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Allow libpq to do thread-safe SIGPIPE handling. This allows it to

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ignore SIGPIPE from send() in libpq, but terminate on any other SIGPIPE,
unless the user installs their own signal handler.

This is a minor fix because the only time you get SIGPIPE from libpq's
send() is when the backend dies.
This commit is contained in:
Bruce Momjian
2004-01-09 02:02:43 +00:00
parent acc57543de
commit 0150dbdce5
9 changed files with 167 additions and 12 deletions
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16
src/interfaces/libpq/fe-print.c
View File

@ -10,7 +10,7 @@
* didn't really belong there.
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/interfaces/libpq/fe-print.c,v 1.49 2003/11/29 19:52:12 pgsql Exp $
* $PostgreSQL: pgsql/src/interfaces/libpq/fe-print.c,v 1.50 2004/01/09 02:02:43 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -90,8 +90,10 @@ PQprint(FILE *fout,
int fs_len = strlen(po->fieldSep);
int total_line_length = 0;
int usePipe = 0;
pqsigfunc oldsigpipehandler = NULL;
char *pagerenv;
#if !defined(ENABLE_THREAD_SAFETY) && !defined(WIN32)
pqsigfunc oldsigpipehandler = NULL;
#endif
#ifdef TIOCGWINSZ
struct winsize screen_size;
@ -189,8 +191,12 @@ PQprint(FILE *fout,
if (fout)
{
usePipe = 1;
#ifdef ENABLE_THREAD_SAFETY
pthread_setspecific(thread_in_send, "t");
#else
#ifndef WIN32
oldsigpipehandler = pqsignal(SIGPIPE, SIG_IGN);
#endif
#endif
}
else
@ -306,7 +312,13 @@ PQprint(FILE *fout,
_pclose(fout);
#else
pclose(fout);
#endif
#ifdef ENABLE_THREAD_SAFETY
pthread_setspecific(thread_in_send, "f");
#else
#ifndef WIN32
pqsignal(SIGPIPE, oldsigpipehandler);
#endif
#endif
}
if (po->html3 && !po->expanded)