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Redo menu.
[pintos-anon]
/
src
/
tests
/
userprog
/
shell.c
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#include <stdio.h>
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#include <syscall.h>
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int
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main (void)
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{
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for (;;)
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{
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char command[80], *cp;
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/* Prompt. */
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printf ("--");
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/* Read and echo command. */
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for (cp = command; cp < command + sizeof command - 1; cp++)
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{
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read (STDIN_FILENO, cp, 1);
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putchar (*cp);
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if (*cp == '\n')
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break;
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}
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*cp = '\0';
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/* Execute command. */
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if (cp > command)
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{
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pid_t pid = exec (command);
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if (pid != PID_ERROR)
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join (pid);
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else
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printf ("exec failed\n");
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}
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}
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}