diff options
Diffstat (limited to 'src/bin/psql/common.c')
| -rw-r--r-- | src/bin/psql/common.c | 45 |
1 files changed, 44 insertions, 1 deletions
diff --git a/src/bin/psql/common.c b/src/bin/psql/common.c index e74b8c2769f..c79d61cfbca 100644 --- a/src/bin/psql/common.c +++ b/src/bin/psql/common.c @@ -3,7 +3,7 @@ * * Copyright 2000 by PostgreSQL Global Development Group * - * $Header: /cvsroot/pgsql/src/bin/psql/common.c,v 1.48 2002/10/15 16:44:21 tgl Exp $ + * $Header: /cvsroot/pgsql/src/bin/psql/common.c,v 1.49 2002/10/23 19:23:56 momjian Exp $ */ #include "postgres_fe.h" @@ -515,3 +515,46 @@ SendQuery(const char *query) return success; } + + +/* + * PageOutput + * + * Tests if pager is needed and returns appropriate FILE pointer. + */ +FILE * +PageOutput(int lines, bool pager) +{ + /* check whether we need / can / are supposed to use pager */ + if (pager +#ifndef WIN32 + && + isatty(fileno(stdin)) && + isatty(fileno(stdout)) +#endif + ) + { + const char *pagerprog; + +#ifdef TIOCGWINSZ + int result; + struct winsize screen_size; + + result = ioctl(fileno(stdout), TIOCGWINSZ, &screen_size); + if (result == -1 || lines > screen_size.ws_row) + { +#endif + pagerprog = getenv("PAGER"); + if (!pagerprog) + pagerprog = DEFAULT_PAGER; +#ifndef WIN32 + pqsignal(SIGPIPE, SIG_IGN); +#endif + return popen(pagerprog, "w"); +#ifdef TIOCGWINSZ + } +#endif + } + + return stdout; +} |