38 lines
675 B
C
38 lines
675 B
C
// init: The initial user-level program
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#include "kernel/types.h"
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#include "kernel/stat.h"
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#include "user/user.h"
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#include "kernel/fcntl.h"
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char *argv[] = { "sh", 0 };
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int
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main(void)
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{
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int pid, wpid;
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if(open("console", O_RDWR) < 0){
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mknod("console", 1, 1);
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open("console", O_RDWR);
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}
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dup(0); // stdout
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dup(0); // stderr
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for(;;){
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printf(1, "init: starting sh\n");
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pid = fork();
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if(pid < 0){
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printf(1, "init: fork failed\n");
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exit();
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}
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if(pid == 0){
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exec("sh", argv);
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printf(1, "init: exec sh failed\n");
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exit();
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}
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while((wpid=wait()) >= 0 && wpid != pid)
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printf(1, "zombie!\n");
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}
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}
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