diff options
Diffstat (limited to 'time')
| -rw-r--r-- | time/tzfile.c | 23 | ||||
| -rw-r--r-- | time/tzset.c | 9 |
2 files changed, 28 insertions, 4 deletions
diff --git a/time/tzfile.c b/time/tzfile.c index 2c178253e4..b118e07dc4 100644 --- a/time/tzfile.c +++ b/time/tzfile.c @@ -24,11 +24,14 @@ #include <string.h> #include <time.h> #include <unistd.h> +#include <sys/stat.h> #define NOID #include <timezone/tzfile.h> int __use_tzfile; +static dev_t tzfile_dev; +static ino64_t tzfile_ino; struct ttinfo { @@ -97,6 +100,7 @@ __tzfile_read (const char *file, size_t extra, char **extrap) size_t total_size; size_t types_idx; size_t leaps_idx; + int was_using_tzfile = __use_tzfile; __use_tzfile = 0; @@ -154,6 +158,25 @@ __tzfile_read (const char *file, size_t extra, char **extrap) if (f == NULL) return; + /* Get information about the file. */ + struct stat64 st; + if (fstat64 (fileno (f), &st) != 0) + { + fclose (f); + return; + } + if (was_using_tzfile && tzfile_ino == st.st_ino && tzfile_dev == st.st_dev) + { + /* It's the same file. No further work needed. */ + fclose (f); + __use_tzfile = 1; + return; + } + + /* Remember the inode and device number. */ + tzfile_dev = st.st_dev; + tzfile_ino = st.st_ino; + /* No threads reading this stream. */ __fsetlocking (f, FSETLOCKING_BYCALLER); diff --git a/time/tzset.c b/time/tzset.c index 2274a38f59..aa866918e5 100644 --- a/time/tzset.c +++ b/time/tzset.c @@ -159,10 +159,7 @@ tzset_internal (always) /* Examine the TZ environment variable. */ tz = getenv ("TZ"); - if (tz == NULL) - /* No user specification; use the site-wide default. */ - tz = TZDEFAULT; - else if (*tz == '\0') + if (tz && *tz == '\0') /* User specified the empty string; use UTC explicitly. */ tz = "Universal"; @@ -177,6 +174,10 @@ tzset_internal (always) /* No change, simply return. */ return; + if (tz == NULL) + /* No user specification; use the site-wide default. */ + tz = TZDEFAULT; + tz_rules[0].name = NULL; tz_rules[1].name = NULL; |