src/test/test-fileio.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <fcntl.h>
   4 #include <limits.h>
   5 #include <stdio.h>
   6 #include <unistd.h>
   7
   8 #include "alloc-util.h"
   9 #include "ctype.h"
  10 #include "env-file.h"
  11 #include "env-util.h"
  12 #include "errno-util.h"
  13 #include "fd-util.h"
  14 #include "fileio.h"
  15 #include "fs-util.h"
  16 #include "io-util.h"
  17 #include "memfd-util.h"
  18 #include "parse-util.h"
  19 #include "path-util.h"
  20 #include "process-util.h"
  21 #include "random-util.h"
  22 #include "rm-rf.h"
  23 #include "socket-util.h"
  24 #include "string-util.h"
  25 #include "strv.h"
  26 #include "tests.h"
  27 #include "tmpfile-util.h"
  28
  29 TEST(parse_env_file) {
  30         _cleanup_(unlink_tempfilep) char
  31                 t[] = "/tmp/test-fileio-in-XXXXXX",
  32                 p[] = "/tmp/test-fileio-out-XXXXXX";
  33         FILE *f;
  34         _cleanup_free_ char *one = NULL, *two = NULL, *three = NULL, *four = NULL, *five = NULL,
  35                         *six = NULL, *seven = NULL, *eight = NULL, *nine = NULL, *ten = NULL,
  36                         *eleven = NULL, *twelve = NULL, *thirteen = NULL;
  37         _cleanup_strv_free_ char **a = NULL, **b = NULL;
  38         unsigned k;
  39         int r;
  40
  41         assert_se(fmkostemp_safe(t, "w", &f) == 0);
  42         fputs("one=BAR   \n"
  43               "# comment\n"
  44               " # comment \n"
  45               " ; comment \n"
  46               "  two   =   bar    \n"
  47               "invalid line\n"
  48               "invalid line #comment\n"
  49               "three = \"333\n"
  50               "xxxx\"\n"
  51               "four = \'44\\\"44\'\n"
  52               "five = \"55\\\"55\" \"FIVE\" cinco   \n"
  53               "six = seis sechs\\\n"
  54               " sis\n"
  55               "seven=\"sevenval\" #nocomment\n"
  56               "eight=eightval #nocomment\n"
  57               "export nine=nineval\n"
  58               "ten=ignored\n"
  59               "ten=ignored\n"
  60               "ten=\n"
  61               "eleven=\\value\n"
  62               "twelve=\"\\value\"\n"
  63               "thirteen='\\value'", f);
  64
  65         fflush(f);
  66         fclose(f);
  67
  68         r = load_env_file(NULL, t, &a);
  69         assert_se(r >= 0);
  70
  71         STRV_FOREACH(i, a)
  72                 log_info("Got: <%s>", *i);
  73
  74         assert_se(streq_ptr(a[0], "one=BAR"));
  75         assert_se(streq_ptr(a[1], "two=bar"));
  76         assert_se(streq_ptr(a[2], "three=333\nxxxx"));
  77         assert_se(streq_ptr(a[3], "four=44\\\"44"));
  78         assert_se(streq_ptr(a[4], "five=55\"55FIVEcinco"));
  79         assert_se(streq_ptr(a[5], "six=seis sechs sis"));
  80         assert_se(streq_ptr(a[6], "seven=sevenval#nocomment"));
  81         assert_se(streq_ptr(a[7], "eight=eightval #nocomment"));
  82         assert_se(streq_ptr(a[8], "export nine=nineval"));
  83         assert_se(streq_ptr(a[9], "ten="));
  84         assert_se(streq_ptr(a[10], "eleven=value"));
  85         assert_se(streq_ptr(a[11], "twelve=\\value"));
  86         assert_se(streq_ptr(a[12], "thirteen=\\value"));
  87         assert_se(a[13] == NULL);
  88
  89         strv_env_clean(a);
  90
  91         k = 0;
  92         STRV_FOREACH(i, b) {
  93                 log_info("Got2: <%s>", *i);
  94                 assert_se(streq(*i, a[k++]));
  95         }
  96
  97         r = parse_env_file(
  98                         NULL, t,
  99                        "one", &one,
 100                        "two", &two,
 101                        "three", &three,
 102                        "four", &four,
 103                        "five", &five,
 104                        "six", &six,
 105                        "seven", &seven,
 106                        "eight", &eight,
 107                        "export nine", &nine,
 108                        "ten", &ten,
 109                        "eleven", &eleven,
 110                        "twelve", &twelve,
 111                        "thirteen", &thirteen);
 112         assert_se(r == 0);
 113
 114         log_info("one=[%s]", strna(one));
 115         log_info("two=[%s]", strna(two));
 116         log_info("three=[%s]", strna(three));
 117         log_info("four=[%s]", strna(four));
 118         log_info("five=[%s]", strna(five));
 119         log_info("six=[%s]", strna(six));
 120         log_info("seven=[%s]", strna(seven));
 121         log_info("eight=[%s]", strna(eight));
 122         log_info("export nine=[%s]", strna(nine));
 123         log_info("ten=[%s]", strna(nine));
 124         log_info("eleven=[%s]", strna(eleven));
 125         log_info("twelve=[%s]", strna(twelve));
 126         log_info("thirteen=[%s]", strna(thirteen));
 127
 128         assert_se(streq(one, "BAR"));
 129         assert_se(streq(two, "bar"));
 130         assert_se(streq(three, "333\nxxxx"));
 131         assert_se(streq(four, "44\\\"44"));
 132         assert_se(streq(five, "55\"55FIVEcinco"));
 133         assert_se(streq(six, "seis sechs sis"));
 134         assert_se(streq(seven, "sevenval#nocomment"));
 135         assert_se(streq(eight, "eightval #nocomment"));
 136         assert_se(streq(nine, "nineval"));
 137         assert_se(ten == NULL);
 138         assert_se(streq(eleven, "value"));
 139         assert_se(streq(twelve, "\\value"));
 140         assert_se(streq(thirteen, "\\value"));
 141
 142         {
 143                 /* prepare a temporary file to write the environment to */
 144                 _cleanup_close_ int fd = mkostemp_safe(p);
 145                 assert_se(fd >= 0);
 146         }
 147
 148         r = write_env_file(p, a);
 149         assert_se(r >= 0);
 150
 151         r = load_env_file(NULL, p, &b);
 152         assert_se(r >= 0);
 153 }
 154
 155 static void test_one_shell_var(const char *file, const char *variable, const char *value) {
 156         _cleanup_free_ char *cmd = NULL, *from_shell = NULL;
 157         _cleanup_pclose_ FILE *f = NULL;
 158         size_t sz;
 159
 160         assert_se(cmd = strjoin(". ", file, " && /bin/echo -n \"$", variable, "\""));
 161         assert_se(f = popen(cmd, "re"));
 162         assert_se(read_full_stream(f, &from_shell, &sz) >= 0);
 163         assert_se(sz == strlen(value));
 164         assert_se(streq(from_shell, value));
 165 }
 166
 167 TEST(parse_multiline_env_file) {
 168         _cleanup_(unlink_tempfilep) char
 169                 t[] = "/tmp/test-fileio-in-XXXXXX",
 170                 p[] = "/tmp/test-fileio-out-XXXXXX";
 171         FILE *f;
 172         _cleanup_strv_free_ char **a = NULL, **b = NULL;
 173         int r;
 174
 175         assert_se(fmkostemp_safe(t, "w", &f) == 0);
 176         fputs("one=BAR\\\n"
 177               "\\ \\ \\ \\ VAR\\\n"
 178               "\\\tGAR\n"
 179               "#comment\n"
 180               "two=\"bar\\\n"
 181               "    var\\\n"
 182               "\tgar\"\n"
 183               "#comment\n"
 184               "tri=\"bar \\\n"
 185               "    var \\\n"
 186               "\tgar \"\n", f);
 187
 188         assert_se(fflush_and_check(f) >= 0);
 189         fclose(f);
 190
 191         test_one_shell_var(t, "one", "BAR    VAR\tGAR");
 192         test_one_shell_var(t, "two", "bar    var\tgar");
 193         test_one_shell_var(t, "tri", "bar     var \tgar ");
 194
 195         r = load_env_file(NULL, t, &a);
 196         assert_se(r >= 0);
 197
 198         STRV_FOREACH(i, a)
 199                 log_info("Got: <%s>", *i);
 200
 201         assert_se(streq_ptr(a[0], "one=BAR    VAR\tGAR"));
 202         assert_se(streq_ptr(a[1], "two=bar    var\tgar"));
 203         assert_se(streq_ptr(a[2], "tri=bar     var \tgar "));
 204         assert_se(a[3] == NULL);
 205
 206         {
 207                 _cleanup_close_ int fd = mkostemp_safe(p);
 208                 assert_se(fd >= 0);
 209         }
 210
 211         r = write_env_file(p, a);
 212         assert_se(r >= 0);
 213
 214         r = load_env_file(NULL, p, &b);
 215         assert_se(r >= 0);
 216 }
 217
 218 TEST(merge_env_file) {
 219         _cleanup_(unlink_tempfilep) char t[] = "/tmp/test-fileio-XXXXXX";
 220         _cleanup_fclose_ FILE *f = NULL;
 221         _cleanup_strv_free_ char **a = NULL;
 222         int r;
 223
 224         assert_se(fmkostemp_safe(t, "w", &f) == 0);
 225         log_info("/* %s (%s) */", __func__, t);
 226
 227         r = write_string_stream(f,
 228                                 "one=1   \n"
 229                                 "twelve=${one}2\n"
 230                                 "twentyone=2${one}\n"
 231                                 "one=2\n"
 232                                 "twentytwo=2${one}\n"
 233                                 "xxx_minus_three=$xxx - 3\n"
 234                                 "xxx=0x$one$one$one\n"
 235                                 "yyy=${one:-fallback}\n"
 236                                 "zzz=${one:+replacement}\n"
 237                                 "zzzz=${foobar:-${nothing}}\n"
 238                                 "zzzzz=${nothing:+${nothing}}\n"
 239                                 , WRITE_STRING_FILE_AVOID_NEWLINE);
 240         assert_se(r >= 0);
 241
 242         r = merge_env_file(&a, NULL, t);
 243         assert_se(r >= 0);
 244         strv_sort(a);
 245
 246         STRV_FOREACH(i, a)
 247                 log_info("Got: <%s>", *i);
 248
 249         assert_se(streq(a[0], "one=2"));
 250         assert_se(streq(a[1], "twelve=12"));
 251         assert_se(streq(a[2], "twentyone=21"));
 252         assert_se(streq(a[3], "twentytwo=22"));
 253         assert_se(streq(a[4], "xxx=0x222"));
 254         assert_se(streq(a[5], "xxx_minus_three= - 3"));
 255         assert_se(streq(a[6], "yyy=2"));
 256         assert_se(streq(a[7], "zzz=replacement"));
 257         assert_se(streq(a[8], "zzzz="));
 258         assert_se(streq(a[9], "zzzzz="));
 259         assert_se(a[10] == NULL);
 260
 261         r = merge_env_file(&a, NULL, t);
 262         assert_se(r >= 0);
 263         strv_sort(a);
 264
 265         STRV_FOREACH(i, a)
 266                 log_info("Got2: <%s>", *i);
 267
 268         assert_se(streq(a[0], "one=2"));
 269         assert_se(streq(a[1], "twelve=12"));
 270         assert_se(streq(a[2], "twentyone=21"));
 271         assert_se(streq(a[3], "twentytwo=22"));
 272         assert_se(streq(a[4], "xxx=0x222"));
 273         assert_se(streq(a[5], "xxx_minus_three=0x222 - 3"));
 274         assert_se(streq(a[6], "yyy=2"));
 275         assert_se(streq(a[7], "zzz=replacement"));
 276         assert_se(streq(a[8], "zzzz="));
 277         assert_se(streq(a[9], "zzzzz="));
 278         assert_se(a[10] == NULL);
 279 }
 280
 281 TEST(merge_env_file_invalid) {
 282         _cleanup_(unlink_tempfilep) char t[] = "/tmp/test-fileio-XXXXXX";
 283         _cleanup_fclose_ FILE *f = NULL;
 284         _cleanup_strv_free_ char **a = NULL;
 285         int r;
 286
 287         assert_se(fmkostemp_safe(t, "w", &f) == 0);
 288         log_info("/* %s (%s) */", __func__, t);
 289
 290         r = write_string_stream(f,
 291                                 "unset one   \n"
 292                                 "unset one=   \n"
 293                                 "unset one=1   \n"
 294                                 "one   \n"
 295                                 "one =  \n"
 296                                 "one two =\n"
 297                                 "\x20two=\n"
 298                                 "#comment=comment\n"
 299                                 ";comment2=comment2\n"
 300                                 "#\n"
 301                                 "\n\n"                  /* empty line */
 302                                 , WRITE_STRING_FILE_AVOID_NEWLINE);
 303         assert_se(r >= 0);
 304
 305         r = merge_env_file(&a, NULL, t);
 306         assert_se(r >= 0);
 307
 308         STRV_FOREACH(i, a)
 309                 log_info("Got: <%s>", *i);
 310
 311         assert_se(strv_isempty(a));
 312 }
 313
 314 TEST(executable_is_script) {
 315         _cleanup_(unlink_tempfilep) char t[] = "/tmp/test-fileio-XXXXXX";
 316         _cleanup_fclose_ FILE *f = NULL;
 317         char *command;
 318         int r;
 319
 320         assert_se(fmkostemp_safe(t, "w", &f) == 0);
 321         fputs("#! /bin/script -a -b \ngoo goo", f);
 322         fflush(f);
 323
 324         r = executable_is_script(t, &command);
 325         assert_se(r > 0);
 326         assert_se(streq(command, "/bin/script"));
 327         free(command);
 328
 329         r = executable_is_script("/bin/sh", &command);
 330         assert_se(r == 0);
 331
 332         r = executable_is_script("/usr/bin/yum", &command);
 333         assert_se(r > 0 || r == -ENOENT);
 334         if (r > 0) {
 335                 assert_se(startswith(command, "/"));
 336                 free(command);
 337         }
 338 }
 339
 340 TEST(status_field) {
 341         _cleanup_free_ char *p = NULL, *s = NULL, *z = NULL;
 342         unsigned long long total = 0, buffers = 0;
 343         int r;
 344
 345         r = get_proc_field("/proc/meminfo", "MemTotal", WHITESPACE, &p);
 346         if (r != -ENOENT) {
 347                 assert_se(r == 0);
 348                 puts(p);
 349                 assert_se(safe_atollu(p, &total) == 0);
 350         }
 351
 352         r = get_proc_field("/proc/meminfo", "Buffers", WHITESPACE, &s);
 353         if (r != -ENOENT) {
 354                 assert_se(r == 0);
 355                 puts(s);
 356                 assert_se(safe_atollu(s, &buffers) == 0);
 357         }
 358
 359         if (p)
 360                 assert_se(buffers < total);
 361
 362         /* Seccomp should be a good test for field full of zeros. */
 363         r = get_proc_field("/proc/meminfo", "Seccomp", WHITESPACE, &z);
 364         if (r != -ENOENT) {
 365                 assert_se(r == 0);
 366                 puts(z);
 367                 assert_se(safe_atollu(z, &buffers) == 0);
 368         }
 369 }
 370
 371 TEST(capeff) {
 372         for (int pid = 0; pid < 2; pid++) {
 373                 _cleanup_free_ char *capeff = NULL;
 374                 int r, p;
 375
 376                 r = get_process_capeff(0, &capeff);
 377                 log_info("capeff: '%s' (r=%d)", capeff, r);
 378
 379                 if (IN_SET(r, -ENOENT, -EPERM))
 380                         return;
 381
 382                 assert_se(r == 0);
 383                 assert_se(*capeff);
 384                 p = capeff[strspn(capeff, HEXDIGITS)];
 385                 assert_se(!p || isspace(p));
 386         }
 387 }
 388
 389 TEST(read_one_line_file) {
 390         _cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-fileio-1lf-XXXXXX";
 391         int fd;
 392         _cleanup_fclose_ FILE *f = NULL;
 393         _cleanup_free_ char *buf, *buf2, *buf3, *buf4, *buf5;
 394
 395         fd = mkostemp_safe(fn);
 396         assert_se(fd >= 0);
 397
 398         f = fdopen(fd, "we");
 399         assert_se(f);
 400
 401         assert_se(read_one_line_file(fn, &buf) == 0);
 402         assert_se(streq_ptr(buf, ""));
 403         assert_se(read_one_line_file(fn, &buf2) == 0);
 404         assert_se(streq_ptr(buf2, ""));
 405
 406         assert_se(write_string_stream(f, "x", WRITE_STRING_FILE_AVOID_NEWLINE) >= 0);
 407         fflush(f);
 408
 409         assert_se(read_one_line_file(fn, &buf3) == 1);
 410         assert_se(streq_ptr(buf3, "x"));
 411
 412         assert_se(write_string_stream(f, "\n", WRITE_STRING_FILE_AVOID_NEWLINE) >= 0);
 413         fflush(f);
 414
 415         assert_se(read_one_line_file(fn, &buf4) == 2);
 416         assert_se(streq_ptr(buf4, "x"));
 417
 418         assert_se(write_string_stream(f, "\n", WRITE_STRING_FILE_AVOID_NEWLINE) >= 0);
 419         fflush(f);
 420
 421         assert_se(read_one_line_file(fn, &buf5) == 2);
 422         assert_se(streq_ptr(buf5, "x"));
 423 }
 424
 425 TEST(write_string_stream) {
 426         _cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-write_string_stream-XXXXXX";
 427         _cleanup_fclose_ FILE *f = NULL;
 428         int fd;
 429         char buf[64];
 430
 431         fd = mkostemp_safe(fn);
 432         assert_se(fd >= 0);
 433
 434         f = fdopen(fd, "r");
 435         assert_se(f);
 436         assert_se(write_string_stream(f, "boohoo", 0) < 0);
 437         f = safe_fclose(f);
 438
 439         f = fopen(fn, "r+");
 440         assert_se(f);
 441
 442         assert_se(write_string_stream(f, "boohoo", 0) == 0);
 443         rewind(f);
 444
 445         assert_se(fgets(buf, sizeof(buf), f));
 446         assert_se(streq(buf, "boohoo\n"));
 447         f = safe_fclose(f);
 448
 449         f = fopen(fn, "w+");
 450         assert_se(f);
 451
 452         assert_se(write_string_stream(f, "boohoo", WRITE_STRING_FILE_AVOID_NEWLINE) == 0);
 453         rewind(f);
 454
 455         assert_se(fgets(buf, sizeof(buf), f));
 456         printf(">%s<", buf);
 457         assert_se(streq(buf, "boohoo"));
 458 }
 459
 460 TEST(write_string_file) {
 461         _cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-write_string_file-XXXXXX";
 462         char buf[64] = {};
 463         _cleanup_close_ int fd;
 464
 465         fd = mkostemp_safe(fn);
 466         assert_se(fd >= 0);
 467
 468         assert_se(write_string_file(fn, "boohoo", WRITE_STRING_FILE_CREATE) == 0);
 469
 470         assert_se(read(fd, buf, sizeof(buf)) == 7);
 471         assert_se(streq(buf, "boohoo\n"));
 472 }
 473
 474 TEST(write_string_file_no_create) {
 475         _cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-write_string_file_no_create-XXXXXX";
 476         _cleanup_close_ int fd;
 477         char buf[64] = {};
 478
 479         fd = mkostemp_safe(fn);
 480         assert_se(fd >= 0);
 481
 482         assert_se(write_string_file("/a/file/which/does/not/exists/i/guess", "boohoo", 0) < 0);
 483         assert_se(write_string_file(fn, "boohoo", 0) == 0);
 484
 485         assert_se(read(fd, buf, sizeof buf) == (ssize_t) strlen("boohoo\n"));
 486         assert_se(streq(buf, "boohoo\n"));
 487 }
 488
 489 TEST(write_string_file_verify) {
 490         _cleanup_free_ char *buf = NULL, *buf2 = NULL;
 491         int r;
 492
 493         r = read_one_line_file("/proc/version", &buf);
 494         if (ERRNO_IS_PRIVILEGE(r))
 495                 return;
 496         assert_se(r >= 0);
 497         assert_se(buf2 = strjoin(buf, "\n"));
 498
 499         r = write_string_file("/proc/version", buf, 0);
 500         assert_se(IN_SET(r, -EACCES, -EIO));
 501         r = write_string_file("/proc/version", buf2, 0);
 502         assert_se(IN_SET(r, -EACCES, -EIO));
 503
 504         assert_se(write_string_file("/proc/version", buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE) == 0);
 505         assert_se(write_string_file("/proc/version", buf2, WRITE_STRING_FILE_VERIFY_ON_FAILURE) == 0);
 506
 507         r = write_string_file("/proc/version", buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE|WRITE_STRING_FILE_AVOID_NEWLINE);
 508         assert_se(IN_SET(r, -EACCES, -EIO));
 509         assert_se(write_string_file("/proc/version", buf2, WRITE_STRING_FILE_VERIFY_ON_FAILURE|WRITE_STRING_FILE_AVOID_NEWLINE) == 0);
 510 }
 511
 512 static void check_file_pairs_one(char **l) {
 513         assert_se(l);
 514         assert_se(strv_length(l) == 14);
 515
 516         STRV_FOREACH_PAIR(k, v, l) {
 517                 assert_se(STR_IN_SET(*k, "NAME", "ID", "PRETTY_NAME", "ANSI_COLOR", "HOME_URL", "SUPPORT_URL", "BUG_REPORT_URL"));
 518                 printf("%s=%s\n", *k, *v);
 519                 assert_se(!streq(*k, "NAME") || streq(*v, "Arch Linux"));
 520                 assert_se(!streq(*k, "ID") || streq(*v, "arch"));
 521                 assert_se(!streq(*k, "PRETTY_NAME") || streq(*v, "Arch Linux"));
 522                 assert_se(!streq(*k, "ANSI_COLOR") || streq(*v, "0;36"));
 523                 assert_se(!streq(*k, "HOME_URL") || streq(*v, "https://www.archlinux.org/"));
 524                 assert_se(!streq(*k, "SUPPORT_URL") || streq(*v, "https://bbs.archlinux.org/"));
 525                 assert_se(!streq(*k, "BUG_REPORT_URL") || streq(*v, "https://bugs.archlinux.org/"));
 526         }
 527 }
 528
 529 TEST(load_env_file_pairs) {
 530         _cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-load_env_file_pairs-XXXXXX";
 531         int fd, r;
 532         _cleanup_fclose_ FILE *f = NULL;
 533         _cleanup_strv_free_ char **l = NULL;
 534
 535         fd = mkostemp_safe(fn);
 536         assert_se(fd >= 0);
 537
 538         r = write_string_file(fn,
 539                         "NAME=\"Arch Linux\"\n"
 540                         "ID=arch\n"
 541                         "PRETTY_NAME=\"Arch Linux\"\n"
 542                         "ANSI_COLOR=\"0;36\"\n"
 543                         "HOME_URL=\"https://www.archlinux.org/\"\n"
 544                         "SUPPORT_URL=\"https://bbs.archlinux.org/\"\n"
 545                         "BUG_REPORT_URL=\"https://bugs.archlinux.org/\"\n",
 546                         WRITE_STRING_FILE_CREATE);
 547         assert_se(r == 0);
 548
 549         r = load_env_file_pairs_fd(fd, fn, &l);
 550         assert_se(r >= 0);
 551         check_file_pairs_one(l);
 552         l = strv_free(l);
 553
 554         f = fdopen(fd, "r");
 555         assert_se(f);
 556
 557         r = load_env_file_pairs(f, fn, &l);
 558         assert_se(r >= 0);
 559         check_file_pairs_one(l);
 560 }
 561
 562 TEST(search_and_fopen) {
 563         static const char* const dirs[] = {
 564                 "/tmp/foo/bar",
 565                 "/tmp",
 566                 NULL
 567         };
 568         char name[] = "/tmp/test-search_and_fopen.XXXXXX";
 569         _cleanup_fclose_ FILE *f = NULL;
 570         _cleanup_free_ char *p = NULL;
 571         _cleanup_close_ int fd = -EBADF;
 572         const char *e;
 573         int r;
 574
 575         fd = mkostemp_safe(name);
 576         assert_se(fd >= 0);
 577         fd = safe_close(fd);
 578
 579         r = search_and_fopen(basename(name), "re", NULL, (const char**) dirs, &f, &p);
 580         assert_se(r >= 0);
 581         assert_se(e = path_startswith(p, "/tmp/"));
 582         assert_se(streq(basename(name), e));
 583         f = safe_fclose(f);
 584         p = mfree(p);
 585
 586         r = search_and_fopen(name, "re", NULL, (const char**) dirs, &f, &p);
 587         assert_se(r >= 0);
 588         assert_se(path_equal(name, p));
 589         f = safe_fclose(f);
 590         p = mfree(p);
 591
 592         r = search_and_fopen(basename(name), "re", "/", (const char**) dirs, &f, &p);
 593         assert_se(r >= 0);
 594         assert_se(e = path_startswith(p, "/tmp/"));
 595         assert_se(streq(basename(name), e));
 596         f = safe_fclose(f);
 597         p = mfree(p);
 598
 599         r = search_and_fopen("/a/file/which/does/not/exist/i/guess", "re", NULL, (const char**) dirs, &f, &p);
 600         assert_se(r == -ENOENT);
 601         r = search_and_fopen("afilewhichdoesnotexistiguess", "re", NULL, (const char**) dirs, &f, &p);
 602         assert_se(r == -ENOENT);
 603
 604         r = unlink(name);
 605         assert_se(r == 0);
 606
 607         r = search_and_fopen(basename(name), "re", NULL, (const char**) dirs, &f, &p);
 608         assert_se(r == -ENOENT);
 609 }
 610
 611 TEST(search_and_fopen_nulstr) {
 612         static const char dirs[] =
 613                 "/tmp/foo/bar\0"
 614                 "/tmp\0";
 615
 616         _cleanup_(unlink_tempfilep) char name[] = "/tmp/test-search_and_fopen.XXXXXX";
 617         _cleanup_fclose_ FILE *f = NULL;
 618         _cleanup_free_ char *p = NULL;
 619         _cleanup_close_ int fd = -EBADF;
 620         const char *e;
 621         int r;
 622
 623         fd = mkostemp_safe(name);
 624         assert_se(fd >= 0);
 625         fd = safe_close(fd);
 626
 627         r = search_and_fopen_nulstr(basename(name), "re", NULL, dirs, &f, &p);
 628         assert_se(r >= 0);
 629         assert_se(e = path_startswith(p, "/tmp/"));
 630         assert_se(streq(basename(name), e));
 631         f = safe_fclose(f);
 632         p = mfree(p);
 633
 634         r = search_and_fopen_nulstr(name, "re", NULL, dirs, &f, &p);
 635         assert_se(r >= 0);
 636         assert_se(path_equal(name, p));
 637         f = safe_fclose(f);
 638         p = mfree(p);
 639
 640         r = search_and_fopen_nulstr("/a/file/which/does/not/exist/i/guess", "re", NULL, dirs, &f, &p);
 641         assert_se(r == -ENOENT);
 642         r = search_and_fopen_nulstr("afilewhichdoesnotexistiguess", "re", NULL, dirs, &f, &p);
 643         assert_se(r == -ENOENT);
 644
 645         r = unlink(name);
 646         assert_se(r == 0);
 647
 648         r = search_and_fopen_nulstr(basename(name), "re", NULL, dirs, &f, &p);
 649         assert_se(r == -ENOENT);
 650 }
 651
 652 TEST(writing_tmpfile) {
 653         _cleanup_(unlink_tempfilep) char name[] = "/tmp/test-systemd_writing_tmpfile.XXXXXX";
 654         _cleanup_free_ char *contents = NULL;
 655         size_t size;
 656         _cleanup_close_ int fd = -EBADF;
 657         int r;
 658
 659         struct iovec iov[] = {
 660                 IOVEC_MAKE_STRING("abc\n"),
 661                 IOVEC_MAKE_STRING(ALPHANUMERICAL "\n"),
 662                 IOVEC_MAKE_STRING(""),
 663         };
 664
 665         fd = mkostemp_safe(name);
 666         printf("tmpfile: %s", name);
 667
 668         r = writev(fd, iov, 3);
 669         assert_se(r >= 0);
 670
 671         r = read_full_file(name, &contents, &size);
 672         assert_se(r == 0);
 673         printf("contents: %s", contents);
 674         assert_se(streq(contents, "abc\n" ALPHANUMERICAL "\n"));
 675 }
 676
 677 TEST(tempfn) {
 678         char *ret = NULL, *p;
 679
 680         assert_se(tempfn_xxxxxx("/foo/bar/waldo", NULL, &ret) >= 0);
 681         assert_se(streq_ptr(ret, "/foo/bar/.#waldoXXXXXX"));
 682         free(ret);
 683
 684         assert_se(tempfn_xxxxxx("/foo/bar/waldo", "[miau]", &ret) >= 0);
 685         assert_se(streq_ptr(ret, "/foo/bar/.#[miau]waldoXXXXXX"));
 686         free(ret);
 687
 688         assert_se(tempfn_random("/foo/bar/waldo", NULL, &ret) >= 0);
 689         assert_se(p = startswith(ret, "/foo/bar/.#waldo"));
 690         assert_se(strlen(p) == 16);
 691         assert_se(in_charset(p, "0123456789abcdef"));
 692         free(ret);
 693
 694         assert_se(tempfn_random("/foo/bar/waldo", "[wuff]", &ret) >= 0);
 695         assert_se(p = startswith(ret, "/foo/bar/.#[wuff]waldo"));
 696         assert_se(strlen(p) == 16);
 697         assert_se(in_charset(p, "0123456789abcdef"));
 698         free(ret);
 699
 700         assert_se(tempfn_random_child("/foo/bar/waldo", NULL, &ret) >= 0);
 701         assert_se(p = startswith(ret, "/foo/bar/waldo/.#"));
 702         assert_se(strlen(p) == 16);
 703         assert_se(in_charset(p, "0123456789abcdef"));
 704         free(ret);
 705
 706         assert_se(tempfn_random_child("/foo/bar/waldo", "[kikiriki]", &ret) >= 0);
 707         assert_se(p = startswith(ret, "/foo/bar/waldo/.#[kikiriki]"));
 708         assert_se(strlen(p) == 16);
 709         assert_se(in_charset(p, "0123456789abcdef"));
 710         free(ret);
 711 }
 712
 713 static const char chars[] =
 714         "Aąę„”\n루\377";
 715
 716 DISABLE_WARNING_TYPE_LIMITS;
 717
 718 TEST(fgetc) {
 719         _cleanup_fclose_ FILE *f = NULL;
 720         char c;
 721
 722         assert_se(f = fmemopen_unlocked((void*) chars, sizeof(chars), "r"));
 723
 724         for (size_t i = 0; i < sizeof(chars); i++) {
 725                 assert_se(safe_fgetc(f, &c) == 1);
 726                 assert_se(c == chars[i]);
 727
 728                 if (ungetc(c, f) == EOF) {
 729                         /* EOF is -1, and hence we can't push value 255 in this way – if char is signed */
 730                         assert_se(c == (char) EOF);
 731                         assert_se(CHAR_MIN == -128); /* verify that char is signed on this platform */
 732                 } else {
 733                         assert_se(safe_fgetc(f, &c) == 1);
 734                         assert_se(c == chars[i]);
 735                 }
 736
 737                 /* But it works when we push it properly cast */
 738                 assert_se(ungetc((unsigned char) c, f) != EOF);
 739                 assert_se(safe_fgetc(f, &c) == 1);
 740                 assert_se(c == chars[i]);
 741         }
 742
 743         assert_se(safe_fgetc(f, &c) == 0);
 744 }
 745
 746 REENABLE_WARNING;
 747
 748 static const char buffer[] =
 749         "Some test data\n"
 750         "루Non-ascii chars: ąę„”\n"
 751         "terminators\r\n"
 752         "and even more\n\r"
 753         "now the same with a NUL\n\0"
 754         "and more\r\0"
 755         "and even more\r\n\0"
 756         "and yet even more\n\r\0"
 757         "With newlines, and a NUL byte\0"
 758         "\n"
 759         "an empty line\n"
 760         "an ignored line\n"
 761         "and a very long line that is supposed to be truncated, because it is so long\n";
 762
 763 static void test_read_line_one_file(FILE *f) {
 764         _cleanup_free_ char *line = NULL;
 765
 766         assert_se(read_line(f, SIZE_MAX, &line) == 15 && streq(line, "Some test data"));
 767         line = mfree(line);
 768
 769         assert_se(read_line(f, SIZE_MAX, &line) > 0 && streq(line, "루Non-ascii chars: ąę„”"));
 770         line = mfree(line);
 771
 772         assert_se(read_line(f, SIZE_MAX, &line) == 13 && streq(line, "terminators"));
 773         line = mfree(line);
 774
 775         assert_se(read_line(f, SIZE_MAX, &line) == 15 && streq(line, "and even more"));
 776         line = mfree(line);
 777
 778         assert_se(read_line(f, SIZE_MAX, &line) == 25 && streq(line, "now the same with a NUL"));
 779         line = mfree(line);
 780
 781         assert_se(read_line(f, SIZE_MAX, &line) == 10 && streq(line, "and more"));
 782         line = mfree(line);
 783
 784         assert_se(read_line(f, SIZE_MAX, &line) == 16 && streq(line, "and even more"));
 785         line = mfree(line);
 786
 787         assert_se(read_line(f, SIZE_MAX, &line) == 20 && streq(line, "and yet even more"));
 788         line = mfree(line);
 789
 790         assert_se(read_line(f, 1024, &line) == 30 && streq(line, "With newlines, and a NUL byte"));
 791         line = mfree(line);
 792
 793         assert_se(read_line(f, 1024, &line) == 1 && streq(line, ""));
 794         line = mfree(line);
 795
 796         assert_se(read_line(f, 1024, &line) == 14 && streq(line, "an empty line"));
 797         line = mfree(line);
 798
 799         assert_se(read_line(f, SIZE_MAX, NULL) == 16);
 800
 801         assert_se(read_line(f, 16, &line) == -ENOBUFS);
 802         line = mfree(line);
 803
 804         /* read_line() stopped when it hit the limit, that means when we continue reading we'll read at the first
 805          * character after the previous limit. Let's make use of that to continue our test. */
 806         assert_se(read_line(f, 1024, &line) == 62 && streq(line, "line that is supposed to be truncated, because it is so long"));
 807         line = mfree(line);
 808
 809         assert_se(read_line(f, 1024, &line) == 0 && streq(line, ""));
 810 }
 811
 812 TEST(read_line1) {
 813         _cleanup_fclose_ FILE *f = NULL;
 814
 815         assert_se(f = fmemopen_unlocked((void*) buffer, sizeof(buffer), "r"));
 816         test_read_line_one_file(f);
 817 }
 818
 819 TEST(read_line2) {
 820         _cleanup_(unlink_tempfilep) char name[] = "/tmp/test-fileio.XXXXXX";
 821         int fd;
 822         _cleanup_fclose_ FILE *f = NULL;
 823
 824         fd = mkostemp_safe(name);
 825         assert_se(fd >= 0);
 826         assert_se((size_t) write(fd, buffer, sizeof(buffer)) == sizeof(buffer));
 827
 828         assert_se(lseek(fd, 0, SEEK_SET) == 0);
 829         assert_se(f = fdopen(fd, "r"));
 830
 831         test_read_line_one_file(f);
 832 }
 833
 834 TEST(read_line3) {
 835         _cleanup_fclose_ FILE *f = NULL;
 836         _cleanup_free_ char *line = NULL;
 837         int r;
 838
 839         f = fopen("/proc/uptime", "re");
 840         if (!f && IN_SET(errno, ENOENT, EPERM))
 841                 return;
 842         assert_se(f);
 843
 844         r = read_line(f, LINE_MAX, &line);
 845         assert_se(r >= 0);
 846         if (r == 0)
 847                 assert_se(line && isempty(line));
 848         else
 849                 assert_se((size_t) r == strlen(line) + 1);
 850         assert_se(read_line(f, LINE_MAX, NULL) == 0);
 851 }
 852
 853 TEST(read_line4) {
 854         static const struct {
 855                 size_t length;
 856                 const char *string;
 857         } eof_endings[] = {
 858                 /* Each of these will be followed by EOF and should generate the one same single string */
 859                 { 3, "foo" },
 860                 { 4, "foo\n" },
 861                 { 4, "foo\r" },
 862                 { 4, "foo\0" },
 863                 { 5, "foo\n\0" },
 864                 { 5, "foo\r\0" },
 865                 { 5, "foo\r\n" },
 866                 { 5, "foo\n\r" },
 867                 { 6, "foo\r\n\0" },
 868                 { 6, "foo\n\r\0" },
 869         };
 870
 871         int r;
 872
 873         for (size_t i = 0; i < ELEMENTSOF(eof_endings); i++) {
 874                 _cleanup_fclose_ FILE *f = NULL;
 875                 _cleanup_free_ char *s = NULL;
 876
 877                 assert_se(f = fmemopen_unlocked((void*) eof_endings[i].string, eof_endings[i].length, "r"));
 878
 879                 r = read_line(f, SIZE_MAX, &s);
 880                 assert_se((size_t) r == eof_endings[i].length);
 881                 assert_se(streq_ptr(s, "foo"));
 882
 883                 assert_se(read_line(f, SIZE_MAX, NULL) == 0); /* Ensure we hit EOF */
 884         }
 885 }
 886
 887 TEST(read_nul_string) {
 888         static const char test[] = "string nr. 1\0"
 889                 "string nr. 2\n\0"
 890                 "\377empty string follows\0"
 891                 "\0"
 892                 "final string\n is empty\0"
 893                 "\0";
 894
 895         _cleanup_fclose_ FILE *f = NULL;
 896         _cleanup_free_ char *s = NULL;
 897
 898         assert_se(f = fmemopen_unlocked((void*) test, sizeof(test)-1, "r"));
 899
 900         assert_se(read_nul_string(f, LONG_LINE_MAX, &s) == 13 && streq_ptr(s, "string nr. 1"));
 901         s = mfree(s);
 902
 903         assert_se(read_nul_string(f, LONG_LINE_MAX, &s) == 14 && streq_ptr(s, "string nr. 2\n"));
 904         s = mfree(s);
 905
 906         assert_se(read_nul_string(f, LONG_LINE_MAX, &s) == 22 && streq_ptr(s, "\377empty string follows"));
 907         s = mfree(s);
 908
 909         assert_se(read_nul_string(f, LONG_LINE_MAX, &s) == 1 && streq_ptr(s, ""));
 910         s = mfree(s);
 911
 912         assert_se(read_nul_string(f, LONG_LINE_MAX, &s) == 23 && streq_ptr(s, "final string\n is empty"));
 913         s = mfree(s);
 914
 915         assert_se(read_nul_string(f, LONG_LINE_MAX, &s) == 1 && streq_ptr(s, ""));
 916         s = mfree(s);
 917
 918         assert_se(read_nul_string(f, LONG_LINE_MAX, &s) == 0 && streq_ptr(s, ""));
 919 }
 920
 921 TEST(read_full_file_socket) {
 922         _cleanup_(rm_rf_physical_and_freep) char *z = NULL;
 923         _cleanup_close_ int listener = -EBADF;
 924         _cleanup_free_ char *data = NULL, *clientname = NULL;
 925         union sockaddr_union sa;
 926         const char *j, *jj;
 927         size_t size;
 928         pid_t pid;
 929         int r;
 930
 931         listener = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0);
 932         assert_se(listener >= 0);
 933
 934         assert_se(mkdtemp_malloc(NULL, &z) >= 0);
 935         j = strjoina(z, "/socket");
 936
 937         assert_se(sockaddr_un_set_path(&sa.un, j) >= 0);
 938
 939         assert_se(bind(listener, &sa.sa, SOCKADDR_UN_LEN(sa.un)) >= 0);
 940         assert_se(listen(listener, 1) >= 0);
 941
 942         /* Make sure the socket doesn't fit into a struct sockaddr_un, but we can still access it */
 943         jj = strjoina(z, "/a_very_long_patha_very_long_patha_very_long_patha_very_long_patha_very_long_patha_very_long_patha_very_long_patha_very_long_path");
 944         assert_se(strlen(jj) > sizeof_field(struct sockaddr_un, sun_path));
 945         assert_se(rename(j, jj) >= 0);
 946
 947         /* Bind the *client* socket to some randomized name, to verify that this works correctly. */
 948         assert_se(asprintf(&clientname, "@%" PRIx64 "/test-bindname", random_u64()) >= 0);
 949
 950         r = safe_fork("(server)", FORK_DEATHSIG|FORK_LOG, &pid);
 951         assert_se(r >= 0);
 952         if (r == 0) {
 953                 union sockaddr_union peer = {};
 954                 socklen_t peerlen = sizeof(peer);
 955                 _cleanup_close_ int rfd = -EBADF;
 956                 /* child */
 957
 958                 rfd = accept4(listener, NULL, 0, SOCK_CLOEXEC);
 959                 assert_se(rfd >= 0);
 960
 961                 assert_se(getpeername(rfd, &peer.sa, &peerlen) >= 0);
 962
 963                 assert_se(peer.un.sun_family == AF_UNIX);
 964                 assert_se(peerlen > offsetof(struct sockaddr_un, sun_path));
 965                 assert_se(peer.un.sun_path[0] == 0);
 966                 assert_se(streq(peer.un.sun_path + 1, clientname + 1));
 967
 968 #define TEST_STR "This is a test\nreally."
 969
 970                 assert_se(write(rfd, TEST_STR, strlen(TEST_STR)) == strlen(TEST_STR));
 971                 _exit(EXIT_SUCCESS);
 972         }
 973
 974         assert_se(read_full_file_full(AT_FDCWD, jj, UINT64_MAX, SIZE_MAX, 0, NULL, &data, &size) == -ENXIO);
 975         assert_se(read_full_file_full(AT_FDCWD, jj, UINT64_MAX, SIZE_MAX, READ_FULL_FILE_CONNECT_SOCKET, clientname, &data, &size) >= 0);
 976         assert_se(size == strlen(TEST_STR));
 977         assert_se(streq(data, TEST_STR));
 978
 979         assert_se(wait_for_terminate_and_check("(server)", pid, WAIT_LOG) >= 0);
 980 #undef TEST_STR
 981 }
 982
 983 TEST(read_full_file_offset_size) {
 984         _cleanup_fclose_ FILE *f = NULL;
 985         _cleanup_(unlink_and_freep) char *fn = NULL;
 986         _cleanup_free_ char *rbuf = NULL;
 987         size_t rbuf_size;
 988         uint8_t buf[4711];
 989
 990         random_bytes(buf, sizeof(buf));
 991
 992         assert_se(tempfn_random_child(NULL, NULL, &fn) >= 0);
 993         assert_se(f = fopen(fn, "we"));
 994         assert_se(fwrite(buf, 1, sizeof(buf), f) == sizeof(buf));
 995         assert_se(fflush_and_check(f) >= 0);
 996
 997         assert_se(read_full_file_full(AT_FDCWD, fn, UINT64_MAX, SIZE_MAX, 0, NULL, &rbuf, &rbuf_size) >= 0);
 998         assert_se(rbuf_size == sizeof(buf));
 999         assert_se(memcmp(buf, rbuf, rbuf_size) == 0);
1000         rbuf = mfree(rbuf);
1001
1002         assert_se(read_full_file_full(AT_FDCWD, fn, UINT64_MAX, 128, 0, NULL, &rbuf, &rbuf_size) >= 0);
1003         assert_se(rbuf_size == 128);
1004         assert_se(memcmp(buf, rbuf, rbuf_size) == 0);
1005         rbuf = mfree(rbuf);
1006
1007         assert_se(read_full_file_full(AT_FDCWD, fn, UINT64_MAX, 128, READ_FULL_FILE_FAIL_WHEN_LARGER, NULL, &rbuf, &rbuf_size) == -E2BIG);
1008         assert_se(read_full_file_full(AT_FDCWD, fn, UINT64_MAX, sizeof(buf)-1, READ_FULL_FILE_FAIL_WHEN_LARGER, NULL, &rbuf, &rbuf_size) == -E2BIG);
1009         assert_se(read_full_file_full(AT_FDCWD, fn, UINT64_MAX, sizeof(buf), READ_FULL_FILE_FAIL_WHEN_LARGER, NULL, &rbuf, &rbuf_size) >= 0);
1010         assert_se(rbuf_size == sizeof(buf));
1011         assert_se(memcmp(buf, rbuf, rbuf_size) == 0);
1012         rbuf = mfree(rbuf);
1013
1014         assert_se(read_full_file_full(AT_FDCWD, fn, 47, 128, READ_FULL_FILE_FAIL_WHEN_LARGER, NULL, &rbuf, &rbuf_size) == -E2BIG);
1015         assert_se(read_full_file_full(AT_FDCWD, fn, 47, sizeof(buf)-47-1, READ_FULL_FILE_FAIL_WHEN_LARGER, NULL, &rbuf, &rbuf_size) == -E2BIG);
1016         assert_se(read_full_file_full(AT_FDCWD, fn, 47, sizeof(buf)-47, READ_FULL_FILE_FAIL_WHEN_LARGER, NULL, &rbuf, &rbuf_size) >= 0);
1017         assert_se(rbuf_size == sizeof(buf)-47);
1018         assert_se(memcmp(buf+47, rbuf, rbuf_size) == 0);
1019         rbuf = mfree(rbuf);
1020
1021         assert_se(read_full_file_full(AT_FDCWD, fn, UINT64_MAX, sizeof(buf)+1, READ_FULL_FILE_FAIL_WHEN_LARGER, NULL, &rbuf, &rbuf_size) >= 0);
1022         assert_se(rbuf_size == sizeof(buf));
1023         assert_se(memcmp(buf, rbuf, rbuf_size) == 0);
1024         rbuf = mfree(rbuf);
1025
1026         assert_se(read_full_file_full(AT_FDCWD, fn, 1234, SIZE_MAX, 0, NULL, &rbuf, &rbuf_size) >= 0);
1027         assert_se(rbuf_size == sizeof(buf) - 1234);
1028         assert_se(memcmp(buf + 1234, rbuf, rbuf_size) == 0);
1029         rbuf = mfree(rbuf);
1030
1031         assert_se(read_full_file_full(AT_FDCWD, fn, 2345, 777, 0, NULL, &rbuf, &rbuf_size) >= 0);
1032         assert_se(rbuf_size == 777);
1033         assert_se(memcmp(buf + 2345, rbuf, rbuf_size) == 0);
1034         rbuf = mfree(rbuf);
1035
1036         assert_se(read_full_file_full(AT_FDCWD, fn, 4700, 20, 0, NULL, &rbuf, &rbuf_size) >= 0);
1037         assert_se(rbuf_size == 11);
1038         assert_se(memcmp(buf + 4700, rbuf, rbuf_size) == 0);
1039         rbuf = mfree(rbuf);
1040
1041         assert_se(read_full_file_full(AT_FDCWD, fn, 10000, 99, 0, NULL, &rbuf, &rbuf_size) >= 0);
1042         assert_se(rbuf_size == 0);
1043         rbuf = mfree(rbuf);
1044 }
1045
1046 static void test_read_virtual_file_one(size_t max_size) {
1047         int r;
1048
1049         log_info("/* %s (max_size=%zu) */", __func__, max_size);
1050
1051         FOREACH_STRING(filename,
1052                        "/proc/1/cmdline",
1053                        "/etc/nsswitch.conf",
1054                        "/sys/kernel/uevent_seqnum",
1055                        "/proc/kcore",
1056                        "/proc/kallsyms",
1057                        "/proc/self/exe",
1058                        "/proc/self/pagemap") {
1059
1060                 _cleanup_free_ char *buf = NULL;
1061                 size_t size = 0;
1062
1063                 r = read_virtual_file(filename, max_size, &buf, &size);
1064                 if (r < 0) {
1065                         log_info_errno(r, "read_virtual_file(\"%s\", %zu): %m", filename, max_size);
1066                         assert_se(ERRNO_IS_PRIVILEGE(r) || /* /proc/kcore is not accessible to unpriv */
1067                                   IN_SET(r,
1068                                          -ENOENT,  /* Some of the files might be absent */
1069                                          -EINVAL,  /* too small reads from /proc/self/pagemap trigger EINVAL */
1070                                          -EFBIG)); /* /proc/kcore and /proc/self/pagemap should be too large */
1071                 } else
1072                         log_info("read_virtual_file(\"%s\", %zu): %s (%zu bytes)", filename, max_size, r ? "non-truncated" : "truncated", size);
1073         }
1074 }
1075
1076 TEST(test_read_virtual_file) {
1077         test_read_virtual_file_one(0);
1078         test_read_virtual_file_one(1);
1079         test_read_virtual_file_one(2);
1080         test_read_virtual_file_one(20);
1081         test_read_virtual_file_one(4096);
1082         test_read_virtual_file_one(4097);
1083         test_read_virtual_file_one(SIZE_MAX);
1084 }
1085
1086 TEST(test_fdopen_independent) {
1087 #define TEST_TEXT "this is some random test text we are going to write to a memfd"
1088         _cleanup_close_ int fd = -EBADF;
1089         _cleanup_fclose_ FILE *f = NULL;
1090         char buf[STRLEN(TEST_TEXT) + 1];
1091
1092         fd = memfd_new("fdopen_independent");
1093         if (fd < 0) {
1094                 assert_se(ERRNO_IS_NOT_SUPPORTED(fd));
1095                 return;
1096         }
1097
1098         assert_se(write(fd, TEST_TEXT, strlen(TEST_TEXT)) == strlen(TEST_TEXT));
1099         /* we'll leave the read offset at the end of the memfd, the fdopen_independent() descriptors should
1100          * start at the beginning anyway */
1101
1102         assert_se(fdopen_independent(fd, "re", &f) >= 0);
1103         zero(buf);
1104         assert_se(fread(buf, 1, sizeof(buf), f) == strlen(TEST_TEXT));
1105         assert_se(streq(buf, TEST_TEXT));
1106         assert_se((fcntl(fileno(f), F_GETFL) & O_ACCMODE) == O_RDONLY);
1107         assert_se(FLAGS_SET(fcntl(fileno(f), F_GETFD), FD_CLOEXEC));
1108         f = safe_fclose(f);
1109
1110         assert_se(fdopen_independent(fd, "r", &f) >= 0);
1111         zero(buf);
1112         assert_se(fread(buf, 1, sizeof(buf), f) == strlen(TEST_TEXT));
1113         assert_se(streq(buf, TEST_TEXT));
1114         assert_se((fcntl(fileno(f), F_GETFL) & O_ACCMODE) == O_RDONLY);
1115         assert_se(!FLAGS_SET(fcntl(fileno(f), F_GETFD), FD_CLOEXEC));
1116         f = safe_fclose(f);
1117
1118         assert_se(fdopen_independent(fd, "r+e", &f) >= 0);
1119         zero(buf);
1120         assert_se(fread(buf, 1, sizeof(buf), f) == strlen(TEST_TEXT));
1121         assert_se(streq(buf, TEST_TEXT));
1122         assert_se((fcntl(fileno(f), F_GETFL) & O_ACCMODE) == O_RDWR);
1123         assert_se(FLAGS_SET(fcntl(fileno(f), F_GETFD), FD_CLOEXEC));
1124         f = safe_fclose(f);
1125 }
1126
1127
1128 DEFINE_TEST_MAIN(LOG_DEBUG);