src/test/test-fileio.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   Copyright 2013 Lennart Poettering
   4 ***/
   5
   6 #include <fcntl.h>
   7 #include <stdio.h>
   8 #include <unistd.h>
   9
  10 #include "alloc-util.h"
  11 #include "ctype.h"
  12 #include "def.h"
  13 #include "env-util.h"
  14 #include "fd-util.h"
  15 #include "fileio.h"
  16 #include "fs-util.h"
  17 #include "io-util.h"
  18 #include "parse-util.h"
  19 #include "process-util.h"
  20 #include "string-util.h"
  21 #include "strv.h"
  22 #include "util.h"
  23
  24 static void test_parse_env_file(void) {
  25         _cleanup_(unlink_tempfilep) char
  26                 t[] = "/tmp/test-fileio-in-XXXXXX",
  27                 p[] = "/tmp/test-fileio-out-XXXXXX";
  28         int fd, r;
  29         FILE *f;
  30         _cleanup_free_ char *one = NULL, *two = NULL, *three = NULL, *four = NULL, *five = NULL,
  31                         *six = NULL, *seven = NULL, *eight = NULL, *nine = NULL, *ten = NULL;
  32         _cleanup_strv_free_ char **a = NULL, **b = NULL;
  33         char **i;
  34         unsigned k;
  35
  36         fd = mkostemp_safe(p);
  37         assert_se(fd >= 0);
  38         close(fd);
  39
  40         fd = mkostemp_safe(t);
  41         assert_se(fd >= 0);
  42
  43         f = fdopen(fd, "w");
  44         assert_se(f);
  45
  46         fputs("one=BAR   \n"
  47               "# comment\n"
  48               " # comment \n"
  49               " ; comment \n"
  50               "  two   =   bar    \n"
  51               "invalid line\n"
  52               "invalid line #comment\n"
  53               "three = \"333\n"
  54               "xxxx\"\n"
  55               "four = \'44\\\"44\'\n"
  56               "five = \'55\\\'55\' \"FIVE\" cinco   \n"
  57               "six = seis sechs\\\n"
  58               " sis\n"
  59               "seven=\"sevenval\" #nocomment\n"
  60               "eight=eightval #nocomment\n"
  61               "export nine=nineval\n"
  62               "ten=ignored\n"
  63               "ten=ignored\n"
  64               "ten=", f);
  65
  66         fflush(f);
  67         fclose(f);
  68
  69         r = load_env_file(NULL, t, NULL, &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(a[10] == NULL);
  86
  87         strv_env_clean(a);
  88
  89         k = 0;
  90         STRV_FOREACH(i, b) {
  91                 log_info("Got2: <%s>", *i);
  92                 assert_se(streq(*i, a[k++]));
  93         }
  94
  95         r = parse_env_file(
  96                         NULL, t, NULL,
  97                        "one", &one,
  98                        "two", &two,
  99                        "three", &three,
 100                        "four", &four,
 101                        "five", &five,
 102                        "six", &six,
 103                        "seven", &seven,
 104                        "eight", &eight,
 105                        "export nine", &nine,
 106                        "ten", &ten,
 107                        NULL);
 108
 109         assert_se(r >= 0);
 110
 111         log_info("one=[%s]", strna(one));
 112         log_info("two=[%s]", strna(two));
 113         log_info("three=[%s]", strna(three));
 114         log_info("four=[%s]", strna(four));
 115         log_info("five=[%s]", strna(five));
 116         log_info("six=[%s]", strna(six));
 117         log_info("seven=[%s]", strna(seven));
 118         log_info("eight=[%s]", strna(eight));
 119         log_info("export nine=[%s]", strna(nine));
 120         log_info("ten=[%s]", strna(nine));
 121
 122         assert_se(streq(one, "BAR"));
 123         assert_se(streq(two, "bar"));
 124         assert_se(streq(three, "333\nxxxx"));
 125         assert_se(streq(four, "44\"44"));
 126         assert_se(streq(five, "55\'55FIVEcinco"));
 127         assert_se(streq(six, "seis sechs sis"));
 128         assert_se(streq(seven, "sevenval#nocomment"));
 129         assert_se(streq(eight, "eightval #nocomment"));
 130         assert_se(streq(nine, "nineval"));
 131         assert_se(ten == NULL);
 132
 133         r = write_env_file(p, a);
 134         assert_se(r >= 0);
 135
 136         r = load_env_file(NULL, p, NULL, &b);
 137         assert_se(r >= 0);
 138 }
 139
 140 static void test_parse_multiline_env_file(void) {
 141         _cleanup_(unlink_tempfilep) char
 142                 t[] = "/tmp/test-fileio-in-XXXXXX",
 143                 p[] = "/tmp/test-fileio-out-XXXXXX";
 144         int fd, r;
 145         FILE *f;
 146         _cleanup_strv_free_ char **a = NULL, **b = NULL;
 147         char **i;
 148
 149         fd = mkostemp_safe(p);
 150         assert_se(fd >= 0);
 151         close(fd);
 152
 153         fd = mkostemp_safe(t);
 154         assert_se(fd >= 0);
 155
 156         f = fdopen(fd, "w");
 157         assert_se(f);
 158
 159         fputs("one=BAR\\\n"
 160               "    VAR\\\n"
 161               "\tGAR\n"
 162               "#comment\n"
 163               "two=\"bar\\\n"
 164               "    var\\\n"
 165               "\tgar\"\n"
 166               "#comment\n"
 167               "tri=\"bar \\\n"
 168               "    var \\\n"
 169               "\tgar \"\n", f);
 170
 171         fflush(f);
 172         fclose(f);
 173
 174         r = load_env_file(NULL, t, NULL, &a);
 175         assert_se(r >= 0);
 176
 177         STRV_FOREACH(i, a)
 178                 log_info("Got: <%s>", *i);
 179
 180         assert_se(streq_ptr(a[0], "one=BAR    VAR\tGAR"));
 181         assert_se(streq_ptr(a[1], "two=bar    var\tgar"));
 182         assert_se(streq_ptr(a[2], "tri=bar     var \tgar "));
 183         assert_se(a[3] == NULL);
 184
 185         r = write_env_file(p, a);
 186         assert_se(r >= 0);
 187
 188         r = load_env_file(NULL, p, NULL, &b);
 189         assert_se(r >= 0);
 190 }
 191
 192 static void test_merge_env_file(void) {
 193         _cleanup_(unlink_tempfilep) char t[] = "/tmp/test-fileio-XXXXXX";
 194         int fd, r;
 195         _cleanup_fclose_ FILE *f = NULL;
 196         _cleanup_strv_free_ char **a = NULL;
 197         char **i;
 198
 199         fd = mkostemp_safe(t);
 200         assert_se(fd >= 0);
 201
 202         log_info("/* %s (%s) */", __func__, t);
 203
 204         f = fdopen(fd, "w");
 205         assert_se(f);
 206
 207         r = write_string_stream(f,
 208                                 "one=1   \n"
 209                                 "twelve=${one}2\n"
 210                                 "twentyone=2${one}\n"
 211                                 "one=2\n"
 212                                 "twentytwo=2${one}\n"
 213                                 "xxx_minus_three=$xxx - 3\n"
 214                                 "xxx=0x$one$one$one\n"
 215                                 "yyy=${one:-fallback}\n"
 216                                 "zzz=${one:+replacement}\n"
 217                                 "zzzz=${foobar:-${nothing}}\n"
 218                                 "zzzzz=${nothing:+${nothing}}\n"
 219                                 , WRITE_STRING_FILE_AVOID_NEWLINE);
 220         assert(r >= 0);
 221
 222         r = merge_env_file(&a, NULL, t);
 223         assert_se(r >= 0);
 224         strv_sort(a);
 225
 226         STRV_FOREACH(i, a)
 227                 log_info("Got: <%s>", *i);
 228
 229         assert_se(streq(a[0], "one=2"));
 230         assert_se(streq(a[1], "twelve=12"));
 231         assert_se(streq(a[2], "twentyone=21"));
 232         assert_se(streq(a[3], "twentytwo=22"));
 233         assert_se(streq(a[4], "xxx=0x222"));
 234         assert_se(streq(a[5], "xxx_minus_three= - 3"));
 235         assert_se(streq(a[6], "yyy=2"));
 236         assert_se(streq(a[7], "zzz=replacement"));
 237         assert_se(streq(a[8], "zzzz="));
 238         assert_se(streq(a[9], "zzzzz="));
 239         assert_se(a[10] == NULL);
 240
 241         r = merge_env_file(&a, NULL, t);
 242         assert_se(r >= 0);
 243         strv_sort(a);
 244
 245         STRV_FOREACH(i, a)
 246                 log_info("Got2: <%s>", *i);
 247
 248         assert_se(streq(a[0], "one=2"));
 249         assert_se(streq(a[1], "twelve=12"));
 250         assert_se(streq(a[2], "twentyone=21"));
 251         assert_se(streq(a[3], "twentytwo=22"));
 252         assert_se(streq(a[4], "xxx=0x222"));
 253         assert_se(streq(a[5], "xxx_minus_three=0x222 - 3"));
 254         assert_se(streq(a[6], "yyy=2"));
 255         assert_se(streq(a[7], "zzz=replacement"));
 256         assert_se(streq(a[8], "zzzz="));
 257         assert_se(streq(a[9], "zzzzz="));
 258         assert_se(a[10] == NULL);
 259 }
 260
 261 static void test_merge_env_file_invalid(void) {
 262         _cleanup_(unlink_tempfilep) char t[] = "/tmp/test-fileio-XXXXXX";
 263         int fd, r;
 264         _cleanup_fclose_ FILE *f = NULL;
 265         _cleanup_strv_free_ char **a = NULL;
 266         char **i;
 267
 268         fd = mkostemp_safe(t);
 269         assert_se(fd >= 0);
 270
 271         log_info("/* %s (%s) */", __func__, t);
 272
 273         f = fdopen(fd, "w");
 274         assert_se(f);
 275
 276         r = write_string_stream(f,
 277                                 "unset one   \n"
 278                                 "unset one=   \n"
 279                                 "unset one=1   \n"
 280                                 "one   \n"
 281                                 "one =  \n"
 282                                 "one two =\n"
 283                                 "\x20two=\n"
 284                                 "#comment=comment\n"
 285                                 ";comment2=comment2\n"
 286                                 "#\n"
 287                                 "\n\n"                  /* empty line */
 288                                 , WRITE_STRING_FILE_AVOID_NEWLINE);
 289         assert(r >= 0);
 290
 291         r = merge_env_file(&a, NULL, t);
 292         assert_se(r >= 0);
 293
 294         STRV_FOREACH(i, a)
 295                 log_info("Got: <%s>", *i);
 296
 297         assert_se(strv_isempty(a));
 298 }
 299
 300 static void test_executable_is_script(void) {
 301         _cleanup_(unlink_tempfilep) char t[] = "/tmp/test-fileio-XXXXXX";
 302         int fd, r;
 303         _cleanup_fclose_ FILE *f = NULL;
 304         char *command;
 305
 306         fd = mkostemp_safe(t);
 307         assert_se(fd >= 0);
 308
 309         f = fdopen(fd, "w");
 310         assert_se(f);
 311
 312         fputs("#! /bin/script -a -b \ngoo goo", f);
 313         fflush(f);
 314
 315         r = executable_is_script(t, &command);
 316         assert_se(r > 0);
 317         assert_se(streq(command, "/bin/script"));
 318         free(command);
 319
 320         r = executable_is_script("/bin/sh", &command);
 321         assert_se(r == 0);
 322
 323         r = executable_is_script("/usr/bin/yum", &command);
 324         assert_se(r > 0 || r == -ENOENT);
 325         if (r > 0) {
 326                 assert_se(startswith(command, "/"));
 327                 free(command);
 328         }
 329 }
 330
 331 static void test_status_field(void) {
 332         _cleanup_free_ char *t = NULL, *p = NULL, *s = NULL, *z = NULL;
 333         unsigned long long total = 0, buffers = 0;
 334         int r;
 335
 336         assert_se(get_proc_field("/proc/self/status", "Threads", WHITESPACE, &t) == 0);
 337         puts(t);
 338         assert_se(streq(t, "1"));
 339
 340         r = get_proc_field("/proc/meminfo", "MemTotal", WHITESPACE, &p);
 341         if (r != -ENOENT) {
 342                 assert_se(r == 0);
 343                 puts(p);
 344                 assert_se(safe_atollu(p, &total) == 0);
 345         }
 346
 347         r = get_proc_field("/proc/meminfo", "Buffers", WHITESPACE, &s);
 348         if (r != -ENOENT) {
 349                 assert_se(r == 0);
 350                 puts(s);
 351                 assert_se(safe_atollu(s, &buffers) == 0);
 352         }
 353
 354         if (p)
 355                 assert_se(buffers < total);
 356
 357         /* Seccomp should be a good test for field full of zeros. */
 358         r = get_proc_field("/proc/meminfo", "Seccomp", WHITESPACE, &z);
 359         if (r != -ENOENT) {
 360                 assert_se(r == 0);
 361                 puts(z);
 362                 assert_se(safe_atollu(z, &buffers) == 0);
 363         }
 364 }
 365
 366 static void test_capeff(void) {
 367         int pid, p;
 368
 369         for (pid = 0; pid < 2; pid++) {
 370                 _cleanup_free_ char *capeff = NULL;
 371                 int r;
 372
 373                 r = get_process_capeff(0, &capeff);
 374                 log_info("capeff: '%s' (r=%d)", capeff, r);
 375
 376                 if (IN_SET(r, -ENOENT, -EPERM))
 377                         return;
 378
 379                 assert_se(r == 0);
 380                 assert_se(*capeff);
 381                 p = capeff[strspn(capeff, HEXDIGITS)];
 382                 assert_se(!p || isspace(p));
 383         }
 384 }
 385
 386 static void test_write_string_stream(void) {
 387         _cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-write_string_stream-XXXXXX";
 388         _cleanup_fclose_ FILE *f = NULL;
 389         int fd;
 390         char buf[64];
 391
 392         fd = mkostemp_safe(fn);
 393         assert_se(fd >= 0);
 394
 395         f = fdopen(fd, "r");
 396         assert_se(f);
 397         assert_se(write_string_stream(f, "boohoo", 0) < 0);
 398         f = safe_fclose(f);
 399
 400         f = fopen(fn, "r+");
 401         assert_se(f);
 402
 403         assert_se(write_string_stream(f, "boohoo", 0) == 0);
 404         rewind(f);
 405
 406         assert_se(fgets(buf, sizeof(buf), f));
 407         assert_se(streq(buf, "boohoo\n"));
 408         f = safe_fclose(f);
 409
 410         f = fopen(fn, "w+");
 411         assert_se(f);
 412
 413         assert_se(write_string_stream(f, "boohoo", WRITE_STRING_FILE_AVOID_NEWLINE) == 0);
 414         rewind(f);
 415
 416         assert_se(fgets(buf, sizeof(buf), f));
 417         printf(">%s<", buf);
 418         assert_se(streq(buf, "boohoo"));
 419 }
 420
 421 static void test_write_string_file(void) {
 422         _cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-write_string_file-XXXXXX";
 423         char buf[64] = {};
 424         _cleanup_close_ int fd;
 425
 426         fd = mkostemp_safe(fn);
 427         assert_se(fd >= 0);
 428
 429         assert_se(write_string_file(fn, "boohoo", WRITE_STRING_FILE_CREATE) == 0);
 430
 431         assert_se(read(fd, buf, sizeof(buf)) == 7);
 432         assert_se(streq(buf, "boohoo\n"));
 433 }
 434
 435 static void test_write_string_file_no_create(void) {
 436         _cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-write_string_file_no_create-XXXXXX";
 437         _cleanup_close_ int fd;
 438         char buf[64] = {0};
 439
 440         fd = mkostemp_safe(fn);
 441         assert_se(fd >= 0);
 442
 443         assert_se(write_string_file("/a/file/which/does/not/exists/i/guess", "boohoo", 0) < 0);
 444         assert_se(write_string_file(fn, "boohoo", 0) == 0);
 445
 446         assert_se(read(fd, buf, sizeof(buf)) == STRLEN("boohoo\n"));
 447         assert_se(streq(buf, "boohoo\n"));
 448 }
 449
 450 static void test_write_string_file_verify(void) {
 451         _cleanup_free_ char *buf = NULL, *buf2 = NULL;
 452         int r;
 453
 454         assert_se(read_one_line_file("/proc/cmdline", &buf) >= 0);
 455         assert_se(buf2 = strjoin(buf, "\n"));
 456
 457         r = write_string_file("/proc/cmdline", buf, 0);
 458         assert_se(IN_SET(r, -EACCES, -EIO));
 459         r = write_string_file("/proc/cmdline", buf2, 0);
 460         assert_se(IN_SET(r, -EACCES, -EIO));
 461
 462         assert_se(write_string_file("/proc/cmdline", buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE) == 0);
 463         assert_se(write_string_file("/proc/cmdline", buf2, WRITE_STRING_FILE_VERIFY_ON_FAILURE) == 0);
 464
 465         r = write_string_file("/proc/cmdline", buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE|WRITE_STRING_FILE_AVOID_NEWLINE);
 466         assert_se(IN_SET(r, -EACCES, -EIO));
 467         assert_se(write_string_file("/proc/cmdline", buf2, WRITE_STRING_FILE_VERIFY_ON_FAILURE|WRITE_STRING_FILE_AVOID_NEWLINE) == 0);
 468 }
 469
 470 static void test_load_env_file_pairs(void) {
 471         _cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-load_env_file_pairs-XXXXXX";
 472         int fd, r;
 473         _cleanup_fclose_ FILE *f = NULL;
 474         _cleanup_strv_free_ char **l = NULL;
 475         char **k, **v;
 476
 477         fd = mkostemp_safe(fn);
 478         assert_se(fd >= 0);
 479
 480         r = write_string_file(fn,
 481                         "NAME=\"Arch Linux\"\n"
 482                         "ID=arch\n"
 483                         "PRETTY_NAME=\"Arch Linux\"\n"
 484                         "ANSI_COLOR=\"0;36\"\n"
 485                         "HOME_URL=\"https://www.archlinux.org/\"\n"
 486                         "SUPPORT_URL=\"https://bbs.archlinux.org/\"\n"
 487                         "BUG_REPORT_URL=\"https://bugs.archlinux.org/\"\n",
 488                         WRITE_STRING_FILE_CREATE);
 489         assert_se(r == 0);
 490
 491         f = fdopen(fd, "r");
 492         assert_se(f);
 493
 494         r = load_env_file_pairs(f, fn, NULL, &l);
 495         assert_se(r >= 0);
 496
 497         assert_se(strv_length(l) == 14);
 498         STRV_FOREACH_PAIR(k, v, l) {
 499                 assert_se(STR_IN_SET(*k, "NAME", "ID", "PRETTY_NAME", "ANSI_COLOR", "HOME_URL", "SUPPORT_URL", "BUG_REPORT_URL"));
 500                 printf("%s=%s\n", *k, *v);
 501                 if (streq(*k, "NAME")) assert_se(streq(*v, "Arch Linux"));
 502                 if (streq(*k, "ID")) assert_se(streq(*v, "arch"));
 503                 if (streq(*k, "PRETTY_NAME")) assert_se(streq(*v, "Arch Linux"));
 504                 if (streq(*k, "ANSI_COLOR")) assert_se(streq(*v, "0;36"));
 505                 if (streq(*k, "HOME_URL")) assert_se(streq(*v, "https://www.archlinux.org/"));
 506                 if (streq(*k, "SUPPORT_URL")) assert_se(streq(*v, "https://bbs.archlinux.org/"));
 507                 if (streq(*k, "BUG_REPORT_URL")) assert_se(streq(*v, "https://bugs.archlinux.org/"));
 508         }
 509 }
 510
 511 static void test_search_and_fopen(void) {
 512         const char *dirs[] = {"/tmp/foo/bar", "/tmp", NULL};
 513
 514         char name[] = "/tmp/test-search_and_fopen.XXXXXX";
 515         int fd, r;
 516         FILE *f;
 517
 518         fd = mkostemp_safe(name);
 519         assert_se(fd >= 0);
 520         close(fd);
 521
 522         r = search_and_fopen(basename(name), "r", NULL, dirs, &f);
 523         assert_se(r >= 0);
 524         fclose(f);
 525
 526         r = search_and_fopen(name, "r", NULL, dirs, &f);
 527         assert_se(r >= 0);
 528         fclose(f);
 529
 530         r = search_and_fopen(basename(name), "r", "/", dirs, &f);
 531         assert_se(r >= 0);
 532         fclose(f);
 533
 534         r = search_and_fopen("/a/file/which/does/not/exist/i/guess", "r", NULL, dirs, &f);
 535         assert_se(r < 0);
 536         r = search_and_fopen("afilewhichdoesnotexistiguess", "r", NULL, dirs, &f);
 537         assert_se(r < 0);
 538
 539         r = unlink(name);
 540         assert_se(r == 0);
 541
 542         r = search_and_fopen(basename(name), "r", NULL, dirs, &f);
 543         assert_se(r < 0);
 544 }
 545
 546 static void test_search_and_fopen_nulstr(void) {
 547         const char dirs[] = "/tmp/foo/bar\0/tmp\0";
 548
 549         _cleanup_(unlink_tempfilep) char name[] = "/tmp/test-search_and_fopen.XXXXXX";
 550         int fd, r;
 551         FILE *f;
 552
 553         fd = mkostemp_safe(name);
 554         assert_se(fd >= 0);
 555         close(fd);
 556
 557         r = search_and_fopen_nulstr(basename(name), "r", NULL, dirs, &f);
 558         assert_se(r >= 0);
 559         fclose(f);
 560
 561         r = search_and_fopen_nulstr(name, "r", NULL, dirs, &f);
 562         assert_se(r >= 0);
 563         fclose(f);
 564
 565         r = search_and_fopen_nulstr("/a/file/which/does/not/exist/i/guess", "r", NULL, dirs, &f);
 566         assert_se(r < 0);
 567         r = search_and_fopen_nulstr("afilewhichdoesnotexistiguess", "r", NULL, dirs, &f);
 568         assert_se(r < 0);
 569
 570         r = unlink(name);
 571         assert_se(r == 0);
 572
 573         r = search_and_fopen_nulstr(basename(name), "r", NULL, dirs, &f);
 574         assert_se(r < 0);
 575 }
 576
 577 static void test_writing_tmpfile(void) {
 578         _cleanup_(unlink_tempfilep) char name[] = "/tmp/test-systemd_writing_tmpfile.XXXXXX";
 579         _cleanup_free_ char *contents = NULL;
 580         size_t size;
 581         _cleanup_close_ int fd = -1;
 582         struct iovec iov[3];
 583         int r;
 584
 585         iov[0] = IOVEC_MAKE_STRING("abc\n");
 586         iov[1] = IOVEC_MAKE_STRING(ALPHANUMERICAL "\n");
 587         iov[2] = IOVEC_MAKE_STRING("");
 588
 589         fd = mkostemp_safe(name);
 590         printf("tmpfile: %s", name);
 591
 592         r = writev(fd, iov, 3);
 593         assert_se(r >= 0);
 594
 595         r = read_full_file(name, &contents, &size);
 596         assert_se(r == 0);
 597         printf("contents: %s", contents);
 598         assert_se(streq(contents, "abc\n" ALPHANUMERICAL "\n"));
 599 }
 600
 601 static void test_tempfn(void) {
 602         char *ret = NULL, *p;
 603
 604         assert_se(tempfn_xxxxxx("/foo/bar/waldo", NULL, &ret) >= 0);
 605         assert_se(streq_ptr(ret, "/foo/bar/.#waldoXXXXXX"));
 606         free(ret);
 607
 608         assert_se(tempfn_xxxxxx("/foo/bar/waldo", "[miau]", &ret) >= 0);
 609         assert_se(streq_ptr(ret, "/foo/bar/.#[miau]waldoXXXXXX"));
 610         free(ret);
 611
 612         assert_se(tempfn_random("/foo/bar/waldo", NULL, &ret) >= 0);
 613         assert_se(p = startswith(ret, "/foo/bar/.#waldo"));
 614         assert_se(strlen(p) == 16);
 615         assert_se(in_charset(p, "0123456789abcdef"));
 616         free(ret);
 617
 618         assert_se(tempfn_random("/foo/bar/waldo", "[wuff]", &ret) >= 0);
 619         assert_se(p = startswith(ret, "/foo/bar/.#[wuff]waldo"));
 620         assert_se(strlen(p) == 16);
 621         assert_se(in_charset(p, "0123456789abcdef"));
 622         free(ret);
 623
 624         assert_se(tempfn_random_child("/foo/bar/waldo", NULL, &ret) >= 0);
 625         assert_se(p = startswith(ret, "/foo/bar/waldo/.#"));
 626         assert_se(strlen(p) == 16);
 627         assert_se(in_charset(p, "0123456789abcdef"));
 628         free(ret);
 629
 630         assert_se(tempfn_random_child("/foo/bar/waldo", "[kikiriki]", &ret) >= 0);
 631         assert_se(p = startswith(ret, "/foo/bar/waldo/.#[kikiriki]"));
 632         assert_se(strlen(p) == 16);
 633         assert_se(in_charset(p, "0123456789abcdef"));
 634         free(ret);
 635 }
 636
 637 static const char buffer[] =
 638         "Some test data\n"
 639         "With newlines, and a NUL byte\0"
 640         "\n"
 641         "an empty line\n"
 642         "an ignored line\n"
 643         "and a very long line that is supposed to be truncated, because it is so long\n";
 644
 645 static void test_read_line_one_file(FILE *f) {
 646         _cleanup_free_ char *line = NULL;
 647
 648         assert_se(read_line(f, (size_t) -1, &line) == 15 && streq(line, "Some test data"));
 649         line = mfree(line);
 650
 651         assert_se(read_line(f, 1024, &line) == 30 && streq(line, "With newlines, and a NUL byte"));
 652         line = mfree(line);
 653
 654         assert_se(read_line(f, 1024, &line) == 1 && streq(line, ""));
 655         line = mfree(line);
 656
 657         assert_se(read_line(f, 1024, &line) == 14 && streq(line, "an empty line"));
 658         line = mfree(line);
 659
 660         assert_se(read_line(f, (size_t) -1, NULL) == 16);
 661
 662         assert_se(read_line(f, 16, &line) == -ENOBUFS);
 663         line = mfree(line);
 664
 665         /* read_line() stopped when it hit the limit, that means when we continue reading we'll read at the first
 666          * character after the previous limit. Let's make use of tha to continue our test. */
 667         assert_se(read_line(f, 1024, &line) == 61 && streq(line, "line that is supposed to be truncated, because it is so long"));
 668         line = mfree(line);
 669
 670         assert_se(read_line(f, 1024, &line) == 1 && streq(line, ""));
 671         line = mfree(line);
 672
 673         assert_se(read_line(f, 1024, &line) == 0 && streq(line, ""));
 674 }
 675
 676 static void test_read_line(void) {
 677         _cleanup_fclose_ FILE *f = NULL;
 678
 679         f = fmemopen((void*) buffer, sizeof(buffer), "re");
 680         assert_se(f);
 681
 682         test_read_line_one_file(f);
 683 }
 684
 685 static void test_read_line2(void) {
 686         _cleanup_(unlink_tempfilep) char name[] = "/tmp/test-fileio.XXXXXX";
 687         int fd;
 688         _cleanup_fclose_ FILE *f = NULL;
 689
 690         fd = mkostemp_safe(name);
 691         assert_se(fd >= 0);
 692         assert_se((size_t) write(fd, buffer, sizeof(buffer)) == sizeof(buffer));
 693
 694         assert_se(lseek(fd, 0, SEEK_SET) == 0);
 695         assert_se(f = fdopen(fd, "r"));
 696
 697         test_read_line_one_file(f);
 698 }
 699
 700 static void test_read_line3(void) {
 701         _cleanup_fclose_ FILE *f = NULL;
 702         _cleanup_free_ char *line = NULL;
 703         int r;
 704
 705         f = fopen("/proc/cmdline", "re");
 706         if (!f && IN_SET(errno, ENOENT, EPERM))
 707                 return;
 708         assert_se(f);
 709
 710         r = read_line(f, LINE_MAX, &line);
 711         assert_se((size_t) r == strlen(line) + 1);
 712         assert_se(read_line(f, LINE_MAX, NULL) == 0);
 713 }
 714
 715 int main(int argc, char *argv[]) {
 716         log_set_max_level(LOG_DEBUG);
 717         log_parse_environment();
 718         log_open();
 719
 720         test_parse_env_file();
 721         test_parse_multiline_env_file();
 722         test_merge_env_file();
 723         test_merge_env_file_invalid();
 724         test_executable_is_script();
 725         test_status_field();
 726         test_capeff();
 727         test_write_string_stream();
 728         test_write_string_file();
 729         test_write_string_file_no_create();
 730         test_write_string_file_verify();
 731         test_load_env_file_pairs();
 732         test_search_and_fopen();
 733         test_search_and_fopen_nulstr();
 734         test_writing_tmpfile();
 735         test_tempfn();
 736         test_read_line();
 737         test_read_line2();
 738         test_read_line3();
 739
 740         return 0;
 741 }