Mercurial > hg > toybox
annotate toys/dos2unix.c @ 644:6a096902309d
Add dos2unix/unix2dos, remove old wrapper versions.
author | Rob Landley <rob@landley.net> |
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date | Mon, 30 Jul 2012 01:48:28 -0500 |
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Add dos2unix/unix2dos, remove old wrapper versions.
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1 /* vi: set sw=4 ts=4: |
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2 * |
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3 * dos2unix.c - convert newline format |
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4 * |
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5 * Copyright 2012 Rob Landley <rob@landley.net> |
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6 * |
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7 * No standard |
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8 |
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9 USE_DOS2UNIX(NEWTOY(dos2unix, NULL, TOYFLAG_BIN)) |
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10 USE_DOS2UNIX(OLDTOY(unix2dos, dos2unix, NULL, TOYFLAG_BIN)) |
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11 |
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12 config DOS2UNIX |
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13 bool "dos2unix/unix2dos" |
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14 default y |
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15 help |
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16 usage: dos2unix/unix2dos [file...] |
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17 |
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18 Convert newline format between dos (\r\n) and unix (just \n) |
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19 If no files listed copy from stdin, "-" is a synonym for stdin. |
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20 */ |
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21 |
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22 #include "toys.h" |
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23 |
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24 DEFINE_GLOBALS( |
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25 char *tempfile; |
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26 ) |
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27 |
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28 #define TT this.dos2unix |
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29 |
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30 static void do_dos2unix(int fd, char *name) |
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31 { |
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32 char c = toys.which->name[0]; |
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33 int outfd = 1, catch = 0; |
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34 |
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35 if (fd) outfd = copy_tempfile(fd, name, &TT.tempfile); |
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36 |
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37 for (;;) { |
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38 int len, in, out; |
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39 |
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40 len = read(fd, toybuf+(sizeof(toybuf)/2), sizeof(toybuf)/2); |
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41 if (len<0) { |
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42 perror_msg("%s",name); |
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43 toys.exitval = 1; |
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44 } |
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45 if (len<1) break; |
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46 |
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47 for (in = out = 0; in < len; in++) { |
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48 char x = toybuf[in+sizeof(toybuf)/2]; |
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49 |
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50 // Drop \r only if followed by \n in dos2unix mode |
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51 if (catch) { |
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52 if (c == 'u' || x != '\n') toybuf[out++] = '\r'; |
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53 catch = 0; |
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54 // Add \r only if \n not after \r in unix2dos mode |
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55 } else if (c == 'u' && x == '\n') toybuf[out++] = '\r'; |
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56 |
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57 if (x == '\r') catch++; |
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58 else toybuf[out++] = x; |
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59 } |
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60 xwrite(outfd, toybuf, out); |
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61 } |
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62 if (catch) xwrite(outfd, "\r", 1); |
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63 |
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64 if (fd) replace_tempfile(-1, outfd, &TT.tempfile); |
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65 } |
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66 |
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67 void dos2unix_main(void) |
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68 { |
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69 loopfiles(toys.optargs, do_dos2unix); |
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70 } |