xv6/cat.c
rtm 0e84a0ec6e fix race in holding() check in acquire()
give cpu1 a TSS and gdt for when it enters scheduler()
and a pseudo proc[] entry for each cpu
cpu0 waits for each other cpu to start up
read() for files
2006-08-08 19:58:06 +00:00

35 lines
520 B
C

#include "user.h"
char buf[513];
int
main(int argc, char *argv[])
{
int fd, i, cc;
if(argc < 2){
puts("Usage: cat files...\n");
exit();
}
for(i = 1; i < argc; i++){
fd = open(argv[i], 0);
if(fd < 0){
puts("cat: cannot open ");
puts(argv[i]);
puts("\n");
exit();
}
while((cc = read(fd, buf, sizeof(buf) - 1)) > 0){
buf[cc] = '\0';
puts(buf);
}
if(cc < 0){
puts("cat: read error\n");
exit();
}
close(fd);
}
exit();
}