55 lines
858 B
C
55 lines
858 B
C
#include "types.h"
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#include "stat.h"
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#include "user.h"
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#include "fs.h"
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#include "fcntl.h"
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char *args[100];
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void parse(char buf[]);
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int
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main(void)
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{
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char buf[128];
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int pid;
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while(1){
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puts("$ ");
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memset (buf, '\0', sizeof(buf));
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gets(buf, sizeof(buf));
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if(buf[0] == '\0')
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continue;
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pid = fork();
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if(pid == 0){
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parse(buf);
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if (buf[0] == 'c' && buf[1] == 'd' && buf[2] == '\0') { // cd
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chdir(&buf[3]);
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} else {
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exec(buf, args);
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printf(1, "%s: not found\n", buf);
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exit();
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}
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}
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if(pid > 0)
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wait();
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}
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}
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void
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parse(char buf[])
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{
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int j = 1;
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int i;
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args[0] = buf;
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for (i = 0; buf[i] != '\0'; i++) {
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if (buf[i] == ' ') {
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buf[i] = '\0';
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args[j++] = buf + i + 1;
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if (j >= 100) {
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printf(2, "too many args\n");
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exit();
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}
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}
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}
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args[j] = '\0';
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}
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