cat.c (697B)
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#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
int
main(int argc, char **argv)
{
int fd = 0;
size_t len = 0;
char buf[LINE_MAX];
while (*(++argv) != NULL) {
/* if filename is "-", read file from stdin */
if ((*argv)[0] == '-' && (*argv)[1] == 0) {
fd = 0;
/* else, open the filename given as argument */
} else {
fd = open(*argv, O_RDONLY);
}
if (fd < 0) {
perror(*argv);
} else {
/* read file in chunks, and write them to stdout */
while ((len = read(fd, buf, LINE_MAX)) > 0) {
write(1, buf, len);
}
/* gracefully close file descriptor */
close(fd);
}
}
return 0;
}
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