78 lines
1.2 KiB
C
78 lines
1.2 KiB
C
#include <luna.h>
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#include <setjmp.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <unistd.h>
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int print_version()
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{
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char version[4096];
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FILE* fp = fopen("/dev/version", "r");
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if (!fp)
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{
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perror("fopen");
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return 1;
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}
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size_t nread = fread(version, 4096, 1, fp);
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if (ferror(fp))
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{
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perror("fread");
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return 1;
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}
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version[nread] = 0;
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if (fclose(fp) < 0)
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{
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perror("fclose");
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return 1;
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}
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printf("Your kernel version is %s\n\n", version);
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return 0;
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}
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int main()
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{
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if (getpid() != 1)
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{
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fprintf(stderr, "init should be started as PID 1\n");
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return 1;
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}
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printf("Welcome to Luna!\n");
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printf("Running as PID %ld\n", getpid());
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if (print_version()) return 1;
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sleep(1);
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pid_t child = fork();
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if (child < 0)
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{
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perror("fork");
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return 1;
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}
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if (child == 0)
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{
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execv("/bin/sh", NULL);
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perror("execv");
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return 1;
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}
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for (;;)
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{
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while (wait(NULL) == 0) // No child has exited yet
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{
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msleep(100);
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}
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}
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}
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