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#include <stdlib.h>
#include <stdio.h>
#include <sys/ptrace.h>
#include <sys/wait.h>
#include <unistd.h>
#define ERROR(...) \
do { \
fprintf(stderr, __VA_ARGS__); \
exit(1); \
} while (0)
#define LOG(...) \
fprintf(stderr, __VA_ARGS__)
int main(int argc, char *argv[])
{
if (argc < 2) {
ERROR("Usage: %s <tracee_pid>\n", argv[0]);
}
int pid;
if ((pid = atoi(argv[1])) == 0) {
ERROR("Invalid pid '%s'\n", argv[1]);
}
ptrace(PTRACE_ATTACH, pid, NULL, NULL);
waitpid(pid, NULL, __WALL);
LOG("Attached to process %d\n", pid);
/* Do stuff ... */
sleep(5);
ptrace(PTRACE_DETACH, pid, NULL, NULL);
LOG("Detached from process %d\n", pid);
return 0;
}
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