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 "parse-util.h"
  18 #include "path-util.h"
  19 #include "process-util.h"
  20 #include "random-util.h"
  21 #include "rm-rf.h"
  22 #include "socket-util.h"
  23 #include "string-util.h"
  24 #include "strv.h"
  25 #include "tests.h"
  26 #include "tmpfile-util.h"
  27 #include "util.h"
  28
  29 static void test_parse_env_file(void) {
  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         char **i;
  39         unsigned k;
  40         int r;
  41
  42         assert_se(fmkostemp_safe(t, "w", &f) == 0);
  43         fputs("one=BAR   \n"
  44               "# comment\n"
  45               " # comment \n"
  46               " ; comment \n"
  47               "  two   =   bar    \n"
  48               "invalid line\n"
  49               "invalid line #comment\n"
  50               "three = \"333\n"
  51               "xxxx\"\n"
  52               "four = \'44\\\"44\'\n"
  53               "five = \"55\\\"55\" \"FIVE\" cinco   \n"
  54               "six = seis sechs\\\n"
  55               " sis\n"
  56               "seven=\"sevenval\" #nocomment\n"
  57               "eight=eightval #nocomment\n"
  58               "export nine=nineval\n"
  59               "ten=ignored\n"
  60               "ten=ignored\n"
  61               "ten=\n"
  62               "eleven=\\value\n"
  63               "twelve=\"\\value\"\n"
  64               "thirteen='\\value'", f);
  65
  66         fflush(f);
  67         fclose(f);
  68
  69         r = load_env_file(NULL, t, &a);
  70         assert_se(r >= 0);
  71
  72         STRV_FOREACH(i, a)
  73                 log_info("Got: <%s>", *i);
  74
  75         assert_se(streq_ptr(a[0], "one=BAR"));
  76         assert_se(streq_ptr(a[1], "two=bar"));
  77         assert_se(streq_ptr(a[2], "three=333\nxxxx"));
  78         assert_se(streq_ptr(a[3], "four=44\\\"44"));
  79         assert_se(streq_ptr(a[4], "five=55\"55FIVEcinco"));
  80         assert_se(streq_ptr(a[5], "six=seis sechs sis"));
  81         assert_se(streq_ptr(a[6], "seven=sevenval#nocomment"));
  82         assert_se(streq_ptr(a[7], "eight=eightval #nocomment"));
  83         assert_se(streq_ptr(a[8], "export nine=nineval"));
  84         assert_se(streq_ptr(a[9], "ten="));
  85         assert_se(streq_ptr(a[10], "eleven=value"));
  86         assert_se(streq_ptr(a[11], "twelve=\\value"));
  87         assert_se(streq_ptr(a[12], "thirteen=\\value"));
  88         assert_se(a[13] == NULL);
  89
  90         strv_env_clean(a);
  91
  92         k = 0;
  93         STRV_FOREACH(i, b) {
  94                 log_info("Got2: <%s>", *i);
  95                 assert_se(streq(*i, a[k++]));
  96         }
  97
  98         r = parse_env_file(
  99                         NULL, t,
 100                        "one", &one,
 101                        "two", &two,
 102                        "three", &three,
 103                        "four", &four,
 104                        "five", &five,
 105                        "six", &six,
 106                        "seven", &seven,
 107                        "eight", &eight,
 108                        "export nine", &nine,
 109                        "ten", &ten,
 110                        "eleven", &eleven,
 111                        "twelve", &twelve,
 112                        "thirteen", &thirteen);
 113
 114         assert_se(r >= 0);
 115
 116         log_info("one=[%s]", strna(one));
 117         log_info("two=[%s]", strna(two));
 118         log_info("three=[%s]", strna(three));
 119         log_info("four=[%s]", strna(four));
 120         log_info("five=[%s]", strna(five));
 121         log_info("six=[%s]", strna(six));
 122         log_info("seven=[%s]", strna(seven));
 123         log_info("eight=[%s]", strna(eight));
 124         log_info("export nine=[%s]", strna(nine));
 125         log_info("ten=[%s]", strna(nine));
 126         log_info("eleven=[%s]", strna(eleven));
 127         log_info("twelve=[%s]", strna(twelve));
 128         log_info("thirteen=[%s]", strna(thirteen));
 129
 130         assert_se(streq(one, "BAR"));
 131         assert_se(streq(two, "bar"));
 132         assert_se(streq(three, "333\nxxxx"));
 133         assert_se(streq(four, "44\\\"44"));
 134         assert_se(streq(five, "55\"55FIVEcinco"));
 135         assert_se(streq(six, "seis sechs sis"));
 136         assert_se(streq(seven, "sevenval#nocomment"));
 137         assert_se(streq(eight, "eightval #nocomment"));
 138         assert_se(streq(nine, "nineval"));
 139         assert_se(ten == NULL);
 140         assert_se(streq(eleven, "value"));
 141         assert_se(streq(twelve, "\\value"));
 142         assert_se(streq(thirteen, "\\value"));
 143
 144         {
 145                 /* prepare a temporary file to write the environment to */
 146                 _cleanup_close_ int fd = mkostemp_safe(p);
 147                 assert_se(fd >= 0);
 148         }
 149
 150         r = write_env_file(p, a);
 151         assert_se(r >= 0);
 152
 153         r = load_env_file(NULL, p, &b);
 154         assert_se(r >= 0);
 155 }
 156
 157 static void test_one_shell_var(const char *file, const char *variable, const char *value) {
 158         _cleanup_free_ char *cmd = NULL, *from_shell = NULL;
 159         _cleanup_pclose_ FILE *f = NULL;
 160         size_t sz;
 161
 162         assert_se(cmd = strjoin(". ", file, " && /bin/echo -n \"$", variable, "\""));
 163         assert_se(f = popen(cmd, "re"));
 164         assert_se(read_full_stream(f, &from_shell, &sz) >= 0);
 165         assert_se(sz == strlen(value));
 166         assert_se(streq(from_shell, value));
 167 }
 168
 169 static void test_parse_multiline_env_file(void) {
 170         _cleanup_(unlink_tempfilep) char
 171                 t[] = "/tmp/test-fileio-in-XXXXXX",
 172                 p[] = "/tmp/test-fileio-out-XXXXXX";
 173         FILE *f;
 174         _cleanup_strv_free_ char **a = NULL, **b = NULL;
 175         char **i;
 176         int r;
 177
 178         assert_se(fmkostemp_safe(t, "w", &f) == 0);
 179         fputs("one=BAR\\\n"
 180               "\\ \\ \\ \\ VAR\\\n"
 181               "\\\tGAR\n"
 182               "#comment\n"
 183               "two=\"bar\\\n"
 184               "    var\\\n"
 185               "\tgar\"\n"
 186               "#comment\n"
 187               "tri=\"bar \\\n"
 188               "    var \\\n"
 189               "\tgar \"\n", f);
 190
 191         assert_se(fflush_and_check(f) >= 0);
 192         fclose(f);
 193
 194         test_one_shell_var(t, "one", "BAR    VAR\tGAR");
 195         test_one_shell_var(t, "two", "bar    var\tgar");
 196         test_one_shell_var(t, "tri", "bar     var \tgar ");
 197
 198         r = load_env_file(NULL, t, &a);
 199         assert_se(r >= 0);
 200
 201         STRV_FOREACH(i, a)
 202                 log_info("Got: <%s>", *i);
 203
 204         assert_se(streq_ptr(a[0], "one=BAR    VAR\tGAR"));
 205         assert_se(streq_ptr(a[1], "two=bar    var\tgar"));
 206         assert_se(streq_ptr(a[2], "tri=bar     var \tgar "));
 207         assert_se(a[3] == NULL);
 208
 209         {
 210                 _cleanup_close_ int fd = mkostemp_safe(p);
 211                 assert_se(fd >= 0);
 212         }
 213
 214         r = write_env_file(p, a);
 215         assert_se(r >= 0);
 216
 217         r = load_env_file(NULL, p, &b);
 218         assert_se(r >= 0);
 219 }
 220
 221 static void test_merge_env_file(void) {
 222         _cleanup_(unlink_tempfilep) char t[] = "/tmp/test-fileio-XXXXXX";
 223         _cleanup_fclose_ FILE *f = NULL;
 224         _cleanup_strv_free_ char **a = NULL;
 225         char **i;
 226         int r;
 227
 228         assert_se(fmkostemp_safe(t, "w", &f) == 0);
 229         log_info("/* %s (%s) */", __func__, t);
 230
 231         r = write_string_stream(f,
 232                                 "one=1   \n"
 233                                 "twelve=${one}2\n"
 234                                 "twentyone=2${one}\n"
 235                                 "one=2\n"
 236                                 "twentytwo=2${one}\n"
 237                                 "xxx_minus_three=$xxx - 3\n"
 238                                 "xxx=0x$one$one$one\n"
 239                                 "yyy=${one:-fallback}\n"
 240                                 "zzz=${one:+replacement}\n"
 241                                 "zzzz=${foobar:-${nothing}}\n"
 242                                 "zzzzz=${nothing:+${nothing}}\n"
 243                                 , WRITE_STRING_FILE_AVOID_NEWLINE);
 244         assert(r >= 0);
 245
 246         r = merge_env_file(&a, NULL, t);
 247         assert_se(r >= 0);
 248         strv_sort(a);
 249
 250         STRV_FOREACH(i, a)
 251                 log_info("Got: <%s>", *i);
 252
 253         assert_se(streq(a[0], "one=2"));
 254         assert_se(streq(a[1], "twelve=12"));
 255         assert_se(streq(a[2], "twentyone=21"));
 256         assert_se(streq(a[3], "twentytwo=22"));
 257         assert_se(streq(a[4], "xxx=0x222"));
 258         assert_se(streq(a[5], "xxx_minus_three= - 3"));
 259         assert_se(streq(a[6], "yyy=2"));
 260         assert_se(streq(a[7], "zzz=replacement"));
 261         assert_se(streq(a[8], "zzzz="));
 262         assert_se(streq(a[9], "zzzzz="));
 263         assert_se(a[10] == NULL);
 264
 265         r = merge_env_file(&a, NULL, t);
 266         assert_se(r >= 0);
 267         strv_sort(a);
 268
 269         STRV_FOREACH(i, a)
 270                 log_info("Got2: <%s>", *i);
 271
 272         assert_se(streq(a[0], "one=2"));
 273         assert_se(streq(a[1], "twelve=12"));
 274         assert_se(streq(a[2], "twentyone=21"));
 275         assert_se(streq(a[3], "twentytwo=22"));
 276         assert_se(streq(a[4], "xxx=0x222"));
 277         assert_se(streq(a[5], "xxx_minus_three=0x222 - 3"));
 278         assert_se(streq(a[6], "yyy=2"));
 279         assert_se(streq(a[7], "zzz=replacement"));
 280         assert_se(streq(a[8], "zzzz="));
 281         assert_se(streq(a[9], "zzzzz="));
 282         assert_se(a[10] == NULL);
 283 }
 284
 285 static void test_merge_env_file_invalid(void) {
 286         _cleanup_(unlink_tempfilep) char t[] = "/tmp/test-fileio-XXXXXX";
 287         _cleanup_fclose_ FILE *f = NULL;
 288         _cleanup_strv_free_ char **a = NULL;
 289         char **i;
 290         int r;
 291
 292         assert_se(fmkostemp_safe(t, "w", &f) == 0);
 293         log_info("/* %s (%s) */", __func__, t);
 294
 295         r = write_string_stream(f,
 296                                 "unset one   \n"
 297                                 "unset one=   \n"
 298                                 "unset one=1   \n"
 299                                 "one   \n"
 300                                 "one =  \n"
 301                                 "one two =\n"
 302                                 "\x20two=\n"
 303                                 "#comment=comment\n"
 304                                 ";comment2=comment2\n"
 305                                 "#\n"
 306                                 "\n\n"                  /* empty line */
 307                                 , WRITE_STRING_FILE_AVOID_NEWLINE);
 308         assert(r >= 0);
 309
 310         r = merge_env_file(&a, NULL, t);
 311         assert_se(r >= 0);
 312
 313         STRV_FOREACH(i, a)
 314                 log_info("Got: <%s>", *i);
 315
 316         assert_se(strv_isempty(a));
 317 }
 318
 319 static void test_executable_is_script(void) {
 320         _cleanup_(unlink_tempfilep) char t[] = "/tmp/test-fileio-XXXXXX";
 321         _cleanup_fclose_ FILE *f = NULL;
 322         char *command;
 323         int r;
 324
 325         assert_se(fmkostemp_safe(t, "w", &f) == 0);
 326         fputs("#! /bin/script -a -b \ngoo goo", f);
 327         fflush(f);
 328
 329         r = executable_is_script(t, &command);
 330         assert_se(r > 0);
 331         assert_se(streq(command, "/bin/script"));
 332         free(command);
 333
 334         r = executable_is_script("/bin/sh", &command);
 335         assert_se(r == 0);
 336
 337         r = executable_is_script("/usr/bin/yum", &command);
 338         assert_se(r > 0 || r == -ENOENT);
 339         if (r > 0) {
 340                 assert_se(startswith(command, "/"));
 341                 free(command);
 342         }
 343 }
 344
 345 static void test_status_field(void) {
 346         _cleanup_free_ char *t = NULL, *p = NULL, *s = NULL, *z = NULL;
 347         unsigned long long total = 0, buffers = 0;
 348         int r;
 349
 350         assert_se(get_proc_field("/proc/self/status", "Threads", WHITESPACE, &t) == 0);
 351         puts(t);
 352         assert_se(streq(t, "1"));
 353
 354         r = get_proc_field("/proc/meminfo", "MemTotal", WHITESPACE, &p);
 355         if (r != -ENOENT) {
 356                 assert_se(r == 0);
 357                 puts(p);
 358                 assert_se(safe_atollu(p, &total) == 0);
 359         }
 360
 361         r = get_proc_field("/proc/meminfo", "Buffers", WHITESPACE, &s);
 362         if (r != -ENOENT) {
 363                 assert_se(r == 0);
 364                 puts(s);
 365                 assert_se(safe_atollu(s, &buffers) == 0);
 366         }
 367
 368         if (p)
 369                 assert_se(buffers < total);
 370
 371         /* Seccomp should be a good test for field full of zeros. */
 372         r = get_proc_field("/proc/meminfo", "Seccomp", WHITESPACE, &z);
 373         if (r != -ENOENT) {
 374                 assert_se(r == 0);
 375                 puts(z);
 376                 assert_se(safe_atollu(z, &buffers) == 0);
 377         }
 378 }
 379
 380 static void test_capeff(void) {
 381         int pid, p;
 382
 383         for (pid = 0; pid < 2; pid++) {
 384                 _cleanup_free_ char *capeff = NULL;
 385                 int r;
 386
 387                 r = get_process_capeff(0, &capeff);
 388                 log_info("capeff: '%s' (r=%d)", capeff, r);
 389
 390                 if (IN_SET(r, -ENOENT, -EPERM))
 391                         return;
 392
 393                 assert_se(r == 0);
 394                 assert_se(*capeff);
 395                 p = capeff[strspn(capeff, HEXDIGITS)];
 396                 assert_se(!p || isspace(p));
 397         }
 398 }
 399
 400 static void test_write_string_stream(void) {
 401         _cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-write_string_stream-XXXXXX";
 402         _cleanup_fclose_ FILE *f = NULL;
 403         int fd;
 404         char buf[64];
 405
 406         fd = mkostemp_safe(fn);
 407         assert_se(fd >= 0);
 408
 409         f = fdopen(fd, "r");
 410         assert_se(f);
 411         assert_se(write_string_stream(f, "boohoo", 0) < 0);
 412         f = safe_fclose(f);
 413
 414         f = fopen(fn, "r+");
 415         assert_se(f);
 416
 417         assert_se(write_string_stream(f, "boohoo", 0) == 0);
 418         rewind(f);
 419
 420         assert_se(fgets(buf, sizeof(buf), f));
 421         assert_se(streq(buf, "boohoo\n"));
 422         f = safe_fclose(f);
 423
 424         f = fopen(fn, "w+");
 425         assert_se(f);
 426
 427         assert_se(write_string_stream(f, "boohoo", WRITE_STRING_FILE_AVOID_NEWLINE) == 0);
 428         rewind(f);
 429
 430         assert_se(fgets(buf, sizeof(buf), f));
 431         printf(">%s<", buf);
 432         assert_se(streq(buf, "boohoo"));
 433 }
 434
 435 static void test_write_string_file(void) {
 436         _cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-write_string_file-XXXXXX";
 437         char buf[64] = {};
 438         _cleanup_close_ int fd;
 439
 440         fd = mkostemp_safe(fn);
 441         assert_se(fd >= 0);
 442
 443         assert_se(write_string_file(fn, "boohoo", WRITE_STRING_FILE_CREATE) == 0);
 444
 445         assert_se(read(fd, buf, sizeof(buf)) == 7);
 446         assert_se(streq(buf, "boohoo\n"));
 447 }
 448
 449 static void test_write_string_file_no_create(void) {
 450         _cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-write_string_file_no_create-XXXXXX";
 451         _cleanup_close_ int fd;
 452         char buf[64] = {};
 453
 454         fd = mkostemp_safe(fn);
 455         assert_se(fd >= 0);
 456
 457         assert_se(write_string_file("/a/file/which/does/not/exists/i/guess", "boohoo", 0) < 0);
 458         assert_se(write_string_file(fn, "boohoo", 0) == 0);
 459
 460         assert_se(read(fd, buf, sizeof buf) == (ssize_t) strlen("boohoo\n"));
 461         assert_se(streq(buf, "boohoo\n"));
 462 }
 463
 464 static void test_write_string_file_verify(void) {
 465         _cleanup_free_ char *buf = NULL, *buf2 = NULL;
 466         int r;
 467
 468         r = read_one_line_file("/proc/version", &buf);
 469         if (ERRNO_IS_PRIVILEGE(r))
 470                 return;
 471         assert_se(r >= 0);
 472         assert_se(buf2 = strjoin(buf, "\n"));
 473
 474         r = write_string_file("/proc/version", buf, 0);
 475         assert_se(IN_SET(r, -EACCES, -EIO));
 476         r = write_string_file("/proc/version", buf2, 0);
 477         assert_se(IN_SET(r, -EACCES, -EIO));
 478
 479         assert_se(write_string_file("/proc/version", buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE) == 0);
 480         assert_se(write_string_file("/proc/version", buf2, WRITE_STRING_FILE_VERIFY_ON_FAILURE) == 0);
 481
 482         r = write_string_file("/proc/version", buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE|WRITE_STRING_FILE_AVOID_NEWLINE);
 483         assert_se(IN_SET(r, -EACCES, -EIO));
 484         assert_se(write_string_file("/proc/version", buf2, WRITE_STRING_FILE_VERIFY_ON_FAILURE|WRITE_STRING_FILE_AVOID_NEWLINE) == 0);
 485 }
 486
 487 static void test_load_env_file_pairs(void) {
 488         _cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-load_env_file_pairs-XXXXXX";
 489         int fd, r;
 490         _cleanup_fclose_ FILE *f = NULL;
 491         _cleanup_strv_free_ char **l = NULL;
 492         char **k, **v;
 493
 494         fd = mkostemp_safe(fn);
 495         assert_se(fd >= 0);
 496
 497         r = write_string_file(fn,
 498                         "NAME=\"Arch Linux\"\n"
 499                         "ID=arch\n"
 500                         "PRETTY_NAME=\"Arch Linux\"\n"
 501                         "ANSI_COLOR=\"0;36\"\n"
 502                         "HOME_URL=\"https://www.archlinux.org/\"\n"
 503                         "SUPPORT_URL=\"https://bbs.archlinux.org/\"\n"
 504                         "BUG_REPORT_URL=\"https://bugs.archlinux.org/\"\n",
 505                         WRITE_STRING_FILE_CREATE);
 506         assert_se(r == 0);
 507
 508         f = fdopen(fd, "r");
 509         assert_se(f);
 510
 511         r = load_env_file_pairs(f, fn, &l);
 512         assert_se(r >= 0);
 513
 514         assert_se(strv_length(l) == 14);
 515         STRV_FOREACH_PAIR(k, v, l) {
 516                 assert_se(STR_IN_SET(*k, "NAME", "ID", "PRETTY_NAME", "ANSI_COLOR", "HOME_URL", "SUPPORT_URL", "BUG_REPORT_URL"));
 517                 printf("%s=%s\n", *k, *v);
 518                 if (streq(*k, "NAME")) assert_se(streq(*v, "Arch Linux"));
 519                 if (streq(*k, "ID")) assert_se(streq(*v, "arch"));
 520                 if (streq(*k, "PRETTY_NAME")) assert_se(streq(*v, "Arch Linux"));
 521                 if (streq(*k, "ANSI_COLOR")) assert_se(streq(*v, "0;36"));
 522                 if (streq(*k, "HOME_URL")) assert_se(streq(*v, "https://www.archlinux.org/"));
 523                 if (streq(*k, "SUPPORT_URL")) assert_se(streq(*v, "https://bbs.archlinux.org/"));
 524                 if (streq(*k, "BUG_REPORT_URL")) assert_se(streq(*v, "https://bugs.archlinux.org/"));
 525         }
 526 }
 527
 528 static void test_search_and_fopen(void) {
 529         static const char* const dirs[] = {
 530                 "/tmp/foo/bar",
 531                 "/tmp",
 532                 NULL
 533         };
 534         char name[] = "/tmp/test-search_and_fopen.XXXXXX";
 535         _cleanup_fclose_ FILE *f = NULL;
 536         _cleanup_free_ char *p = NULL;
 537         _cleanup_close_ int fd = -1;
 538         const char *e;
 539         int r;
 540
 541         fd = mkostemp_safe(name);
 542         assert_se(fd >= 0);
 543         fd = safe_close(fd);
 544
 545         r = search_and_fopen(basename(name), "re", NULL, (const char**) dirs, &f, &p);
 546         assert_se(r >= 0);
 547         assert_se(e = path_startswith(p, "/tmp/"));
 548         assert_se(streq(basename(name), e));
 549         f = safe_fclose(f);
 550         p = mfree(p);
 551
 552         r = search_and_fopen(name, "re", NULL, (const char**) dirs, &f, &p);
 553         assert_se(r >= 0);
 554         assert_se(path_equal(name, p));
 555         f = safe_fclose(f);
 556         p = mfree(p);
 557
 558         r = search_and_fopen(basename(name), "re", "/", (const char**) dirs, &f, &p);
 559         assert_se(r >= 0);
 560         assert_se(e = path_startswith(p, "/tmp/"));
 561         assert_se(streq(basename(name), e));
 562         f = safe_fclose(f);
 563         p = mfree(p);
 564
 565         r = search_and_fopen("/a/file/which/does/not/exist/i/guess", "r", NULL, (const char**) dirs, &f, &p);
 566         assert_se(r == -ENOENT);
 567         r = search_and_fopen("afilewhichdoesnotexistiguess", "r", NULL, (const char**) dirs, &f, &p);
 568         assert_se(r == -ENOENT);
 569
 570         r = unlink(name);
 571         assert_se(r == 0);
 572
 573         r = search_and_fopen(basename(name), "r", NULL, (const char**) dirs, &f, &p);
 574         assert_se(r == -ENOENT);
 575 }
 576
 577 static void test_search_and_fopen_nulstr(void) {
 578         static const char dirs[] =
 579                 "/tmp/foo/bar\0"
 580                 "/tmp\0";
 581
 582         _cleanup_(unlink_tempfilep) char name[] = "/tmp/test-search_and_fopen.XXXXXX";
 583         _cleanup_fclose_ FILE *f = NULL;
 584         _cleanup_free_ char *p = NULL;
 585         _cleanup_close_ int fd = -1;
 586         const char *e;
 587         int r;
 588
 589         fd = mkostemp_safe(name);
 590         assert_se(fd >= 0);
 591         fd = safe_close(fd);
 592
 593         r = search_and_fopen_nulstr(basename(name), "re", NULL, dirs, &f, &p);
 594         assert_se(r >= 0);
 595         assert_se(e = path_startswith(p, "/tmp/"));
 596         assert_se(streq(basename(name), e));
 597         f = safe_fclose(f);
 598         p = mfree(p);
 599
 600         r = search_and_fopen_nulstr(name, "re", NULL, dirs, &f, &p);
 601         assert_se(r >= 0);
 602         assert_se(path_equal(name, p));
 603         f = safe_fclose(f);
 604         p = mfree(p);
 605
 606         r = search_and_fopen_nulstr("/a/file/which/does/not/exist/i/guess", "r", NULL, dirs, &f, &p);
 607         assert_se(r == -ENOENT);
 608         r = search_and_fopen_nulstr("afilewhichdoesnotexistiguess", "r", NULL, dirs, &f, &p);
 609         assert_se(r == -ENOENT);
 610
 611         r = unlink(name);
 612         assert_se(r == 0);
 613
 614         r = search_and_fopen_nulstr(basename(name), "r", NULL, dirs, &f, &p);
 615         assert_se(r == -ENOENT);
 616 }
 617
 618 static void test_writing_tmpfile(void) {
 619         _cleanup_(unlink_tempfilep) char name[] = "/tmp/test-systemd_writing_tmpfile.XXXXXX";
 620         _cleanup_free_ char *contents = NULL;
 621         size_t size;
 622         _cleanup_close_ int fd = -1;
 623         struct iovec iov[3];
 624         int r;
 625
 626         iov[0] = IOVEC_MAKE_STRING("abc\n");
 627         iov[1] = IOVEC_MAKE_STRING(ALPHANUMERICAL "\n");
 628         iov[2] = IOVEC_MAKE_STRING("");
 629
 630         fd = mkostemp_safe(name);
 631         printf("tmpfile: %s", name);
 632
 633         r = writev(fd, iov, 3);
 634         assert_se(r >= 0);
 635
 636         r = read_full_file(name, &contents, &size);
 637         assert_se(r == 0);
 638         printf("contents: %s", contents);
 639         assert_se(streq(contents, "abc\n" ALPHANUMERICAL "\n"));
 640 }
 641
 642 static void test_tempfn(void) {
 643         char *ret = NULL, *p;
 644
 645         assert_se(tempfn_xxxxxx("/foo/bar/waldo", NULL, &ret) >= 0);
 646         assert_se(streq_ptr(ret, "/foo/bar/.#waldoXXXXXX"));
 647         free(ret);
 648
 649         assert_se(tempfn_xxxxxx("/foo/bar/waldo", "[miau]", &ret) >= 0);
 650         assert_se(streq_ptr(ret, "/foo/bar/.#[miau]waldoXXXXXX"));
 651         free(ret);
 652
 653         assert_se(tempfn_random("/foo/bar/waldo", NULL, &ret) >= 0);
 654         assert_se(p = startswith(ret, "/foo/bar/.#waldo"));
 655         assert_se(strlen(p) == 16);
 656         assert_se(in_charset(p, "0123456789abcdef"));
 657         free(ret);
 658
 659         assert_se(tempfn_random("/foo/bar/waldo", "[wuff]", &ret) >= 0);
 660         assert_se(p = startswith(ret, "/foo/bar/.#[wuff]waldo"));
 661         assert_se(strlen(p) == 16);
 662         assert_se(in_charset(p, "0123456789abcdef"));
 663         free(ret);
 664
 665         assert_se(tempfn_random_child("/foo/bar/waldo", NULL, &ret) >= 0);
 666         assert_se(p = startswith(ret, "/foo/bar/waldo/.#"));
 667         assert_se(strlen(p) == 16);
 668         assert_se(in_charset(p, "0123456789abcdef"));
 669         free(ret);
 670
 671         assert_se(tempfn_random_child("/foo/bar/waldo", "[kikiriki]", &ret) >= 0);
 672         assert_se(p = startswith(ret, "/foo/bar/waldo/.#[kikiriki]"));
 673         assert_se(strlen(p) == 16);
 674         assert_se(in_charset(p, "0123456789abcdef"));
 675         free(ret);
 676 }
 677
 678 static const char chars[] =
 679         "Aąę„”\n루\377";
 680
 681 DISABLE_WARNING_TYPE_LIMITS;
 682
 683 static void test_fgetc(void) {
 684         _cleanup_fclose_ FILE *f = NULL;
 685         char c;
 686
 687         f = fmemopen_unlocked((void*) chars, sizeof(chars), "re");
 688         assert_se(f);
 689
 690         for (size_t i = 0; i < sizeof(chars); i++) {
 691                 assert_se(safe_fgetc(f, &c) == 1);
 692                 assert_se(c == chars[i]);
 693
 694                 if (ungetc(c, f) == EOF) {
 695                         /* EOF is -1, and hence we can't push value 255 in this way – if char is signed */
 696                         assert_se(c == (char) EOF);
 697                         assert_se(CHAR_MIN == -128); /* verify that char is signed on this platform */
 698                 } else {
 699                         assert_se(safe_fgetc(f, &c) == 1);
 700                         assert_se(c == chars[i]);
 701                 }
 702
 703                 /* But it works when we push it properly cast */
 704                 assert_se(ungetc((unsigned char) c, f) != EOF);
 705                 assert_se(safe_fgetc(f, &c) == 1);
 706                 assert_se(c == chars[i]);
 707         }
 708
 709         assert_se(safe_fgetc(f, &c) == 0);
 710 }
 711
 712 REENABLE_WARNING;
 713
 714 static const char buffer[] =
 715         "Some test data\n"
 716         "루Non-ascii chars: ąę„”\n"
 717         "terminators\r\n"
 718         "and even more\n\r"
 719         "now the same with a NUL\n\0"
 720         "and more\r\0"
 721         "and even more\r\n\0"
 722         "and yet even more\n\r\0"
 723         "With newlines, and a NUL byte\0"
 724         "\n"
 725         "an empty line\n"
 726         "an ignored line\n"
 727         "and a very long line that is supposed to be truncated, because it is so long\n";
 728
 729 static void test_read_line_one_file(FILE *f) {
 730         _cleanup_free_ char *line = NULL;
 731
 732         assert_se(read_line(f, SIZE_MAX, &line) == 15 && streq(line, "Some test data"));
 733         line = mfree(line);
 734
 735         assert_se(read_line(f, SIZE_MAX, &line) > 0 && streq(line, "루Non-ascii chars: ąę„”"));
 736         line = mfree(line);
 737
 738         assert_se(read_line(f, SIZE_MAX, &line) == 13 && streq(line, "terminators"));
 739         line = mfree(line);
 740
 741         assert_se(read_line(f, SIZE_MAX, &line) == 15 && streq(line, "and even more"));
 742         line = mfree(line);
 743
 744         assert_se(read_line(f, SIZE_MAX, &line) == 25 && streq(line, "now the same with a NUL"));
 745         line = mfree(line);
 746
 747         assert_se(read_line(f, SIZE_MAX, &line) == 10 && streq(line, "and more"));
 748         line = mfree(line);
 749
 750         assert_se(read_line(f, SIZE_MAX, &line) == 16 && streq(line, "and even more"));
 751         line = mfree(line);
 752
 753         assert_se(read_line(f, SIZE_MAX, &line) == 20 && streq(line, "and yet even more"));
 754         line = mfree(line);
 755
 756         assert_se(read_line(f, 1024, &line) == 30 && streq(line, "With newlines, and a NUL byte"));
 757         line = mfree(line);
 758
 759         assert_se(read_line(f, 1024, &line) == 1 && streq(line, ""));
 760         line = mfree(line);
 761
 762         assert_se(read_line(f, 1024, &line) == 14 && streq(line, "an empty line"));
 763         line = mfree(line);
 764
 765         assert_se(read_line(f, SIZE_MAX, NULL) == 16);
 766
 767         assert_se(read_line(f, 16, &line) == -ENOBUFS);
 768         line = mfree(line);
 769
 770         /* read_line() stopped when it hit the limit, that means when we continue reading we'll read at the first
 771          * character after the previous limit. Let's make use of that to continue our test. */
 772         assert_se(read_line(f, 1024, &line) == 62 && streq(line, "line that is supposed to be truncated, because it is so long"));
 773         line = mfree(line);
 774
 775         assert_se(read_line(f, 1024, &line) == 0 && streq(line, ""));
 776 }
 777
 778 static void test_read_line(void) {
 779         _cleanup_fclose_ FILE *f = NULL;
 780
 781         f = fmemopen_unlocked((void*) buffer, sizeof(buffer), "re");
 782         assert_se(f);
 783
 784         test_read_line_one_file(f);
 785 }
 786
 787 static void test_read_line2(void) {
 788         _cleanup_(unlink_tempfilep) char name[] = "/tmp/test-fileio.XXXXXX";
 789         int fd;
 790         _cleanup_fclose_ FILE *f = NULL;
 791
 792         fd = mkostemp_safe(name);
 793         assert_se(fd >= 0);
 794         assert_se((size_t) write(fd, buffer, sizeof(buffer)) == sizeof(buffer));
 795
 796         assert_se(lseek(fd, 0, SEEK_SET) == 0);
 797         assert_se(f = fdopen(fd, "r"));
 798
 799         test_read_line_one_file(f);
 800 }
 801
 802 static void test_read_line3(void) {
 803         _cleanup_fclose_ FILE *f = NULL;
 804         _cleanup_free_ char *line = NULL;
 805         int r;
 806
 807         f = fopen("/proc/uptime", "re");
 808         if (!f && IN_SET(errno, ENOENT, EPERM))
 809                 return;
 810         assert_se(f);
 811
 812         r = read_line(f, LINE_MAX, &line);
 813         assert_se(r >= 0);
 814         if (r == 0)
 815                 assert_se(line && isempty(line));
 816         else
 817                 assert_se((size_t) r == strlen(line) + 1);
 818         assert_se(read_line(f, LINE_MAX, NULL) == 0);
 819 }
 820
 821 static void test_read_line4(void) {
 822         static const struct {
 823                 size_t length;
 824                 const char *string;
 825         } eof_endings[] = {
 826                 /* Each of these will be followed by EOF and should generate the one same single string */
 827                 { 3, "foo" },
 828                 { 4, "foo\n" },
 829                 { 4, "foo\r" },
 830                 { 4, "foo\0" },
 831                 { 5, "foo\n\0" },
 832                 { 5, "foo\r\0" },
 833                 { 5, "foo\r\n" },
 834                 { 5, "foo\n\r" },
 835                 { 6, "foo\r\n\0" },
 836                 { 6, "foo\n\r\0" },
 837         };
 838
 839         size_t i;
 840         int r;
 841
 842         for (i = 0; i < ELEMENTSOF(eof_endings); i++) {
 843                 _cleanup_fclose_ FILE *f = NULL;
 844                 _cleanup_free_ char *s = NULL;
 845
 846                 assert_se(f = fmemopen_unlocked((void*) eof_endings[i].string, eof_endings[i].length, "r"));
 847
 848                 r = read_line(f, SIZE_MAX, &s);
 849                 assert_se((size_t) r == eof_endings[i].length);
 850                 assert_se(streq_ptr(s, "foo"));
 851
 852                 assert_se(read_line(f, SIZE_MAX, NULL) == 0); /* Ensure we hit EOF */
 853         }
 854 }
 855
 856 static void test_read_nul_string(void) {
 857         static const char test[] = "string nr. 1\0"
 858                 "string nr. 2\n\0"
 859                 "\377empty string follows\0"
 860                 "\0"
 861                 "final string\n is empty\0"
 862                 "\0";
 863
 864         _cleanup_fclose_ FILE *f = NULL;
 865         _cleanup_free_ char *s = NULL;
 866
 867         assert_se(f = fmemopen_unlocked((void*) test, sizeof(test)-1, "r"));
 868
 869         assert_se(read_nul_string(f, LONG_LINE_MAX, &s) == 13 && streq_ptr(s, "string nr. 1"));
 870         s = mfree(s);
 871
 872         assert_se(read_nul_string(f, LONG_LINE_MAX, &s) == 14 && streq_ptr(s, "string nr. 2\n"));
 873         s = mfree(s);
 874
 875         assert_se(read_nul_string(f, LONG_LINE_MAX, &s) == 22 && streq_ptr(s, "\377empty string follows"));
 876         s = mfree(s);
 877
 878         assert_se(read_nul_string(f, LONG_LINE_MAX, &s) == 1 && streq_ptr(s, ""));
 879         s = mfree(s);
 880
 881         assert_se(read_nul_string(f, LONG_LINE_MAX, &s) == 23 && streq_ptr(s, "final string\n is empty"));
 882         s = mfree(s);
 883
 884         assert_se(read_nul_string(f, LONG_LINE_MAX, &s) == 1 && streq_ptr(s, ""));
 885         s = mfree(s);
 886
 887         assert_se(read_nul_string(f, LONG_LINE_MAX, &s) == 0 && streq_ptr(s, ""));
 888 }
 889
 890 static void test_read_full_file_socket(void) {
 891         _cleanup_(rm_rf_physical_and_freep) char *z = NULL;
 892         _cleanup_close_ int listener = -1;
 893         _cleanup_free_ char *data = NULL, *clientname = NULL;
 894         union sockaddr_union sa;
 895         const char *j;
 896         size_t size;
 897         pid_t pid;
 898         int r;
 899
 900         log_info("/* %s */", __func__);
 901
 902         listener = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0);
 903         assert_se(listener >= 0);
 904
 905         assert_se(mkdtemp_malloc(NULL, &z) >= 0);
 906         j = strjoina(z, "/socket");
 907
 908         assert_se(sockaddr_un_set_path(&sa.un, j) >= 0);
 909
 910         assert_se(bind(listener, &sa.sa, SOCKADDR_UN_LEN(sa.un)) >= 0);
 911         assert_se(listen(listener, 1) >= 0);
 912
 913         /* Bind the *client* socket to some randomized name, to verify that this works correctly. */
 914         assert_se(asprintf(&clientname, "@%" PRIx64 "/test-bindname", random_u64()) >= 0);
 915
 916         r = safe_fork("(server)", FORK_DEATHSIG|FORK_LOG, &pid);
 917         assert_se(r >= 0);
 918         if (r == 0) {
 919                 union sockaddr_union peer = {};
 920                 socklen_t peerlen = sizeof(peer);
 921                 _cleanup_close_ int rfd = -1;
 922                 /* child */
 923
 924                 rfd = accept4(listener, NULL, 0, SOCK_CLOEXEC);
 925                 assert_se(rfd >= 0);
 926
 927                 assert_se(getpeername(rfd, &peer.sa, &peerlen) >= 0);
 928
 929                 assert_se(peer.un.sun_family == AF_UNIX);
 930                 assert_se(peerlen > offsetof(struct sockaddr_un, sun_path));
 931                 assert_se(peer.un.sun_path[0] == 0);
 932                 assert_se(streq(peer.un.sun_path + 1, clientname + 1));
 933
 934 #define TEST_STR "This is a test\nreally."
 935
 936                 assert_se(write(rfd, TEST_STR, strlen(TEST_STR)) == strlen(TEST_STR));
 937                 _exit(EXIT_SUCCESS);
 938         }
 939
 940         assert_se(read_full_file_full(AT_FDCWD, j, UINT64_MAX, SIZE_MAX, 0, NULL, &data, &size) == -ENXIO);
 941         assert_se(read_full_file_full(AT_FDCWD, j, UINT64_MAX, SIZE_MAX, READ_FULL_FILE_CONNECT_SOCKET, clientname, &data, &size) >= 0);
 942         assert_se(size == strlen(TEST_STR));
 943         assert_se(streq(data, TEST_STR));
 944
 945         assert_se(wait_for_terminate_and_check("(server)", pid, WAIT_LOG) >= 0);
 946 #undef TEST_STR
 947 }
 948
 949 static void test_read_full_file_offset_size(void) {
 950         _cleanup_fclose_ FILE *f = NULL;
 951         _cleanup_(unlink_and_freep) char *fn = NULL;
 952         _cleanup_free_ char *rbuf = NULL;
 953         size_t rbuf_size;
 954         uint8_t buf[4711];
 955
 956         random_bytes(buf, sizeof(buf));
 957
 958         assert_se(tempfn_random_child(NULL, NULL, &fn) >= 0);
 959         assert_se(f = fopen(fn, "we"));
 960         assert_se(fwrite(buf, 1, sizeof(buf), f) == sizeof(buf));
 961         assert_se(fflush_and_check(f) >= 0);
 962
 963         assert_se(read_full_file_full(AT_FDCWD, fn, UINT64_MAX, SIZE_MAX, 0, NULL, &rbuf, &rbuf_size) >= 0);
 964         assert_se(rbuf_size == sizeof(buf));
 965         assert_se(memcmp(buf, rbuf, rbuf_size) == 0);
 966         rbuf = mfree(rbuf);
 967
 968         assert_se(read_full_file_full(AT_FDCWD, fn, UINT64_MAX, 128, 0, NULL, &rbuf, &rbuf_size) >= 0);
 969         assert_se(rbuf_size == 128);
 970         assert_se(memcmp(buf, rbuf, rbuf_size) == 0);
 971         rbuf = mfree(rbuf);
 972
 973         assert_se(read_full_file_full(AT_FDCWD, fn, 1234, SIZE_MAX, 0, NULL, &rbuf, &rbuf_size) >= 0);
 974         assert_se(rbuf_size == sizeof(buf) - 1234);
 975         assert_se(memcmp(buf + 1234, rbuf, rbuf_size) == 0);
 976         rbuf = mfree(rbuf);
 977
 978         assert_se(read_full_file_full(AT_FDCWD, fn, 2345, 777, 0, NULL, &rbuf, &rbuf_size) >= 0);
 979         assert_se(rbuf_size == 777);
 980         assert_se(memcmp(buf + 2345, rbuf, rbuf_size) == 0);
 981         rbuf = mfree(rbuf);
 982
 983         assert_se(read_full_file_full(AT_FDCWD, fn, 4700, 20, 0, NULL, &rbuf, &rbuf_size) >= 0);
 984         assert_se(rbuf_size == 11);
 985         assert_se(memcmp(buf + 4700, rbuf, rbuf_size) == 0);
 986         rbuf = mfree(rbuf);
 987
 988         assert_se(read_full_file_full(AT_FDCWD, fn, 10000, 99, 0, NULL, &rbuf, &rbuf_size) >= 0);
 989         assert_se(rbuf_size == 0);
 990         rbuf = mfree(rbuf);
 991 }
 992
 993 static void test_read_full_virtual_file(void) {
 994         const char *filename;
 995         int r;
 996
 997         FOREACH_STRING(filename,
 998                        "/proc/1/cmdline",
 999                        "/etc/nsswitch.conf",
1000                        "/sys/kernel/uevent_seqnum") {
1001
1002                 _cleanup_free_ char *buf = NULL;
1003                 size_t size = 0;
1004
1005                 r = read_full_virtual_file(filename, &buf, &size);
1006                 log_info_errno(r, "read_full_virtual_file(\"%s\"): %m (%zu bytes)", filename, size);
1007                 assert_se(r == 0 || ERRNO_IS_PRIVILEGE(r) || r == -ENOENT);
1008         }
1009 }
1010
1011 int main(int argc, char *argv[]) {
1012         test_setup_logging(LOG_DEBUG);
1013
1014         test_parse_env_file();
1015         test_parse_multiline_env_file();
1016         test_merge_env_file();
1017         test_merge_env_file_invalid();
1018         test_executable_is_script();
1019         test_status_field();
1020         test_capeff();
1021         test_write_string_stream();
1022         test_write_string_file();
1023         test_write_string_file_no_create();
1024         test_write_string_file_verify();
1025         test_load_env_file_pairs();
1026         test_search_and_fopen();
1027         test_search_and_fopen_nulstr();
1028         test_writing_tmpfile();
1029         test_tempfn();
1030         test_fgetc();
1031         test_read_line();
1032         test_read_line2();
1033         test_read_line3();
1034         test_read_line4();
1035         test_read_nul_string();
1036         test_read_full_file_socket();
1037         test_read_full_file_offset_size();
1038         test_read_full_virtual_file();
1039
1040         return 0;
1041 }