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Page \h output and centralize psql paging code in PageOutput().

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This commit is contained in:
Bruce Momjian
2002-10-23 19:23:57 +00:00
parent 30963fc200
commit 641b658c26
6 changed files with 86 additions and 99 deletions
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45
src/bin/psql/common.c
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@@ -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;
}