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/*
* psql - the PostgreSQL interactive terminal
*
* Copyright 2000 by PostgreSQL Global Development Group
*
* $Header: /cvsroot/pgsql/src/bin/psql/input.c,v 1.18 2001/10/25 05:49:54 momjian Exp $
*/
#include "postgres_fe.h"
#include "input.h"
#include <errno.h>
#include "pqexpbuffer.h"
#include "settings.h"
#include "tab-complete.h"
#include "common.h"
/* Runtime options for turning off readline and history */
/* (of course there is no runtime command for doing that :) */
#ifdef USE_READLINE
static bool useReadline;
#endif
#ifdef USE_HISTORY
static bool useHistory;
#endif
#ifdef HAVE_ATEXIT
static void finishInput(void);
#else
/* designed for use with on_exit() */
static void finishInput(int, void *);
#endif
/*
* gets_interactive()
*
* Gets a line of interactive input, using readline of desired.
* The result is malloced.
*/
char *
gets_interactive(char *prompt)
{
char *s;
#ifdef USE_HISTORY
const char *var;
static char *prev_hist = NULL;
#endif
#ifdef USE_READLINE
if (useReadline)
s = readline(prompt);
else
{
#endif
fputs(prompt, stdout);
fflush(stdout);
s = gets_fromFile(stdin);
#ifdef USE_READLINE
}
#endif
#ifdef USE_HISTORY
if (useHistory && s && s[0] != '\0')
{
var = GetVariable(pset.vars, "HISTCONTROL");
if (!var || (var
&& !((strcmp(var, "ignorespace") == 0 || strcmp(var, "ignoreboth") == 0) && s[0] == ' ')
&& !((strcmp(var, "ignoredups") == 0 || strcmp(var, "ignoreboth") == 0) && prev_hist && strcmp(s, prev_hist) == 0)
))
{
free(prev_hist);
prev_hist = strdup(s);
add_history(s);
}
}
#endif
return s;
}
/*
* gets_fromFile
*
* Gets a line of noninteractive input from a file (which could be stdin).
*/
char *
gets_fromFile(FILE *source)
{
PQExpBufferData buffer;
char line[1024];
initPQExpBuffer(&buffer);
while (fgets(line, sizeof(line), source) != NULL)
{
appendPQExpBufferStr(&buffer, line);
if (buffer.data[buffer.len - 1] == '\n')
{
buffer.data[buffer.len - 1] = '\0';
return buffer.data;
}
}
if (buffer.len > 0)
return buffer.data; /* EOF after reading some bufferload(s) */
/* EOF, so return null */
termPQExpBuffer(&buffer);
return NULL;
}
/*
* Put any startup stuff related to input in here. It's good to maintain
* abstraction this way.
*
* The only "flag" right now is 1 for use readline & history.
*/
void
initializeInput(int flags)
{
#ifdef USE_READLINE
if (flags == 1)
{
useReadline = true;
initialize_readline();
}
#endif
#ifdef USE_HISTORY
if (flags == 1)
{
const char *home;
useHistory = true;
SetVariable(pset.vars, "HISTSIZE", "500");
using_history();
home = getenv("HOME");
if (home)
{
char *psql_history = (char *) malloc(strlen(home) + 20);
if (psql_history)
{
sprintf(psql_history, "%s/.psql_history", home);
read_history(psql_history);
free(psql_history);
}
}
}
#endif
#ifdef HAVE_ATEXIT
atexit(finishInput);
#else
on_exit(finishInput, NULL);
#endif
}
bool
saveHistory(char *fname)
{
#ifdef USE_HISTORY
if (useHistory && fname)
{
if (write_history(fname) != 0)
{
psql_error("could not save history to %s: %s\n", fname, strerror(errno));
return false;
}
return true;
}
else
return false;
#else
return false;
#endif
}
static void
#ifdef HAVE_ATEXIT
finishInput(void)
#else
finishInput(int exitstatus, void *arg)
#endif
{
#ifdef USE_HISTORY
if (useHistory)
{
char *home;
char *psql_history;
home = getenv("HOME");
if (home)
{
psql_history = (char *) malloc(strlen(home) + 20);
if (psql_history)
{
const char *var = GetVariable(pset.vars, "HISTSIZE");
if (var)
stifle_history(atoi(var));
sprintf(psql_history, "%s/.psql_history", home);
write_history(psql_history);
free(psql_history);
}
}
}
#endif
}
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