/* dos2unix.c - convert newline format * * Copyright 2012 Rob Landley <rob@landley.net> USE_DOS2UNIX(NEWTOY(dos2unix, 0, TOYFLAG_BIN)) USE_UNIX2DOS(NEWTOY(unix2dos, 0, TOYFLAG_BIN)) config DOS2UNIX bool "dos2unix/unix2dos" default y help usage: dos2unix [FILE...] Convert newline format from dos "\r\n" to unix "\n". If no files listed copy from stdin, "-" is a synonym for stdin. config UNIX2DOS bool "unix2dos" default y help usage: unix2dos [FILE...] Convert newline format from unix "\n" to dos "\r\n". If no files listed copy from stdin, "-" is a synonym for stdin. */ #define FOR_dos2unix #include "toys.h" GLOBALS( char *tempfile; ) static void do_dos2unix(int fd, char *name) { char c = toys.which->name[0]; int outfd = 1, catch = 0; if (fd) outfd = copy_tempfile(fd, name, &TT.tempfile); for (;;) { int len, in, out; len = read(fd, toybuf+(sizeof(toybuf)/2), sizeof(toybuf)/2); if (len<0) perror_msg("%s",name); if (len<1) break; for (in = out = 0; in < len; in++) { char x = toybuf[in+sizeof(toybuf)/2]; // Drop \r only if followed by \n in dos2unix mode if (catch) { if (c == 'u' || x != '\n') toybuf[out++] = '\r'; catch = 0; // Add \r only if \n not after \r in unix2dos mode } else if (c == 'u' && x == '\n') toybuf[out++] = '\r'; if (x == '\r') catch++; else toybuf[out++] = x; } xwrite(outfd, toybuf, out); } if (catch) xwrite(outfd, "\r", 1); if (fd) replace_tempfile(-1, outfd, &TT.tempfile); } void dos2unix_main(void) { loopfiles(toys.optargs, do_dos2unix); } void unix2dos_main(void) { dos2unix_main(); }