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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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72
src/bin/psql/help.c
View File

@ -3,9 +3,10 @@
*
* Copyright 2000 by PostgreSQL Global Development Group
*
* $Header: /cvsroot/pgsql/src/bin/psql/help.c,v 1.58 2002/10/18 22:05:36 petere Exp $
* $Header: /cvsroot/pgsql/src/bin/psql/help.c,v 1.59 2002/10/23 19:23:56 momjian Exp $
*/
#include "postgres_fe.h"
#include "common.h"
#include "print.h"
#include "help.h"
@ -161,48 +162,11 @@ struct winsize
void
slashUsage(bool pager)
{
FILE *output,
*pagerfd = NULL;
FILE *output;
/* check whether we need / can / are supposed to use pager */
if (pager
#ifndef WIN32
&&
isatty(fileno(stdin)) &&
isatty(fileno(stdout))
#endif
)
{
const char *pagerprog;
output = PageOutput(50, pager);
#ifdef TIOCGWINSZ
int result;
struct winsize screen_size;
result = ioctl(fileno(stdout), TIOCGWINSZ, &screen_size);
if (result == -1 || 50 > screen_size.ws_row)
{
#endif
pagerprog = getenv("PAGER");
if (!pagerprog)
pagerprog = DEFAULT_PAGER;
pagerfd = popen(pagerprog, "w");
#ifdef TIOCGWINSZ
}
#endif
}
if (pagerfd)
{
output = pagerfd;
#ifndef WIN32
pqsignal(SIGPIPE, SIG_IGN);
#endif
}
else
output = stdout;
/* if you add/remove a line here, change the row test above */
/* if you add/remove a line here, change the row count above */
/*
* if this " is the start of the string then it ought to end there to
@ -262,9 +226,9 @@ slashUsage(bool pager)
fprintf(output, _(" \\z [PATTERN] list table access privileges (same as \\dp)\n"));
fprintf(output, _(" \\! [COMMAND] execute command in shell or start interactive shell\n"));
if (pagerfd)
if (output != stdout)
{
pclose(pagerfd);
pclose(output);
#ifndef WIN32
pqsignal(SIGPIPE, SIG_DFL);
#endif
@ -278,7 +242,7 @@ slashUsage(bool pager)
*
*/
void
helpSQL(const char *topic)
helpSQL(const char *topic, bool pager)
{
#define VALUE_OR_NULL(a) ((a) ? (a) : "")
@ -286,21 +250,31 @@ helpSQL(const char *topic)
{
int i;
int items_per_column = (QL_HELP_COUNT + 2) / 3;
FILE *output;
puts(_("Available help:"));
output = PageOutput(items_per_column, pager);
fputs(_("Available help:\n"), output);
for (i = 0; i < items_per_column; i++)
{
printf(" %-26s%-26s",
fprintf(output, " %-26s%-26s",
VALUE_OR_NULL(QL_HELP[i].cmd),
VALUE_OR_NULL(QL_HELP[i + items_per_column].cmd));
if (i + 2 * items_per_column < QL_HELP_COUNT)
printf("%-26s",
fprintf(output, "%-26s",
VALUE_OR_NULL(QL_HELP[i + 2 * items_per_column].cmd));
fputc('\n', stdout);
fputc('\n', output);
}
/* Only close if we used the pager */
if (output != stdout)
{
pclose(output);
#ifndef WIN32
pqsignal(SIGPIPE, SIG_DFL);
#endif
}
}
else
{
int i;