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/* id3 - an ID3 tag editor
* Copyright (c) 1998,1999,2000 Robert Woodcock <rcw@debian.org>
* This code is hereby licensed for public consumption under either the
* GNU GPL v2 or greater, or Larry Wall's Artistic license - your choice.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* genre.h is (c) 1998 Robert Alto <badcrc@tscnet.com> and licensed only
* under the GPL.
*/
const char version[]="0.15";
const char usage[]= "usage: id3 -[tTaAycg] \"value\" file1 [file2...]\n\
id3 -d file1 [file2...]\n\
id3 -l file1 [file2...]\n\
id3 -L\n\
id3 -v\n\
-t Modifies a Title tag\n\
-T Modifies a Track tag\n\
-a Modifies an Artist tag\n\
-A Modifies an Album tag\n\
-y Modifies a Year tag\n\
-c Modifies a Comment tag\n\
-g Modifies a Genre tag\n\
-l Lists an ID3 tag\n\
-L Lists all genres\n\
-R Uses an rfc822-style format for output\n\
-d Deletes an ID3 tag\n\
-h Displays this help info\n\
-v Prints version info\n";
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "genre.h"
struct id3 {
char tag[3];
char title[30];
char artist[30];
char album[30];
char year[4];
/* With ID3 v1.0, the comment is 30 chars long */
/* With ID3 v1.1, if comment[28] == 0 then comment[29] == tracknum */
char comment[30];
unsigned char genre;
};
int main (int argc, char *argv[])
{
int deletetag=0, listtag=0, rfc822style=0, hastag=0, notdir=0;
int v11tag=0, i, r, exitcode=0;
int matches, lettersmatched; /* genre lazy matching */
int newtitle=0, newartist=0, newalbum=0;
int newyear=0, newcomment=0, newgenre=0;
int newtrack=0;
struct id3 oldid3, newid3;
struct stat finfo;
FILE *fp;
memset(&newid3, 0, 127);
newid3.genre=255;
if (argc < 2) {
fprintf(stderr, "%s", usage);
exit(1);
}
while (1) {
r = getopt(argc, argv, "dhlLRvt:T:a:A:y:c:g:");
if (r == -1) break;
switch (r) {
case 'd': /* delete a tag */
deletetag=1;
break;
case 'l': /* list a tag */
listtag=1;
break;
case 'L': /* list all genres */
for (i=0; i<genre_count; i++)
printf("%3d: %s\n", i, genre_table[i]);
exit(0);
break;
case 'R': /* list tags in rfc822-style format */
rfc822style=1;
break;
case 't': /* Title */
memcpy(newid3.title, optarg, 30);
for (i=strlen(optarg);i<30;i++) newid3.title[i]=0;
newtitle=1;
break;
case 'T': /* Track */
if (isdigit(optarg[0])) {
newid3.comment[28] = 0;
newid3.comment[29] = (unsigned char)atoi(optarg);
newtrack=1;
} else {
fprintf(stderr, "%s: Track: %s: Expected a number.\n", argv[0], optarg);
exit(1);
}
break;
case 'a': /* Artist */
memcpy(newid3.artist, optarg, 30);
for (i=strlen(optarg);i<30;i++) newid3.artist[i]=0;
newartist=1;
break;
case 'A': /* Album */
memcpy(newid3.album, optarg, 30);
for (i=strlen(optarg);i<30;i++) newid3.album[i]=0;
newalbum=1;
break;
case 'y': /* Year */
memcpy(newid3.year, optarg, 4);
for (i=strlen(optarg);i<4;i++) newid3.year[i]=0;
newyear=1;
break;
case 'c': /* Comment */
memcpy(newid3.comment, optarg, 28);
for (i=strlen(optarg);i<28;i++) newid3.comment[i]=0;
newcomment=1;
break;
case 'g': /* Genre */
if (isdigit(optarg[0])) { /* genre by number */
newid3.genre = (unsigned char)atoi(optarg);
} else { /* genre by name */
matches=3; /* don't trip the first time */
lettersmatched=0;
/* lazy match - keep comparing down the list until we only get one hit */
for (lettersmatched=0; matches>1; lettersmatched++) {
for (i=matches=0; i<genre_count; i++) {
/* Kludge to avoid infinite loop with "-g Fusion" */
if (i == 84) i++;
if (strncasecmp(genre_table[i], optarg, lettersmatched) == 0) {
matches++;
newid3.genre = (unsigned char)i;
}
}
}
if (matches == 0) { /* no hits - complain to user */
fprintf(stderr, "%s: No such genre '%s'.\n", argv[0], optarg);
exit(1);
}
}
newgenre=1;
break;
case 'v': /* Version info */
printf("This is id3 v%s.\n", version);
exit(0);
break;
case 'h': /* Help info */
printf("%s", usage);
exit(0);
break;
case ':': /* need a value for an option */
case '?': /* unknown option */
fprintf(stderr, "%s", usage);
exit(1);
}
}
if (optind >= argc) {
fprintf(stderr, "%s: Need a filename to work on.\n%s", argv[0], usage);
exit(1);
}
for (i=optind; i<argc; i++) {
notdir=hastag=1; /* innocent until proven guilty */
if (newtitle || newartist || newalbum || newyear ||
newcomment || newtrack || newgenre || deletetag) {
fp = fopen(argv[i], "r+"); /* read/write */
} else {
fp = fopen(argv[i], "r"); /* read only */
}
if (fp == NULL) { /* file didn't open */
fprintf(stderr, "%s: fopen: %s: ", argv[0], argv[i]);
perror("");
exitcode=1;
continue;
}
fstat(fileno(fp), &finfo);
if (S_ISDIR(finfo.st_mode)) notdir=0;
if (fseek(fp, -128, SEEK_END) < 0) {
/* problem rewinding */
hastag=0;
} else { /* we rewound successfully */
if (fread(&oldid3, 128, 1, fp) < 0) {
/* read error */
fprintf(stderr, "%s: fread: %s: ", argv[0], argv[i]);
perror("");
exitcode=1;
hastag=0;
}
}
/* This simple detection code has a 1 in 16777216
* chance of misrecognizing or deleting the last 128
* bytes of your mp3 if it isn't tagged. ID3 ain't
* world peace, live with it.
*/
if (strncmp(oldid3.tag, "TAG", 3)) hastag=0;
/* v1.1 tag == true if comment[28] == 0 */
v11tag = !oldid3.comment[28];
if (!hastag) {
memset(&oldid3, 0, 127);
oldid3.genre=255;
}
if (listtag) {
if (rfc822style) {
printf("\nFilename: %s\n", argv[i]);
printf("Title: %-30.30s\n", oldid3.title);
printf("Artist: %-30.30s\n", oldid3.artist);
printf("Album: %-30.30s\n", oldid3.album);
printf("Year: %-4.4s\n", oldid3.year);
printf("Genre: %s (%d)\n",
(oldid3.genre < genre_count) ?
genre_table[oldid3.genre] : "Unknown", oldid3.genre);
if (v11tag)
printf("Track: %d\nComment: %-28.28s\n",
oldid3.comment[29], oldid3.comment);
else
printf("Comment: %-30.30s\n", oldid3.comment);
} else {
printf("%s:", argv[i]);
if (hastag) {
printf("\nTitle : %-30.30s Artist: %-30.30s\n",
oldid3.title, oldid3.artist);
printf("Album : %-30.30s Year: %-4.4s, Genre: %s (%d)\n",
oldid3.album, oldid3.year,
(oldid3.genre < genre_count)
? genre_table[oldid3.genre] :
"Unknown", oldid3.genre);
if (v11tag)
printf("Comment: %-28.28s Track: %d\n", oldid3.comment, oldid3.comment[29]);
else
printf("Comment: %-30.30s\n", oldid3.comment);
} else {
if (notdir) {
printf(" No ID3 tag.\n");
} else {
printf(" Directory.\n");
}
}
}
}
if (hastag && deletetag) {
if (ftruncate(fileno(fp), ftell(fp)-128) < 0) {
fprintf(stderr, "%s: ftruncate: %s: ", argv[0], argv[i]);
perror("");
exitcode=1;
}
fclose(fp);
continue;
}
strncpy(newid3.tag, "TAG", 3);
if (!newtitle) memcpy(&newid3.title, &oldid3.title, 30);
if (!newartist) memcpy(&newid3.artist, &oldid3.artist, 30);
if (!newalbum) memcpy(&newid3.album, &oldid3.album, 30);
if (!newyear) memcpy(&newid3.year, &oldid3.year, 4);
if (!newcomment) memcpy(&newid3.comment, &oldid3.comment, 28);
if (!newtrack) { memcpy(&newid3.comment[28], &oldid3.comment[28], 2); }
if (!newgenre) memcpy(&newid3.genre, &oldid3.genre, 1);
v11tag = !newid3.comment[28];
if (newtitle || newartist || newalbum || newyear || newcomment || newgenre || newtrack) {
/* something did change */
if (rfc822style) {
printf("\nFilename: %s\n", argv[i]);
printf("Title: %-30.30s\n", newid3.title);
printf("Artist: %-30.30s\n", newid3.artist);
printf("Album: %-30.30s\n", newid3.album);
printf("Year: %-4.4s\n", newid3.year);
printf("Genre: %s (%d)\n",
(newid3.genre < genre_count) ?
genre_table[newid3.genre] : "Unknown", newid3.genre);
if (v11tag)
printf("Track: %d\nComment: %-28.28s\n",
newid3.comment[29], newid3.comment);
else
printf("Comment: %-30.30s\n", newid3.comment);
} else {
printf("Title : %-30.30s Artist: %-30.30s\n", newid3.title, newid3.artist);
printf("Album : %-30.30s Year: %-4.4s, Genre: %s (%d)\n",
newid3.album, newid3.year,
(newid3.genre < genre_count) ?
genre_table[newid3.genre] : "Unknown", newid3.genre);
if (v11tag)
printf("Comment: %-28.28s Track: %d\n", newid3.comment, newid3.comment[29]);
else
printf("Comment: %-30.30s\n", newid3.comment);
}
if (hastag) {
/* seek back 128 bytes to overwrite it */
fseek(fp, -128, SEEK_END);
} else {
/* new tag */
fseek(fp, 0, SEEK_END);
}
if (fwrite(&newid3, 128, 1, fp) < 0) exitcode=1;
}
fclose(fp);
/* Reset tag flags so that we don't mistakenly assume the
* next file also has a tag. (No need to reset hastag here,
* because it is always set to 1 until a non-tag is found.
*/
oldid3.tag[0] = '\0';
}
return exitcode;
}
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