LXR toybox/toys/other/dos2unix.c

   1/* dos2unix.c - convert newline format
   2 *
   3 * Copyright 2012 Rob Landley <rob@landley.net>
   4
   5USE_DOS2UNIX(NEWTOY(dos2unix, 0, TOYFLAG_BIN))
   6USE_UNIX2DOS(NEWTOY(unix2dos, 0, TOYFLAG_BIN))
   7
   8config DOS2UNIX
   9  bool "dos2unix/unix2dos"
  10  default y
  11  help
  12    usage: dos2unix [FILE...]
  13
  14    Convert newline format from dos "\r\n" to unix "\n".
  15    If no files listed copy from stdin, "-" is a synonym for stdin.
  16
  17config UNIX2DOS
  18  bool "unix2dos"
  19  default y
  20  help
  21    usage: unix2dos [FILE...]
  22
  23    Convert newline format from unix "\n" to dos "\r\n".
  24    If no files listed copy from stdin, "-" is a synonym for stdin.
  25*/
  26
  27#define FOR_dos2unix
  28#include "toys.h"
  29
  30GLOBALS(
  31  char *tempfile;
  32)
  33
  34static void do_dos2unix(int fd, char *name)
  35{
  36  char c = toys.which->name[0];
  37  int outfd = 1, catch = 0;
  38
  39  if (fd) outfd = copy_tempfile(fd, name, &TT.tempfile);
  40
  41  for (;;) {
  42    int len, in, out;
  43
  44    len = read(fd, toybuf+(sizeof(toybuf)/2), sizeof(toybuf)/2);
  45    if (len<0) perror_msg_raw(name);
  46    if (len<1) break;
  47
  48    for (in = out = 0; in < len; in++) {
  49      char x = toybuf[in+sizeof(toybuf)/2];
  50
  51      // Drop \r only if followed by \n in dos2unix mode
  52      if (catch) {
  53        if (c == 'u' || x != '\n') toybuf[out++] = '\r';
  54        catch = 0;
  55      // Add \r only if \n not after \r in unix2dos mode
  56      } else if (c == 'u' && x == '\n') toybuf[out++] = '\r';
  57
  58      if (x == '\r') catch++;
  59      else toybuf[out++] = x;
  60    }
  61    xwrite(outfd, toybuf, out);
  62  }
  63  if (catch) xwrite(outfd, "\r", 1);
  64
  65  if (fd) replace_tempfile(-1, outfd, &TT.tempfile);
  66}
  67
  68void dos2unix_main(void)
  69{
  70  loopfiles(toys.optargs, do_dos2unix);
  71}
  72
  73void unix2dos_main(void)
  74{
  75  dos2unix_main();
  76}
  77