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emailler/apps/attacher.c

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/////////////////////////////////////////////////////////////////////////////
// Handle attaching files to outgoing messages
// Bobbi July 2020
/////////////////////////////////////////////////////////////////////////////
#include <conio.h>
#include <ctype.h>
#include <dirent.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include "email_common.h"
#define PROMPT_ROW 23
#define EOL '\r'
#define BELL 0x07
#define BACKSPACE 0x08
#define RETURN 0x0d
#define NORMAL 0x0e
#define INVERSE 0x0f
#define ESC 0x1b
#define DELETE 0x7f
#define NETBUFSZ 1500
#define LINEBUFSZ 1000 // According to RFC2822 Section 2.1.1 (998+CRLF)
#define READSZ 1024 // Must be less than NETBUFSZ to fit in buf[]
#define IOBUFSZ 8192
unsigned char buf[NETBUFSZ+1]; // One extra byte for null terminator
char linebuf[LINEBUFSZ];
char userentry[80];
uint8_t quit_to_email; // If 1, launch EMAIL.SYSTEM on quit
char filename[80];
char iobuf[IOBUFSZ];
struct attachinfo {
char filename[16];
uint32_t size;
struct attachinfo *next;
};
struct attachinfo *attachments = NULL;
#define ERR_NONFATAL 0
#define ERR_FATAL 1
/*
* Annoying beep
*/
void beep(void) {
uint8_t *p = (uint8_t*)0xc030; // Speaker
uint8_t junk;
uint16_t i;
for (i = 0; i < 200; ++i) {
junk = *p;
for (junk = 0; junk < 50; ++junk); // Reduce pitch
}
}
/*
* Clear to EOL
*/
void clreol(void) {
uint8_t x = wherex(), y = wherey();
cclear(80 - x);
gotoxy(x, y);
}
/*
* Clear line
*/
void clrline(void) {
uint8_t x = wherex();
gotox(0);
cclear(80);
gotox(x);
}
/*
* Put cursor at beginning of PROMPT_ROW
*/
void goto_prompt_row(void) {
gotoxy(0, PROMPT_ROW);
}
/*
* Show error messages
*/
void error(uint8_t fatal, const char *fmt, ...) {
va_list v;
if (fatal) {
videomode(VIDEOMODE_80COL);
clrscr();
printf("\n\n%cFATAL ERROR:%c\n\n", INVERSE, NORMAL);
va_start(v, fmt);
vprintf(fmt, v);
va_end(v);
printf("\n\n\n\n[Press Any Key To Quit]");
cgetc();
exit(1);
} else {
putchar('\r');
va_start(v, fmt);
vprintf(fmt, v);
va_end(v);
printf(" - [Press Any Key]");
cgetc();
putchar('\r');
}
}
/*
* Spinner while encoding attachments
*/
void spinner(uint32_t sz, uint8_t final) {
static char chars[] = "|/-\\";
static char buf[10] = "";
static uint8_t i = 0;
uint8_t j;
for (j = 0; j < strlen(buf); ++j)
putchar(BACKSPACE);
if (final) {
sprintf(buf, " [%lu]\n", sz);
printf("%s", buf);
strcpy(buf, "");
}
else {
sprintf(buf, "%c %lu", chars[(i++) % 4], sz);
printf("%s", buf);
}
}
/*
* Read parms from EMAIL.CFG
*/
void readconfigfile(void) {
FILE *fp = fopen("EMAIL.CFG", "r");
if (!fp)
error(ERR_FATAL, "Can't open config file EMAIL.CFG");
fscanf(fp, "%s", cfg_server);
fscanf(fp, "%s", cfg_user);
fscanf(fp, "%s", cfg_pass);
fscanf(fp, "%s", cfg_pop_delete);
fscanf(fp, "%s", cfg_smtp_server);
fscanf(fp, "%s", cfg_smtp_domain);
fscanf(fp, "%s", cfg_instdir);
fscanf(fp, "%s", cfg_emaildir);
fscanf(fp, "%s", cfg_emailaddr);
fclose(fp);
}
/*
* Read a text file a line at a time
* Returns number of chars in the line, or 0 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
* n - length of buffer. Longer lines will be truncated and terminated with CR.
*/
uint16_t get_line(FILE *fp, char *writep, uint16_t n) {
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)
goto done;
if (i == n - 1) {
writep[i - 1] = '\r';
goto done;
}
writep[i++] = buf[rd++];
if (writep[i - 1] == '\r')
goto done;
}
done:
writep[i] = '\0';
return i;
}
/*
* Base64 encode table
*/
static const char b64enc[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
/*
* Encode Base64 format
* p - Pointer to source buffer
* q - Pointer to destination buffer
* len - Length of buffer to encode
* Returns length of encoded data
*/
uint16_t encode_base64(char *p, char *q, uint16_t len) {
uint16_t j = 0;
uint16_t i, ii;
for (i = 0; i < len / 3; ++i) {
ii = 3 * i;
q[j++] = b64enc[(p[ii] & 0xfc) >> 2];
q[j++] = b64enc[((p[ii] & 0x03) << 4) | ((p[ii + 1] & 0xf0) >> 4)];
q[j++] = b64enc[((p[ii + 1] & 0x0f) << 2) | ((p[ii + 2] & 0xc0) >> 6)];
q[j++] = b64enc[(p[ii + 2] & 0x3f)];
if (((i + 1) % 18) == 0)
q[j++] = '\r';
}
ii += 3;
i = len - ii; // Bytes remaining to encode
switch (i) {
case 1:
q[j++] = b64enc[(p[ii] & 0xfc) >> 2];
q[j++] = b64enc[(p[ii] & 0x03) << 4];
q[j++] = '=';
q[j++] = '=';
break;
case 2:
q[j++] = b64enc[(p[ii] & 0xfc) >> 2];
q[j++] = b64enc[((p[ii] & 0x03) << 4) | ((p[ii + 1] & 0xf0) >> 4)];
q[j++] = b64enc[(p[ii + 1] & 0x0f) << 2];
q[j++] = '=';
break;
}
q[j] = '\0';
return j;
}
/*
* Prompt for a name in the bottom line of the screen
* Returns number of chars read.
* prompt - Message to display before > prompt
* is_file - if 1, restrict chars to those allowed in ProDOS filename
* Returns number of chars read, or 255 if ESC pressed
*/
uint8_t prompt_for_name(char *prompt, uint8_t is_file) {
uint16_t i;
char c;
cursor(0);
goto_prompt_row();
clreol();
revers(1);
cprintf("%s>", prompt);
revers(0);
gotox(2 + strlen(prompt));
i = 0;
while (1) {
c = cgetc();
if (is_file && !isalnum(c) && (c != RETURN) && (c != BACKSPACE) &&
(c != DELETE) && (c != ESC) && (c != '.') && (c != '/')) {
beep();
continue;
}
switch (c) {
case RETURN:
goto done;
case BACKSPACE:
case DELETE:
if (i > 0) {
gotox(wherex() - 1);
cputc(' ');
gotox(wherex() - 1);
--i;
} else
beep();
break;
case ESC:
userentry[0] = '\0';
i = 255;
goto esc_pressed;
default:
cputc(c);
userentry[i++] = c;
}
if (i == 79)
goto done;
}
done:
userentry[i] = '\0';
esc_pressed:
clrline();
cursor(1);
return i;
}
/*
* Prompt ok?
* Returns 0 for yes
* 1 for no
* 2 for ESC
*/
char prompt_okay(char *msg) {
char c;
cursor(0);
goto_prompt_row();
clreol();
revers(1);
cprintf("%s (y/n/ESC)", msg);
revers(0);
while (1) {
c = cgetc();
if ((c == 'y') || (c == 'Y') || (c == 'n') || (c == 'N') || c == ESC)
break;
beep();
}
if ((c == 'y') || (c == 'Y'))
c = 0;
else if (c == ESC)
c = 2;
else
c = 1;
return c;
}
struct tabent {
char name[16];
uint8_t type;
uint32_t size;
} *entry;
// It is best if FILESPERPAGE is a multiple of FILELINES
#define FILELINES 16 // Number of lines displayed in file_ui
#define FILESPERPAGE 160 // Number of files loaded into iobuf[]
/*
* Draw one line in file chooser UI
* i - index of file to draw
* first - index of first file on screen
* selected - index of currently selected file
* entries - total number of file entries in directory
*/
void file_ui_draw(uint16_t i, uint16_t first, uint16_t selected, uint16_t entries) {
struct tabent *entry;
if (i < first)
return;
gotoxy(5, i - first + 6);
if (i < entries) {
entry = (struct tabent*)iobuf + i;
if (entry->type == 0x0f) {
snprintf(userentry, 80, "[ %s ] ", entry->name);
userentry[34] = '\0';
} else {
snprintf(userentry, 80, " %s ", entry->name);
snprintf(&userentry[18], 60, " %8lu ", entry->size);
switch (entry->type) {
case 0x04:
sprintf(&userentry[30], "TXT ");
break;
case 0x06:
sprintf(&userentry[30], "BIN ");
break;
case 0x19:
sprintf(&userentry[30], "ADB ");
break;
case 0x1a:
sprintf(&userentry[30], "AWP ");
break;
case 0x1b:
sprintf(&userentry[30], "ASP ");
break;
case 0xfc:
sprintf(&userentry[30], "BAS ");
break;
case 0xff:
sprintf(&userentry[30], "SYS ");
break;
default:
sprintf(&userentry[30], "$%02x ", entry->type);
}
}
if (i == selected)
revers(1);
cputs(userentry);
if (i == selected)
revers(0);
} else {
strcpy(userentry, " ");
cputs(userentry);
}
}
/*
* File chooser UI
* first - index of first file on screen
* selected - index of currently selected file
* entries - total number of file entries in directory
*/
void file_ui_draw_all(uint16_t first, uint16_t selected, uint16_t entries) {
uint16_t i;
uint16_t last = first + FILELINES;
for (i = first; i < last; ++i)
file_ui_draw(i, first, selected, entries);
}
/*
* Asm code for online()
*/
#pragma optimize (push, off)
void onlineasm(void) {
__asm__("lda #$00"); // All devices
__asm__("sta mliparam + 1");
__asm__("lda #<%v", iobuf); // iobuf LSB
__asm__("sta mliparam + 2");
__asm__("lda #>%v", iobuf); // iobuf MSB
__asm__("ina"); // Bump up 256 bytes into iobuf
__asm__("sta mliparam + 3");
__asm__("lda #$c5"); // ON_LINE
__asm__("ldx #$02"); // Two parms
__asm__("jsr callmli");
}
#pragma optimize (pop)
/*
* Perform ProDOS MLI ON_LINE call to
* write all online volume names into iobuf[]
* Return the number of entries
*/
uint16_t online(void) {
uint16_t entries = 0;
struct tabent *entry;
uint8_t i, j, len;
onlineasm();
entry = (struct tabent*)iobuf;
for (i = 0; i < 16; ++i) {
len = iobuf[256 + i * 16] & 0x0f;
if (len > 0) {
entry->type = 0x0f;
entry->name[0] = '/';
for (j = 0; j < len; ++j)
entry->name[j + 1] = iobuf[256 + i * 16 + j + 1];
entry->name[j + 1] = '\0';
++entry;
++entries;
}
}
return entries;
}
/*
* Read directory entries and populate table in iobuf[]
* for file_ui()
* page - page index, each page has FILESPERPAGE entries
* page is 0, 1, 2, 3 ...
* num_entries - number of entries read
* Returns 0 there are more files, 1 if end of directory reached
*/
uint8_t read_dir(uint8_t page, uint16_t *num_entries) {
DIR *dp;
struct dirent *ent;
struct tabent *entry;
uint8_t rc = 0;
uint16_t entries = 0, i = 0;
entry = (struct tabent*)iobuf;
if (page == 0) {
strcpy(entry->name, ".."); // Add fake '..' entry
entry->type = 0x0f;
++entry;
++entries;
}
dp = opendir(".");
while (1) {
ent = readdir(dp);
if (!ent) {
rc = 1;
break;
}
if (++i < page * FILESPERPAGE)
continue;
if (entries >= FILESPERPAGE)
break;
memcpy(entry->name, ent->d_name, 16);
entry->type = ent->d_type;
entry->size = ent->d_size;
++entry;
++entries;
}
closedir(dp);
*num_entries = entries;
return rc;
}
/*
* File chooser UI
* Leaves file name in userentry[], or empty string if error/cancel
* msg1 - Message for top line
* msg2 - Message for second line
* msg3 - Message for third line
*/
void file_ui(char *msg1, char *msg2, char *msg3) {
struct tabent *entry;
char c;
uint16_t entries;
uint8_t end_of_dir;
uint16_t first = 0, current = 0;
uint8_t toplevel = 0, page = 0;
restart:
clrscr();
cursor(0);
gotoxy(0,0);
revers(1);
cprintf("%s", msg1);
revers(0);
gotoxy(0,1);
cprintf("%s", msg2);
gotoxy(0,2);
cprintf("%s", msg3);
getcwd(userentry, 80);
gotoxy(0,4);
revers(1);
cprintf("%s", (toplevel ? "Volumes" : userentry));
revers(0);
if (toplevel)
entries = online();
else
end_of_dir = read_dir(page, &entries);
redraw:
file_ui_draw_all(first, current, entries);
while (1) {
c = cgetc();
switch (c) {
case 0x0b: // Up
if (current > 0)
--current;
else
if (page > 0) {
--page;
current = FILESPERPAGE - 1;
first = current - FILELINES + 1;
goto restart;
}
if (current < first) {
if (first > FILELINES)
first -= FILELINES;
else
first = 0;
goto redraw;
}
file_ui_draw(current, first, current, entries);
file_ui_draw(current + 1, first, current, entries);
break;
case 0x0a: // Down
if (current < entries - 1)
++current;
else if (!end_of_dir) {
++page;
first = current = 0;
goto restart;
}
if (current >= first + FILELINES) {
first += FILELINES;
goto redraw;
}
file_ui_draw(current - 1, first, current, entries);
file_ui_draw(current, first, current, entries);
break;
case EOL:
entry = (struct tabent*)iobuf + current;
switch (entry->type) {
case 0x0f: // Directory
getcwd(userentry, 80);
if (strcmp(entry->name, "..") == 0) {
for (c = strlen(userentry); c > 0; --c)
if (userentry[c] == '/') {
userentry[c] = '\0';
break;
}
if (c <= 1)
toplevel = 1;
else
chdir(userentry);
first = current = 0;
goto restart;
} else {
if (toplevel) {
strcpy(userentry, entry->name);
chdir(userentry);
} else {
getcwd(userentry, 80);
strcat(userentry, "/");
strcat(userentry, entry->name);
chdir(userentry);
}
toplevel = 0;
first = current = 0;
goto restart;
}
break;
case 0x04: // ASCII text
getcwd(userentry, 80);
strcat(userentry, "/");
strcat(userentry, entry->name);
goto done;
break;
default:
getcwd(userentry, 80);
strcat(userentry, "/");
strcat(userentry, entry->name);
goto done;
}
break;
case ESC:
strcpy(userentry, "");
goto done;
break;
case 0x09: // Tab
if (prompt_for_name("Enter filename", 0) == 255)
goto restart; // ESC pressed
if (userentry[0] == '/') // Absolute path
goto done;
getcwd(linebuf, 80); // Otherwise relative path
strcat(linebuf, "/");
strcat(linebuf, userentry);
strcpy(userentry, linebuf);
strcpy(linebuf, "");
goto done;
}
}
done:
clrscr();
cursor(1);
}
/*
* Return pointer to start of the filename portion of a full path.
* /FOO/BAR/BAZ -> BAZ
*/
char *shortfilename(char *fullfilename) {
uint8_t i = 0;
int8_t lastslash = -1;
while (fullfilename[i]) {
if (fullfilename[i] == '/')
lastslash = i;
++i;
}
if (lastslash == -1)
return fullfilename;
return fullfilename + lastslash + 1;
}
/*
* Optionally attach files to outgoing email.
* filename - Name of file containing email message
*/
void attach(char *fname) {
FILE *fp, *fp2, *destfp;
uint16_t chars, i;
uint32_t size;
char *s, c;
struct attachinfo *a;
struct attachinfo *latest = NULL;
uint8_t attachcount = 0;
videomode(VIDEOMODE_80COL);
printf("%c%s ATTACHER%c\n\n", 0x0f, PROGNAME, 0x0e);
fp = fopen(fname, "rb+");
if (!fp)
error(ERR_FATAL, "Can't open %s", fname);
snprintf(filename, 80, "%s/OUTBOX/TMPFILE", cfg_emaildir);
_filetype = PRODOS_T_TXT;
_auxtype = 0;
destfp = fopen(filename, "wb");
if (!destfp)
error(ERR_FATAL, "Can't open TMPFILE");
printf(" Copying email content ... "); // Space is for spinner to eat
size = 0;
while ((chars = get_line(fp, linebuf, LINEBUFSZ)) != 0) {
size += chars;
if (linebuf[0] == '\r')
break;
fputs(linebuf, destfp);
spinner(size, 0);
}
fprintf(destfp, "MIME-Version: 1.0\r");
fprintf(destfp, "Content-Type: multipart/mixed; boundary=a2forever\r\r");
fprintf(destfp, "This is a multi-part message in MIME format.\r");
fprintf(destfp, "--a2forever\r");
fprintf(destfp, "Content-Type: text/plain; charset=US-ASCII\r");
fprintf(destfp, "Content-Transfer-Encoding: 7bit\r\r");
while ((chars = get_line(fp, linebuf, LINEBUFSZ)) != 0) {
size += chars;
fputs(linebuf, destfp);
spinner(size, 0);
}
spinner(size, 1);
while (1) {
cursor(0);
if (attachcount == 1)
printf("\n There is currently 1 attachment.\n\n", attachcount);
else
printf("\n There are currently %u attachments.\n\n", attachcount);
a = attachments;
i = 1;
if (attachcount > 0)
printf(" # Bytes Filename\n");
while (a) {
if (i == 13) {
printf(" < ... More Attachments, Not Shown ... >\n");
break;
}
printf("%3d %7lu %s\n", i++, a->size, a->filename);
a = a->next;
}
gotoxy(0, 21);
printf("%c A)dd attachment | D)one with attachments | %c", INVERSE, NORMAL);
ask:
c = cgetc();
if ((c == 'D') || (c == 'd'))
goto done;
if ((c != 'A') && (c != 'a')) {
beep();
goto ask;
}
snprintf(userentry, 80, "Attachment #%u : Select a File to Attach", attachcount + 1);
file_ui(userentry,
"",
" Select file from tree browser, or [Tab] to enter filename. [Esc] cancels.");
printf("%c%s ATTACHER%c\n\n", 0x0f, PROGNAME, 0x0e);
if (strlen(userentry) == 0) {
beep();
printf(" ** No file was selected!\n");
continue;
}
s = strrchr(userentry, '/');
if (!s)
s = userentry;
else
s = s + 1; // Character after the slash
if (strlen(s) == 0) {
beep();
sprintf(linebuf, " ** Illegal trailing slash '%s'!\n", userentry);
printf(linebuf);
continue;
}
fp2 = fopen(userentry, "rb");
if (!fp2) {
beep();
sprintf(linebuf, " ** Can't open '%s'!\n", userentry);
printf(linebuf);
continue;
}
fprintf(destfp, "\r--a2forever\r");
fprintf(destfp, "Content-Type: application/octet-stream\r");
fprintf(destfp, "Content-Transfer-Encoding: base64\r");
fprintf(destfp, "Content-Disposition: attachment; filename=%s;\r\r", s);
printf(" Attaching '%s' ... ", userentry); // Space is for spinner to eat
size = 0;
do {
i = fread(buf, 1, 72 * 3 / 4 * 5, fp2); // Multiple of 72*3/4 bytes
size += i;
if (i == 0)
break;
i = encode_base64(buf, buf + READSZ / 2, i);
i = fwrite(buf + READSZ / 2, 1, i, destfp);
spinner(size, 0);
} while (!feof(fp2));
fclose(fp2);
spinner(size, 1);
++attachcount;
if (!attachments)
attachments = latest = malloc(sizeof(struct attachinfo));
else {
latest->next = malloc(sizeof(struct attachinfo));
latest = latest->next;
}
strcpy(latest->filename, shortfilename(userentry));
latest->size = size;
latest->next = NULL;
}
done:
fprintf(destfp, "\r--a2forever--\r");
fclose(fp);
fclose(destfp);
if (unlink(fname))
error(ERR_FATAL, "Can't delete %s", fname);
if (rename(filename, fname))
error(ERR_FATAL, "Can't rename %s to %s", filename, fname);
}
/*
* Exec EMAIL.SYSTEM
*/
void load_email(void) {
revers(0);
clrscr();
chdir(cfg_instdir);
exec("EMAIL.SYSTEM", NULL);
}
void main(int argc, char *argv[]) {
readconfigfile();
if (argc == 2) {
quit_to_email = 1;
attach(argv[1]);
} else
error(ERR_FATAL, "No email file specified");
if (quit_to_email)
load_email();
}
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