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postgresql/contrib/dbase/dbf2pg.c
Bruce Momjian c2a062b7fe Add dbase conversion utility to /contrib.
2001-05-10 14:41:23 +00:00

810 lines
19 KiB
C
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/* This program reads in an xbase-dbf file and sends 'inserts' to an
PostgreSQL-server with the records in the xbase-file
M. Boekhold (boekhold@cindy.et.tudelft.nl) okt. 1995
oktober 1996: merged sources of dbf2msql.c and dbf2pg.c
oktober 1997: removed msql support
*/
#define HAVE_TERMIOS_H
#define HAVE_ICONV_H
#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#ifdef HAVE_TERMIOS_H
#include <termios.h>
#endif
#ifdef HAVE_ICONV_H
#include <iconv.h>
#endif
#include <libpq-fe.h>
#include "dbf.h"
int verbose = 0, upper = 0, lower = 0, create = 0, fieldlow = 0;
int del = 0;
unsigned int begin = 0, end = 0;
unsigned int t_block = 0;
#ifdef HAVE_ICONV_H
char *charset_from=NULL;
char *charset_to="ISO-8859-1";
iconv_t iconv_d;
char convert_charset_buff[8192];
#endif
char *host = NULL;
char *dbase = "test";
char *table = "test";
char *username = NULL;
char *password = NULL;
char *subarg = NULL;
char escape_buff[8192];
void do_substitute(char *subarg, dbhead *dbh);
inline void strtoupper(char *string);
inline void strtolower(char *string);
void do_create(PGconn *, char*, dbhead*);
void do_inserts(PGconn *, char*, dbhead*);
int check_table(PGconn *, char*);
char *Escape(char*);
#ifdef HAVE_ICONV_H
char *convert_charset(char *string);
#endif
void usage(void);
unsigned int isinteger(char *);
char *simple_prompt(const char *prompt, int maxlen, int echo);
unsigned int isinteger(char *buff) {
char *i=buff;
while (*i != '\0') {
if (i==buff)
if ((*i == '-') ||
(*i == '+')) {
i++; continue;
}
if (!isdigit((int)*i)) return 0;
i++;
}
return 1;
}
inline void strtoupper(char *string) {
while(*string != '\0') {
*string = toupper(*string);
string++;
}
}
inline void strtolower(char *string) {
while(*string != '\0') {
*string = tolower(*string);
string++;
}
}
/* FIXME: should this check for overflow? */
char *Escape(char *string) {
char *foo, *bar;
foo = escape_buff;
bar = string;
while (*bar != '\0') {
if ((*bar == '\t') ||
(*bar == '\n') ||
(*bar == '\\')) {
*foo++ = '\\';
}
*foo++ = *bar++;
}
*foo = '\0';
return escape_buff;
}
#ifdef HAVE_ICONV_H
char *convert_charset(char *string) {
size_t in_size, out_size, nconv;
char *in_ptr,*out_ptr;
in_size=strlen(string)+1;
out_size=sizeof(convert_charset_buff);
in_ptr=string;
out_ptr=convert_charset_buff;
iconv(iconv_d, NULL, &in_size, &out_ptr, &out_size); /* necessary to reset state information */
while(in_size>0)
{
nconv = iconv(iconv_d, &in_ptr, &in_size, &out_ptr, &out_size);
if(nconv == (size_t) -1)
{
printf("WARNING: cannot convert charset of string \"%s\".\n",
string);
strcpy(convert_charset_buff,string);
return convert_charset_buff;
}
}
*out_ptr = 0; /* terminate output string */
return convert_charset_buff;
}
#endif
int check_table(PGconn *conn, char *table) {
char *q = "select relname from pg_class where "
"relkind='r' and relname !~* '^pg'";
PGresult *res;
int i = 0;
if (!(res = PQexec(conn, q))) {
printf("%s\n", PQerrorMessage(conn));
return 0;
}
for (i = 0; i < PQntuples(res); i++) {
if (!strcmp(table, PQgetvalue(res, i, PQfnumber(res, "relname")))) {
return 1;
}
}
return 0;
}
void usage(void){
printf("\
dbf2pg
usage: dbf2pg [-u | -l] [-h hostname] [-W] [-U username]
[-B transaction_size] [-F charset_from [-T charset_to]]
[-s oldname=newname[,oldname=newname[...]]] [-d dbase]
[-t table] [-c | -D] [-f] [-v[v]] dbf-file\n");
}
/* patch submitted by Jeffrey Y. Sue <jysue@aloha.net> */
/* Provides functionallity for substituting dBase-fieldnames for others */
/* Mainly for avoiding conflicts between fieldnames and SQL-reserved */
/* keywords */
void do_substitute(char *subarg, dbhead *dbh)
{
/* NOTE: subarg is modified in this function */
int i,bad;
char *p,*oldname,*newname;
if (!subarg) {
return;
}
if (verbose>1) {
printf("Substituting new field names\n");
}
/* use strstr instead of strtok because of possible empty tokens */
oldname = subarg;
while (oldname && strlen(oldname) && (p=strstr(oldname,"=")) ) {
*p = '\0'; /* mark end of oldname */
newname = ++p; /* point past \0 of oldname */
if (strlen(newname)) { /* if not an empty string */
p = strstr(newname,",");
if (p) {
*p = '\0'; /* mark end of newname */
p++; /* point past where the comma was */
}
}
if (strlen(newname)>=DBF_NAMELEN) {
printf("Truncating new field name %s to %d chars\n",
newname,DBF_NAMELEN-1);
newname[DBF_NAMELEN-1] = '\0';
}
bad = 1;
for (i=0;i<dbh->db_nfields;i++) {
if (strcmp(dbh->db_fields[i].db_name,oldname)==0) {
bad = 0;
strcpy(dbh->db_fields[i].db_name,newname);
if (verbose>1) {
printf("Substitute old:%s new:%s\n",
oldname,newname);
}
break;
}
}
if (bad) {
printf("Warning: old field name %s not found\n",
oldname);
}
oldname = p;
}
} /* do_substitute */
void do_create(PGconn *conn, char *table, dbhead *dbh) {
char *query;
char t[20];
int i, length;
PGresult *res;
if (verbose > 1) {
printf("Building CREATE-clause\n");
}
if (!(query = (char *)malloc(
(dbh->db_nfields * 40) + 29 + strlen(table)))) {
fprintf(stderr, "Memory allocation error in function do_create\n");
PQfinish(conn);
close(dbh->db_fd);
free(dbh);
exit(1);
}
sprintf(query, "CREATE TABLE %s (", table);
length = strlen(query);
for ( i = 0; i < dbh->db_nfields; i++) {
if (!strlen(dbh->db_fields[i].db_name)) {
continue;
/* skip field if length of name == 0 */
}
if ((strlen(query) != length)) {
strcat(query, ",");
}
if (fieldlow)
strtolower(dbh->db_fields[i].db_name);
strcat(query, dbh->db_fields[i].db_name);
switch(dbh->db_fields[i].db_type) {
case 'D':
strcat(query, " date");
break;
case 'C':
if (dbh->db_fields[i].db_flen > 1) {
strcat(query, " varchar");
sprintf(t, "(%d)",
dbh->db_fields[i].db_flen);
strcat(query, t);
} else {
strcat(query, " char");
}
break;
case 'N':
if (dbh->db_fields[i].db_dec != 0) {
strcat(query, " real");
} else {
strcat(query, " int");
}
break;
case 'L':
strcat(query, " char");
break;
}
}
strcat(query, ")");
if (verbose > 1) {
printf("Sending create-clause\n");
printf("%s\n", query);
}
if ((res = PQexec(conn, query)) == NULL) {
fprintf(stderr, "Error creating table!\n");
fprintf(stderr, "Detailed report: %s\n", PQerrorMessage(conn));
close(dbh->db_fd);
free(dbh);
free(query);
PQfinish(conn);
exit(1);
}
PQclear(res);
free(query);
}
/* FIXME: can be optimized to not use strcat, but it is worth the effort? */
void do_inserts(PGconn *conn, char *table, dbhead *dbh) {
PGresult *res;
field *fields;
int i, h, result;
char *query, *foo;
char pgdate[10];
if (verbose > 1) {
printf("Inserting records\n");
}
h = 2; /* 2 because of terminating \n\0 */
for ( i = 0 ; i < dbh->db_nfields ; i++ ) {
h += dbh->db_fields[i].db_flen > 2 ?
dbh->db_fields[i].db_flen :
2; /* account for possible NULL values (\N) */
h += 1; /* the delimiter */
}
/* make sure we can build the COPY query, note that we don't need to just
add this value, since the COPY query is a separate query (see below) */
if (h < 17+strlen(table)) h = 17+strlen(table);
if (!(query = (char *)malloc(h))) {
PQfinish(conn);
fprintf(stderr,
"Memory allocation error in function do_inserts (query)\n");
close(dbh->db_fd);
free(dbh);
exit(1);
}
if ((fields = dbf_build_record(dbh)) == (field *)DBF_ERROR) {
fprintf(stderr,
"Couldn't allocate memory for record in do_insert\n");
PQfinish(conn);
free(query);
dbf_close(dbh);
exit(1);
}
if (end == 0) /* "end" is a user option, if not specified, */
end = dbh->db_records; /* then all records are processed. */
if (t_block == 0) /* user not specified transaction block size */
t_block = end-begin; /* then we set it to be the full data */
for (i = begin; i < end; i++) {
/* we need to start a new transaction and COPY statement */
if (((i-begin) % t_block) == 0) {
if (verbose > 1)
fprintf(stderr, "Transaction: START\n");
res = PQexec(conn, "BEGIN");
if (res == NULL) {
fprintf(stderr, "Error starting transaction!\n");
fprintf(stderr, "Detailed report: %s\n", PQerrorMessage(conn));
exit(1);
}
sprintf(query, "COPY %s FROM stdin", table);
res = PQexec(conn, query);
if (res == NULL) {
fprintf(stderr, "Error starting COPY!\n");
fprintf(stderr, "Detailed report: %s\n", PQerrorMessage(conn));
exit(1);
}
}
/* build line and submit */
result = dbf_get_record(dbh, fields, i);
if (result == DBF_VALID) {
query[0] = '\0';
for (h = 0; h < dbh->db_nfields; h++) {
if (!strlen(fields[h].db_name)) {
continue;
}
if (h!=0) /* not for the first field! */
strcat(query, "\t"); /* COPY statement field separator */
if (upper) {
strtoupper(fields[h].db_contents);
}
if (lower) {
strtolower(fields[h].db_contents);
}
foo = fields[h].db_contents;
#ifdef HAVE_ICONV_H
if(charset_from)
foo = convert_charset(foo);
#endif
foo = Escape(foo);
/* handle the date first - liuk */
if(fields[h].db_type=='D') {
if((strlen(foo)==8) && isinteger(foo)) {
sprintf(pgdate,"%c%c%c%c-%c%c-%c%c",
foo[0],foo[1],foo[2],foo[3],
foo[4],foo[5],foo[6],foo[7]);
strcat(query,pgdate);
} else {
/* empty field must be inserted as NULL value in this
way */
strcat(query,"\\N");
}
}
else if ((fields[h].db_type == 'N') &&
(fields[h].db_dec == 0)){
if (isinteger(foo)) {
strcat(query, foo);
} else {
strcat(query, "\\N");
if (verbose)
fprintf(stderr, "Illegal numeric value found "
"in record %d, field \"%s\"\n",
i, fields[h].db_name);
}
} else {
strcat(query, foo); /* must be character */
}
}
strcat(query, "\n");
if ((verbose > 1) && (( i % 100) == 0)) {/* Only show every 100 */
printf("Inserting record %d\n", i); /* records. */
}
PQputline(conn, query);
}
/* we need to end this copy and transaction */
if (((i-begin) % t_block) == t_block-1) {
if (verbose > 1)
fprintf(stderr, "Transaction: END\n");
PQputline(conn, "\\.\n");
if (PQendcopy(conn) != 0) {
fprintf(stderr, "Something went wrong while copying. Check "
"your tables!\n");
exit(1);
}
res = PQexec(conn, "END");
if (res == NULL) {
fprintf(stderr, "Error committing work!\n");
fprintf(stderr, "Detailed report: %s\n", PQerrorMessage(conn));
exit(1);
}
}
}
/* last row copied in, end copy and transaction */
/* remember, i is now 1 greater then when we left the loop */
if (((i-begin) % t_block) != 0) {
if (verbose > 1)
fprintf(stderr, "Transaction: END\n");
PQputline(conn, "\\.\n");
if (PQendcopy(conn) != 0) {
fprintf(stderr, "Something went wrong while copying. Check "
"your tables!\n");
}
res = PQexec(conn, "END");
if (res == NULL) {
fprintf(stderr, "Error committing work!\n");
fprintf(stderr, "Detailed report: %s\n", PQerrorMessage(conn));
exit(1);
}
}
dbf_free_record(dbh, fields);
free(query);
}
/*
* This is from Postgres 7.0.3 source tarball, utility program PSQL.
*
* simple_prompt
*
* Generalized function especially intended for reading in usernames and
* password interactively. Reads from stdin.
*
* prompt: The prompt to print
* maxlen: How many characters to accept
* echo: Set to false if you want to hide what is entered (for passwords)
*
* Returns a malloc()'ed string with the input (w/o trailing newline).
*/
static int prompt_state;
char *
simple_prompt(const char *prompt, int maxlen, int echo)
{
int length;
char *destination;
#ifdef HAVE_TERMIOS_H
struct termios t_orig,
t;
#endif
destination = (char *) malloc(maxlen + 2);
if (!destination)
return NULL;
if (prompt)
fputs(prompt, stderr);
prompt_state = 1;
#ifdef HAVE_TERMIOS_H
if (!echo)
{
tcgetattr(0, &t);
t_orig = t;
t.c_lflag &= ~ECHO;
tcsetattr(0, TCSADRAIN, &t);
}
#endif
fgets(destination, maxlen, stdin);
#ifdef HAVE_TERMIOS_H
if (!echo)
{
tcsetattr(0, TCSADRAIN, &t_orig);
puts("");
}
#endif
prompt_state = 0;
length = strlen(destination);
if (length > 0 && destination[length - 1] != '\n')
{
/* eat rest of the line */
char buf[512];
do
{
fgets(buf, 512, stdin);
} while (buf[strlen(buf) - 1] != '\n');
}
if (length > 0 && destination[length - 1] == '\n')
/* remove trailing newline */
destination[length - 1] = '\0';
return destination;
}
int main(int argc, char **argv)
{
PGconn *conn;
int i;
extern int optind;
extern char *optarg;
char *query;
dbhead *dbh;
while ((i = getopt(argc, argv, "DWflucvh:b:e:d:t:s:B:U:F:T:")) != EOF) {
switch (i) {
case 'D':
if (create) {
usage();
printf("Can't use -c and -D at the same time!\n");
exit(1);
}
del = 1;
break;
case 'W':
password=simple_prompt("Password: ",100,0);
break;
case 'f':
fieldlow=1;
break;
case 'v':
verbose++;
break;
case 'c':
if (del) {
usage();
printf("Can't use -c and -D at the same time!\n");
exit(1);
}
create=1;
break;
case 'l':
lower=1;
break;
case 'u':
if (lower) {
usage();
printf("Can't use -u and -l at the same time!\n");
exit(1);
}
upper=1;
break;
case 'b':
begin = atoi(optarg);
break;
case 'e':
end = atoi(optarg);
break;
case 'h':
host = (char *)strdup(optarg);
break;
case 'd':
dbase = (char *)strdup(optarg);
break;
case 't':
table = (char *)strdup(optarg);
break;
case 's':
subarg = (char *)strdup(optarg);
break;
case 'B':
t_block = atoi(optarg);
break;
case 'U':
username = (char *)strdup(optarg);
break;
case 'F':
charset_from = (char *)strdup(optarg);
break;
case 'T':
charset_to = (char *)strdup(optarg);
break;
case ':':
usage();
printf("missing argument!\n");
exit(1);
break;
case '?':
usage();
/* FIXME: Ivan thinks this is bad: printf("unknown argument: %s\n", argv[0]); */
exit(1);
break;
default:
break;
}
}
argc -= optind;
argv = &argv[optind];
if (argc != 1) {
usage();
if(username)
free(username);
if(password)
free(password);
exit(1);
}
#ifdef HAVE_ICONV_H
if(charset_from)
{
if(verbose>1)
printf("Setting conversion from charset \"%s\" to \"%s\".\n",
charset_from,charset_to);
iconv_d = iconv_open(charset_to,charset_from);
if(iconv_d == (iconv_t) -1)
{
printf("Cannot convert from charset \"%s\" to charset \"%s\".\n",
charset_from,charset_to);
exit(1);
}
}
#endif
if (verbose > 1) {
printf("Opening dbf-file\n");
}
if ((dbh = dbf_open(argv[0], O_RDONLY)) == (dbhead *)-1) {
fprintf(stderr, "Couldn't open xbase-file %s\n", argv[0]);
if(username)
free(username);
if(password)
free(password);
if(charset_from)
iconv_close(iconv_d);
exit(1);
}
if (fieldlow)
for ( i = 0 ; i < dbh->db_nfields ; i++ )
strtolower(dbh->db_fields[i].db_name);
if (verbose) {
printf("dbf-file: %s, PG-dbase: %s, PG-table: %s\n", argv[0],
dbase,
table);
printf("Number of records: %ld\n", dbh->db_records);
printf("NAME:\t\tLENGTH:\t\tTYPE:\n");
printf("-------------------------------------\n");
for (i = 0; i < dbh->db_nfields ; i++) {
printf("%-12s\t%7d\t\t%5c\n",dbh->db_fields[i].db_name,
dbh->db_fields[i].db_flen,
dbh->db_fields[i].db_type);
}
}
if (verbose > 1) {
printf("Making connection to PG-server\n");
}
conn = PQsetdbLogin(host,NULL,NULL,NULL, dbase, username, password);
if (PQstatus(conn) != CONNECTION_OK) {
fprintf(stderr, "Couldn't get a connection with the ");
fprintf(stderr, "designated host!\n");
fprintf(stderr, "Detailed report: %s\n", PQerrorMessage(conn));
close(dbh->db_fd);
free(dbh);
if(username)
free(username);
if(password)
free(password);
if(charset_from)
iconv_close(iconv_d);
exit(1);
}
/* Substitute field names */
do_substitute(subarg, dbh);
/* create table if specified, else check if target table exists */
if (!create) {
if (!check_table(conn, table)) {
printf("Table does not exist!\n");
if(username)
free(username);
if(password)
free(password);
if(charset_from)
iconv_close(iconv_d);
exit(1);
}
if (del) {
if (!(query = (char *)malloc(13 + strlen(table)))) {
printf("Memory-allocation error in main (delete)!\n");
close(dbh->db_fd);
free(dbh);
PQfinish(conn);
if(username)
free(username);
if(password)
free(password);
if(charset_from)
iconv_close(iconv_d);
exit(1);
}
if (verbose > 1) {
printf("Deleting from original table\n");
}
sprintf(query, "DELETE FROM %s", table);
PQexec(conn, query);
free(query);
}
} else {
if (!(query = (char *)malloc(12 + strlen(table)))) {
printf("Memory-allocation error in main (drop)!\n");
close(dbh->db_fd);
free(dbh);
PQfinish(conn);
if(username)
free(username);
if(password)
free(password);
if(charset_from)
iconv_close(iconv_d);
exit(1);
}
if (verbose > 1) {
printf("Dropping original table (if one exists)\n");
}
sprintf(query, "DROP TABLE %s", table);
PQexec(conn, query);
free(query);
/* Build a CREATE-clause
*/
do_create(conn, table, dbh);
}
/* Build an INSERT-clause
*/
PQexec(conn, "SET DATESTYLE TO 'ISO';");
do_inserts(conn, table, dbh);
if (verbose > 1) {
printf("Closing up....\n");
}
close(dbh->db_fd);
free(dbh);
PQfinish(conn);
if(username)
free(username);
if(password)
free(password);
if(charset_from)
iconv_close(iconv_d);
exit(0);
}
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