72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
#include <stdio.h>
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#include <unistd.h>
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#include <sys/wait.h>
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volatile int release_child_flag = 0;
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int main(int argc, char const *argv[])
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{
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pid_t child = fork();
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if (child == -1)
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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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{ // parent
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if (argc < 2)
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{
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fprintf(stderr, "Need pid filename.\n");
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return 2;
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}
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// Let the test suite know the child's pid.
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FILE *pid_file = fopen(argv[1], "w");
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if (pid_file == NULL)
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{
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perror("fopen");
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return 3;
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}
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fprintf(pid_file, "%d\n", child);
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if (fclose(pid_file) == EOF)
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{
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perror("fclose");
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return 4;
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}
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// And wait for the child to finish it's work.
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int status = 0;
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pid_t wpid = wait(&status);
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if (wpid == -1)
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{
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perror("wait");
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return 5;
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}
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if (wpid != child)
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{
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fprintf(stderr, "wait() waited for wrong child\n");
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return 6;
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}
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if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
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{
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fprintf(stderr, "child did not exit correctly\n");
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return 7;
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}
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}
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else
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{ // child
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lldb_enable_attach();
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while (! release_child_flag) // Wait for debugger to attach
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sleep(1);
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printf("Child's previous process group is: %d\n", getpgid(0));
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setpgid(0, 0); // Set breakpoint here
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printf("Child's process group set to: %d\n", getpgid(0));
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}
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return 0;
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}
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