aboutsummaryrefslogtreecommitdiff
path: root/time/tzset.c
diff options
context:
space:
mode:
authorUlrich Drepper <drepper@redhat.com>1996-12-15 02:15:29 +0000
committerUlrich Drepper <drepper@redhat.com>1996-12-15 02:15:29 +0000
commit68dbb3a69e78e24a778c6602c8cc91d715839d08 (patch)
tree2201a2cfe38cf2817b6dfd37415dac21c7a41b2f /time/tzset.c
parentf8b87ef0d47ea0db7304a9c59d5479aebdaea347 (diff)
downloadglibc-68dbb3a69e78e24a778c6602c8cc91d715839d08.zip
glibc-68dbb3a69e78e24a778c6602c8cc91d715839d08.tar.gz
glibc-68dbb3a69e78e24a778c6602c8cc91d715839d08.tar.bz2
update from main archive 961214cvs/libc-961215
Sun Dec 15 01:53:20 1996 Ulrich Drepper <drepper@cygnus.com> * Makefile (subdirs): Change crypt to md5-crypt. * crypt/Makefile, crypt/md5-crypt.c, crypt/md5.c, crypt/md5.h, crypt/md5c-test.c, crypt/md5test.c: Move to new directory md5-crypt. * sysdeps/unix/sysv/linux/configure.in: Refer to linuxthreads and crypt instead of LinuxThreads and des-crypt. * Makefile (subdirs): Add nss back. * sysdeps/unix/inet/Subdirs: Move nis to end of file to fulfill dependencies. * libio/iofclose.c: Implement fclose(NULL) as closing all streams. * stdio-common/Makefile (routines): Add fcloseall. * stdio-common/fcloseall.c: New file. * sysdeps/generic/abort.c: Make implementation POSIX.1 compatible. * sysdeps/mach/libc-lock.h: Add definition of __libc_lock_trylock. * sysdeps/stub/libc-lock.h: Define __libc_lock_trylock to always return 0. * stdio-common/printf.h: Define MIN and MAX only if not already defined. * stdio-common/vfprintf.c: Set errno to EBADF if stream does not allow writing. Required by POSIX.1. * libio/libioP.h (CHECK_FILE): Use MAYBE_SET_EINVAL instead of assignment. * interp.c: Update copyright. * libio/clearerr.c: Likewise. * libio/ioseekoff.c: Likewise. * libio/ioseekpos.c: Likewise. * stdio/fclose.c: Likewise. * stdio/fflus.c: Likewise. * libio/libio.h [!_IO_MTSAFE_IO]: Define _IO_cleanup_region_start and _IO_cleanup_region_end as empty. * libio/fgetc.c: Use _IO_cleanup_region_start and _IO_cleanup_region_end instead of __libc_cleanup_region_start and __libc_cleanup_region_end. * libio/fputc.c: Likewise. * libio/freopen.c: Likewise. * libio/fseek.c: Likewise. * libio/getc.c: Likewise. * libio/getchar.c: Likewise. * libio/iofclose.c: Likewise. * libio/iofflush.c: Likewise. * libio/iofgetpos.c: Likewise. * libio/iofgets.c: Likewise. * libio/iofputs.c: Likewise. * libio/iofread.c: Likewise. * libio/iofsetpos.c: Likewise. * libio/ioftell.c: Likewise. * libio/iofwrite.c: Likewise. * libio/iogetdelim.c: Likewise. * libio/iogets.c: Likewise. * libio/ioputs.c: Likewise. * libio/iosetbuffer.c: Likewise. * libio/iosetvbuf.c: Likewise. * libio/ioungetc.c: Likewise. * libio/iovspintf.c: Use cleanup handler to make sure no dangling locks can stay over. * libio/iovsscanf.c: Likewise. * libio/genops.c: Use _IO_lock_init_recursive and _IO_lock_fini instead of __libc_lock_init_recursive and __libc_lock_fini. * libio/filedoalloc.c: Only use __isatty when compiling GNU libc. Otherwise use isatty. * libio/fileops.c: Likewise for __open and open. * login/utmp_file.c (getutent_r_file): Use fcntl instead of flock. * nis/ypclnt.h: Add more casts to prevent warnings. * nss/Makefile (services): Remove dns. (libnss_dns, libnss_dns-inhibit-o): Remove definition. ($(objpfx)libnss_dns.so): Removed. * nss/nss_dns/dns-host.c, nss/nss_dns/dns-network.c: Moved to... * resolv/nss_dns: ...here. * resolv/Makefile (extra-libs): Add libnss_dns. (libnss_dns-routines, libnss_dns-inhibit-o): Define as in nss/Makefile. * nss/XXX-lookup.c: Call __nss_database_lookup with new argument specifying alternate name for entry in /etc/nsswitch.conf * nss/nsswitch.c: If no entry with primary name is found in /etc/nsswitch.conf try alternate name if given. * nss/nsswitch.h: Add new parameter in prototype for __nss_database_lookup. * nss/spwd-lookup.c: Provide alternative entry name to look for. This makes our NSS compatible with Solaris' nsswitch.conf files. * string/tst-strlen.c: Change all counting variables to type size_t to prevent warnings. * sysdeps/posix/fpathconf.c: Update copyright. * sysdeps/posix/pathconf.c: Don't call fpathconf to do the work. Opening the file at this path may fail if it is a FIFO or pipe. These changes make the time implementation POSIX.1 compliant. * time/localtime.c (__localtime_r): Always call __tzset not only if __tzset_run is zero. * time/strftime.c: Add definition of memset_space to help to reduce for systems which have memset. (strftime): Don't use tm_zone member of argument for zone name. Instead always use tzname[]. Call tzset() as required by POSIX.1 before any action. * time/tzset.c (tzset): Set tzname[] as required by POSIX.1. Remove global variable __tzset_run. __tzset is now called always when a dependent function is used. (__tzset): Caching happens based on the contents of the environment variable TZ. Fri Dec 13 01:06:52 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/sysv/linux/paths.h: Add _PATH_KLOG. Thu Dec 12 09:16:35 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * rellns-sh: Correctly handle a relative source file name. Wed Dec 11 19:18:40 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * login/utmp_file.c (setutent_file): Seek back to beginning of the file if resetting. Thu Dec 12 16:39:12 1996 Thomas Bushnell, n/BSG <thomas@gnu.ai.mit.edu> * hurd/hurdinit.c (map0): Delete function. Don't do this on _hurd_preinit_hook. * hurd/hurdstartup.c (_hurd_startup): Map page zero redzone here.
Diffstat (limited to 'time/tzset.c')
-rw-r--r--time/tzset.c65
1 files changed, 39 insertions, 26 deletions
diff --git a/time/tzset.c b/time/tzset.c
index 954cec2..6a9ebe1 100644
--- a/time/tzset.c
+++ b/time/tzset.c
@@ -74,7 +74,7 @@ static tz_rule tz_rules[2];
static int compute_change __P ((tz_rule *rule, int year));
-int __tzset_run = 0;
+static char *old_tz = NULL;
/* Interpret the TZ envariable. */
void
@@ -85,6 +85,20 @@ __tzset ()
unsigned short int hh, mm, ss;
unsigned short int whichrule;
+ /* Examine the TZ environment variable. */
+ tz = getenv ("TZ");
+
+ /* A leading colon means "implementation defined syntax".
+ We ignore the colon and always use the same algorithm:
+ try a data file, and if none exists parse the 1003.1 syntax. */
+ if (tz && *tz == ':')
+ ++tz;
+
+ /* Check whether the value changes since the last run. */
+ if (old_tz != NULL && tz != NULL && strcmp (tz, old_tz) == 0)
+ /* No change, simply return. */
+ return;
+
/* Free old storage. */
if (tz_rules[0].name != NULL && *tz_rules[0].name != '\0')
{
@@ -98,22 +112,15 @@ __tzset ()
tz_rules[1].name = NULL;
}
- /* Examine the TZ environment variable. */
- tz = getenv ("TZ");
-
- /* A leading colon means "implementation defined syntax".
- We ignore the colon and always use the same algorithm:
- try a data file, and if none exists parse the 1003.1 syntax. */
- if (tz && *tz == ':')
- ++tz;
+ /* Save the value of `tz'. */
+ if (old_tz != NULL)
+ free (old_tz);
+ old_tz = tz ? __strdup (tz) : NULL;
/* Try to read a data file. */
__tzfile_read (tz);
if (__use_tzfile)
- {
- __tzset_run = 1;
- return;
- }
+ return;
/* No data file found. Default to UTC if nothing specified. */
@@ -121,10 +128,10 @@ __tzset ()
{
static const char UTC[] = "UTC";
size_t len = sizeof UTC;
- tz_rules[0].name = (char *) malloc(len);
+ tz_rules[0].name = (char *) malloc (len);
if (tz_rules[0].name == NULL)
return;
- tz_rules[1].name = (char *) malloc(len);
+ tz_rules[1].name = (char *) malloc (len);
if (tz_rules[1].name == NULL)
return;
memcpy ((void *) tz_rules[0].name, UTC, len);
@@ -136,7 +143,6 @@ __tzset ()
tz_rules[0].offset = tz_rules[1].offset = 0L;
tz_rules[0].change = tz_rules[1].change = (time_t) -1;
tz_rules[0].computed_for = tz_rules[1].computed_for = 0;
- __tzset_run = 1;
return;
}
@@ -147,8 +153,12 @@ __tzset ()
/* Get the standard timezone name. */
tz_rules[0].name = (char *) malloc (strlen (tz) + 1);
if (tz_rules[0].name == NULL)
- /* Don't set __tzset_run so we will try again. */
- return;
+ {
+ /* Clear the old tz name so we will try again. */
+ free (old_tz);
+ old_tz = NULL;
+ return;
+ }
if (sscanf(tz, "%[^0-9,+-]", tz_rules[0].name) != 1 ||
(l = strlen(tz_rules[0].name)) < 3)
@@ -257,7 +267,8 @@ __tzset ()
tz_rules[0].offset, tz_rules[1].offset);
if (__use_tzfile)
{
- __tzset_run = 1;
+ free (old_tz);
+ old_tz = NULL;
return;
}
}
@@ -353,8 +364,6 @@ __tzset ()
tzr->computed_for = -1;
}
-
- __tzset_run = 1;
}
/* Maximum length of a timezone name. __tz_compute keeps this up to date
@@ -365,8 +374,7 @@ size_t __tzname_cur_max;
long int
__tzname_max ()
{
- if (! __tzset_run)
- __tzset ();
+ __tzset ();
return __tzname_cur_max;
}
@@ -450,7 +458,7 @@ compute_change (rule, year)
/* T is now the Epoch-relative time of 0:00:00 GMT on the day we want.
Just add the time of day and local offset from GMT, and we're done. */
- rule->change = t + rule->offset + rule->secs;
+ rule->change = t - rule->offset + rule->secs;
rule->computed_for = year;
return 1;
}
@@ -464,8 +472,7 @@ __tz_compute (timer, tm)
time_t timer;
const struct tm *tm;
{
- if (! __tzset_run)
- __tzset ();
+ __tzset ();
if (! compute_change (&tz_rules[0], 1900 + tm->tm_year) ||
! compute_change (&tz_rules[1], 1900 + tm->tm_year))
@@ -504,6 +511,12 @@ weak_function
tzset (void)
{
__libc_lock_lock (__tzset_lock);
+
__tzset ();
+
+ /* Set `tzname'. */
+ __tzname[0] = (char *) tz_rules[0].name;
+ __tzname[1] = (char *) tz_rules[1].name;
+
__libc_lock_unlock (__tzset_lock);
}