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/*-------------------------------------------------------------------------
*
* common.c
* Common support routines for bin/scripts/
*
*
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/bin/scripts/common.c,v 1.23 2006/10/03 21:45:20 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres_fe.h"
#include <pwd.h>
#include <unistd.h>
#include "common.h"
#ifndef HAVE_INT_OPTRESET
int optreset;
#endif
/*
* Returns the current user name.
*/
const char *
get_user_name(const char *progname)
{
#ifndef WIN32
struct passwd *pw;
pw = getpwuid(geteuid());
if (!pw)
{
fprintf(stderr, _("%s: could not obtain information about current user: %s\n"),
progname, strerror(errno));
exit(1);
}
return pw->pw_name;
#else
static char username[128]; /* remains after function exit */
DWORD len = sizeof(username) - 1;
if (!GetUserName(username, &len))
{
fprintf(stderr, _("%s: could not get current user name: %s\n"),
progname, strerror(errno));
exit(1);
}
return username;
#endif
}
/*
* Provide strictly harmonized handling of --help and --version
* options.
*/
void
handle_help_version_opts(int argc, char *argv[],
const char *fixed_progname, help_handler hlp)
{
if (argc > 1)
{
if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") == 0)
{
hlp(get_progname(argv[0]));
exit(0);
}
if (strcmp(argv[1], "--version") == 0 || strcmp(argv[1], "-V") == 0)
{
printf("%s (PostgreSQL) " PG_VERSION "\n", fixed_progname);
exit(0);
}
}
}
/*
* Make a database connection with the given parameters. An
* interactive password prompt is automatically issued if required.
*/
PGconn *
connectDatabase(const char *dbname, const char *pghost, const char *pgport,
const char *pguser, bool require_password,
const char *progname)
{
PGconn *conn;
char *password = NULL;
bool need_pass = false;
if (require_password)
password = simple_prompt("Password: ", 100, false);
/*
* Start the connection. Loop until we have a password if requested by
* backend.
*/
do
{
need_pass = false;
conn = PQsetdbLogin(pghost, pgport, NULL, NULL, dbname, pguser, password);
if (!conn)
{
fprintf(stderr, _("%s: could not connect to database %s\n"),
progname, dbname);
exit(1);
}
if (PQstatus(conn) == CONNECTION_BAD &&
strcmp(PQerrorMessage(conn), PQnoPasswordSupplied) == 0 &&
!feof(stdin))
{
PQfinish(conn);
need_pass = true;
free(password);
password = NULL;
password = simple_prompt("Password: ", 100, false);
}
} while (need_pass);
if (password)
free(password);
/* check to see that the backend connection was successfully made */
if (PQstatus(conn) == CONNECTION_BAD)
{
fprintf(stderr, _("%s: could not connect to database %s: %s"),
progname, dbname, PQerrorMessage(conn));
exit(1);
}
return conn;
}
/*
* Run a query, return the results, exit program on failure.
*/
PGresult *
executeQuery(PGconn *conn, const char *query, const char *progname, bool echo)
{
PGresult *res;
if (echo)
printf("%s\n", query);
res = PQexec(conn, query);
if (!res ||
PQresultStatus(res) != PGRES_TUPLES_OK)
{
fprintf(stderr, _("%s: query failed: %s"),
progname, PQerrorMessage(conn));
fprintf(stderr, _("%s: query was: %s\n"),
progname, query);
PQfinish(conn);
exit(1);
}
return res;
}
/*
* As above for a SQL command (which returns nothing).
*/
void
executeCommand(PGconn *conn, const char *query,
const char *progname, bool echo)
{
PGresult *res;
if (echo)
printf("%s\n", query);
res = PQexec(conn, query);
if (!res ||
PQresultStatus(res) != PGRES_COMMAND_OK)
{
fprintf(stderr, _("%s: query failed: %s"),
progname, PQerrorMessage(conn));
fprintf(stderr, _("%s: query was: %s\n"),
progname, query);
PQfinish(conn);
exit(1);
}
PQclear(res);
}
/*
* Check yes/no answer in a localized way. 1=yes, 0=no, -1=neither.
*/
/* translator: abbreviation for "yes" */
#define PG_YESLETTER gettext_noop("y")
/* translator: abbreviation for "no" */
#define PG_NOLETTER gettext_noop("n")
bool
yesno_prompt(const char *question)
{
char prompt[256];
/* translator: This is a question followed by the translated options for "yes" and "no". */
snprintf(prompt, sizeof(prompt), _("%s (%s/%s) "),
_(question), _(PG_YESLETTER), _(PG_NOLETTER));
for (;;)
{
char *resp;
resp = simple_prompt(prompt, 1, true);
if (strcmp(resp, _(PG_YESLETTER)) == 0)
{
free(resp);
return true;
}
else if (strcmp(resp, _(PG_NOLETTER)) == 0)
{
free(resp);
return false;
}
free(resp);
printf(_("Please answer \"%s\" or \"%s\".\n"),
_(PG_YESLETTER), _(PG_NOLETTER));
}
}
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