| 1 | /* $Id: redirect.c 2839 2016-08-25 21:46:44Z bird $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * kmk_redirect - Do simple program <-> file redirection (++).
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (c) 2007-2016 knut st. osmundsen <bird-kBuild-spamx@anduin.net>
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of kBuild.
|
|---|
| 10 | *
|
|---|
| 11 | * kBuild is free software; you can redistribute it and/or modify
|
|---|
| 12 | * it under the terms of the GNU General Public License as published by
|
|---|
| 13 | * the Free Software Foundation; either version 3 of the License, or
|
|---|
| 14 | * (at your option) any later version.
|
|---|
| 15 | *
|
|---|
| 16 | * kBuild is distributed in the hope that it will be useful,
|
|---|
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|---|
| 19 | * GNU General Public License for more details.
|
|---|
| 20 | *
|
|---|
| 21 | * You should have received a copy of the GNU General Public License
|
|---|
| 22 | * along with kBuild. If not, see <http://www.gnu.org/licenses/>
|
|---|
| 23 | *
|
|---|
| 24 | */
|
|---|
| 25 |
|
|---|
| 26 | /*******************************************************************************
|
|---|
| 27 | * Header Files *
|
|---|
| 28 | *******************************************************************************/
|
|---|
| 29 | #ifdef __APPLE__
|
|---|
| 30 | # define _POSIX_C_SOURCE 1 /* 10.4 sdk and unsetenv */
|
|---|
| 31 | #endif
|
|---|
| 32 | #include "config.h"
|
|---|
| 33 | #include <stdio.h>
|
|---|
| 34 | #include <stdlib.h>
|
|---|
| 35 | #include <string.h>
|
|---|
| 36 | #include <errno.h>
|
|---|
| 37 | #include <fcntl.h>
|
|---|
| 38 | #if defined(_MSC_VER)
|
|---|
| 39 | # include <ctype.h>
|
|---|
| 40 | # include <io.h>
|
|---|
| 41 | # include <direct.h>
|
|---|
| 42 | # include <process.h>
|
|---|
| 43 | # include "quote_argv.h"
|
|---|
| 44 | #else
|
|---|
| 45 | # include <unistd.h>
|
|---|
| 46 | #endif
|
|---|
| 47 |
|
|---|
| 48 | #ifdef __OS2__
|
|---|
| 49 | # define INCL_BASE
|
|---|
| 50 | # include <os2.h>
|
|---|
| 51 | # ifndef LIBPATHSTRICT
|
|---|
| 52 | # define LIBPATHSTRICT 3
|
|---|
| 53 | # endif
|
|---|
| 54 | #endif
|
|---|
| 55 |
|
|---|
| 56 |
|
|---|
| 57 | /*********************************************************************************************************************************
|
|---|
| 58 | * Global Variables *
|
|---|
| 59 | *********************************************************************************************************************************/
|
|---|
| 60 | /** Number of times the '-v' switch was seen. */
|
|---|
| 61 | static unsigned g_cVerbosity = 0;
|
|---|
| 62 |
|
|---|
| 63 |
|
|---|
| 64 | #if defined(_MSC_VER)
|
|---|
| 65 |
|
|---|
| 66 |
|
|---|
| 67 | /** Used by safeCloseFd. */
|
|---|
| 68 | static void __cdecl ignore_invalid_parameter(const wchar_t *a, const wchar_t *b, const wchar_t *c, unsigned d, uintptr_t e)
|
|---|
| 69 | {
|
|---|
| 70 | }
|
|---|
| 71 |
|
|---|
| 72 | #endif /* _MSC_VER */
|
|---|
| 73 |
|
|---|
| 74 |
|
|---|
| 75 | /**
|
|---|
| 76 | * Safely works around MS CRT's pedantic close() function.
|
|---|
| 77 | *
|
|---|
| 78 | * @param fd The file handle.
|
|---|
| 79 | */
|
|---|
| 80 | static void safeCloseFd(int fd)
|
|---|
| 81 | {
|
|---|
| 82 | #ifdef _MSC_VER
|
|---|
| 83 | _invalid_parameter_handler pfnOld = _get_invalid_parameter_handler();
|
|---|
| 84 | _set_invalid_parameter_handler(ignore_invalid_parameter);
|
|---|
| 85 | close(fd);
|
|---|
| 86 | _set_invalid_parameter_handler(pfnOld);
|
|---|
| 87 | #else
|
|---|
| 88 | close(fd);
|
|---|
| 89 | #endif
|
|---|
| 90 | }
|
|---|
| 91 |
|
|---|
| 92 |
|
|---|
| 93 | static const char *name(const char *pszName)
|
|---|
| 94 | {
|
|---|
| 95 | const char *psz = strrchr(pszName, '/');
|
|---|
| 96 | #if defined(_MSC_VER) || defined(__OS2__)
|
|---|
| 97 | const char *psz2 = strrchr(pszName, '\\');
|
|---|
| 98 | if (!psz2)
|
|---|
| 99 | psz2 = strrchr(pszName, ':');
|
|---|
| 100 | if (psz2 && (!psz || psz2 > psz))
|
|---|
| 101 | psz = psz2;
|
|---|
| 102 | #endif
|
|---|
| 103 | return psz ? psz + 1 : pszName;
|
|---|
| 104 | }
|
|---|
| 105 |
|
|---|
| 106 |
|
|---|
| 107 | static int usage(FILE *pOut, const char *argv0)
|
|---|
| 108 | {
|
|---|
| 109 | fprintf(pOut,
|
|---|
| 110 | "usage: %s [-[rwa+tb]<fd> <file>] [-c<fd>] [-Z] [-E <var=val>] [-C <dir>] [--wcc-brain-damage] [-v] -- <program> [args]\n"
|
|---|
| 111 | " or: %s --help\n"
|
|---|
| 112 | " or: %s --version\n"
|
|---|
| 113 | "\n"
|
|---|
| 114 | "The rwa+tb is like for fopen, if not specified it defaults to w+.\n"
|
|---|
| 115 | "The <fd> is either a number or an alias for the standard handles:\n"
|
|---|
| 116 | " i = stdin\n"
|
|---|
| 117 | " o = stdout\n"
|
|---|
| 118 | " e = stderr\n"
|
|---|
| 119 | "\n"
|
|---|
| 120 | "The -c switch will close the specified file descriptor.\n"
|
|---|
| 121 | "\n"
|
|---|
| 122 | "The -Z switch zaps the environment.\n"
|
|---|
| 123 | "\n"
|
|---|
| 124 | "The -E switch is for making changes to the environment in a putenv\n"
|
|---|
| 125 | "fashion.\n"
|
|---|
| 126 | "\n"
|
|---|
| 127 | "The -C switch is for changing the current directory. This takes immediate\n"
|
|---|
| 128 | "effect, so be careful where you put it.\n"
|
|---|
| 129 | "\n"
|
|---|
| 130 | "The --wcc-brain-damage switch is to work around wcc and wcc386 (Open Watcom)\n"
|
|---|
| 131 | "not following normal quoting conventions on Windows, OS/2, and DOS.\n"
|
|---|
| 132 | "\n"
|
|---|
| 133 | "The -v switch is for making the thing more verbose.\n"
|
|---|
| 134 | "\n"
|
|---|
| 135 | "This command was originally just a quick hack to avoid invoking the shell\n"
|
|---|
| 136 | "on Windows (cygwin) where forking is very expensive and has exhibited\n"
|
|---|
| 137 | "stability issues on SMP machines. It has since grown into something like\n"
|
|---|
| 138 | "/usr/bin/env on steroids.\n"
|
|---|
| 139 | ,
|
|---|
| 140 | argv0, argv0, argv0);
|
|---|
| 141 | return 1;
|
|---|
| 142 | }
|
|---|
| 143 |
|
|---|
| 144 |
|
|---|
| 145 | int main(int argc, char **argv, char **envp)
|
|---|
| 146 | {
|
|---|
| 147 | int i;
|
|---|
| 148 | int j;
|
|---|
| 149 | #if defined(_MSC_VER)
|
|---|
| 150 | intptr_t rc;
|
|---|
| 151 | #endif
|
|---|
| 152 | FILE *pStdErr = stderr;
|
|---|
| 153 | FILE *pStdOut = stdout;
|
|---|
| 154 | int fWatcomBrainDamage = 0;
|
|---|
| 155 |
|
|---|
| 156 | /*
|
|---|
| 157 | * Parse arguments.
|
|---|
| 158 | */
|
|---|
| 159 | if (argc <= 1)
|
|---|
| 160 | return usage(pStdErr, name(argv[0]));
|
|---|
| 161 | for (i = 1; i < argc; i++)
|
|---|
| 162 | {
|
|---|
| 163 | if (argv[i][0] == '-')
|
|---|
| 164 | {
|
|---|
| 165 | int fd;
|
|---|
| 166 | int fdOpened;
|
|---|
| 167 | int fOpen;
|
|---|
| 168 | char *psz = &argv[i][1];
|
|---|
| 169 | if (*psz == '-')
|
|---|
| 170 | {
|
|---|
| 171 | /* '--' ? */
|
|---|
| 172 | if (!psz[1])
|
|---|
| 173 | {
|
|---|
| 174 | i++;
|
|---|
| 175 | break;
|
|---|
| 176 | }
|
|---|
| 177 |
|
|---|
| 178 | /* convert to short. */
|
|---|
| 179 | if (!strcmp(psz, "-help"))
|
|---|
| 180 | psz = "h";
|
|---|
| 181 | else if (!strcmp(psz, "-version"))
|
|---|
| 182 | psz = "V";
|
|---|
| 183 | else if (!strcmp(psz, "-env"))
|
|---|
| 184 | psz = "E";
|
|---|
| 185 | else if (!strcmp(psz, "-chdir"))
|
|---|
| 186 | psz = "C";
|
|---|
| 187 | else if (!strcmp(psz, "-zap-env"))
|
|---|
| 188 | psz = "Z";
|
|---|
| 189 | else if (!strcmp(psz, "-close"))
|
|---|
| 190 | psz = "c";
|
|---|
| 191 | else if (!strcmp(psz, "-wcc-brain-damage"))
|
|---|
| 192 | {
|
|---|
| 193 | fWatcomBrainDamage = 1;
|
|---|
| 194 | continue;
|
|---|
| 195 | }
|
|---|
| 196 | }
|
|---|
| 197 |
|
|---|
| 198 | /*
|
|---|
| 199 | * Deal with the obligatory help and version switches first.
|
|---|
| 200 | */
|
|---|
| 201 | if (*psz == 'h')
|
|---|
| 202 | {
|
|---|
| 203 | usage(pStdOut, name(argv[0]));
|
|---|
| 204 | return 0;
|
|---|
| 205 | }
|
|---|
| 206 | if (*psz == 'V')
|
|---|
| 207 | {
|
|---|
| 208 | printf("kmk_redirect - kBuild version %d.%d.%d (r%u)\n"
|
|---|
| 209 | "Copyright (C) 2007-2012 knut st. osmundsen\n",
|
|---|
| 210 | KBUILD_VERSION_MAJOR, KBUILD_VERSION_MINOR, KBUILD_VERSION_PATCH,
|
|---|
| 211 | KBUILD_SVN_REV);
|
|---|
| 212 | return 0;
|
|---|
| 213 | }
|
|---|
| 214 |
|
|---|
| 215 | /*
|
|---|
| 216 | * Environment switch?
|
|---|
| 217 | */
|
|---|
| 218 | if (*psz == 'E')
|
|---|
| 219 | {
|
|---|
| 220 | psz++;
|
|---|
| 221 | if (*psz == ':' || *psz == '=')
|
|---|
| 222 | psz++;
|
|---|
| 223 | else
|
|---|
| 224 | {
|
|---|
| 225 | if (i + 1 >= argc)
|
|---|
| 226 | {
|
|---|
| 227 | fprintf(pStdErr, "%s: syntax error: no argument for %s\n", name(argv[0]), argv[i]);
|
|---|
| 228 | return 1;
|
|---|
| 229 | }
|
|---|
| 230 | psz = argv[++i];
|
|---|
| 231 | }
|
|---|
| 232 | #ifdef __OS2__
|
|---|
| 233 | if ( !strncmp(psz, "BEGINLIBPATH=", sizeof("BEGINLIBPATH=") - 1)
|
|---|
| 234 | || !strncmp(psz, "ENDLIBPATH=", sizeof("ENDLIBPATH=") - 1)
|
|---|
| 235 | || !strncmp(psz, "LIBPATHSTRICT=", sizeof("LIBPATHSTRICT=") - 1))
|
|---|
| 236 | {
|
|---|
| 237 | ULONG ulVar = *psz == 'B' ? BEGIN_LIBPATH
|
|---|
| 238 | : *psz == 'E' ? END_LIBPATH
|
|---|
| 239 | : LIBPATHSTRICT;
|
|---|
| 240 | const char *pszVal = strchr(psz, '=') + 1;
|
|---|
| 241 | APIRET rc = DosSetExtLIBPATH(pszVal, ulVar);
|
|---|
| 242 | if (rc)
|
|---|
| 243 | {
|
|---|
| 244 | fprintf(pStdErr, "%s: error: DosSetExtLibPath(\"%s\", %.*s (%lu)): %lu\n",
|
|---|
| 245 | name(argv[0]), pszVal, pszVal - psz - 1, psz, ulVar, rc);
|
|---|
| 246 | return 1;
|
|---|
| 247 | }
|
|---|
| 248 | }
|
|---|
| 249 | else
|
|---|
| 250 | #endif /* __OS2__ */
|
|---|
| 251 | {
|
|---|
| 252 | const char *pchEqual = strchr(psz, '=');
|
|---|
| 253 | if (pchEqual && pchEqual[1] != '\0')
|
|---|
| 254 | {
|
|---|
| 255 | if (putenv(psz))
|
|---|
| 256 | {
|
|---|
| 257 | fprintf(pStdErr, "%s: error: putenv(\"%s\"): %s\n", name(argv[0]), psz, strerror(errno));
|
|---|
| 258 | return 1;
|
|---|
| 259 | }
|
|---|
| 260 | }
|
|---|
| 261 | else
|
|---|
| 262 | {
|
|---|
| 263 | size_t cchVar = pchEqual ? (size_t)(pchEqual - psz) : strlen(psz);
|
|---|
| 264 | char *pszCopy = (char *)malloc(cchVar + 2);
|
|---|
| 265 | memcpy(pszCopy, psz, cchVar);
|
|---|
| 266 |
|
|---|
| 267 | #if defined(_MSC_VER) || defined(__OS2__)
|
|---|
| 268 | pszCopy[cchVar] = '=';
|
|---|
| 269 | pszCopy[cchVar + 1] = '\0';
|
|---|
| 270 | if (putenv(pszCopy))
|
|---|
| 271 | {
|
|---|
| 272 | fprintf(pStdErr, "%s: error: putenv(\"%s\"): %s\n", name(argv[0]), pszCopy, strerror(errno));
|
|---|
| 273 | return 1;
|
|---|
| 274 | }
|
|---|
| 275 | #else
|
|---|
| 276 | pszCopy[cchVar] = '\0';
|
|---|
| 277 | if (unsetenv(pszCopy))
|
|---|
| 278 | {
|
|---|
| 279 | fprintf(pStdErr, "%s: error: unsetenv(\"%s\"): %s\n", name(argv[0]), pszCopy, strerror(errno));
|
|---|
| 280 | return 1;
|
|---|
| 281 | }
|
|---|
| 282 | #endif
|
|---|
| 283 | free(pszCopy);
|
|---|
| 284 | }
|
|---|
| 285 | }
|
|---|
| 286 | continue;
|
|---|
| 287 | }
|
|---|
| 288 |
|
|---|
| 289 | /*
|
|---|
| 290 | * Change directory switch?
|
|---|
| 291 | */
|
|---|
| 292 | if (*psz == 'C')
|
|---|
| 293 | {
|
|---|
| 294 | psz++;
|
|---|
| 295 | if (*psz == ':' || *psz == '=')
|
|---|
| 296 | psz++;
|
|---|
| 297 | else
|
|---|
| 298 | {
|
|---|
| 299 | if (i + 1 >= argc)
|
|---|
| 300 | {
|
|---|
| 301 | fprintf(pStdErr, "%s: syntax error: no argument for %s\n", name(argv[0]), argv[i]);
|
|---|
| 302 | return 1;
|
|---|
| 303 | }
|
|---|
| 304 | psz = argv[++i];
|
|---|
| 305 | }
|
|---|
| 306 | if (!chdir(psz))
|
|---|
| 307 | continue;
|
|---|
| 308 | #ifdef _MSC_VER
|
|---|
| 309 | {
|
|---|
| 310 | /* drop trailing slash if any. */
|
|---|
| 311 | size_t cch = strlen(psz);
|
|---|
| 312 | if ( cch > 2
|
|---|
| 313 | && (psz[cch - 1] == '/' || psz[cch - 1] == '\\')
|
|---|
| 314 | && psz[cch - 1] != ':')
|
|---|
| 315 | {
|
|---|
| 316 | int rc2;
|
|---|
| 317 | char *pszCopy = strdup(psz);
|
|---|
| 318 | do pszCopy[--cch] = '\0';
|
|---|
| 319 | while ( cch > 2
|
|---|
| 320 | && (pszCopy[cch - 1] == '/' || pszCopy[cch - 1] == '\\')
|
|---|
| 321 | && pszCopy[cch - 1] != ':');
|
|---|
| 322 | rc2 = chdir(pszCopy);
|
|---|
| 323 | free(pszCopy);
|
|---|
| 324 | if (!rc2)
|
|---|
| 325 | continue;
|
|---|
| 326 | }
|
|---|
| 327 | }
|
|---|
| 328 | #endif
|
|---|
| 329 | fprintf(pStdErr, "%s: error: chdir(\"%s\"): %s\n", name(argv[0]), psz, strerror(errno));
|
|---|
| 330 | return 1;
|
|---|
| 331 | }
|
|---|
| 332 |
|
|---|
| 333 | /*
|
|---|
| 334 | * Zap environment switch?
|
|---|
| 335 | * This is a bit of a hack.
|
|---|
| 336 | */
|
|---|
| 337 | if (*psz == 'Z')
|
|---|
| 338 | {
|
|---|
| 339 | unsigned j = 0;
|
|---|
| 340 | while (envp[j] != NULL)
|
|---|
| 341 | j++;
|
|---|
| 342 | while (j-- > 0)
|
|---|
| 343 | {
|
|---|
| 344 | char *pszEqual = strchr(envp[j], '=');
|
|---|
| 345 | char *pszCopy;
|
|---|
| 346 |
|
|---|
| 347 | if (pszEqual)
|
|---|
| 348 | *pszEqual = '\0';
|
|---|
| 349 | pszCopy = strdup(envp[j]);
|
|---|
| 350 | if (pszEqual)
|
|---|
| 351 | *pszEqual = '=';
|
|---|
| 352 |
|
|---|
| 353 | #if defined(_MSC_VER) || defined(__OS2__)
|
|---|
| 354 | putenv(pszCopy);
|
|---|
| 355 | #else
|
|---|
| 356 | unsetenv(pszCopy);
|
|---|
| 357 | #endif
|
|---|
| 358 | free(pszCopy);
|
|---|
| 359 | }
|
|---|
| 360 | continue;
|
|---|
| 361 | }
|
|---|
| 362 |
|
|---|
| 363 | /*
|
|---|
| 364 | * Verbose operation switch?
|
|---|
| 365 | */
|
|---|
| 366 | if (*psz == 'v')
|
|---|
| 367 | {
|
|---|
| 368 | g_cVerbosity++;
|
|---|
| 369 | continue;
|
|---|
| 370 | }
|
|---|
| 371 |
|
|---|
| 372 | /*
|
|---|
| 373 | * Close the specified file descriptor (no stderr/out/in aliases).
|
|---|
| 374 | */
|
|---|
| 375 | if (*psz == 'c')
|
|---|
| 376 | {
|
|---|
| 377 | psz++;
|
|---|
| 378 | if (!*psz)
|
|---|
| 379 | {
|
|---|
| 380 | i++;
|
|---|
| 381 | if (i >= argc)
|
|---|
| 382 | {
|
|---|
| 383 | fprintf(pStdErr, "%s: syntax error: missing filename argument.\n", name(argv[0]));
|
|---|
| 384 | return 1;
|
|---|
| 385 | }
|
|---|
| 386 | psz = argv[i];
|
|---|
| 387 | }
|
|---|
| 388 |
|
|---|
| 389 | fd = (int)strtol(psz, &psz, 0);
|
|---|
| 390 | if (!fd || *psz)
|
|---|
| 391 | {
|
|---|
| 392 | fprintf(pStdErr, "%s: error: failed to convert '%s' to a number\n", name(argv[0]), argv[i]);
|
|---|
| 393 | return 1;
|
|---|
| 394 |
|
|---|
| 395 | }
|
|---|
| 396 | if (fd < 0)
|
|---|
| 397 | {
|
|---|
| 398 | fprintf(pStdErr, "%s: error: negative fd %d (%s)\n", name(argv[0]), fd, argv[i]);
|
|---|
| 399 | return 1;
|
|---|
| 400 | }
|
|---|
| 401 | /** @todo deal with stderr */
|
|---|
| 402 | safeCloseFd(fd);
|
|---|
| 403 | continue;
|
|---|
| 404 | }
|
|---|
| 405 |
|
|---|
| 406 | /*
|
|---|
| 407 | * Parse a file descriptor argument.
|
|---|
| 408 | */
|
|---|
| 409 |
|
|---|
| 410 | /* mode */
|
|---|
| 411 | switch (*psz)
|
|---|
| 412 | {
|
|---|
| 413 | case 'r':
|
|---|
| 414 | psz++;
|
|---|
| 415 | if (*psz == '+')
|
|---|
| 416 | {
|
|---|
| 417 | fOpen = O_RDWR;
|
|---|
| 418 | psz++;
|
|---|
| 419 | }
|
|---|
| 420 | else
|
|---|
| 421 | fOpen = O_RDONLY;
|
|---|
| 422 | break;
|
|---|
| 423 |
|
|---|
| 424 | case 'w':
|
|---|
| 425 | psz++;
|
|---|
| 426 | if (*psz == '+')
|
|---|
| 427 | {
|
|---|
| 428 | psz++;
|
|---|
| 429 | fOpen = O_RDWR | O_CREAT | O_TRUNC;
|
|---|
| 430 | }
|
|---|
| 431 | else
|
|---|
| 432 | fOpen = O_WRONLY | O_CREAT | O_TRUNC;
|
|---|
| 433 | break;
|
|---|
| 434 |
|
|---|
| 435 | case 'a':
|
|---|
| 436 | psz++;
|
|---|
| 437 | if (*psz == '+')
|
|---|
| 438 | {
|
|---|
| 439 | psz++;
|
|---|
| 440 | fOpen = O_RDWR | O_CREAT | O_APPEND;
|
|---|
| 441 | }
|
|---|
| 442 | else
|
|---|
| 443 | fOpen = O_WRONLY | O_CREAT | O_APPEND;
|
|---|
| 444 | break;
|
|---|
| 445 |
|
|---|
| 446 | case 'i': /* make sure stdin is read-only. */
|
|---|
| 447 | fOpen = O_RDONLY;
|
|---|
| 448 | break;
|
|---|
| 449 |
|
|---|
| 450 | case '+':
|
|---|
| 451 | fprintf(pStdErr, "%s: syntax error: Unexpected '+' in '%s'\n", name(argv[0]), argv[i]);
|
|---|
| 452 | return 1;
|
|---|
| 453 |
|
|---|
| 454 | default:
|
|---|
| 455 | fOpen = O_RDWR | O_CREAT | O_TRUNC;
|
|---|
| 456 | break;
|
|---|
| 457 | }
|
|---|
| 458 |
|
|---|
| 459 | /* binary / text modifiers */
|
|---|
| 460 | switch (*psz)
|
|---|
| 461 | {
|
|---|
| 462 | case 'b':
|
|---|
| 463 | #ifdef O_BINARY
|
|---|
| 464 | fOpen |= O_BINARY;
|
|---|
| 465 | #endif
|
|---|
| 466 | psz++;
|
|---|
| 467 | break;
|
|---|
| 468 |
|
|---|
| 469 | case 't':
|
|---|
| 470 | #ifdef O_TEXT
|
|---|
| 471 | fOpen |= O_TEXT;
|
|---|
| 472 | #endif
|
|---|
| 473 | psz++;
|
|---|
| 474 | break;
|
|---|
| 475 |
|
|---|
| 476 | default:
|
|---|
| 477 | #ifdef O_BINARY
|
|---|
| 478 | fOpen |= O_BINARY;
|
|---|
| 479 | #endif
|
|---|
| 480 | break;
|
|---|
| 481 |
|
|---|
| 482 | }
|
|---|
| 483 |
|
|---|
| 484 | /* convert to file descriptor number */
|
|---|
| 485 | switch (*psz)
|
|---|
| 486 | {
|
|---|
| 487 | case 'i':
|
|---|
| 488 | fd = 0;
|
|---|
| 489 | psz++;
|
|---|
| 490 | break;
|
|---|
| 491 |
|
|---|
| 492 | case 'o':
|
|---|
| 493 | fd = 1;
|
|---|
| 494 | psz++;
|
|---|
| 495 | break;
|
|---|
| 496 |
|
|---|
| 497 | case 'e':
|
|---|
| 498 | fd = 2;
|
|---|
| 499 | psz++;
|
|---|
| 500 | break;
|
|---|
| 501 |
|
|---|
| 502 | case '0':
|
|---|
| 503 | if (!psz[1])
|
|---|
| 504 | {
|
|---|
| 505 | fd = 0;
|
|---|
| 506 | psz++;
|
|---|
| 507 | break;
|
|---|
| 508 | }
|
|---|
| 509 | case '1':
|
|---|
| 510 | case '2':
|
|---|
| 511 | case '3':
|
|---|
| 512 | case '4':
|
|---|
| 513 | case '5':
|
|---|
| 514 | case '6':
|
|---|
| 515 | case '7':
|
|---|
| 516 | case '8':
|
|---|
| 517 | case '9':
|
|---|
| 518 | fd = (int)strtol(psz, &psz, 0);
|
|---|
| 519 | if (!fd)
|
|---|
| 520 | {
|
|---|
| 521 | fprintf(pStdErr, "%s: error: failed to convert '%s' to a number\n", name(argv[0]), argv[i]);
|
|---|
| 522 | return 1;
|
|---|
| 523 |
|
|---|
| 524 | }
|
|---|
| 525 | if (fd < 0)
|
|---|
| 526 | {
|
|---|
| 527 | fprintf(pStdErr, "%s: error: negative fd %d (%s)\n", name(argv[0]), fd, argv[i]);
|
|---|
| 528 | return 1;
|
|---|
| 529 | }
|
|---|
| 530 | break;
|
|---|
| 531 |
|
|---|
| 532 | /*
|
|---|
| 533 | * Invalid argument.
|
|---|
| 534 | */
|
|---|
| 535 | default:
|
|---|
| 536 | fprintf(pStdErr, "%s: error: failed to convert '%s' ('%s') to a file descriptor\n", name(argv[0]), psz, argv[i]);
|
|---|
| 537 | return 1;
|
|---|
| 538 | }
|
|---|
| 539 |
|
|---|
| 540 | /*
|
|---|
| 541 | * Check for the filename.
|
|---|
| 542 | */
|
|---|
| 543 | if (*psz)
|
|---|
| 544 | {
|
|---|
| 545 | if (*psz != ':' && *psz != '=')
|
|---|
| 546 | {
|
|---|
| 547 | fprintf(pStdErr, "%s: syntax error: characters following the file descriptor: '%s' ('%s')\n", name(argv[0]), psz, argv[i]);
|
|---|
| 548 | return 1;
|
|---|
| 549 | }
|
|---|
| 550 | psz++;
|
|---|
| 551 | }
|
|---|
| 552 | else
|
|---|
| 553 | {
|
|---|
| 554 | i++;
|
|---|
| 555 | if (i >= argc)
|
|---|
| 556 | {
|
|---|
| 557 | fprintf(pStdErr, "%s: syntax error: missing filename argument.\n", name(argv[0]));
|
|---|
| 558 | return 1;
|
|---|
| 559 | }
|
|---|
| 560 | psz = argv[i];
|
|---|
| 561 | }
|
|---|
| 562 |
|
|---|
| 563 | /*
|
|---|
| 564 | * Setup the redirection.
|
|---|
| 565 | */
|
|---|
| 566 | if (fd == fileno(pStdErr))
|
|---|
| 567 | {
|
|---|
| 568 | /*
|
|---|
| 569 | * Move stderr to a new location, making it close on exec.
|
|---|
| 570 | * If pStdOut has already teamed up with pStdErr, update it too.
|
|---|
| 571 | */
|
|---|
| 572 | FILE *pNew;
|
|---|
| 573 | fdOpened = dup(fileno(pStdErr));
|
|---|
| 574 | if (fdOpened == -1)
|
|---|
| 575 | {
|
|---|
| 576 | fprintf(pStdErr, "%s: error: failed to dup stderr (%d): %s\n", name(argv[0]), fileno(pStdErr), strerror(errno));
|
|---|
| 577 | return 1;
|
|---|
| 578 | }
|
|---|
| 579 | #ifdef _MSC_VER
|
|---|
| 580 | /** @todo figure out how to make the handle close-on-exec. We'll simply close it for now.
|
|---|
| 581 | * SetHandleInformation + set FNOINHERIT in CRT.
|
|---|
| 582 | */
|
|---|
| 583 | #else
|
|---|
| 584 | if (fcntl(fdOpened, F_SETFD, FD_CLOEXEC) == -1)
|
|---|
| 585 | {
|
|---|
| 586 | fprintf(pStdErr, "%s: error: failed to make stderr (%d) close-on-exec: %s\n", name(argv[0]), fdOpened, strerror(errno));
|
|---|
| 587 | return 1;
|
|---|
| 588 | }
|
|---|
| 589 | #endif
|
|---|
| 590 |
|
|---|
| 591 | pNew = fdopen(fdOpened, "w");
|
|---|
| 592 | if (!pNew)
|
|---|
| 593 | {
|
|---|
| 594 | fprintf(pStdErr, "%s: error: failed to fdopen the new stderr (%d): %s\n", name(argv[0]), fdOpened, strerror(errno));
|
|---|
| 595 | return 1;
|
|---|
| 596 | }
|
|---|
| 597 | if (pStdOut == pStdErr)
|
|---|
| 598 | pStdOut = pNew;
|
|---|
| 599 | pStdErr = pNew;
|
|---|
| 600 | }
|
|---|
| 601 | else if (fd == 1 && pStdOut != pStdErr)
|
|---|
| 602 | pStdOut = pStdErr;
|
|---|
| 603 |
|
|---|
| 604 | /*
|
|---|
| 605 | * Close and open the new file descriptor.
|
|---|
| 606 | */
|
|---|
| 607 | safeCloseFd(fd);
|
|---|
| 608 | #if defined(_MSC_VER)
|
|---|
| 609 | if (!strcmp(psz, "/dev/null"))
|
|---|
| 610 | psz = (char *)"nul";
|
|---|
| 611 | #endif
|
|---|
| 612 | fdOpened = open(psz, fOpen, 0666);
|
|---|
| 613 | if (fdOpened == -1)
|
|---|
| 614 | {
|
|---|
| 615 | fprintf(pStdErr, "%s: error: failed to open '%s' as %d: %s\n", name(argv[0]), psz, fd, strerror(errno));
|
|---|
| 616 | return 1;
|
|---|
| 617 | }
|
|---|
| 618 | if (fdOpened != fd)
|
|---|
| 619 | {
|
|---|
| 620 | /* move it (dup2 returns 0 on MSC). */
|
|---|
| 621 | if (dup2(fdOpened, fd) == -1)
|
|---|
| 622 | {
|
|---|
| 623 | fprintf(pStdErr, "%s: error: failed to dup '%s' as %d: %s\n", name(argv[0]), psz, fd, strerror(errno));
|
|---|
| 624 | return 1;
|
|---|
| 625 | }
|
|---|
| 626 | close(fdOpened);
|
|---|
| 627 | }
|
|---|
| 628 | }
|
|---|
| 629 | else
|
|---|
| 630 | {
|
|---|
| 631 | fprintf(pStdErr, "%s: syntax error: Invalid argument '%s'.\n", name(argv[0]), argv[i]);
|
|---|
| 632 | return usage(pStdErr, name(argv[0]));
|
|---|
| 633 | }
|
|---|
| 634 | }
|
|---|
| 635 |
|
|---|
| 636 | /*
|
|---|
| 637 | * Make sure there's something to execute.
|
|---|
| 638 | */
|
|---|
| 639 | if (i >= argc)
|
|---|
| 640 | {
|
|---|
| 641 | fprintf(pStdErr, "%s: syntax error: nothing to execute!\n", name(argv[0]));
|
|---|
| 642 | return usage(pStdErr, name(argv[0]));
|
|---|
| 643 | }
|
|---|
| 644 |
|
|---|
| 645 | #if defined(_MSC_VER)
|
|---|
| 646 | if (fileno(pStdErr) != 2) /* no close-on-exec flag on windows */
|
|---|
| 647 | {
|
|---|
| 648 | fclose(pStdErr);
|
|---|
| 649 | pStdErr = NULL;
|
|---|
| 650 | }
|
|---|
| 651 |
|
|---|
| 652 | /* MSC is a PITA since it refuses to quote the arguments... */
|
|---|
| 653 | quote_argv(argc - i, &argv[i], fWatcomBrainDamage, 0 /*fFreeOrLeak*/);
|
|---|
| 654 | if (g_cVerbosity > 0)
|
|---|
| 655 | for (j = i; j < argc; j++)
|
|---|
| 656 | fprintf(pStdErr, "kmk_redirect: debug: argv[%i]=%s<eos>\n", j - i, argv[j]);
|
|---|
| 657 | rc = _spawnvp(_P_WAIT, argv[i], &argv[i]);
|
|---|
| 658 | if (rc == -1 && pStdErr)
|
|---|
| 659 | {
|
|---|
| 660 | fprintf(pStdErr, "%s: error: _spawnvp(_P_WAIT, \"%s\", ...) failed: %s\n", name(argv[0]), argv[i], strerror(errno));
|
|---|
| 661 | rc = 1;
|
|---|
| 662 | }
|
|---|
| 663 | return rc;
|
|---|
| 664 | #else
|
|---|
| 665 | if (g_cVerbosity > 0)
|
|---|
| 666 | for (j = i; j < argc; j++)
|
|---|
| 667 | fprintf(pStdErr, "kmk_redirect: debug: argv[%i]=%s<eos>\n", j - i, argv[j]);
|
|---|
| 668 | execvp(argv[i], &argv[i]);
|
|---|
| 669 | fprintf(pStdErr, "%s: error: _execvp(_P_WAIT, \"%s\", ...) failed: %s\n", name(argv[0]), argv[i], strerror(errno));
|
|---|
| 670 | return 1;
|
|---|
| 671 | #endif
|
|---|
| 672 | }
|
|---|
| 673 |
|
|---|