emailler/apps/rebuild.c

247 lines
6.0 KiB
C

/////////////////////////////////////////////////////////////////
// Rebuild EMAIL.DB & NEXT.EMAIL files for an existing mailbox
// Bobbi July 2020
/////////////////////////////////////////////////////////////////
#include <cc65.h>
#include <errno.h>
#include <ctype.h>
#include <fcntl.h>
#include <conio.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include <string.h>
#include <dirent.h>
#include <apple2_filetype.h>
#include "email_common.h"
#define NETBUFSZ 1500+4 // 4 extra bytes for overlap between packets
#define LINEBUFSZ 1000 // According to RFC2822 Section 2.1.1 (998+CRLF)
#define READSZ 1024 // Must be less than NETBUFSZ to fit in buf[]
static unsigned char buf[NETBUFSZ+1]; // One extra byte for null terminator
static char linebuf[LINEBUFSZ];
static char dirname[255];
static char filename[255];
/*
* Keypress before quit
*/
void confirm_exit(void) {
printf("\nPress any key ");
cgetc();
exit(0);
}
/*
* Called for all errors
*/
void error_exit() {
confirm_exit();
}
/*
* Read a text file a line at a time
* Returns number of chars in the line, or -1 if EOF.
* Expects Apple ][ style line endings (CR) and does no conversion
* fp - file to read from
* writep - Pointer to buffer into which line will be written
* pos - position in file is updated via this pointer
*/
int16_t get_line(FILE *fp, char *writep) {
static uint16_t rd = 0; // Read
static uint16_t end = 0; // End of valid data in buf
uint16_t i = 0;
while (1) {
if (rd == end) {
end = fread(buf, 1, READSZ, fp);
rd = 0;
}
if (end == 0)
return -1; // EOF
writep[i++] = buf[rd++];
if (writep[i - 1] == '\r') {
writep[i] = '\0';
return i;
}
}
}
/*
* Update EMAIL.DB - quick access database for header info
*/
void update_email_db(struct emailhdrs *h) {
FILE *fp;
sprintf(filename, "%s/EMAIL.DB", dirname);
_filetype = PRODOS_T_BIN;
_auxtype = 0;
fp = fopen(filename, "ab");
if (!fp) {
printf("Can't open %s\n", filename);
error_exit();
}
fwrite(h, sizeof(struct emailhdrs), 1, fp);
fclose(fp);
}
/*
* Write NEXT.EMAIL file with number of next EMAIL.n file to be created
*/
void write_next_email(uint16_t num) {
FILE *fp;
sprintf(filename, "%s/NEXT.EMAIL", dirname);
_filetype = PRODOS_T_TXT;
_auxtype = 0;
fp = fopen(filename, "wb");
if (!fp) {
printf("2)Can't open %s\n", filename);
fclose(fp);
error_exit();
}
fprintf(fp, "%u", num);
fclose(fp);
}
/*
* Copy one header from source->dest, removing '\r' from end
*/
void copyheader(char *dest, char *source, uint16_t len) {
uint16_t i;
memset(dest, ' ', len);
for (i = 0; i < len; ++i) {
if ((*source == '\0') || (*source == '\r'))
return;
*dest++ = *source++;
}
}
/*
* Repair a mailbox by scanning the messages and rebuilding
* EMAIL.DB and NEXT.EMAIL
*/
void repair_mailbox(void) {
static struct emailhdrs hdrs;
uint16_t chars, headerchars, emailnum, minemailnum, maxemailnum;
uint8_t headers;
FILE *fp;
DIR *dp;
struct dirent *d;
dp = opendir(dirname);
if (!dp) {
printf("Can't open dir %s\n", dirname);
error_exit();
}
sprintf(filename, "%s/EMAIL.DB", dirname);
_filetype = PRODOS_T_BIN;
_auxtype = 0;
fp = fopen(filename, "wb");
if (!fp) {
closedir(dp);
printf("Can't create %s\n", filename);
error_exit();
}
fclose(fp);
sprintf(filename, "%s/NEXT.EMAIL", dirname);
_filetype = PRODOS_T_TXT;
_auxtype = 0;
fp = fopen(filename, "wb");
if (!fp) {
closedir(dp);
printf("Can't create %s\n", filename);
error_exit();
}
fclose(fp);
printf("** Scanning directory %s\n", dirname);
while (d = readdir(dp)) {
if (!strncmp(d->d_name, "EMAIL.DB", 8))
continue;
if (!strncmp(d->d_name, "NEXT.EMAIL", 10))
continue;
if (strncmp(d->d_name, "EMAIL.", 6))
continue;
sscanf(d->d_name, "EMAIL.%u", &emailnum);
if (emailnum < minemailnum)
minemailnum = emailnum;
if (emailnum > maxemailnum)
maxemailnum = emailnum;
}
closedir(dp);
printf("** Will process EMAIL.%u to EMAIL.%u\n", minemailnum, maxemailnum);
for (emailnum = minemailnum; emailnum <= maxemailnum; ++emailnum) {
sprintf(filename, "%s/EMAIL.%u", dirname, emailnum);
fp = fopen(filename, "r");
if (!fp)
continue;
printf("** Processing file %s\n", filename);
headers = 1;
headerchars = 0;
hdrs.emailnum = emailnum;
hdrs.skipbytes = 0; // Just in case it doesn't get set
hdrs.status = 'R';
hdrs.tag = ' ';
while ((chars = get_line(fp, linebuf)) != -1) {
if (headers) {
headerchars += chars;
if (!strncmp(linebuf, "Date: ", 6)) {
copyheader(hdrs.date, linebuf + 6, 39);
hdrs.date[39] = '\0';
}
if (!strncmp(linebuf, "From: ", 6)) {
copyheader(hdrs.from, linebuf + 6, 79);
hdrs.from[79] = '\0';
}
if (!strncmp(linebuf, "To: ", 4)) {
copyheader(hdrs.to, linebuf + 4, 79);
hdrs.to[79] = '\0';
}
if (!strncmp(linebuf, "Cc: ", 4)) {
copyheader(hdrs.cc, linebuf + 4, 79);
hdrs.cc[79] = '\0';
}
if (!strncmp(linebuf, "Subject: ", 9)) {
copyheader(hdrs.subject, linebuf + 9, 79);
hdrs.subject[79] = '\0';
}
if (linebuf[0] == '\r') {
headers = 0;
hdrs.skipbytes = headerchars;
}
}
}
fclose(fp);
update_email_db(&hdrs);
}
closedir(dp);
write_next_email(maxemailnum + 1);
printf("\nRebuilt %s/EMAIL.DB\n", dirname);
printf("Rebuilt %s/NEXT.EMAIL\n\n", dirname);
}
void main(void) {
videomode(VIDEOMODE_80COL);
printf("%c%s Rebuild EMAIL.DB Utility%c\n", 0x0f, PROGNAME, 0x0e);
printf("\nEnter full path to the mailbox to rebuild> ");
fgets(dirname, 128, stdin);
dirname[strlen(dirname) - 1] = '\0'; // Eat '\r'
if (strlen(dirname) == 0) {
printf("\nCancelled\n");
confirm_exit();
}
printf("\nUpdating %s\n", dirname);
repair_mailbox();
confirm_exit();
}