diff options
| -rw-r--r-- | toys/cat.c | 10 |
1 files changed, 7 insertions, 3 deletions
@@ -1,6 +1,6 @@ /* vi: set sw=4 ts=4: * - * hello.c - A hello world program. + * cat.c - copy inputs to stdout. * * Copyright 2006 Rob Landley <rob@landley.net> * @@ -14,6 +14,7 @@ config CAT help usage: cat [-u] [file...] Copy (concatenate) files to stdout. If no files listed, copy from stdin. + Filename "-" is a synonym for stdin. -u Copy one byte at a time (slow). */ @@ -25,8 +26,11 @@ static void do_cat(int fd, char *name) int len, size=toys.optflags ? 1 : sizeof(toybuf); for (;;) { - len = xread(fd, toybuf, size); - if (len<0) toys.exitval = EXIT_FAILURE; + len = read(fd, toybuf, size); + if (len<0) { + perror_msg("%s",name); + toys.exitval = EXIT_FAILURE; + } if (len<1) break; xwrite(1, toybuf, len); } |