1 /* dos2unix.c - convert newline format 2 * 3 * Copyright 2012 Rob Landley <rob@landley.net> 4 5 USE_DOS2UNIX(NEWTOY(dos2unix, 0, TOYFLAG_BIN)) 6 USE_UNIX2DOS(NEWTOY(unix2dos, 0, TOYFLAG_BIN)) 7 8 config 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 17 config 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 GLOBALS(char * tempfile;)30 GLOBALS( 31 char *tempfile; 32 ) 33 34 static 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 dos2unix_main(void)68 void dos2unix_main(void) 69 { 70 loopfiles(toys.optargs, do_dos2unix); 71 } 72 unix2dos_main(void)73 void unix2dos_main(void) 74 { 75 dos2unix_main(); 76 } 77