diff options
Diffstat (limited to 'catrw.c')
-rw-r--r-- | catrw.c | 39 |
1 files changed, 39 insertions, 0 deletions
@@ -0,0 +1,39 @@ +/* + * catrw.c -- open a file with O_RDWR and print it. + * + * This file is placed in the public domain. + */ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <fcntl.h> +#include <unistd.h> +#include <errno.h> + +#define BUFSIZE 4096 +char buf[BUFSIZE]; + +void catrw(int fd) { + int i; + for (;;) { + while ( (i = read(fd, buf, BUFSIZE)) < 0 && errno == EINTR) + ; + if (i <= 0) + break; + write(1, buf, i); + } +} + +int main(int argc, char *argv[]) { + int fd; + if (argc == 1) + catrw(0); + else { + while (--argc && (fd = open(*++argv, O_RDWR))) { + catrw(fd); + close(fd); + } + } + return 0; +} + |