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#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
#include "globals.h"
#include "mbox.h"
int count( struct mbox_struct * mb ) {
FILE * f = 0;
/* Usually the e-mails are wrapped at most at column 79
* This length will speed things up */
char line[81] = "";
int ctotal = 0;
int cnew = 0;
int status_line;
if ( (f = fopen(mb->file, "r")) == NULL ) {
return(-1);
}
while ( fgets(line, 80, f) ) {
if (!strncmp(line, "From ", 5)) {
++ctotal;
++cnew;
status_line = 0;
} else if ( ! status_line ) {
if ( !strncmp(line, "Status: ", 8) ) {
status_line = 1;
if (mb->flags & FLAG_UNREAD_AS_NEW) {
if (!strncmp(line, "Status: RO", 10))
--cnew;
} else if (!strncmp(line, "Status: R", 9)) {
--cnew;
}
}
}
while ( !strchr(line, '\n') && fgets(line, 80, f) ) {
}
}
fclose(f);
if ( (mb->cnew != cnew) && (cnew != 0) ) {
pthread_mutex_lock(&mb->mutex);
mb->flags |= FLAG_ARRIVED;
pthread_mutex_unlock(&mb->mutex);
}
mb->ctotal = ctotal;
mb->cnew = cnew;
return(0);
}
void mbox_handle( struct mbox_struct * mb ) {
struct stat stat_buf;
/* Since we never really intend to quit this function,
* all "global" stuff may go on the stack here */
time_t mod_time = 0;
off_t last_size = 0;
if ( ! strlen(mb->file) ) {
printf("asmail: mbox_handle: no mailbox file specified.\n");
mb->status = STAT_FAIL;
signal_update();
pthread_exit(NULL);
}
while (1) {
mb->status |= STAT_RUN;
signal_update();
if ( stat(mb->file, &stat_buf) ) {
/* Yes, we have to keep trying. The mailbox
* may be on a filesystem that experiences
* problems, like NFS. */
printf("asmail: mbox_handle: stat (%s) failed.\n",
mb->file);
mb->status = STAT_FAIL;
signal_update();
} else {
/* It seems that mod_time is not quite a reliable
* source of file modification check. Let's try
* to use other sources of information too. */
if ( ( stat_buf.st_ctime != mod_time ) ||
( stat_buf.st_size != last_size ) ) {
mod_time = stat_buf.st_ctime;
last_size = stat_buf.st_size;
if (count(mb)) {
mb->status = STAT_FAIL;
signal_update();
} else {
mb->status = STAT_IDLE;
if ( mb->cnew > 0)
mb->mail = MAIL_NEW;
else if ( mb->ctotal > 0 )
mb->mail = MAIL_OLD;
else
mb->mail = MAIL_NONE;
signal_update();
}
} else {
mb->status = STAT_IDLE;
signal_update();
}
}
sleep_check(mb->update);
}
}
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