+static char mutt_normalized_char(char c) {
+ if (isalnum(c))
+ return c;
+ if (strchr(".!#$%&'*+-/=?^_`{|}~",c))
+ return c;
+ return '.'; /* normalized character (we're stricter than RFC2822, 3.6.4) */
+}
+
+static void mutt_gen_localpart(char * buf, unsigned int len, char * fmt) {
+ time_t now;
+ struct tm *tm;
+ char tmp[SHORT_STRING];
+
+ *buf = '\0';
+
+ now = time (NULL);
+ tm = gmtime (&now);
+
+ for (;*fmt;++fmt) {
+ if (*fmt == '%') {
+ switch (fmt[1]) {
+ case 0:
+ return;
+ case 'd':
+ snprintf(tmp,sizeof(tmp),"%02d",tm->tm_mday);
+ safe_strncat(buf,len,tmp,2);
+ break;
+ case 'h':
+ snprintf(tmp,sizeof(tmp),"%02d",tm->tm_hour);
+ safe_strncat(buf,len,tmp,2);
+ break;
+ case 'm':
+ snprintf(tmp,sizeof(tmp),"%02d",tm->tm_mon+1);
+ safe_strncat(buf,len,tmp,2);
+ break;
+ case 'M':
+ snprintf(tmp,sizeof(tmp),"%02d",tm->tm_min);
+ safe_strncat(buf,len,tmp,2);
+ break;
+ case 'O':
+ snprintf(tmp,sizeof(tmp),"%lo",(unsigned long)now);
+ safe_strncat(buf,len,tmp,strlen(tmp));
+ break;
+ case 'p':
+ snprintf(tmp,sizeof(tmp),"%u",(unsigned int)getpid());
+ safe_strncat(buf,len,tmp,strlen(tmp));
+ break;
+ case 'P':
+ snprintf(tmp,sizeof(tmp),"%c",MsgIdPfx);
+ MsgIdPfx = (MsgIdPfx == 'Z') ? 'A' : MsgIdPfx + 1;
+ safe_strncat(buf,len,tmp,1);
+ break;
+ case 'r':
+ snprintf(tmp,sizeof(tmp),"%u",(unsigned int)rand());
+ safe_strncat(buf,len,tmp,strlen(tmp));
+ break;
+ case 'R':
+ snprintf(tmp,sizeof(tmp),"%x",(unsigned int)rand());
+ safe_strncat(buf,len,tmp,strlen(tmp));
+ break;
+ case 's':
+ snprintf(tmp,sizeof(tmp),"%02d",tm->tm_sec);
+ safe_strncat(buf,len,tmp,2);
+ break;
+ case 'T':
+ snprintf(tmp,sizeof(tmp),"%u",(unsigned int)now);
+ safe_strncat(buf,len,tmp,strlen(tmp));
+ break;
+ case 'X':
+ snprintf(tmp,sizeof(tmp),"%x",(unsigned int)now);
+ safe_strncat(buf,len,tmp,strlen(tmp));
+ break;
+ case 'Y':
+ snprintf(tmp,sizeof(tmp),"%04d",tm->tm_year+1900); /* this will break in the year 10000 ;-) */
+ safe_strncat(buf,len,tmp,4);
+ break;
+ case '%':
+ safe_strncat(buf,len,"%",1);
+ break;
+ default:
+ safe_strncat(buf,len,".",1); /* invalid formats are replaced by '.' */
+ } /* switch */
+ ++fmt;
+ } else {
+ char c;
+ c = mutt_normalized_char(*fmt); /* @todo: filter out invalid characters */
+ safe_strncat(buf,len,&c,1);
+ }
+ }
+}
+