#include <stdio.h>
#ifndef VMS
#include <sys/file.h>
#include <ndbm.h>
#else
#include "file.h"
#include "ndbm.h"
#endif
#include <ctype.h>
/***************************************************************************\
** **
** Function name: getopt() **
** Author: Henry Spencer, UofT **
** Coding date: 84/04/28 **
** **
** Description: **
** **
** Parses argv[] for arguments. **
** Works with Whitesmith's C compiler. **
** **
** Inputs - The number of arguments **
** - The base address of the array of arguments **
** - A string listing the valid options (':' indicates an **
** argument to the preceding option is required, a ';' **
** indicates an argument to the preceding option is optional) **
** **
** Outputs - Returns the next option character, **
** '?' for non '-' arguments **
** or ':' when there is no more arguments. **
** **
** Side Effects + The argument to an option is pointed to by 'optarg' **
** **
*****************************************************************************
** **
** REVISION HISTORY: **
** **
** DATE NAME DESCRIPTION **
** YY/MM/DD ------------------ ------------------------------------ **
** 88/10/20 Janick Bergeron Returns '?' on unamed arguments **
** returns '!' on unknown options **
** and 'EOF' only when exhausted. **
** 88/11/18 Janick Bergeron Return ':' when no more arguments **
** 89/08/11 Janick Bergeron Optional optarg when ';' in optstring **
** **
\***************************************************************************/
char *optarg; /* Global argument pointer. */
#ifdef VMS
#define index strchr
#endif
char
getopt(int argc, char **argv, char *optstring)
{
register int c;
register char *place;
extern char *index();
static int optind = 0;
static char *scan = NULL;
optarg = NULL;
if (scan == NULL || *scan == '\0') {
if (optind == 0)
optind++;
if (optind >= argc)
return ':';
optarg = place = argv[optind++];
if (place[0] != '-' || place[1] == '\0')
return '?';
if (place[1] == '-' && place[2] == '\0')
return '?';
scan = place + 1;
}
c = *scan++;
place = index(optstring, c);
if (place == NULL || c == ':' || c == ';') {
(void) fprintf(stderr, "%s: unknown option %c\n", argv[0], c);
scan = NULL;
return '!';
}
if (*++place == ':') {
if (*scan != '\0') {
optarg = scan;
scan = NULL;
}
else {
if (optind >= argc) {
(void) fprintf(stderr, "%s: %c requires an argument\n",
argv[0], c);
return '!';
}
optarg = argv[optind];
optind++;
}
}
else if (*place == ';') {
if (*scan != '\0') {
optarg = scan;
scan = NULL;
}
else {
if (optind >= argc || *argv[optind] == '-')
optarg = NULL;
else {
optarg = argv[optind];
optind++;
}
}
}
return c;
}
void
print_datum(datum db)
{
int i;
putchar('"');
for (i = 0; i < db.dsize; i++) {
if (isprint((unsigned char)db.dptr[i]))
putchar(db.dptr[i]);
else {
putchar('\\');
putchar('0' + ((db.dptr[i] >> 6) & 0x07));
putchar('0' + ((db.dptr[i] >> 3) & 0x07));
putchar('0' + (db.dptr[i] & 0x07));
}
}
putchar('"');
}
datum
read_datum(char *s)
{
datum db;
char *p;
int i;
db.dsize = 0;
db.dptr = (char *) malloc(strlen(s) * sizeof(char));
if (!db.dptr)
oops("cannot get memory");
for (p = db.dptr; *s != '\0'; p++, db.dsize++, s++) {
if (*s == '\\') {
if (*++s == 'n')
*p = '\n';
else if (*s == 'r')
*p = '\r';
else if (*s == 'f')
*p = '\f';
else if (*s == 't')
*p = '\t';
else if (isdigit((unsigned char)*s)
&& isdigit((unsigned char)*(s + 1))
&& isdigit((unsigned char)*(s + 2)))
{
i = (*s++ - '0') << 6;
i |= (*s++ - '0') << 3;
i |= *s - '0';
*p = i;
}
else if (*s == '0')
*p = '\0';
else
*p = *s;
}
else
*p = *s;
}
return db;
}
char *
key2s(datum db)
{
char *buf;
char *p1, *p2;
buf = (char *) malloc((db.dsize + 1) * sizeof(char));
if (!buf)
oops("cannot get memory");
for (p1 = buf, p2 = db.dptr; *p2 != '\0'; *p1++ = *p2++);
*p1 = '\0';
return buf;
}
int
main(int argc, char **argv)
{
typedef enum {
YOW, FETCH, STORE, DELETE, SCAN, REGEXP
} commands;
char opt;
int flags;
int giveusage = 0;
int verbose = 0;
commands what = YOW;
char *comarg[3];
int st_flag = DBM_INSERT;
int argn;
DBM *db;
datum key;
datum content;
flags = O_RDWR;
argn = 0;
while ((opt = getopt(argc, argv, "acdfFm:rstvx")) != ':') {
switch (opt) {
case 'a':
what = SCAN;
break;
case 'c':
flags |= O_CREAT;
break;
case 'd':
what = DELETE;
break;
case 'f':
what = FETCH;
break;
case 'F':
what = REGEXP;
break;
case 'm':
flags &= ~(000007);
if (strcmp(optarg, "r") == 0)
flags |= O_RDONLY;
else if (strcmp(optarg, "w") == 0)
flags |= O_WRONLY;
else if (strcmp(optarg, "rw") == 0)
flags |= O_RDWR;
else {
fprintf(stderr, "Invalid mode: \"%s\"\n", optarg);
giveusage = 1;
}
break;
case 'r':
st_flag = DBM_REPLACE;
break;
case 's':
what = STORE;
break;
case 't':
flags |= O_TRUNC;
break;
case 'v':
verbose = 1;
break;
case 'x':
flags |= O_EXCL;
break;
case '!':
giveusage = 1;
break;
case '?':
if (argn < 3)
comarg[argn++] = optarg;
else {
fprintf(stderr, "Too many arguments.\n");
giveusage = 1;
}
break;
}
}
if (giveusage || what == YOW || argn < 1) {
fprintf(stderr, "Usage: %s databse [-m r|w|rw] [-crtx] -a|-d|-f|-F|-s [key [content]]\n", argv[0]);
exit(-1);
}
if ((db = dbm_open(comarg[0], flags, 0777)) == NULL) {
fprintf(stderr, "Error opening database \"%s\"\n", comarg[0]);
exit(-1);
}
if (argn > 1)
key = read_datum(comarg[1]);
if (argn > 2)
content = read_datum(comarg[2]);
switch (what) {
case SCAN:
key = dbm_firstkey(db);
if (dbm_error(db)) {
fprintf(stderr, "Error when fetching first key\n");
goto db_exit;
}
while (key.dptr != NULL) {
content = dbm_fetch(db, key);
if (dbm_error(db)) {
fprintf(stderr, "Error when fetching ");
print_datum(key);
printf("\n");
goto db_exit;
}
print_datum(key);
printf(": ");
print_datum(content);
printf("\n");
if (dbm_error(db)) {
fprintf(stderr, "Error when fetching next key\n");
goto db_exit;
}
key = dbm_nextkey(db);
}
break;
case REGEXP:
if (argn < 2) {
fprintf(stderr, "Missing regular expression.\n");
goto db_exit;
}
if (re_comp(comarg[1])) {
fprintf(stderr, "Invalid regular expression\n");
goto db_exit;
}
key = dbm_firstkey(db);
if (dbm_error(db)) {
fprintf(stderr, "Error when fetching first key\n");
goto db_exit;
}
while (key.dptr != NULL) {
if (re_exec(key2s(key))) {
content = dbm_fetch(db, key);
if (dbm_error(db)) {
fprintf(stderr, "Error when fetching ");
print_datum(key);
printf("\n");
goto db_exit;
}
print_datum(key);
printf(": ");
print_datum(content);
printf("\n");
if (dbm_error(db)) {
fprintf(stderr, "Error when fetching next key\n");
goto db_exit;
}
}
key = dbm_nextkey(db);
}
break;
case FETCH:
if (argn < 2) {
fprintf(stderr, "Missing fetch key.\n");
goto db_exit;
}
content = dbm_fetch(db, key);
if (dbm_error(db)) {
fprintf(stderr, "Error when fetching ");
print_datum(key);
printf("\n");
goto db_exit;
}
if (content.dptr == NULL) {
fprintf(stderr, "Cannot find ");
print_datum(key);
printf("\n");
goto db_exit;
}
print_datum(key);
printf(": ");
print_datum(content);
printf("\n");
break;
case DELETE:
if (argn < 2) {
fprintf(stderr, "Missing delete key.\n");
goto db_exit;
}
if (dbm_delete(db, key) || dbm_error(db)) {
fprintf(stderr, "Error when deleting ");
print_datum(key);
printf("\n");
goto db_exit;
}
if (verbose) {
print_datum(key);
printf(": DELETED\n");
}
break;
case STORE:
if (argn < 3) {
fprintf(stderr, "Missing key and/or content.\n");
goto db_exit;
}
if (dbm_store(db, key, content, st_flag) || dbm_error(db)) {
fprintf(stderr, "Error when storing ");
print_datum(key);
printf("\n");
goto db_exit;
}
if (verbose) {
print_datum(key);
printf(": ");
print_datum(content);
printf(" STORED\n");
}
break;
}
db_exit:
dbm_clearerr(db);
dbm_close(db);
if (dbm_error(db)) {
fprintf(stderr, "Error closing database \"%s\"\n", comarg[0]);
exit(-1);
}
}
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