | #define FHT_ULTRIX 7 |
| 74 | #define FHT_VMSUCX 8 |
| 75 | #define FHT_SUNOS5 9 |
| 76 | #define FHT_AIX32 10 |
| 77 | #define FHT_HPUX9 11 |
| 78 | #define FHT_BSD44 12 |
| 79 | |
| 80 | #ifdef ultrix |
| 81 | /* Nasty hack to keep the Ultrix C compiler from emitting bogus warnings */ |
Elliott Hughes | 892a68b | 2015-10-19 14:43:53 -0700 | [diff] [blame] | 82 | #define XFF(x) ((uint32_t)(x)) |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 83 | #else |
| 84 | #define XFF(x) (x) |
| 85 | #endif |
| 86 | |
| 87 | #define make_uint32(msb,b,c,lsb)\ |
| 88 | (XFF(lsb) + (XFF(c)<<8) + (XFF(b)<<16) + (XFF(msb)<<24)) |
| 89 | |
| 90 | #define make_uint24(msb,b, lsb)\ |
| 91 | (XFF(lsb) + (XFF(b)<<8) + (XFF(msb)<<16)) |
| 92 | |
| 93 | #define make_uint16(msb,lsb)\ |
| 94 | (XFF(lsb) + (XFF(msb)<<8)) |
| 95 | |
| 96 | #ifdef __alpha |
| 97 | /* or other 64-bit systems */ |
| 98 | #define make_uint48(msb,b,c,d,e,lsb)\ |
| 99 | ((lsb) + ((e)<<8) + ((d)<<16) + ((c)<<24) + ((b)<<32) + ((msb)<<40)) |
| 100 | #else |
| 101 | /* on 32-bit systems ignore high-order bits */ |
| 102 | #define make_uint48(msb,b,c,d,e,lsb)\ |
| 103 | ((lsb) + ((e)<<8) + ((d)<<16) + ((c)<<24)) |
| 104 | #endif |
| 105 | |
| 106 | static int is_UCX(const unsigned char *); |
| 107 | |
| 108 | void |
Elliott Hughes | 892a68b | 2015-10-19 14:43:53 -0700 | [diff] [blame] | 109 | Parse_fh(register const unsigned char *fh, int len _U_, my_fsid *fsidp, |
| 110 | uint32_t *inop, |
| 111 | const char **osnamep, /* if non-NULL, return OS name here */ |
| 112 | const char **fsnamep, /* if non-NULL, return server fs name here (for VMS) */ |
| 113 | int ourself) /* true if file handle was generated on this host */ |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 114 | { |
| 115 | register const unsigned char *fhp = fh; |
Elliott Hughes | 892a68b | 2015-10-19 14:43:53 -0700 | [diff] [blame] | 116 | uint32_t temp; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 117 | int fhtype = FHT_UNKNOWN; |
| 118 | int i; |
| 119 | |
| 120 | if (ourself) { |
| 121 | /* File handle generated on this host, no need for guessing */ |
| 122 | #if defined(IRIX40) |
| 123 | fhtype = FHT_IRIX4; |
| 124 | #endif |
| 125 | #if defined(IRIX50) |
| 126 | fhtype = FHT_IRIX5; |
| 127 | #endif |
| 128 | #if defined(IRIX51) |
| 129 | fhtype = FHT_IRIX5; |
| 130 | #endif |
| 131 | #if defined(SUNOS4) |
| 132 | fhtype = FHT_SUNOS4; |
| 133 | #endif |
| 134 | #if defined(SUNOS5) |
| 135 | fhtype = FHT_SUNOS5; |
| 136 | #endif |
| 137 | #if defined(ultrix) |
| 138 | fhtype = FHT_ULTRIX; |
| 139 | #endif |
| 140 | #if defined(__osf__) |
| 141 | fhtype = FHT_DECOSF; |
| 142 | #endif |
| 143 | #if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__) \ |
| 144 | || defined(__OpenBSD__) |
| 145 | fhtype = FHT_BSD44; |
| 146 | #endif |
| 147 | } |
| 148 | /* |
| 149 | * This is basically a big decision tree |
| 150 | */ |
| 151 | else if ((fhp[0] == 0) && (fhp[1] == 0)) { |
| 152 | /* bytes[0,1] == (0,0); rules out Ultrix, IRIX5, SUNOS5 */ |
| 153 | /* probably rules out HP-UX, AIX unless they allow major=0 */ |
| 154 | if ((fhp[2] == 0) && (fhp[3] == 0)) { |
| 155 | /* bytes[2,3] == (0,0); must be Auspex */ |
| 156 | /* XXX or could be Ultrix+MASSBUS "hp" disk? */ |
| 157 | fhtype = FHT_AUSPEX; |
| 158 | } |
| 159 | else { |
| 160 | /* |
| 161 | * bytes[2,3] != (0,0); rules out Auspex, could be |
| 162 | * DECOSF, SUNOS4, or IRIX4 |
| 163 | */ |
| 164 | if ((fhp[4] != 0) && (fhp[5] == 0) && |
| 165 | (fhp[8] == 12) && (fhp[9] == 0)) { |
| 166 | /* seems to be DECOSF, with minor == 0 */ |
| 167 | fhtype = FHT_DECOSF; |
| 168 | } |
| 169 | else { |
| 170 | /* could be SUNOS4 or IRIX4 */ |
| 171 | /* XXX the test of fhp[5] == 8 could be wrong */ |
| 172 | if ((fhp[4] == 0) && (fhp[5] == 8) && (fhp[6] == 0) && |
| 173 | (fhp[7] == 0)) { |
| 174 | /* looks like a length, not a file system typecode */ |
| 175 | fhtype = FHT_IRIX4; |
| 176 | } |
| 177 | else { |
| 178 | /* by elimination */ |
| 179 | fhtype = FHT_SUNOS4; |
| 180 | } |
| 181 | } |
| 182 | } |
| 183 | } |
| 184 | else { |
| 185 | /* |
| 186 | * bytes[0,1] != (0,0); rules out Auspex, IRIX4, SUNOS4 |
| 187 | * could be IRIX5, DECOSF, UCX, Ultrix, SUNOS5 |
| 188 | * could be AIX, HP-UX |
| 189 | */ |
| 190 | if ((fhp[2] == 0) && (fhp[3] == 0)) { |
| 191 | /* |
| 192 | * bytes[2,3] == (0,0); rules out OSF, probably not UCX |
| 193 | * (unless the exported device name is just one letter!), |
| 194 | * could be Ultrix, IRIX5, AIX, or SUNOS5 |
| 195 | * might be HP-UX (depends on their values for minor devs) |
| 196 | */ |
| 197 | if ((fhp[6] == 0) && (fhp[7] == 0)) { |
| 198 | fhtype = FHT_BSD44; |
| 199 | } |
| 200 | /*XXX we probably only need to test of these two bytes */ |
| 201 | else if ((fhp[21] == 0) && (fhp[23] == 0)) { |
| 202 | fhtype = FHT_ULTRIX; |
| 203 | } |
| 204 | else { |
| 205 | /* Could be SUNOS5/IRIX5, maybe AIX */ |
| 206 | /* XXX no obvious difference between SUNOS5 and IRIX5 */ |
| 207 | if (fhp[9] == 10) |
| 208 | fhtype = FHT_SUNOS5; |
| 209 | /* XXX what about AIX? */ |
| 210 | } |
| 211 | } |
| 212 | else { |
| 213 | /* |
| 214 | * bytes[2,3] != (0,0); rules out Ultrix, could be |
| 215 | * DECOSF, SUNOS5, IRIX5, AIX, HP-UX, or UCX |
| 216 | */ |
| 217 | if ((fhp[8] == 12) && (fhp[9] == 0)) { |
| 218 | fhtype = FHT_DECOSF; |
| 219 | } |
| 220 | else if ((fhp[8] == 0) && (fhp[9] == 10)) { |
| 221 | /* could be SUNOS5/IRIX5, AIX, HP-UX */ |
| 222 | if ((fhp[7] == 0) && (fhp[6] == 0) && |
| 223 | (fhp[5] == 0) && (fhp[4] == 0)) { |
| 224 | /* XXX is this always true of HP-UX? */ |
| 225 | fhtype = FHT_HPUX9; |
| 226 | } |
| 227 | else if (fhp[7] == 2) { |
| 228 | /* This would be MNT_NFS on AIX, which is impossible */ |
| 229 | fhtype = FHT_SUNOS5; /* or maybe IRIX5 */ |
| 230 | } |
| 231 | else { |
| 232 | /* |
| 233 | * XXX Could be SUNOS5/IRIX5 or AIX. I don't |
| 234 | * XXX see any way to disambiguate these, so |
| 235 | * XXX I'm going with the more likely guess. |
| 236 | * XXX Sorry, Big Blue. |
| 237 | */ |
| 238 | fhtype = FHT_SUNOS5; /* or maybe IRIX5 */ |
| 239 | } |
| 240 | } |
| 241 | else { |
| 242 | if (is_UCX(fhp)) { |
| 243 | fhtype = FHT_VMSUCX; |
| 244 | } |
| 245 | else { |
| 246 | fhtype = FHT_UNKNOWN; |
| 247 | } |
| 248 | } |
| 249 | } |
| 250 | } |
| 251 | |
| 252 | /* XXX still needs to handle SUNOS3 */ |
| 253 | |
| 254 | switch (fhtype) { |
| 255 | case FHT_AUSPEX: |
| 256 | fsidp->Fsid_dev.Minor = fhp[7]; |
| 257 | fsidp->Fsid_dev.Major = fhp[6]; |
| 258 | fsidp->fsid_code = 0; |
| 259 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 260 | *inop = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 261 | |
| 262 | if (osnamep) |
| 263 | *osnamep = "Auspex"; |
| 264 | break; |
| 265 | |
| 266 | case FHT_BSD44: |
| 267 | fsidp->Fsid_dev.Minor = fhp[0]; |
| 268 | fsidp->Fsid_dev.Major = fhp[1]; |
| 269 | fsidp->fsid_code = 0; |
| 270 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 271 | *inop = make_uint32(fhp[15], fhp[14], fhp[13], fhp[12]); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 272 | |
| 273 | if (osnamep) |
| 274 | *osnamep = "BSD 4.4"; |
| 275 | break; |
| 276 | |
| 277 | case FHT_DECOSF: |
| 278 | fsidp->fsid_code = make_uint32(fhp[7], fhp[6], fhp[5], fhp[4]); |
| 279 | /* XXX could ignore 3 high-order bytes */ |
| 280 | |
| 281 | temp = make_uint32(fhp[3], fhp[2], fhp[1], fhp[0]); |
| 282 | fsidp->Fsid_dev.Minor = temp & 0xFFFFF; |
| 283 | fsidp->Fsid_dev.Major = (temp>>20) & 0xFFF; |
| 284 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 285 | *inop = make_uint32(fhp[15], fhp[14], fhp[13], fhp[12]); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 286 | if (osnamep) |
| 287 | *osnamep = "OSF"; |
| 288 | break; |
| 289 | |
| 290 | case FHT_IRIX4: |
| 291 | fsidp->Fsid_dev.Minor = fhp[3]; |
| 292 | fsidp->Fsid_dev.Major = fhp[2]; |
| 293 | fsidp->fsid_code = 0; |
| 294 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 295 | *inop = make_uint32(fhp[8], fhp[9], fhp[10], fhp[11]); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 296 | |
| 297 | if (osnamep) |
| 298 | *osnamep = "IRIX4"; |
| 299 | break; |
| 300 | |
| 301 | case FHT_IRIX5: |
| 302 | fsidp->Fsid_dev.Minor = make_uint16(fhp[2], fhp[3]); |
| 303 | fsidp->Fsid_dev.Major = make_uint16(fhp[0], fhp[1]); |
| 304 | fsidp->fsid_code = make_uint32(fhp[4], fhp[5], fhp[6], fhp[7]); |
| 305 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 306 | *inop = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 307 | |
| 308 | if (osnamep) |
| 309 | *osnamep = "IRIX5"; |
| 310 | break; |
| 311 | |
| 312 | #ifdef notdef |
| 313 | case FHT_SUNOS3: |
| 314 | /* |
| 315 | * XXX - none of the heuristics above return this. |
| 316 | * Are there any SunOS 3.x systems around to care about? |
| 317 | */ |
| 318 | if (osnamep) |
| 319 | *osnamep = "SUNOS3"; |
| 320 | break; |
| 321 | #endif |
| 322 | |
| 323 | case FHT_SUNOS4: |
| 324 | fsidp->Fsid_dev.Minor = fhp[3]; |
| 325 | fsidp->Fsid_dev.Major = fhp[2]; |
| 326 | fsidp->fsid_code = make_uint32(fhp[4], fhp[5], fhp[6], fhp[7]); |
| 327 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 328 | *inop = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 329 | |
| 330 | if (osnamep) |
| 331 | *osnamep = "SUNOS4"; |
| 332 | break; |
| 333 | |
| 334 | case FHT_SUNOS5: |
| 335 | temp = make_uint16(fhp[0], fhp[1]); |
| 336 | fsidp->Fsid_dev.Major = (temp>>2) & 0x3FFF; |
| 337 | temp = make_uint24(fhp[1], fhp[2], fhp[3]); |
| 338 | fsidp->Fsid_dev.Minor = temp & 0x3FFFF; |
| 339 | fsidp->fsid_code = make_uint32(fhp[4], fhp[5], fhp[6], fhp[7]); |
| 340 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 341 | *inop = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 342 | |
| 343 | if (osnamep) |
| 344 | *osnamep = "SUNOS5"; |
| 345 | break; |
| 346 | |
| 347 | case FHT_ULTRIX: |
| 348 | fsidp->fsid_code = 0; |
| 349 | fsidp->Fsid_dev.Minor = fhp[0]; |
| 350 | fsidp->Fsid_dev.Major = fhp[1]; |
| 351 | |
| 352 | temp = make_uint32(fhp[7], fhp[6], fhp[5], fhp[4]); |
| 353 | *inop = temp; |
| 354 | if (osnamep) |
| 355 | *osnamep = "Ultrix"; |
| 356 | break; |
| 357 | |
| 358 | case FHT_VMSUCX: |
| 359 | /* No numeric file system ID, so hash on the device-name */ |
| 360 | if (sizeof(*fsidp) >= 14) { |
| 361 | if (sizeof(*fsidp) > 14) |
| 362 | memset((char *)fsidp, 0, sizeof(*fsidp)); |
| 363 | /* just use the whole thing */ |
| 364 | memcpy((char *)fsidp, (char *)fh, 14); |
| 365 | } |
| 366 | else { |
Elliott Hughes | 892a68b | 2015-10-19 14:43:53 -0700 | [diff] [blame] | 367 | uint32_t tempa[4]; /* at least 16 bytes, maybe more */ |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 368 | |
| 369 | memset((char *)tempa, 0, sizeof(tempa)); |
| 370 | memcpy((char *)tempa, (char *)fh, 14); /* ensure alignment */ |
| 371 | fsidp->Fsid_dev.Minor = tempa[0] + (tempa[1]<<1); |
| 372 | fsidp->Fsid_dev.Major = tempa[2] + (tempa[3]<<1); |
| 373 | fsidp->fsid_code = 0; |
| 374 | } |
| 375 | |
| 376 | /* VMS file ID is: (RVN, FidHi, FidLo) */ |
| 377 | *inop = make_uint32(fhp[26], fhp[27], fhp[23], fhp[22]); |
| 378 | |
| 379 | /* Caller must save (and null-terminate?) this value */ |
| 380 | if (fsnamep) |
| 381 | *fsnamep = (char *)&(fhp[1]); |
| 382 | |
| 383 | if (osnamep) |
| 384 | *osnamep = "VMS"; |
| 385 | break; |
| 386 | |
| 387 | case FHT_AIX32: |
| 388 | fsidp->Fsid_dev.Minor = make_uint16(fhp[2], fhp[3]); |
| 389 | fsidp->Fsid_dev.Major = make_uint16(fhp[0], fhp[1]); |
| 390 | fsidp->fsid_code = make_uint32(fhp[4], fhp[5], fhp[6], fhp[7]); |
| 391 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 392 | *inop = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 393 | |
| 394 | if (osnamep) |
| 395 | *osnamep = "AIX32"; |
| 396 | break; |
| 397 | |
| 398 | case FHT_HPUX9: |
| 399 | fsidp->Fsid_dev.Major = fhp[0]; |
| 400 | temp = make_uint24(fhp[1], fhp[2], fhp[3]); |
| 401 | fsidp->Fsid_dev.Minor = temp; |
| 402 | fsidp->fsid_code = make_uint32(fhp[4], fhp[5], fhp[6], fhp[7]); |
| 403 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 404 | *inop = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 405 | |
| 406 | if (osnamep) |
| 407 | *osnamep = "HPUX9"; |
| 408 | break; |
| 409 | |
| 410 | case FHT_UNKNOWN: |
| 411 | #ifdef DEBUG |
| 412 | /* XXX debugging */ |
| 413 | for (i = 0; i < 32; i++) |
| 414 | (void)fprintf(stderr, "%x.", fhp[i]); |
| 415 | (void)fprintf(stderr, "\n"); |
| 416 | #endif |
| 417 | /* Save the actual handle, so it can be display with -u */ |
| 418 | for (i = 0; i < 32; i++) |
| 419 | (void)snprintf(&(fsidp->Opaque_Handle[i*2]), 3, "%.2X", fhp[i]); |
| 420 | |
| 421 | /* XXX for now, give "bogus" values to aid debugging */ |
| 422 | fsidp->fsid_code = 0; |
| 423 | fsidp->Fsid_dev.Minor = 257; |
| 424 | fsidp->Fsid_dev.Major = 257; |
| 425 | *inop = 1; |
| 426 | |
| 427 | /* display will show this string instead of (257,257) */ |
| 428 | if (fsnamep) |
| 429 | *fsnamep = "Unknown"; |
| 430 | |
| 431 | if (osnamep) |
| 432 | *osnamep = "Unknown"; |
| 433 | break; |
| 434 | |
| 435 | } |
| 436 | } |
| 437 | |
| 438 | /* |
| 439 | * Is this a VMS UCX file handle? |
| 440 | * Check for: |
| 441 | * (1) leading code byte [XXX not yet] |
| 442 | * (2) followed by string of printing chars & spaces |
| 443 | * (3) followed by string of nulls |
| 444 | */ |
| 445 | static int |
Elliott Hughes | 892a68b | 2015-10-19 14:43:53 -0700 | [diff] [blame] | 446 | is_UCX(const unsigned char *fhp) |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 447 | { |
| 448 | register int i; |
| 449 | int seen_null = 0; |
| 450 | |
| 451 | for (i = 1; i < 14; i++) { |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 452 | if (ND_ISPRINT(fhp[i])) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 453 | if (seen_null) |
| 454 | return(0); |
| 455 | else |
| 456 | continue; |
| 457 | } |
| 458 | else if (fhp[i] == 0) { |
| 459 | seen_null = 1; |
| 460 | continue; |
| 461 | } |
| 462 | else |
| 463 | return(0); |
| 464 | } |
| 465 | |
| 466 | return(1); |
| 467 | } |