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I've improved the contributed vacuumlo command, now it behaves like all other
postgres command line utilites e.g. supports -U, -p, -h, -?, -v, password prompt and has a "test mode". In test mode, no large objects are removed, just reported. Mario Weilguni
This commit is contained in:
Bruce Momjian
parent
5b0fb008e7
commit
7f459808de
@ -8,14 +8,20 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/contrib/vacuumlo/vacuumlo.c,v 1.10 2001/09/17 02:30:54 inoue Exp $
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* $Header: /cvsroot/pgsql/contrib/vacuumlo/vacuumlo.c,v 1.11 2002/04/24 02:45:51 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include <pg_config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef HAVE_TERMIOS_H
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#include <termios.h>
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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@ -28,24 +34,163 @@
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#define BUFSIZE 1024
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int vacuumlo(char *, int);
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extern char *optarg;
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extern int optind, opterr, optopt;
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struct _param {
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char *pg_user;
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int pg_prompt;
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char *pg_port;
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char *pg_host;
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int verbose;
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int dry_run;
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};
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int vacuumlo(char *, struct _param *);
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char *simple_prompt(const char *prompt, int , int);
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void usage(void);
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/*
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* simple_prompt
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*
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* Generalized function especially intended for reading in usernames and
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* password interactively. Reads from /dev/tty or stdin/stderr.
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*
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* prompt: The prompt to print
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* maxlen: How many characters to accept
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* echo: Set to 0 if you want to hide what is entered (for passwords)
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*
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* Returns a malloc()'ed string with the input (w/o trailing newline).
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*/
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static int prompt_state = 0;
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char *
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simple_prompt(const char *prompt, int maxlen, int echo)
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{
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int length;
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char *destination;
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FILE *termin,
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*termout;
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#ifdef HAVE_TERMIOS_H
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struct termios t_orig,
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t;
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#endif
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destination = (char *) malloc(maxlen + 2);
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if (!destination)
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return NULL;
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prompt_state = 1; /* disable SIGINT */
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/*
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* Do not try to collapse these into one "w+" mode file. Doesn't work
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* on some platforms (eg, HPUX 10.20).
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*/
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termin = fopen("/dev/tty", "r");
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termout = fopen("/dev/tty", "w");
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if (!termin || !termout)
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{
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if (termin)
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fclose(termin);
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if (termout)
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fclose(termout);
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termin = stdin;
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termout = stderr;
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}
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#ifdef HAVE_TERMIOS_H
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if (!echo)
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{
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tcgetattr(fileno(termin), &t);
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t_orig = t;
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t.c_lflag &= ~ECHO;
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tcsetattr(fileno(termin), TCSAFLUSH, &t);
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}
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#endif
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if (prompt)
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{
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fputs(prompt, termout);
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fflush(termout);
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}
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if (fgets(destination, maxlen, termin) == NULL)
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destination[0] = '\0';
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length = strlen(destination);
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if (length > 0 && destination[length - 1] != '\n')
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{
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/* eat rest of the line */
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char buf[128];
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int buflen;
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do
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{
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if (fgets(buf, sizeof(buf), termin) == NULL)
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break;
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buflen = strlen(buf);
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} while (buflen > 0 && buf[buflen - 1] != '\n');
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}
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if (length > 0 && destination[length - 1] == '\n')
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/* remove trailing newline */
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destination[length - 1] = '\0';
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#ifdef HAVE_TERMIOS_H
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if (!echo)
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{
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tcsetattr(fileno(termin), TCSAFLUSH, &t_orig);
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fputs("\n", termout);
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fflush(termout);
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}
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#endif
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if (termin != stdin)
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{
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fclose(termin);
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fclose(termout);
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}
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prompt_state = 0; /* SIGINT okay again */
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return destination;
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}
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/*
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* This vacuums LOs of one database. It returns 0 on success, -1 on failure.
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*/
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int
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vacuumlo(char *database, int verbose)
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vacuumlo(char *database, struct _param *param)
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{
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PGconn *conn;
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PGresult *res,
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*res2;
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*res2;
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char buf[BUFSIZE];
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int matched;
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int deleted;
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int i;
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int matched;
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int deleted;
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int i;
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char *password = NULL;
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conn = PQsetdb(NULL, NULL, NULL, NULL, database);
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if(param->pg_prompt) {
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password = simple_prompt("Password: ", 32, 0);
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if(!password) {
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fprintf(stderr, "failed to get password\n");
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exit(1);
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}
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}
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conn = PQsetdbLogin( param->pg_host,
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param->pg_port,
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NULL,
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NULL,
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database,
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param->pg_user,
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password
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);
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/* check to see that the backend connection was successfully made */
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if (PQstatus(conn) == CONNECTION_BAD)
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@ -56,8 +201,11 @@ vacuumlo(char *database, int verbose)
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return -1;
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}
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if (verbose)
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if (param->verbose) {
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fprintf(stdout, "Connected to %s\n", database);
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if(param->dry_run)
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fprintf(stdout, "Test run: no large objects will be removed!\n");
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}
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/*
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* First we create and populate the LO temp table
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@ -132,7 +280,7 @@ vacuumlo(char *database, int verbose)
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table = PQgetvalue(res, i, 0);
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field = PQgetvalue(res, i, 1);
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if (verbose)
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if (param->verbose)
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fprintf(stdout, "Checking %s in %s\n", field, table);
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/*
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@ -188,19 +336,22 @@ vacuumlo(char *database, int verbose)
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{
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Oid lo = atooid(PQgetvalue(res, i, 0));
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if (verbose)
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if (param->verbose)
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{
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fprintf(stdout, "\rRemoving lo %6u ", lo);
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fflush(stdout);
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}
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if (lo_unlink(conn, lo) < 0)
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{
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fprintf(stderr, "\nFailed to remove lo %u: ", lo);
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fprintf(stderr, "%s", PQerrorMessage(conn));
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}
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else
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deleted++;
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if(param->dry_run == 0) {
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if (lo_unlink(conn, lo) < 0)
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{
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fprintf(stderr, "\nFailed to remove lo %u: ", lo);
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fprintf(stderr, "%s", PQerrorMessage(conn));
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}
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else
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deleted++;
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} else
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deleted++;
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}
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PQclear(res);
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@ -212,33 +363,95 @@ vacuumlo(char *database, int verbose)
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PQfinish(conn);
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if (verbose)
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fprintf(stdout, "\rRemoved %d large objects from %s.\n",
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deleted, database);
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if (param->verbose)
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fprintf(stdout, "\r%s %d large objects from %s.\n",
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(param->dry_run?"Would remove":"Removed"), deleted, database);
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return 0;
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}
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void
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usage(void) {
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fprintf(stdout, "vacuumlo removes unreferenced large objects from databases\n\n");
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fprintf(stdout, "Usage:\n vacuumlo [options] dbname [dbnames...]\n\n");
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fprintf(stdout, "Options:\n");
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fprintf(stdout, " -v\t\tWrite a lot of output\n");
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fprintf(stdout, " -n\t\tDon't remove any large object, just show what would be done\n");
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fprintf(stdout, " -U username\tUsername to connect as\n");
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fprintf(stdout, " -W\t\tPrompt for password\n");
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fprintf(stdout, " -h hostname\tDatabase server host\n");
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fprintf(stdout, " -p port\tDatabase server port\n");
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fprintf(stdout, " -p port\tDatabase server port\n\n");
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}
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int
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main(int argc, char **argv)
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{
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int verbose = 0;
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int arg;
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int rc = 0;
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struct _param param;
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int c;
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int port;
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if (argc < 2)
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{
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fprintf(stderr, "Usage: %s [-v] database_name [db2 ... dbn]\n",
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argv[0]);
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/* Parameter handling */
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param.pg_user = NULL;
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param.pg_prompt = 0;
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param.pg_host = NULL;
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param.pg_port = 0;
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param.verbose = 0;
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param.dry_run = 0;
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while( 1 ) {
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c = getopt(argc, argv, "?h:U:p:vnW");
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if(c == -1)
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break;
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switch(c) {
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case '?':
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if(optopt == '?') {
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usage();
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exit(0);
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}
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exit(1);
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case ':':
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exit(1);
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case 'v':
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param.verbose = 1;
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break;
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case 'n':
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param.dry_run = 1;
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param.verbose = 1;
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break;
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case 'U':
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param.pg_user = strdup(optarg);
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break;
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case 'W':
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param.pg_prompt = 1;
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break;
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case 'p':
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port = strtol(optarg, NULL, 10);
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if( (port < 1) || (port > 65535)) {
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fprintf(stderr, "[%s]: invalid port number '%s'\n", argv[0], optarg);
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exit(1);
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}
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param.pg_port = strdup(optarg);
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break;
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case 'h':
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param.pg_host = strdup(optarg);
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break;
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}
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}
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/* No database given? Show usage */
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if(optind >= argc-1) {
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fprintf(stderr, "vacuumlo: missing required argument: database name\n");
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fprintf(stderr, "Try 'vacuumlo -?' for help.\n");
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exit(1);
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}
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for (arg = 1; arg < argc; arg++)
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{
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if (strcmp("-v", argv[arg]) == 0)
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verbose = !verbose;
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else
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rc += (vacuumlo(argv[arg], verbose) != 0);
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for(c = optind; c < argc; c++) {
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/* Work on selected database */
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rc += (vacuumlo(argv[c], ¶m) != 0);
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}
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return rc;
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