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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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access.cpp:0
access1.cpp:-1


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-qa | grep vnc
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Linux Shell »·¾³ÖÐÖ§³ÖÊäÈëÊä³öÖØ¶¨Ïò£¬Ó÷ûºÅ<ºÍ>À´±íʾ¡£0¡¢1ºÍ2·Ö±ð±íʾ±ê×¼ÊäÈë¡¢±ê×¼Êä³öºÍ±ê×¼´íÎóÐÅÏ¢Êä³ö£¬¿ÉÒÔÓÃÀ´Ö¸¶¨ÐèÒªÖØ¶¨ÏòµÄ±ê×¼ÊäÈë»òÊä³ö£¬±ÈÈç 2>a.txt ±íʾ½«´íÎóÐÅÏ¢Êä³öµ½Îļþa.txtÖС£
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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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