diff options
Diffstat (limited to 'timezone/tst-tzset.c')
| -rw-r--r-- | timezone/tst-tzset.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/timezone/tst-tzset.c b/timezone/tst-tzset.c new file mode 100644 index 0000000..aefcc76 --- /dev/null +++ b/timezone/tst-tzset.c @@ -0,0 +1,200 @@ +/* tzset tests with crafted time zone data. + Copyright (C) 2015 Free Software Foundation, Inc. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#define _GNU_SOURCE 1 + +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/resource.h> +#include <time.h> +#include <unistd.h> + +static int do_test (void); +#define TEST_FUNCTION do_test () +#include "../test-skeleton.c" + +/* Returns the name of a large TZ file. */ +static char * +create_tz_file (off64_t size) +{ + char *path; + int fd = create_temp_file ("tst-tzset-", &path); + if (fd < 0) + exit (1); + + // Reopen for large-file support. + close (fd); + fd = open64 (path, O_WRONLY); + if (fd < 0) + { + printf ("open64 (%s) failed: %m\n", path); + exit (1); + } + + static const char data[] = { + 0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, + 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, + 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x58, 0x54, 0x47, 0x00, 0x00, 0x00, + 0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, + 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, + 0x00, 0x00, 0x00, 0x04, 0xf8, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x58, 0x54, 0x47, 0x00, 0x00, + 0x00, 0x0a, 0x58, 0x54, 0x47, 0x30, 0x0a + }; + ssize_t ret = write (fd, data, sizeof (data)); + if (ret < 0) + { + printf ("write failed: %m\n"); + exit (1); + } + if ((size_t) ret != sizeof (data)) + { + printf ("Short write\n"); + exit (1); + } + if (lseek64 (fd, size, SEEK_CUR) < 0) + { + printf ("lseek failed: %m\n"); + close (fd); + return NULL; + } + if (write (fd, "", 1) != 1) + { + printf ("Single-byte write failed\n"); + close (fd); + return NULL; + } + if (close (fd) != 0) + { + printf ("close failed: %m\n"); + exit (1); + } + return path; +} + +static void +test_tz_file (off64_t size) +{ + char *path = create_tz_file (size); + if (setenv ("TZ", path, 1) < 0) + { + printf ("setenv failed: %m\n"); + exit (1); + } + tzset (); + free (path); +} + +static int +do_test (void) +{ + /* Limit the size of the process. Otherwise, some of the tests will + consume a lot of resources. */ + { + struct rlimit limit; + if (getrlimit (RLIMIT_AS, &limit) != 0) + { + printf ("getrlimit (RLIMIT_AS) failed: %m\n"); + return 1; + } + long target = 512 * 1024 * 1024; + if (limit.rlim_cur == RLIM_INFINITY || limit.rlim_cur > target) + { + limit.rlim_cur = 512 * 1024 * 1024; + if (setrlimit (RLIMIT_AS, &limit) != 0) + { + printf ("setrlimit (RLIMIT_AS) failed: %m\n"); + return 1; + } + } + } + + int errors = 0; + for (int i = 1; i <= 4; ++i) + { + char tz[16]; + snprintf (tz, sizeof (tz), "XT%d", i); + if (setenv ("TZ", tz, 1) < 0) + { + printf ("setenv failed: %m\n"); + return 1; + } + tzset (); + if (strcmp (tzname[0], tz) == 0) + { + printf ("Unexpected success for %s\n", tz); + ++errors; + } + } + + /* Large TZ files. */ + + /* This will succeed on 64-bit architectures, and fail on 32-bit + architectures. It used to crash on 32-bit. */ + test_tz_file (64 * 1024 * 1024); + + /* This will fail on 64-bit and 32-bit architectures. It used to + cause a test timeout on 64-bit and crash on 32-bit if the TZ file + open succeeded for some reason (it does not use O_LARGEFILE in + regular builds). */ + test_tz_file (4LL * 1024 * 1024 * 1024 - 6); + + /* Large TZ variables. */ + { + size_t length = 64 * 1024 * 1024; + char *value = malloc (length + 1); + if (value == NULL) + { + puts ("malloc failed: %m"); + return 1; + } + value[length] = '\0'; + + memset (value, ' ', length); + value[0] = 'U'; + value[1] = 'T'; + value[2] = 'C'; + if (setenv ("TZ", value, 1) < 0) + { + printf ("setenv failed: %m\n"); + return 1; + } + tzset (); + + memset (value, '0', length); + value[0] = '<'; + value[length - 1] = '>'; + if (setenv ("TZ", value, 1) < 0) + { + printf ("setenv failed: %m\n"); + return 1; + } + tzset (); + } + + return errors > 0; +} |