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Systemd/src/test/test-fileio.c

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/* SPDX-License-Identifier: LGPL-2.1+ */
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include "alloc-util.h"
#include "ctype.h"
#include "def.h"
#include "env-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "fs-util.h"
#include "io-util.h"
#include "parse-util.h"
#include "process-util.h"
#include "string-util.h"
#include "strv.h"
#include "tests.h"
#include "util.h"
static void test_parse_env_file(void) {
_cleanup_(unlink_tempfilep) char
t[] = "/tmp/test-fileio-in-XXXXXX",
p[] = "/tmp/test-fileio-out-XXXXXX";
int fd, r;
FILE *f;
_cleanup_free_ char *one = NULL, *two = NULL, *three = NULL, *four = NULL, *five = NULL,
*six = NULL, *seven = NULL, *eight = NULL, *nine = NULL, *ten = NULL;
_cleanup_strv_free_ char **a = NULL, **b = NULL;
char **i;
unsigned k;
fd = mkostemp_safe(p);
assert_se(fd >= 0);
close(fd);
fd = mkostemp_safe(t);
assert_se(fd >= 0);
f = fdopen(fd, "w");
assert_se(f);
fputs("one=BAR \n"
"# comment\n"
" # comment \n"
" ; comment \n"
" two = bar \n"
"invalid line\n"
"invalid line #comment\n"
"three = \"333\n"
"xxxx\"\n"
"four = \'44\\\"44\'\n"
"five = \'55\\\'55\' \"FIVE\" cinco \n"
"six = seis sechs\\\n"
" sis\n"
"seven=\"sevenval\" #nocomment\n"
"eight=eightval #nocomment\n"
"export nine=nineval\n"
"ten=ignored\n"
"ten=ignored\n"
"ten=", f);
fflush(f);
fclose(f);
r = load_env_file(NULL, t, NULL, &a);
assert_se(r >= 0);
STRV_FOREACH(i, a)
log_info("Got: <%s>", *i);
assert_se(streq_ptr(a[0], "one=BAR"));
assert_se(streq_ptr(a[1], "two=bar"));
assert_se(streq_ptr(a[2], "three=333\nxxxx"));
assert_se(streq_ptr(a[3], "four=44\"44"));
assert_se(streq_ptr(a[4], "five=55\'55FIVEcinco"));
assert_se(streq_ptr(a[5], "six=seis sechs sis"));
assert_se(streq_ptr(a[6], "seven=sevenval#nocomment"));
assert_se(streq_ptr(a[7], "eight=eightval #nocomment"));
assert_se(streq_ptr(a[8], "export nine=nineval"));
assert_se(streq_ptr(a[9], "ten="));
assert_se(a[10] == NULL);
strv_env_clean(a);
k = 0;
STRV_FOREACH(i, b) {
log_info("Got2: <%s>", *i);
assert_se(streq(*i, a[k++]));
}
r = parse_env_file(
NULL, t, NULL,
"one", &one,
"two", &two,
"three", &three,
"four", &four,
"five", &five,
"six", &six,
"seven", &seven,
"eight", &eight,
"export nine", &nine,
"ten", &ten,
NULL);
assert_se(r >= 0);
log_info("one=[%s]", strna(one));
log_info("two=[%s]", strna(two));
log_info("three=[%s]", strna(three));
log_info("four=[%s]", strna(four));
log_info("five=[%s]", strna(five));
log_info("six=[%s]", strna(six));
log_info("seven=[%s]", strna(seven));
log_info("eight=[%s]", strna(eight));
log_info("export nine=[%s]", strna(nine));
log_info("ten=[%s]", strna(nine));
assert_se(streq(one, "BAR"));
assert_se(streq(two, "bar"));
assert_se(streq(three, "333\nxxxx"));
assert_se(streq(four, "44\"44"));
assert_se(streq(five, "55\'55FIVEcinco"));
assert_se(streq(six, "seis sechs sis"));
assert_se(streq(seven, "sevenval#nocomment"));
assert_se(streq(eight, "eightval #nocomment"));
assert_se(streq(nine, "nineval"));
assert_se(ten == NULL);
r = write_env_file(p, a);
assert_se(r >= 0);
r = load_env_file(NULL, p, NULL, &b);
assert_se(r >= 0);
}
static void test_parse_multiline_env_file(void) {
_cleanup_(unlink_tempfilep) char
t[] = "/tmp/test-fileio-in-XXXXXX",
p[] = "/tmp/test-fileio-out-XXXXXX";
int fd, r;
FILE *f;
_cleanup_strv_free_ char **a = NULL, **b = NULL;
char **i;
fd = mkostemp_safe(p);
assert_se(fd >= 0);
close(fd);
fd = mkostemp_safe(t);
assert_se(fd >= 0);
f = fdopen(fd, "w");
assert_se(f);
fputs("one=BAR\\\n"
" VAR\\\n"
"\tGAR\n"
"#comment\n"
"two=\"bar\\\n"
" var\\\n"
"\tgar\"\n"
"#comment\n"
"tri=\"bar \\\n"
" var \\\n"
"\tgar \"\n", f);
fflush(f);
fclose(f);
r = load_env_file(NULL, t, NULL, &a);
assert_se(r >= 0);
STRV_FOREACH(i, a)
log_info("Got: <%s>", *i);
assert_se(streq_ptr(a[0], "one=BAR VAR\tGAR"));
assert_se(streq_ptr(a[1], "two=bar var\tgar"));
assert_se(streq_ptr(a[2], "tri=bar var \tgar "));
assert_se(a[3] == NULL);
r = write_env_file(p, a);
assert_se(r >= 0);
r = load_env_file(NULL, p, NULL, &b);
assert_se(r >= 0);
}
static void test_merge_env_file(void) {
_cleanup_(unlink_tempfilep) char t[] = "/tmp/test-fileio-XXXXXX";
int fd, r;
_cleanup_fclose_ FILE *f = NULL;
_cleanup_strv_free_ char **a = NULL;
char **i;
fd = mkostemp_safe(t);
assert_se(fd >= 0);
log_info("/* %s (%s) */", __func__, t);
f = fdopen(fd, "w");
assert_se(f);
r = write_string_stream(f,
"one=1 \n"
"twelve=${one}2\n"
"twentyone=2${one}\n"
"one=2\n"
"twentytwo=2${one}\n"
"xxx_minus_three=$xxx - 3\n"
"xxx=0x$one$one$one\n"
"yyy=${one:-fallback}\n"
"zzz=${one:+replacement}\n"
"zzzz=${foobar:-${nothing}}\n"
"zzzzz=${nothing:+${nothing}}\n"
, WRITE_STRING_FILE_AVOID_NEWLINE);
assert(r >= 0);
r = merge_env_file(&a, NULL, t);
assert_se(r >= 0);
strv_sort(a);
STRV_FOREACH(i, a)
log_info("Got: <%s>", *i);
assert_se(streq(a[0], "one=2"));
assert_se(streq(a[1], "twelve=12"));
assert_se(streq(a[2], "twentyone=21"));
assert_se(streq(a[3], "twentytwo=22"));
assert_se(streq(a[4], "xxx=0x222"));
assert_se(streq(a[5], "xxx_minus_three= - 3"));
assert_se(streq(a[6], "yyy=2"));
assert_se(streq(a[7], "zzz=replacement"));
assert_se(streq(a[8], "zzzz="));
assert_se(streq(a[9], "zzzzz="));
assert_se(a[10] == NULL);
r = merge_env_file(&a, NULL, t);
assert_se(r >= 0);
strv_sort(a);
STRV_FOREACH(i, a)
log_info("Got2: <%s>", *i);
assert_se(streq(a[0], "one=2"));
assert_se(streq(a[1], "twelve=12"));
assert_se(streq(a[2], "twentyone=21"));
assert_se(streq(a[3], "twentytwo=22"));
assert_se(streq(a[4], "xxx=0x222"));
assert_se(streq(a[5], "xxx_minus_three=0x222 - 3"));
assert_se(streq(a[6], "yyy=2"));
assert_se(streq(a[7], "zzz=replacement"));
assert_se(streq(a[8], "zzzz="));
assert_se(streq(a[9], "zzzzz="));
assert_se(a[10] == NULL);
}
static void test_merge_env_file_invalid(void) {
_cleanup_(unlink_tempfilep) char t[] = "/tmp/test-fileio-XXXXXX";
int fd, r;
_cleanup_fclose_ FILE *f = NULL;
_cleanup_strv_free_ char **a = NULL;
char **i;
fd = mkostemp_safe(t);
assert_se(fd >= 0);
log_info("/* %s (%s) */", __func__, t);
f = fdopen(fd, "w");
assert_se(f);
r = write_string_stream(f,
"unset one \n"
"unset one= \n"
"unset one=1 \n"
"one \n"
"one = \n"
"one two =\n"
"\x20two=\n"
"#comment=comment\n"
";comment2=comment2\n"
"#\n"
"\n\n" /* empty line */
, WRITE_STRING_FILE_AVOID_NEWLINE);
assert(r >= 0);
r = merge_env_file(&a, NULL, t);
assert_se(r >= 0);
STRV_FOREACH(i, a)
log_info("Got: <%s>", *i);
assert_se(strv_isempty(a));
}
static void test_executable_is_script(void) {
_cleanup_(unlink_tempfilep) char t[] = "/tmp/test-fileio-XXXXXX";
int fd, r;
_cleanup_fclose_ FILE *f = NULL;
char *command;
fd = mkostemp_safe(t);
assert_se(fd >= 0);
f = fdopen(fd, "w");
assert_se(f);
fputs("#! /bin/script -a -b \ngoo goo", f);
fflush(f);
r = executable_is_script(t, &command);
assert_se(r > 0);
assert_se(streq(command, "/bin/script"));
free(command);
r = executable_is_script("/bin/sh", &command);
assert_se(r == 0);
r = executable_is_script("/usr/bin/yum", &command);
assert_se(r > 0 || r == -ENOENT);
if (r > 0) {
assert_se(startswith(command, "/"));
free(command);
}
}
static void test_status_field(void) {
_cleanup_free_ char *t = NULL, *p = NULL, *s = NULL, *z = NULL;
unsigned long long total = 0, buffers = 0;
int r;
assert_se(get_proc_field("/proc/self/status", "Threads", WHITESPACE, &t) == 0);
puts(t);
assert_se(streq(t, "1"));
r = get_proc_field("/proc/meminfo", "MemTotal", WHITESPACE, &p);
if (r != -ENOENT) {
assert_se(r == 0);
puts(p);
assert_se(safe_atollu(p, &total) == 0);
}
r = get_proc_field("/proc/meminfo", "Buffers", WHITESPACE, &s);
if (r != -ENOENT) {
assert_se(r == 0);
puts(s);
assert_se(safe_atollu(s, &buffers) == 0);
}
if (p)
assert_se(buffers < total);
/* Seccomp should be a good test for field full of zeros. */
r = get_proc_field("/proc/meminfo", "Seccomp", WHITESPACE, &z);
if (r != -ENOENT) {
assert_se(r == 0);
puts(z);
assert_se(safe_atollu(z, &buffers) == 0);
}
}
static void test_capeff(void) {
int pid, p;
for (pid = 0; pid < 2; pid++) {
_cleanup_free_ char *capeff = NULL;
int r;
r = get_process_capeff(0, &capeff);
log_info("capeff: '%s' (r=%d)", capeff, r);
if (IN_SET(r, -ENOENT, -EPERM))
return;
assert_se(r == 0);
assert_se(*capeff);
p = capeff[strspn(capeff, HEXDIGITS)];
assert_se(!p || isspace(p));
}
}
static void test_write_string_stream(void) {
_cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-write_string_stream-XXXXXX";
_cleanup_fclose_ FILE *f = NULL;
int fd;
char buf[64];
fd = mkostemp_safe(fn);
assert_se(fd >= 0);
f = fdopen(fd, "r");
assert_se(f);
assert_se(write_string_stream(f, "boohoo", 0) < 0);
f = safe_fclose(f);
f = fopen(fn, "r+");
assert_se(f);
assert_se(write_string_stream(f, "boohoo", 0) == 0);
rewind(f);
assert_se(fgets(buf, sizeof(buf), f));
assert_se(streq(buf, "boohoo\n"));
f = safe_fclose(f);
f = fopen(fn, "w+");
assert_se(f);
assert_se(write_string_stream(f, "boohoo", WRITE_STRING_FILE_AVOID_NEWLINE) == 0);
rewind(f);
assert_se(fgets(buf, sizeof(buf), f));
printf(">%s<", buf);
assert_se(streq(buf, "boohoo"));
}
static void test_write_string_file(void) {
_cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-write_string_file-XXXXXX";
char buf[64] = {};
_cleanup_close_ int fd;
fd = mkostemp_safe(fn);
assert_se(fd >= 0);
assert_se(write_string_file(fn, "boohoo", WRITE_STRING_FILE_CREATE) == 0);
assert_se(read(fd, buf, sizeof(buf)) == 7);
assert_se(streq(buf, "boohoo\n"));
}
static void test_write_string_file_no_create(void) {
_cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-write_string_file_no_create-XXXXXX";
_cleanup_close_ int fd;
char buf[64] = {0};
fd = mkostemp_safe(fn);
assert_se(fd >= 0);
assert_se(write_string_file("/a/file/which/does/not/exists/i/guess", "boohoo", 0) < 0);
assert_se(write_string_file(fn, "boohoo", 0) == 0);
assert_se(read(fd, buf, sizeof(buf)) == STRLEN("boohoo\n"));
assert_se(streq(buf, "boohoo\n"));
}
static void test_write_string_file_verify(void) {
_cleanup_free_ char *buf = NULL, *buf2 = NULL;
int r;
assert_se(read_one_line_file("/proc/cmdline", &buf) >= 0);
assert_se(buf2 = strjoin(buf, "\n"));
r = write_string_file("/proc/cmdline", buf, 0);
assert_se(IN_SET(r, -EACCES, -EIO));
r = write_string_file("/proc/cmdline", buf2, 0);
assert_se(IN_SET(r, -EACCES, -EIO));
assert_se(write_string_file("/proc/cmdline", buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE) == 0);
assert_se(write_string_file("/proc/cmdline", buf2, WRITE_STRING_FILE_VERIFY_ON_FAILURE) == 0);
r = write_string_file("/proc/cmdline", buf, WRITE_STRING_FILE_VERIFY_ON_FAILURE|WRITE_STRING_FILE_AVOID_NEWLINE);
assert_se(IN_SET(r, -EACCES, -EIO));
assert_se(write_string_file("/proc/cmdline", buf2, WRITE_STRING_FILE_VERIFY_ON_FAILURE|WRITE_STRING_FILE_AVOID_NEWLINE) == 0);
}
static void test_load_env_file_pairs(void) {
_cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-load_env_file_pairs-XXXXXX";
int fd, r;
_cleanup_fclose_ FILE *f = NULL;
_cleanup_strv_free_ char **l = NULL;
char **k, **v;
fd = mkostemp_safe(fn);
assert_se(fd >= 0);
r = write_string_file(fn,
"NAME=\"Arch Linux\"\n"
"ID=arch\n"
"PRETTY_NAME=\"Arch Linux\"\n"
"ANSI_COLOR=\"0;36\"\n"
"HOME_URL=\"https://www.archlinux.org/\"\n"
"SUPPORT_URL=\"https://bbs.archlinux.org/\"\n"
"BUG_REPORT_URL=\"https://bugs.archlinux.org/\"\n",
WRITE_STRING_FILE_CREATE);
assert_se(r == 0);
f = fdopen(fd, "r");
assert_se(f);
r = load_env_file_pairs(f, fn, NULL, &l);
assert_se(r >= 0);
assert_se(strv_length(l) == 14);
STRV_FOREACH_PAIR(k, v, l) {
assert_se(STR_IN_SET(*k, "NAME", "ID", "PRETTY_NAME", "ANSI_COLOR", "HOME_URL", "SUPPORT_URL", "BUG_REPORT_URL"));
printf("%s=%s\n", *k, *v);
if (streq(*k, "NAME")) assert_se(streq(*v, "Arch Linux"));
if (streq(*k, "ID")) assert_se(streq(*v, "arch"));
if (streq(*k, "PRETTY_NAME")) assert_se(streq(*v, "Arch Linux"));
if (streq(*k, "ANSI_COLOR")) assert_se(streq(*v, "0;36"));
if (streq(*k, "HOME_URL")) assert_se(streq(*v, "https://www.archlinux.org/"));
if (streq(*k, "SUPPORT_URL")) assert_se(streq(*v, "https://bbs.archlinux.org/"));
if (streq(*k, "BUG_REPORT_URL")) assert_se(streq(*v, "https://bugs.archlinux.org/"));
}
}
static void test_search_and_fopen(void) {
const char *dirs[] = {"/tmp/foo/bar", "/tmp", NULL};
char name[] = "/tmp/test-search_and_fopen.XXXXXX";
int fd, r;
FILE *f;
fd = mkostemp_safe(name);
assert_se(fd >= 0);
close(fd);
r = search_and_fopen(basename(name), "r", NULL, dirs, &f);
assert_se(r >= 0);
fclose(f);
r = search_and_fopen(name, "r", NULL, dirs, &f);
assert_se(r >= 0);
fclose(f);
r = search_and_fopen(basename(name), "r", "/", dirs, &f);
assert_se(r >= 0);
fclose(f);
r = search_and_fopen("/a/file/which/does/not/exist/i/guess", "r", NULL, dirs, &f);
assert_se(r < 0);
r = search_and_fopen("afilewhichdoesnotexistiguess", "r", NULL, dirs, &f);
assert_se(r < 0);
r = unlink(name);
assert_se(r == 0);
r = search_and_fopen(basename(name), "r", NULL, dirs, &f);
assert_se(r < 0);
}
static void test_search_and_fopen_nulstr(void) {
const char dirs[] = "/tmp/foo/bar\0/tmp\0";
_cleanup_(unlink_tempfilep) char name[] = "/tmp/test-search_and_fopen.XXXXXX";
int fd, r;
FILE *f;
fd = mkostemp_safe(name);
assert_se(fd >= 0);
close(fd);
r = search_and_fopen_nulstr(basename(name), "r", NULL, dirs, &f);
assert_se(r >= 0);
fclose(f);
r = search_and_fopen_nulstr(name, "r", NULL, dirs, &f);
assert_se(r >= 0);
fclose(f);
r = search_and_fopen_nulstr("/a/file/which/does/not/exist/i/guess", "r", NULL, dirs, &f);
assert_se(r < 0);
r = search_and_fopen_nulstr("afilewhichdoesnotexistiguess", "r", NULL, dirs, &f);
assert_se(r < 0);
r = unlink(name);
assert_se(r == 0);
r = search_and_fopen_nulstr(basename(name), "r", NULL, dirs, &f);
assert_se(r < 0);
}
static void test_writing_tmpfile(void) {
_cleanup_(unlink_tempfilep) char name[] = "/tmp/test-systemd_writing_tmpfile.XXXXXX";
_cleanup_free_ char *contents = NULL;
size_t size;
_cleanup_close_ int fd = -1;
struct iovec iov[3];
int r;
iov[0] = IOVEC_MAKE_STRING("abc\n");
iov[1] = IOVEC_MAKE_STRING(ALPHANUMERICAL "\n");
iov[2] = IOVEC_MAKE_STRING("");
fd = mkostemp_safe(name);
printf("tmpfile: %s", name);
r = writev(fd, iov, 3);
assert_se(r >= 0);
r = read_full_file(name, &contents, &size);
assert_se(r == 0);
printf("contents: %s", contents);
assert_se(streq(contents, "abc\n" ALPHANUMERICAL "\n"));
}
static void test_tempfn(void) {
char *ret = NULL, *p;
assert_se(tempfn_xxxxxx("/foo/bar/waldo", NULL, &ret) >= 0);
assert_se(streq_ptr(ret, "/foo/bar/.#waldoXXXXXX"));
free(ret);
assert_se(tempfn_xxxxxx("/foo/bar/waldo", "[miau]", &ret) >= 0);
assert_se(streq_ptr(ret, "/foo/bar/.#[miau]waldoXXXXXX"));
free(ret);
assert_se(tempfn_random("/foo/bar/waldo", NULL, &ret) >= 0);
assert_se(p = startswith(ret, "/foo/bar/.#waldo"));
assert_se(strlen(p) == 16);
assert_se(in_charset(p, "0123456789abcdef"));
free(ret);
assert_se(tempfn_random("/foo/bar/waldo", "[wuff]", &ret) >= 0);
assert_se(p = startswith(ret, "/foo/bar/.#[wuff]waldo"));
assert_se(strlen(p) == 16);
assert_se(in_charset(p, "0123456789abcdef"));
free(ret);
assert_se(tempfn_random_child("/foo/bar/waldo", NULL, &ret) >= 0);
assert_se(p = startswith(ret, "/foo/bar/waldo/.#"));
assert_se(strlen(p) == 16);
assert_se(in_charset(p, "0123456789abcdef"));
free(ret);
assert_se(tempfn_random_child("/foo/bar/waldo", "[kikiriki]", &ret) >= 0);
assert_se(p = startswith(ret, "/foo/bar/waldo/.#[kikiriki]"));
assert_se(strlen(p) == 16);
assert_se(in_charset(p, "0123456789abcdef"));
free(ret);
}
static const char buffer[] =
"Some test data\n"
"With newlines, and a NUL byte\0"
"\n"
"an empty line\n"
"an ignored line\n"
"and a very long line that is supposed to be truncated, because it is so long\n";
static void test_read_line_one_file(FILE *f) {
_cleanup_free_ char *line = NULL;
assert_se(read_line(f, (size_t) -1, &line) == 15 && streq(line, "Some test data"));
line = mfree(line);
assert_se(read_line(f, 1024, &line) == 30 && streq(line, "With newlines, and a NUL byte"));
line = mfree(line);
assert_se(read_line(f, 1024, &line) == 1 && streq(line, ""));
line = mfree(line);
assert_se(read_line(f, 1024, &line) == 14 && streq(line, "an empty line"));
line = mfree(line);
assert_se(read_line(f, (size_t) -1, NULL) == 16);
assert_se(read_line(f, 16, &line) == -ENOBUFS);
line = mfree(line);
/* read_line() stopped when it hit the limit, that means when we continue reading we'll read at the first
* character after the previous limit. Let's make use of tha to continue our test. */
assert_se(read_line(f, 1024, &line) == 61 && streq(line, "line that is supposed to be truncated, because it is so long"));
line = mfree(line);
assert_se(read_line(f, 1024, &line) == 1 && streq(line, ""));
line = mfree(line);
assert_se(read_line(f, 1024, &line) == 0 && streq(line, ""));
}
static void test_read_line(void) {
_cleanup_fclose_ FILE *f = NULL;
f = fmemopen((void*) buffer, sizeof(buffer), "re");
assert_se(f);
test_read_line_one_file(f);
}
static void test_read_line2(void) {
_cleanup_(unlink_tempfilep) char name[] = "/tmp/test-fileio.XXXXXX";
int fd;
_cleanup_fclose_ FILE *f = NULL;
fd = mkostemp_safe(name);
assert_se(fd >= 0);
assert_se((size_t) write(fd, buffer, sizeof(buffer)) == sizeof(buffer));
assert_se(lseek(fd, 0, SEEK_SET) == 0);
assert_se(f = fdopen(fd, "r"));
test_read_line_one_file(f);
}
static void test_read_line3(void) {
_cleanup_fclose_ FILE *f = NULL;
_cleanup_free_ char *line = NULL;
int r;
f = fopen("/proc/cmdline", "re");
if (!f && IN_SET(errno, ENOENT, EPERM))
return;
assert_se(f);
r = read_line(f, LINE_MAX, &line);
assert_se((size_t) r == strlen(line) + 1);
assert_se(read_line(f, LINE_MAX, NULL) == 0);
}
int main(int argc, char *argv[]) {
test_setup_logging(LOG_DEBUG);
test_parse_env_file();
test_parse_multiline_env_file();
test_merge_env_file();
test_merge_env_file_invalid();
test_executable_is_script();
test_status_field();
test_capeff();
test_write_string_stream();
test_write_string_file();
test_write_string_file_no_create();
test_write_string_file_verify();
test_load_env_file_pairs();
test_search_and_fopen();
test_search_and_fopen_nulstr();
test_writing_tmpfile();
test_tempfn();
test_read_line();
test_read_line2();
test_read_line3();
return 0;
}
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