8b58e81077
better parsing of sh commands (copied from jos sh) cat: read from 1 if no args sbrk system call, but untested getpid system call moved locks in keyboard intr, but why do we get intr w. null characters from keyboard?
44 lines
567 B
C
44 lines
567 B
C
#include "types.h"
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#include "stat.h"
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#include "user.h"
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char buf[513];
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void
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rfile(int fd)
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{
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int cc;
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while((cc = read(fd, buf, sizeof(buf) - 1)) > 0){
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buf[cc] = '\0';
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puts(buf);
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}
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if(cc < 0){
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puts("cat: read error\n");
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exit();
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}
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}
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int
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main(int argc, char *argv[])
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{
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int fd, i;
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if (argc <= 1) {
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rfile(0);
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} else {
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for(i = 1; i < argc; i++){
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fd = open(argv[i], 0);
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if(fd < 0){
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puts("cat: cannot open ");
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puts(argv[i]);
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puts("\n");
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exit();
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}
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rfile(fd);
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close(fd);
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}
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}
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exit();
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}
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