diff options
Diffstat (limited to 'src/time/__tz.c')
| -rw-r--r-- | src/time/__tz.c | 49 |
1 files changed, 33 insertions, 16 deletions
diff --git a/src/time/__tz.c b/src/time/__tz.c index 49a7371e..c34b3eb7 100644 --- a/src/time/__tz.c +++ b/src/time/__tz.c @@ -4,8 +4,15 @@ #include <stdlib.h> #include <string.h> #include <sys/mman.h> +#include <ctype.h> #include "libc.h" #include "lock.h" +#include "fork_impl.h" + +#define malloc __libc_malloc +#define calloc undef +#define realloc undef +#define free undef long __timezone = 0; int __daylight = 0; @@ -30,6 +37,7 @@ static char *old_tz = old_tz_buf; static size_t old_tz_size = sizeof old_tz_buf; static volatile int lock[1]; +volatile int *const __timezone_lockptr = lock; static int getint(const char **p) { @@ -147,10 +155,21 @@ static void do_tzset() } if (old_tz) memcpy(old_tz, s, i+1); + int posix_form = 0; + if (*s != ':') { + p = s; + char dummy_name[TZNAME_MAX+1]; + getname(dummy_name, &p); + if (p!=s && (*p == '+' || *p == '-' || isdigit(*p) + || !strcmp(dummy_name, "UTC") + || !strcmp(dummy_name, "GMT"))) + posix_form = 1; + } + /* Non-suid can use an absolute tzfile pathname or a relative * pathame beginning with "."; in secure mode, only the * standard path will be searched. */ - if (*s == ':' || ((p=strchr(s, '/')) && !memchr(s, ',', p-s))) { + if (!posix_form) { if (*s == ':') s++; if (*s == '/' || *s == '.') { if (!libc.secure || !strcmp(s, "/etc/localtime")) @@ -178,7 +197,7 @@ static void do_tzset() zi = map; if (map) { int scale = 2; - if (sizeof(time_t) > 4 && map[4]=='2') { + if (map[4]!='1') { size_t skip = zi_dotprod(zi+20, VEC(1,1,8,5,6,1), 6); trans = zi+skip+44+44; scale++; @@ -274,22 +293,20 @@ static size_t scan_trans(long long t, int local, size_t *alt) n = (index-trans)>>scale; if (a == n-1) return -1; if (a == 0) { - x = zi_read32(trans + (a<<scale)); - if (scale == 3) x = x<<32 | zi_read32(trans + (a<<scale) + 4); + x = zi_read32(trans); + if (scale == 3) x = x<<32 | zi_read32(trans + 4); else x = (int32_t)x; - if (local) off = (int32_t)zi_read32(types + 6 * index[a-1]); + /* Find the lowest non-DST type, or 0 if none. */ + size_t j = 0; + for (size_t i=abbrevs-types; i; i-=6) { + if (!types[i-6+4]) j = i-6; + } + if (local) off = (int32_t)zi_read32(types + j); + /* If t is before first transition, use the above-found type + * and the index-zero (after transition) type as the alt. */ if (t - off < (int64_t)x) { - for (a=0; a<(abbrevs-types)/6; a++) { - if (types[6*a+4] != types[4]) break; - } - if (a == (abbrevs-types)/6) a = 0; - if (types[6*a+4]) { - *alt = a; - return 0; - } else { - *alt = 0; - return a; - } + if (alt) *alt = index[0]; + return j/6; } } |