1 /* uuencode.c - uuencode / base64 encode 2 * 3 * Copyright 2013 Erich Plondke <toybox (at) erich.wreck.org> 4 * 5 * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/uuencode.html 6 7 USE_UUENCODE(NEWTOY(uuencode, "<1>2m", TOYFLAG_USR|TOYFLAG_BIN)) 8 9 config UUENCODE 10 bool "uuencode" 11 default y 12 help 13 usage: uuencode [-m] [file] encode-filename 14 15 Uuencode stdin (or file) to stdout, with encode-filename in the output. 16 17 -m base64-encode 18 */ 19 20 #define FOR_uuencode 21 #include "toys.h" 22 23 void uuencode_main(void) 24 { 25 char *name = toys.optargs[toys.optc-1], buf[(76/4)*3]; 26 27 int i, m = toys.optflags & FLAG_m, fd = 0; 28 29 if (toys.optc > 1) fd = xopen(toys.optargs[0], O_RDONLY); 30 31 base64_init(toybuf); 32 33 xprintf("begin%s 744 %s\n", m ? "-base64" : "", name); 34 for (;;) { 35 char *in; 36 37 if (!(i = xread(fd, buf, m ? sizeof(buf) : 45))) break; 38 39 if (!m) xputc(i+32); 40 in = buf; 41 42 for (in = buf; in-buf < i; ) { 43 int j, x, bytes = i - (in-buf); 44 45 if (bytes > 3) bytes = 3; 46 47 for (j = x = 0; j<4; j++) { 48 int out; 49 50 if (j < bytes) x |= (*(in++) & 0x0ff) << (8*(2-j)); 51 out = (x>>((3-j)*6)) & 0x3f; 52 xputc(m ? (j > bytes ? '=' : toybuf[out]) : (out ? out + 0x20 : 0x60)); 53 } 54 } 55 xputc('\n'); 56 } 57 xputs(m ? "====" : "end"); 58 } 59
