diff options
Diffstat (limited to 'src/backend/postmaster/postmaster.c')
| -rw-r--r-- | src/backend/postmaster/postmaster.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c index db797c040b..328ecafa8c 100644 --- a/src/backend/postmaster/postmaster.c +++ b/src/backend/postmaster/postmaster.c @@ -98,6 +98,7 @@ #include "catalog/pg_control.h" #include "common/file_perm.h" #include "common/ip.h" +#include "common/pg_prng.h" #include "common/string.h" #include "lib/ilist.h" #include "libpq/auth.h" @@ -2699,19 +2700,19 @@ ClosePostmasterPorts(bool am_syslogger) void InitProcessGlobals(void) { - unsigned int rseed; - MyProcPid = getpid(); MyStartTimestamp = GetCurrentTimestamp(); MyStartTime = timestamptz_to_time_t(MyStartTimestamp); /* - * Set a different seed for random() in every process. We want something + * Set a different global seed in every process. We want something * unpredictable, so if possible, use high-quality random bits for the * seed. Otherwise, fall back to a seed based on timestamp and PID. */ - if (!pg_strong_random(&rseed, sizeof(rseed))) + if (unlikely(!pg_prng_strong_seed(&pg_global_prng_state))) { + uint64 rseed; + /* * Since PIDs and timestamps tend to change more frequently in their * least significant bits, shift the timestamp left to allow a larger @@ -2722,8 +2723,17 @@ InitProcessGlobals(void) rseed = ((uint64) MyProcPid) ^ ((uint64) MyStartTimestamp << 12) ^ ((uint64) MyStartTimestamp >> 20); + + pg_prng_seed(&pg_global_prng_state, rseed); } - srandom(rseed); + + /* + * Also make sure that we've set a good seed for random(3). Use of that + * is deprecated in core Postgres, but extensions might use it. + */ +#ifndef WIN32 + srandom(pg_prng_uint32(&pg_global_prng_state)); +#endif } |