| [1765] | 1 | /*
|
|---|
| 2 | Copyright (c) 2001-2006, Gerrit Pape
|
|---|
| 3 | All rights reserved.
|
|---|
| 4 |
|
|---|
| 5 | Redistribution and use in source and binary forms, with or without
|
|---|
| 6 | modification, are permitted provided that the following conditions are met:
|
|---|
| 7 |
|
|---|
| 8 | 1. Redistributions of source code must retain the above copyright notice,
|
|---|
| 9 | this list of conditions and the following disclaimer.
|
|---|
| 10 | 2. Redistributions in binary form must reproduce the above copyright
|
|---|
| 11 | notice, this list of conditions and the following disclaimer in the
|
|---|
| 12 | documentation and/or other materials provided with the distribution.
|
|---|
| 13 | 3. The name of the author may not be used to endorse or promote products
|
|---|
| 14 | derived from this software without specific prior written permission.
|
|---|
| 15 |
|
|---|
| 16 | THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|---|
| 17 | WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|---|
| 18 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
|
|---|
| 19 | EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|---|
| 20 | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|---|
| 21 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
|
|---|
| 22 | OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|---|
| 23 | WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|---|
| 24 | OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|---|
| 25 | ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 26 | */
|
|---|
| 27 |
|
|---|
| [2725] | 28 | /* Busyboxed by Denys Vlasenko <vda.linux@googlemail.com> */
|
|---|
| [1765] | 29 | /* Dependencies on runit_lib.c removed */
|
|---|
| 30 |
|
|---|
| [3232] | 31 | //usage:#define chpst_trivial_usage
|
|---|
| 32 | //usage: "[-vP012] [-u USER[:GRP]] [-U USER[:GRP]] [-e DIR]\n"
|
|---|
| 33 | //usage: " [-/ DIR] [-n NICE] [-m BYTES] [-d BYTES] [-o N]\n"
|
|---|
| 34 | //usage: " [-p N] [-f BYTES] [-c BYTES] PROG ARGS"
|
|---|
| 35 | //usage:#define chpst_full_usage "\n\n"
|
|---|
| 36 | //usage: "Change the process state, run PROG\n"
|
|---|
| 37 | //usage: "\n -u USER[:GRP] Set uid and gid"
|
|---|
| 38 | //usage: "\n -U USER[:GRP] Set $UID and $GID in environment"
|
|---|
| 39 | //usage: "\n -e DIR Set environment variables as specified by files"
|
|---|
| 40 | //usage: "\n in DIR: file=1st_line_of_file"
|
|---|
| 41 | //usage: "\n -/ DIR Chroot to DIR"
|
|---|
| 42 | //usage: "\n -n NICE Add NICE to nice value"
|
|---|
| 43 | //usage: "\n -m BYTES Same as -d BYTES -s BYTES -l BYTES"
|
|---|
| 44 | //usage: "\n -d BYTES Limit data segment"
|
|---|
| 45 | //usage: "\n -o N Limit number of open files per process"
|
|---|
| 46 | //usage: "\n -p N Limit number of processes per uid"
|
|---|
| 47 | //usage: "\n -f BYTES Limit output file sizes"
|
|---|
| 48 | //usage: "\n -c BYTES Limit core file size"
|
|---|
| 49 | //usage: "\n -v Verbose"
|
|---|
| 50 | //usage: "\n -P Create new process group"
|
|---|
| 51 | //usage: "\n -0 Close stdin"
|
|---|
| 52 | //usage: "\n -1 Close stdout"
|
|---|
| 53 | //usage: "\n -2 Close stderr"
|
|---|
| 54 | //usage:
|
|---|
| 55 | //usage:#define envdir_trivial_usage
|
|---|
| 56 | //usage: "DIR PROG ARGS"
|
|---|
| 57 | //usage:#define envdir_full_usage "\n\n"
|
|---|
| 58 | //usage: "Set various environment variables as specified by files\n"
|
|---|
| 59 | //usage: "in the directory DIR, run PROG"
|
|---|
| 60 | //usage:
|
|---|
| 61 | //usage:#define envuidgid_trivial_usage
|
|---|
| 62 | //usage: "USER PROG ARGS"
|
|---|
| 63 | //usage:#define envuidgid_full_usage "\n\n"
|
|---|
| 64 | //usage: "Set $UID to USER's uid and $GID to USER's gid, run PROG"
|
|---|
| 65 | //usage:
|
|---|
| 66 | //usage:#define setuidgid_trivial_usage
|
|---|
| 67 | //usage: "USER PROG ARGS"
|
|---|
| 68 | //usage:#define setuidgid_full_usage "\n\n"
|
|---|
| 69 | //usage: "Set uid and gid to USER's uid and gid, drop supplementary group ids,\n"
|
|---|
| 70 | //usage: "run PROG"
|
|---|
| 71 | //usage:
|
|---|
| 72 | //usage:#define softlimit_trivial_usage
|
|---|
| 73 | //usage: "[-a BYTES] [-m BYTES] [-d BYTES] [-s BYTES] [-l BYTES]\n"
|
|---|
| 74 | //usage: " [-f BYTES] [-c BYTES] [-r BYTES] [-o N] [-p N] [-t N]\n"
|
|---|
| 75 | //usage: " PROG ARGS"
|
|---|
| 76 | //usage:#define softlimit_full_usage "\n\n"
|
|---|
| 77 | //usage: "Set soft resource limits, then run PROG\n"
|
|---|
| 78 | //usage: "\n -a BYTES Limit total size of all segments"
|
|---|
| 79 | //usage: "\n -m BYTES Same as -d BYTES -s BYTES -l BYTES -a BYTES"
|
|---|
| 80 | //usage: "\n -d BYTES Limit data segment"
|
|---|
| 81 | //usage: "\n -s BYTES Limit stack segment"
|
|---|
| 82 | //usage: "\n -l BYTES Limit locked memory size"
|
|---|
| 83 | //usage: "\n -o N Limit number of open files per process"
|
|---|
| 84 | //usage: "\n -p N Limit number of processes per uid"
|
|---|
| 85 | //usage: "\nOptions controlling file sizes:"
|
|---|
| 86 | //usage: "\n -f BYTES Limit output file sizes"
|
|---|
| 87 | //usage: "\n -c BYTES Limit core file size"
|
|---|
| 88 | //usage: "\nEfficiency opts:"
|
|---|
| 89 | //usage: "\n -r BYTES Limit resident set size"
|
|---|
| 90 | //usage: "\n -t N Limit CPU time, process receives"
|
|---|
| 91 | //usage: "\n a SIGXCPU after N seconds"
|
|---|
| 92 |
|
|---|
| [1765] | 93 | #include "libbb.h"
|
|---|
| [3232] | 94 | #include <sys/resource.h> /* getrlimit */
|
|---|
| [1765] | 95 |
|
|---|
| [2725] | 96 | /*
|
|---|
| 97 | Five applets here: chpst, envdir, envuidgid, setuidgid, softlimit.
|
|---|
| [1765] | 98 |
|
|---|
| [2725] | 99 | Only softlimit and chpst are taking options:
|
|---|
| [1765] | 100 |
|
|---|
| [2725] | 101 | # common
|
|---|
| 102 | -o N Limit number of open files per process
|
|---|
| 103 | -p N Limit number of processes per uid
|
|---|
| 104 | -m BYTES Same as -d BYTES -s BYTES -l BYTES [-a BYTES]
|
|---|
| 105 | -d BYTES Limit data segment
|
|---|
| 106 | -f BYTES Limit output file sizes
|
|---|
| 107 | -c BYTES Limit core file size
|
|---|
| 108 | # softlimit
|
|---|
| 109 | -a BYTES Limit total size of all segments
|
|---|
| 110 | -s BYTES Limit stack segment
|
|---|
| 111 | -l BYTES Limit locked memory size
|
|---|
| 112 | -r BYTES Limit resident set size
|
|---|
| 113 | -t N Limit CPU time
|
|---|
| 114 | # chpst
|
|---|
| 115 | -u USER[:GRP] Set uid and gid
|
|---|
| 116 | -U USER[:GRP] Set $UID and $GID in environment
|
|---|
| 117 | -e DIR Set environment variables as specified by files in DIR
|
|---|
| 118 | -/ DIR Chroot to DIR
|
|---|
| 119 | -n NICE Add NICE to nice value
|
|---|
| 120 | -v Verbose
|
|---|
| 121 | -P Create new process group
|
|---|
| 122 | -0 -1 -2 Close fd 0,1,2
|
|---|
| [1765] | 123 |
|
|---|
| [2725] | 124 | Even though we accept all these options for both softlimit and chpst,
|
|---|
| 125 | they are not to be advertised on their help texts.
|
|---|
| 126 | We have enough problems with feature creep in other people's
|
|---|
| 127 | software, don't want to add our own.
|
|---|
| [1765] | 128 |
|
|---|
| [2725] | 129 | envdir, envuidgid, setuidgid take no options, but they reuse code which
|
|---|
| 130 | handles -e, -U and -u.
|
|---|
| 131 | */
|
|---|
| [1765] | 132 |
|
|---|
| [2725] | 133 | enum {
|
|---|
| 134 | OPT_a = (1 << 0) * ENABLE_SOFTLIMIT,
|
|---|
| 135 | OPT_c = (1 << 1) * (ENABLE_SOFTLIMIT || ENABLE_CHPST),
|
|---|
| 136 | OPT_d = (1 << 2) * (ENABLE_SOFTLIMIT || ENABLE_CHPST),
|
|---|
| 137 | OPT_f = (1 << 3) * (ENABLE_SOFTLIMIT || ENABLE_CHPST),
|
|---|
| 138 | OPT_l = (1 << 4) * ENABLE_SOFTLIMIT,
|
|---|
| 139 | OPT_m = (1 << 5) * (ENABLE_SOFTLIMIT || ENABLE_CHPST),
|
|---|
| 140 | OPT_o = (1 << 6) * (ENABLE_SOFTLIMIT || ENABLE_CHPST),
|
|---|
| 141 | OPT_p = (1 << 7) * (ENABLE_SOFTLIMIT || ENABLE_CHPST),
|
|---|
| 142 | OPT_r = (1 << 8) * ENABLE_SOFTLIMIT,
|
|---|
| 143 | OPT_s = (1 << 9) * ENABLE_SOFTLIMIT,
|
|---|
| 144 | OPT_t = (1 << 10) * ENABLE_SOFTLIMIT,
|
|---|
| 145 | OPT_u = (1 << 11) * (ENABLE_CHPST || ENABLE_SETUIDGID),
|
|---|
| 146 | OPT_U = (1 << 12) * (ENABLE_CHPST || ENABLE_ENVUIDGID),
|
|---|
| 147 | OPT_e = (1 << 13) * (ENABLE_CHPST || ENABLE_ENVDIR),
|
|---|
| 148 | OPT_root = (1 << 14) * ENABLE_CHPST,
|
|---|
| 149 | OPT_n = (1 << 15) * ENABLE_CHPST,
|
|---|
| 150 | OPT_v = (1 << 16) * ENABLE_CHPST,
|
|---|
| 151 | OPT_P = (1 << 17) * ENABLE_CHPST,
|
|---|
| 152 | OPT_0 = (1 << 18) * ENABLE_CHPST,
|
|---|
| 153 | OPT_1 = (1 << 19) * ENABLE_CHPST,
|
|---|
| 154 | OPT_2 = (1 << 20) * ENABLE_CHPST,
|
|---|
| 155 | };
|
|---|
| [1765] | 156 |
|
|---|
| [2725] | 157 | /* TODO: use recursive_action? */
|
|---|
| 158 | static NOINLINE void edir(const char *directory_name)
|
|---|
| [1765] | 159 | {
|
|---|
| 160 | int wdir;
|
|---|
| 161 | DIR *dir;
|
|---|
| 162 | struct dirent *d;
|
|---|
| 163 | int fd;
|
|---|
| 164 |
|
|---|
| 165 | wdir = xopen(".", O_RDONLY | O_NDELAY);
|
|---|
| 166 | xchdir(directory_name);
|
|---|
| [2725] | 167 | dir = xopendir(".");
|
|---|
| [1765] | 168 | for (;;) {
|
|---|
| [2725] | 169 | char buf[256];
|
|---|
| 170 | char *tail;
|
|---|
| 171 | int size;
|
|---|
| 172 |
|
|---|
| [1765] | 173 | errno = 0;
|
|---|
| 174 | d = readdir(dir);
|
|---|
| 175 | if (!d) {
|
|---|
| 176 | if (errno)
|
|---|
| 177 | bb_perror_msg_and_die("readdir %s",
|
|---|
| 178 | directory_name);
|
|---|
| 179 | break;
|
|---|
| 180 | }
|
|---|
| [2725] | 181 | if (d->d_name[0] == '.')
|
|---|
| 182 | continue;
|
|---|
| [1765] | 183 | fd = open(d->d_name, O_RDONLY | O_NDELAY);
|
|---|
| 184 | if (fd < 0) {
|
|---|
| [2725] | 185 | if ((errno == EISDIR) && directory_name) {
|
|---|
| 186 | if (option_mask32 & OPT_v)
|
|---|
| [1765] | 187 | bb_perror_msg("warning: %s/%s is a directory",
|
|---|
| 188 | directory_name, d->d_name);
|
|---|
| 189 | continue;
|
|---|
| 190 | }
|
|---|
| [2725] | 191 | bb_perror_msg_and_die("open %s/%s",
|
|---|
| 192 | directory_name, d->d_name);
|
|---|
| [1765] | 193 | }
|
|---|
| [2725] | 194 | size = full_read(fd, buf, sizeof(buf)-1);
|
|---|
| 195 | close(fd);
|
|---|
| 196 | if (size < 0)
|
|---|
| 197 | bb_perror_msg_and_die("read %s/%s",
|
|---|
| 198 | directory_name, d->d_name);
|
|---|
| 199 | if (size == 0) {
|
|---|
| 200 | unsetenv(d->d_name);
|
|---|
| 201 | continue;
|
|---|
| 202 | }
|
|---|
| 203 | buf[size] = '\n';
|
|---|
| 204 | tail = strchr(buf, '\n');
|
|---|
| 205 | /* skip trailing whitespace */
|
|---|
| 206 | while (1) {
|
|---|
| 207 | *tail = '\0';
|
|---|
| 208 | tail--;
|
|---|
| 209 | if (tail < buf || !isspace(*tail))
|
|---|
| 210 | break;
|
|---|
| 211 | }
|
|---|
| 212 | xsetenv(d->d_name, buf);
|
|---|
| [1765] | 213 | }
|
|---|
| 214 | closedir(dir);
|
|---|
| [2725] | 215 | if (fchdir(wdir) == -1)
|
|---|
| 216 | bb_perror_msg_and_die("fchdir");
|
|---|
| [1765] | 217 | close(wdir);
|
|---|
| 218 | }
|
|---|
| 219 |
|
|---|
| 220 | static void limit(int what, long l)
|
|---|
| 221 | {
|
|---|
| 222 | struct rlimit r;
|
|---|
| 223 |
|
|---|
| [2725] | 224 | /* Never fails under Linux (except if you pass it bad arguments) */
|
|---|
| 225 | getrlimit(what, &r);
|
|---|
| [1765] | 226 | if ((l < 0) || (l > r.rlim_max))
|
|---|
| 227 | r.rlim_cur = r.rlim_max;
|
|---|
| 228 | else
|
|---|
| 229 | r.rlim_cur = l;
|
|---|
| [2725] | 230 | if (setrlimit(what, &r) == -1)
|
|---|
| 231 | bb_perror_msg_and_die("setrlimit");
|
|---|
| [1765] | 232 | }
|
|---|
| 233 |
|
|---|
| [2725] | 234 | int chpst_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|---|
| 235 | int chpst_main(int argc UNUSED_PARAM, char **argv)
|
|---|
| [1765] | 236 | {
|
|---|
| [2725] | 237 | struct bb_uidgid_t ugid;
|
|---|
| 238 | char *set_user = set_user; /* for compiler */
|
|---|
| 239 | char *env_user = env_user;
|
|---|
| 240 | char *env_dir = env_dir;
|
|---|
| 241 | char *root;
|
|---|
| 242 | char *nicestr;
|
|---|
| 243 | unsigned limita;
|
|---|
| 244 | unsigned limitc;
|
|---|
| 245 | unsigned limitd;
|
|---|
| 246 | unsigned limitf;
|
|---|
| 247 | unsigned limitl;
|
|---|
| 248 | unsigned limitm;
|
|---|
| 249 | unsigned limito;
|
|---|
| 250 | unsigned limitp;
|
|---|
| 251 | unsigned limitr;
|
|---|
| 252 | unsigned limits;
|
|---|
| 253 | unsigned limitt;
|
|---|
| 254 | unsigned opt;
|
|---|
| 255 |
|
|---|
| 256 | if ((ENABLE_CHPST && applet_name[0] == 'c')
|
|---|
| 257 | || (ENABLE_SOFTLIMIT && applet_name[1] == 'o')
|
|---|
| 258 | ) {
|
|---|
| 259 | // FIXME: can we live with int-sized limits?
|
|---|
| 260 | // can we live with 40000 days?
|
|---|
| 261 | // if yes -> getopt converts strings to numbers for us
|
|---|
| 262 | opt_complementary = "-1:a+:c+:d+:f+:l+:m+:o+:p+:r+:s+:t+";
|
|---|
| 263 | opt = getopt32(argv, "+a:c:d:f:l:m:o:p:r:s:t:u:U:e:"
|
|---|
| 264 | IF_CHPST("/:n:vP012"),
|
|---|
| 265 | &limita, &limitc, &limitd, &limitf, &limitl,
|
|---|
| 266 | &limitm, &limito, &limitp, &limitr, &limits, &limitt,
|
|---|
| 267 | &set_user, &env_user, &env_dir
|
|---|
| 268 | IF_CHPST(, &root, &nicestr));
|
|---|
| 269 | argv += optind;
|
|---|
| 270 | if (opt & OPT_m) { // -m means -asld
|
|---|
| 271 | limita = limits = limitl = limitd = limitm;
|
|---|
| 272 | opt |= (OPT_s | OPT_l | OPT_a | OPT_d);
|
|---|
| 273 | }
|
|---|
| 274 | } else {
|
|---|
| 275 | option_mask32 = opt = 0;
|
|---|
| 276 | argv++;
|
|---|
| 277 | if (!*argv)
|
|---|
| 278 | bb_show_usage();
|
|---|
| 279 | }
|
|---|
| 280 |
|
|---|
| 281 | // envdir?
|
|---|
| 282 | if (ENABLE_ENVDIR && applet_name[3] == 'd') {
|
|---|
| 283 | env_dir = *argv++;
|
|---|
| 284 | opt |= OPT_e;
|
|---|
| 285 | }
|
|---|
| 286 |
|
|---|
| 287 | // setuidgid?
|
|---|
| 288 | if (ENABLE_SETUIDGID && applet_name[1] == 'e') {
|
|---|
| 289 | set_user = *argv++;
|
|---|
| 290 | opt |= OPT_u;
|
|---|
| 291 | }
|
|---|
| 292 |
|
|---|
| 293 | // envuidgid?
|
|---|
| 294 | if (ENABLE_ENVUIDGID && applet_name[0] == 'e' && applet_name[3] == 'u') {
|
|---|
| 295 | env_user = *argv++;
|
|---|
| 296 | opt |= OPT_U;
|
|---|
| 297 | }
|
|---|
| 298 |
|
|---|
| 299 | // we must have PROG [ARGS]
|
|---|
| 300 | if (!*argv)
|
|---|
| 301 | bb_show_usage();
|
|---|
| 302 |
|
|---|
| 303 | // set limits
|
|---|
| 304 | if (opt & OPT_d) {
|
|---|
| [1765] | 305 | #ifdef RLIMIT_DATA
|
|---|
| 306 | limit(RLIMIT_DATA, limitd);
|
|---|
| 307 | #else
|
|---|
| [2725] | 308 | if (opt & OPT_v)
|
|---|
| 309 | bb_error_msg("system does not support RLIMIT_%s",
|
|---|
| 310 | "DATA");
|
|---|
| [1765] | 311 | #endif
|
|---|
| 312 | }
|
|---|
| [2725] | 313 | if (opt & OPT_s) {
|
|---|
| [1765] | 314 | #ifdef RLIMIT_STACK
|
|---|
| 315 | limit(RLIMIT_STACK, limits);
|
|---|
| 316 | #else
|
|---|
| [2725] | 317 | if (opt & OPT_v)
|
|---|
| 318 | bb_error_msg("system does not support RLIMIT_%s",
|
|---|
| 319 | "STACK");
|
|---|
| [1765] | 320 | #endif
|
|---|
| 321 | }
|
|---|
| [2725] | 322 | if (opt & OPT_l) {
|
|---|
| [1765] | 323 | #ifdef RLIMIT_MEMLOCK
|
|---|
| 324 | limit(RLIMIT_MEMLOCK, limitl);
|
|---|
| 325 | #else
|
|---|
| [2725] | 326 | if (opt & OPT_v)
|
|---|
| 327 | bb_error_msg("system does not support RLIMIT_%s",
|
|---|
| 328 | "MEMLOCK");
|
|---|
| [1765] | 329 | #endif
|
|---|
| 330 | }
|
|---|
| [2725] | 331 | if (opt & OPT_a) {
|
|---|
| [1765] | 332 | #ifdef RLIMIT_VMEM
|
|---|
| 333 | limit(RLIMIT_VMEM, limita);
|
|---|
| 334 | #else
|
|---|
| 335 | #ifdef RLIMIT_AS
|
|---|
| 336 | limit(RLIMIT_AS, limita);
|
|---|
| 337 | #else
|
|---|
| [2725] | 338 | if (opt & OPT_v)
|
|---|
| 339 | bb_error_msg("system does not support RLIMIT_%s",
|
|---|
| 340 | "VMEM");
|
|---|
| [1765] | 341 | #endif
|
|---|
| 342 | #endif
|
|---|
| 343 | }
|
|---|
| [2725] | 344 | if (opt & OPT_o) {
|
|---|
| [1765] | 345 | #ifdef RLIMIT_NOFILE
|
|---|
| 346 | limit(RLIMIT_NOFILE, limito);
|
|---|
| 347 | #else
|
|---|
| 348 | #ifdef RLIMIT_OFILE
|
|---|
| 349 | limit(RLIMIT_OFILE, limito);
|
|---|
| 350 | #else
|
|---|
| [2725] | 351 | if (opt & OPT_v)
|
|---|
| 352 | bb_error_msg("system does not support RLIMIT_%s",
|
|---|
| 353 | "NOFILE");
|
|---|
| [1765] | 354 | #endif
|
|---|
| 355 | #endif
|
|---|
| 356 | }
|
|---|
| [2725] | 357 | if (opt & OPT_p) {
|
|---|
| [1765] | 358 | #ifdef RLIMIT_NPROC
|
|---|
| 359 | limit(RLIMIT_NPROC, limitp);
|
|---|
| 360 | #else
|
|---|
| [2725] | 361 | if (opt & OPT_v)
|
|---|
| 362 | bb_error_msg("system does not support RLIMIT_%s",
|
|---|
| 363 | "NPROC");
|
|---|
| [1765] | 364 | #endif
|
|---|
| 365 | }
|
|---|
| [2725] | 366 | if (opt & OPT_f) {
|
|---|
| [1765] | 367 | #ifdef RLIMIT_FSIZE
|
|---|
| 368 | limit(RLIMIT_FSIZE, limitf);
|
|---|
| 369 | #else
|
|---|
| [2725] | 370 | if (opt & OPT_v)
|
|---|
| 371 | bb_error_msg("system does not support RLIMIT_%s",
|
|---|
| 372 | "FSIZE");
|
|---|
| [1765] | 373 | #endif
|
|---|
| 374 | }
|
|---|
| [2725] | 375 | if (opt & OPT_c) {
|
|---|
| [1765] | 376 | #ifdef RLIMIT_CORE
|
|---|
| 377 | limit(RLIMIT_CORE, limitc);
|
|---|
| 378 | #else
|
|---|
| [2725] | 379 | if (opt & OPT_v)
|
|---|
| 380 | bb_error_msg("system does not support RLIMIT_%s",
|
|---|
| 381 | "CORE");
|
|---|
| [1765] | 382 | #endif
|
|---|
| 383 | }
|
|---|
| [2725] | 384 | if (opt & OPT_r) {
|
|---|
| [1765] | 385 | #ifdef RLIMIT_RSS
|
|---|
| 386 | limit(RLIMIT_RSS, limitr);
|
|---|
| 387 | #else
|
|---|
| [2725] | 388 | if (opt & OPT_v)
|
|---|
| 389 | bb_error_msg("system does not support RLIMIT_%s",
|
|---|
| 390 | "RSS");
|
|---|
| [1765] | 391 | #endif
|
|---|
| 392 | }
|
|---|
| [2725] | 393 | if (opt & OPT_t) {
|
|---|
| [1765] | 394 | #ifdef RLIMIT_CPU
|
|---|
| 395 | limit(RLIMIT_CPU, limitt);
|
|---|
| 396 | #else
|
|---|
| [2725] | 397 | if (opt & OPT_v)
|
|---|
| 398 | bb_error_msg("system does not support RLIMIT_%s",
|
|---|
| 399 | "CPU");
|
|---|
| [1765] | 400 | #endif
|
|---|
| 401 | }
|
|---|
| 402 |
|
|---|
| [2725] | 403 | if (opt & OPT_P)
|
|---|
| 404 | setsid();
|
|---|
| [1765] | 405 |
|
|---|
| [2725] | 406 | if (opt & OPT_e)
|
|---|
| 407 | edir(env_dir);
|
|---|
| [1765] | 408 |
|
|---|
| [3232] | 409 | if (opt & (OPT_u|OPT_U))
|
|---|
| 410 | xget_uidgid(&ugid, set_user);
|
|---|
| 411 |
|
|---|
| 412 | // chrooted jail must have /etc/passwd if we move this after chroot.
|
|---|
| 413 | // OTOH chroot fails for non-roots.
|
|---|
| 414 | // Solution: cache uid/gid before chroot, apply uid/gid after.
|
|---|
| [2725] | 415 | if (opt & OPT_U) {
|
|---|
| 416 | xsetenv("GID", utoa(ugid.gid));
|
|---|
| 417 | xsetenv("UID", utoa(ugid.uid));
|
|---|
| [1765] | 418 | }
|
|---|
| 419 |
|
|---|
| [2725] | 420 | if (opt & OPT_root) {
|
|---|
| [3232] | 421 | xchroot(root);
|
|---|
| [1765] | 422 | }
|
|---|
| [2725] | 423 |
|
|---|
| 424 | if (opt & OPT_u) {
|
|---|
| 425 | if (setgroups(1, &ugid.gid) == -1)
|
|---|
| 426 | bb_perror_msg_and_die("setgroups");
|
|---|
| 427 | xsetgid(ugid.gid);
|
|---|
| 428 | xsetuid(ugid.uid);
|
|---|
| 429 | }
|
|---|
| 430 |
|
|---|
| 431 | if (opt & OPT_n) {
|
|---|
| [1765] | 432 | errno = 0;
|
|---|
| [2725] | 433 | if (nice(xatoi(nicestr)) == -1)
|
|---|
| [1765] | 434 | bb_perror_msg_and_die("nice");
|
|---|
| 435 | }
|
|---|
| 436 |
|
|---|
| [2725] | 437 | if (opt & OPT_0)
|
|---|
| 438 | close(STDIN_FILENO);
|
|---|
| 439 | if (opt & OPT_1)
|
|---|
| 440 | close(STDOUT_FILENO);
|
|---|
| 441 | if (opt & OPT_2)
|
|---|
| 442 | close(STDERR_FILENO);
|
|---|
| [1765] | 443 |
|
|---|
| [2725] | 444 | BB_EXECVP_or_die(argv);
|
|---|
| [1765] | 445 | }
|
|---|
