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#include <unistd.h>
#include <stdio.h>
int main()
{
        const char* file1 = "access.cpp";
        const char* file2 = "access1.cpp";
        printf("%s:%d\n", file1, access(file1, F_OK));
        printf("%s:%d\n", file2, access(file2, F_OK));
        return 0;
}
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/boot/grub/grub.conf    GRUB configuration file
/boot/module-info-*    Module information for the Linux kernel
/boot/System.map-*    Map of the Linux kernel
/boot/vmlinuz-*    Linux kernel
/etc/aliases    Mail aliases
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#include <stdio.h>
#include <pthread.h>
#include <stdlib.h>
#include <unistd.h>
pthread_mutex_t wqy_mutex_pause = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t wqy_cond_pause = PTHREAD_COND_INITIALIZER;
bool wqy_pthread_pause = false;
void wqy_pthread_suspend(void)
{
if ......
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