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prosperon/tools/cdb.c

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/* cdb.c: cdb command line tool
*
* This file is a part of tinycdb package by Michael Tokarev, mjt+cdb@corpit.ru.
* Public domain.
*/
#define _GNU_SOURCE /* #define this even on Windows */
#ifdef _WIN32 /* by the way, how about win64? */
# include <io.h>
# include <malloc.h>
/* This pragma suppresses snippy VC warnings for POSIX functions like read() */
# pragma warning(disable: 4996)
#else
# include <unistd.h>
# include <signal.h>
#endif
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/stat.h>
#include "cdb.h"
#ifndef EPROTO
# define EPROTO EINVAL
#endif
#ifdef __GLIBC__
# define HAVE_PROGRAM_INVOCATION_SHORT_NAME
#endif
#ifdef HAVE_PROGRAM_INVOCATION_SHORT_NAME
# define progname program_invocation_short_name
#else
static char *progname;
#endif
#ifndef O_NOFOLLOW
# define O_NOFOLLOW 0
#endif
#ifdef _WIN32
# define FBINMODE "b"
#else
# define FBINMODE
#endif
#define F_DUPMASK 0x000f
#define F_WARNDUP 0x0100
#define F_ERRDUP 0x0200
#define F_MAP 0x1000 /* map format (or else CDB native format) */
/* Silly defines just to suppress silly compiler warnings.
* The thing is, trivial routines like strlen(), fgets() etc expects
* char* argument, and GCC>=4 complains about using unsigned char* here.
* Silly silly silly.
*/
#ifdef __GNUC__
static inline size_t ustrlen(const unsigned char *s) {
return strlen((const char*)s);
}
static inline unsigned char *ufgets(unsigned char *s, int size, FILE *f) {
return (unsigned char*)fgets((char*)s, size, f);
}
#else
# define ustrlen strlen
# define ufgets fgets
#endif
static unsigned char *buf;
static unsigned blen;
static char *cleanup_tmpname;
static void
#ifdef __GNUC__
__attribute__((noreturn,format(printf,2,3)))
#endif
error(int errnum, const char *fmt, ...)
{
if (fmt) {
va_list ap;
fprintf(stderr, "%s: ", progname);
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
}
if (errnum)
fprintf(stderr, ": %s\n", strerror(errnum));
else {
if (fmt) putc('\n', stderr);
fprintf(stderr, "%s: try `%s -h' for help\n", progname, progname);
}
fflush(stderr);
if (cleanup_tmpname)
unlink(cleanup_tmpname);
exit(errnum ? 111 : 2);
}
static void allocbuf(unsigned len) {
if (blen < len) {
buf = (unsigned char*)(buf ? realloc(buf, len) : malloc(len));
if (!buf)
error(ENOMEM, "unable to allocate %u bytes", len);
blen = len;
}
}
static int qmode(char *dbname, const char *key, int num, int flags)
{
struct cdb c;
struct cdb_find cf;
int r;
int n, found;
r = open(dbname, O_RDONLY);
if (r < 0 || cdb_init(&c, r) != 0)
error(errno, "unable to open database `%s'", dbname);
r = cdb_findinit(&cf, &c, key, strlen(key));
if (!r)
return 100;
else if (r < 0)
error(errno, "%s", key);
n = 0; found = 0;
while((r = cdb_findnext(&cf)) > 0) {
++n;
if (num && num != n) continue;
++found;
allocbuf(cdb_datalen(&c));
if (cdb_read(&c, buf, cdb_datalen(&c), cdb_datapos(&c)) != 0)
error(errno, "unable to read value");
fwrite(buf, 1, cdb_datalen(&c), stdout);
if (flags & F_MAP) putchar('\n');
if (num)
break;
}
if (r < 0)
error(0, "%s", key);
return found ? 0 : 100;
}
static void
fget(FILE *f, unsigned char *b, unsigned len, unsigned *posp, unsigned limit)
{
if (posp && limit - *posp < len)
error(EPROTO, "invalid database format");
if (fread(b, 1, len, f) != len) {
if (ferror(f)) error(errno, "unable to read");
fprintf(stderr, "%s: unable to read: short file\n", progname);
exit(2);
}
if (posp) *posp += len;
}
static int
fcpy(FILE *fi, FILE *fo, unsigned len, unsigned *posp, unsigned limit)
{
while(len > blen) {
fget(fi, buf, blen, posp, limit);
if (fo && fwrite(buf, 1, blen, fo) != blen) return -1;
len -= blen;
}
if (len) {
fget(fi, buf, len, posp, limit);
if (fo && fwrite(buf, 1, len, fo) != len) return -1;
}
return 0;
}
static int
dmode(char *dbname, char mode, int flags)
{
unsigned eod, klen, vlen;
unsigned pos = 0;
FILE *f;
if (strcmp(dbname, "-") == 0)
f = stdin;
else if ((f = fopen(dbname, "r" FBINMODE)) == NULL)
error(errno, "open %s", dbname);
allocbuf(2048);
fget(f, buf, 2048, &pos, 2048);
eod = cdb_unpack(buf);
while(pos < eod) {
fget(f, buf, 8, &pos, eod);
klen = cdb_unpack(buf);
vlen = cdb_unpack(buf + 4);
if (!(flags & F_MAP))
if (printf(mode == 'd' ? "+%u,%u:" : "+%u:", klen, vlen) < 0) return -1;
if (fcpy(f, stdout, klen, &pos, eod) != 0) return -1;
if (mode == 'd')
if (fputs(flags & F_MAP ? " " : "->", stdout) < 0)
return -1;
if (fcpy(f, mode == 'd' ? stdout : NULL, vlen, &pos, eod) != 0)
return -1;
if (putc('\n', stdout) < 0)
return -1;
}
if (pos != eod)
error(EPROTO, "invalid cdb file format");
if (!(flags & F_MAP))
if (putc('\n', stdout) < 0)
return -1;
return 0;
}
static int smode(char *dbname) {
FILE *f;
unsigned pos, eod;
unsigned cnt = 0;
unsigned kmin = 0, kmax = 0, ktot = 0;
unsigned vmin = 0, vmax = 0, vtot = 0;
unsigned hmin = 0, hmax = 0, htot = 0, hcnt = 0;
#define NDIST 11
unsigned dist[NDIST];
unsigned char toc[2048];
unsigned k;
if (strcmp(dbname, "-") == 0)
f = stdin;
else if ((f = fopen(dbname, "r" FBINMODE)) == NULL)
error(errno, "open %s", dbname);
pos = 0;
fget(f, toc, 2048, &pos, 2048);
allocbuf(2048);
eod = cdb_unpack(toc);
while(pos < eod) {
unsigned klen, vlen;
fget(f, buf, 8, &pos, eod);
klen = cdb_unpack(buf);
vlen = cdb_unpack(buf + 4);
fcpy(f, NULL, klen, &pos, eod);
fcpy(f, NULL, vlen, &pos, eod);
++cnt;
ktot += klen;
if (!kmin || kmin > klen) kmin = klen;
if (kmax < klen) kmax = klen;
vtot += vlen;
if (!vmin || vmin > vlen) vmin = vlen;
if (vmax < vlen) vmax = vlen;
vlen += klen;
}
if (pos != eod) error(EPROTO, "invalid cdb file format");
for (k = 0; k < NDIST; ++k)
dist[k] = 0;
for (k = 0; k < 256; ++k) {
unsigned i = cdb_unpack(toc + (k << 3));
unsigned hlen = cdb_unpack(toc + (k << 3) + 4);
if (i != pos) error(EPROTO, "invalid cdb hash table");
if (!hlen) continue;
for (i = 0; i < hlen; ++i) {
unsigned h;
fget(f, buf, 8, &pos, 0xffffffff);
if (!cdb_unpack(buf + 4)) continue;
h = (cdb_unpack(buf) >> 8) % hlen;
if (h == i) h = 0;
else {
if (h < i) h = i - h;
else h = hlen - h + i;
if (h >= NDIST) h = NDIST - 1;
}
++dist[h];
}
if (!hmin || hmin > hlen) hmin = hlen;
if (hmax < hlen) hmax = hlen;
htot += hlen;
++hcnt;
}
printf("number of records: %u\n", cnt);
printf("key min/avg/max length: %u/%u/%u\n",
kmin, cnt ? (ktot + cnt / 2) / cnt : 0, kmax);
printf("val min/avg/max length: %u/%u/%u\n",
vmin, cnt ? (vtot + cnt / 2) / cnt : 0, vmax);
printf("hash tables/entries/collisions: %u/%u/%u\n",
hcnt, htot, cnt - dist[0]);
printf("hash table min/avg/max length: %u/%u/%u\n",
hmin, hcnt ? (htot + hcnt / 2) / hcnt : 0, hmax);
printf("hash table distances:\n");
for(k = 0; k < NDIST; ++k)
printf(" %c%u: %6u %2u%%\n",
k == NDIST - 1 ? '>' : 'd', k == NDIST - 1 ? k - 1 : k,
dist[k], cnt ? dist[k] * 100 / cnt : 0);
return 0;
}
static void badinput(const char *fn) {
fprintf(stderr, "%s: %s: bad format\n", progname, fn);
exit(2);
}
static int getnum(FILE *f, unsigned *np, const char *fn) {
unsigned n;
int c = getc(f);
if (c < '0' || c > '9') badinput(fn);
n = c - '0';
while((c = getc(f)) >= '0' && c <= '9') {
c -= '0';
if (0xffffffff / 10 - c < n) badinput(fn);
n = n * 10 + c;
}
*np = n;
return c;
}
static void
addrec(struct cdb_make *cdbmp,
const unsigned char *key, unsigned klen,
const unsigned char *val, unsigned vlen,
int flags)
{
int r = cdb_make_put(cdbmp, key, klen, val, vlen, flags & F_DUPMASK);
if (r < 0)
error(errno, "cdb_make_put");
else if (r && (flags & F_WARNDUP)) {
fprintf(stderr, "%s: key `", progname);
fwrite(key, 1, klen, stderr);
fputs("' duplicated\n", stderr);
if (flags & F_ERRDUP)
exit(1);
}
}
static void
dofile_cdb(struct cdb_make *cdbmp, FILE *f, const char *fn, int flags)
{
unsigned klen, vlen;
int c;
while((c = getc(f)) == '+') {
if ((c = getnum(f, &klen, fn)) != ',' ||
(c = getnum(f, &vlen, fn)) != ':' ||
0xffffffff - klen < vlen)
badinput(fn);
allocbuf(klen + vlen);
fget(f, buf, klen, NULL, 0);
if (getc(f) != '-' || getc(f) != '>') badinput(fn);
fget(f, buf + klen, vlen, NULL, 0);
if (getc(f) != '\n') badinput(fn);
addrec(cdbmp, buf, klen, buf + klen, vlen, flags);
}
if (c != '\n') badinput(fn);
}
static void
dofile_ln(struct cdb_make *cdbmp, FILE *f, int flags)
{
unsigned char *k, *v;
while(ufgets(buf, blen, f) != NULL) {
unsigned l = 0;
for (;;) {
l += ustrlen(buf + l);
v = buf + l;
if (v > buf && v[-1] == '\n') {
v[-1] = '\0';
break;
}
if (l < blen)
allocbuf(l + 512);
if (!ufgets(buf + l, blen - l, f))
break;
}
k = buf;
while(*k == ' ' || *k == '\t') ++k;
if (!*k || *k == '#')
continue;
v = k;
while(*v && *v != ' ' && *v != '\t') ++v;
if (*v) *v++ = '\0';
while(*v == ' ' || *v == '\t') ++v;
addrec(cdbmp, k, ustrlen(k), v, ustrlen(v), flags);
}
}
static void
dofile(struct cdb_make *cdbmp, FILE *f, const char *fn, int flags)
{
if (flags & F_MAP)
dofile_ln(cdbmp, f, flags);
else
dofile_cdb(cdbmp, f, fn, flags);
if (ferror(f))
error(errno, "read error");
}
static int
cmode(char *dbname, char *tmpname, int argc, char **argv, int flags, int perms)
{
struct cdb_make cdb;
int fd;
if (!tmpname) {
tmpname = (char*)malloc(strlen(dbname) + 5);
if (!tmpname)
error(ENOMEM, "unable to allocate memory");
/* OpenBSD compiler complains about strcat() and strcpy() usage,
* and suggests to replace them with (non-standard) strlcat() and
* strlcpy(). This is silly, since it's obvious that usage of
* original str*() routines here is correct.
* This is compiler/environment bug, not tinycdb bug, so please
* fix it in proper place, and don't send patches to me. Thank you.
*/
strcat(strcpy(tmpname, dbname), ".tmp");
}
else if (strcmp(tmpname, "-") == 0 || strcmp(tmpname, dbname) == 0)
tmpname = dbname;
if (perms >= 0)
umask(0);
unlink(tmpname);
cleanup_tmpname = tmpname;
fd = open(tmpname, O_RDWR|O_CREAT|O_EXCL|O_NOFOLLOW,
perms >= 0 ? perms : 0666);
if (fd < 0 || cdb_make_start(&cdb, fd) < 0)
error(errno, "unable to create %s", tmpname);
allocbuf(4096);
if (argc) {
int i;
for (i = 0; i < argc; ++i) {
if (strcmp(argv[i], "-") == 0)
dofile(&cdb, stdin, "(stdin)", flags);
else {
FILE *f = fopen(argv[i], "r");
if (!f)
error(errno, "%s", argv[i]);
dofile(&cdb, f, argv[i], flags);
fclose(f);
}
}
}
else
dofile(&cdb, stdin, "(stdin)", flags);
if (cdb_make_finish(&cdb) != 0)
error(errno, "cdb_make_finish");
if (close(fd) != 0)
error(errno, "close %s", tmpname);
if (tmpname != dbname)
if (rename(tmpname, dbname) != 0)
error(errno, "rename %s->%s", tmpname, dbname);
return 0;
}
int main(int argc, char **argv)
{
int c;
char mode = 0;
char *tmpname = NULL;
int flags = 0;
int num = 0;
int r;
int perms = -1;
extern char *optarg;
extern int optind;
#ifdef HAVE_PROGRAM_INVOCATION_SHORT_NAME
argv[0] = progname;
#else
if (argv[0] && (progname = strrchr(argv[0], '/')) != NULL)
argv[0] = ++progname;
else
progname = argv[0];
#endif
if (argc <= 1)
error(0, "no arguments given");
while((c = getopt(argc, argv, "qdlcsht:n:mwruep:0")) != EOF)
switch(c) {
case 'q': case 'd': case 'l': case 'c': case 's':
if (mode && mode != c)
error(0, "different modes of operation requested");
mode = c;
break;
case 't': tmpname = optarg; break;
case 'w': flags |= F_WARNDUP; break;
case 'e': flags |= F_WARNDUP | F_ERRDUP; break;
case 'r': flags = (flags & ~F_DUPMASK) | CDB_PUT_REPLACE; break;
case 'u': flags = (flags & ~F_DUPMASK) | CDB_PUT_INSERT; break;
case '0': flags = (flags & ~F_DUPMASK) | CDB_PUT_REPLACE0; break;
case 'm': flags |= F_MAP; break;
case 'p': {
char *ep = NULL;
perms = strtol(optarg, &ep, 0);
if (perms < 0 || perms > 0777 || (ep && *ep))
error(0, "invalid permissions `%s'", optarg);
break;
}
case 'n': {
char *ep = NULL;
if ((num = strtol(optarg, &ep, 0)) <= 0 || (ep && *ep))
error(0, "invalid record number `%s'", optarg);
break;
}
case 'h':
#define strify(x) _strify(x)
#define _strify(x) #x
printf("\
%s: Constant DataBase (CDB) tool version " strify(TINYCDB_VERSION)
". Usage is:\n\
query: %s -q [-m] [-n recno|-a] cdbfile key\n\
dump: %s -d [-m] [cdbfile|-]\n\
list: %s -l [-m] [cdbfile|-]\n\
create: %s -c [-m] [-wrue0] [-t tempfile|-] [-p perms] cdbfile [infile...]\n\
stats: %s -s [cdbfile|-]\n\
help: %s -h\n\
", progname, progname, progname, progname, progname, progname, progname);
return 0;
default:
error(0, NULL);
}
argv += optind;
argc -= optind;
#ifdef SIGXFSZ
/* at least on some linux architectures, writing past file size limit makes
* the process to receive SIGXFSZ in addition to returning -1 EFBIG
* from write(). Ignore SIGXFSZ to be able to handle write errors */
signal(SIGXFSZ, SIG_IGN);
#endif
switch(mode) {
case 'q':
if (argc < 2) error(0, "no database or key to query specified");
if (argc > 2) error(0, "extra arguments in command line");
r = qmode(argv[0], argv[1], num, flags);
break;
case 'c':
if (!argc) error(0, "no database name specified");
if ((flags & F_WARNDUP) && !(flags & F_DUPMASK))
flags |= CDB_PUT_WARN;
r = cmode(argv[0], tmpname, argc - 1, argv + 1, flags, perms);
break;
case 'd':
case 'l':
if (argc > 1) error(0, "extra arguments for dump/list");
r = dmode(argc ? argv[0] : "-", mode, flags);
break;
case 's':
if (argc > 1) error(0, "extra argument(s) for stats");
r = smode(argc ? argv[0] : "-");
break;
default:
error(0, "no -q, -c, -d, -l or -s option specified");
}
if (r < 0 || fflush(stdout) < 0)
error(errno, "unable to write: %d", c);
return r;
}
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