原文來自:https://msdn.microsoft.com/en-us/library/96ayss4b.aspx

_popen,_wpopen這是C運(yùn)行庫(當(dāng)然popen函數(shù)為L(zhǎng)inux C)

CreatePipe function這是API函數(shù)

system函數(shù)可以運(yùn)行命令行，并不能獲得顯示結(jié)果，執(zhí)行結(jié)果則是通過管道來完成的。首先用popen打開一個(gè)命令行的管道，然后通過fgets獲得該管道傳輸?shù)膬?nèi)容，也就是命令行運(yùn)行的結(jié)果

一、函數(shù)介紹

? 1._popen

FILE *_popen(const char *command,const char *mode ); FILE *wpopen(const wchar_t *command,const wchar_t *mode );mode:"r" The calling process can read the spawned command's stantard output using the returned stream"w" The calling process can write to the spawned command's standard input using the returned stream."b" Open in binary mode."t" Open in text mode.

? ?2._pclose

int _pclose(FILE *stream );

? ? ?Generic-Text Routine Mappings

Tchar.h routine	_UNICODE and _MBCS not defined	_MBCS defined	_UNICODE defined
_tpopen	_popen	_popen	_wpopen

二、案例

? 1._popen

#include "stdafx.h" #include "stdlib.h" int main() {FILE *fp;char buf[255] = {0};if ((fp = _popen("ipconfig", "r")) == NULL) {perror("Fail to popen\n");exit(1);}while (fgets(buf, 255, fp) != NULL) {printf("%s", buf);}_pclose(fp);return 0; }

? 2._wpopen

#include "stdafx.h" #include "stdlib.h" int main() {FILE *fp;char buf[255] = {0};if ((fp = _wpopen(_T("ipconfig"), _T("r"))) == NULL) {perror("Fail to popen\n");exit(1);}while (fgets(buf, 255, fp) != NULL) {printf("%s", buf);}_pclose(fp);return 0; }

?3.sample

//crt_popen.c /* This program uses _popen and _pclose to receive a * stream of text from a system process.*/#include <stdio.h> #include <stdlib.h>int main(void) {char psBuffer[128];FILE *pPipe;/*Run DIR so that it writes its output to a pipe. Open this* pipe with read text attribute so that we can read it * like a text file.*/if ((pPipe = _popen("dir *.c /on /p", "rt")) == NULL) exit(1);/*Read pipe until end of file, or an error occurs. */while (fgets(psBuffer, 128, pPipe)) {printf(psBuffer);}/*Close pipe and print return value of pPipe */if (feof(pPipe)) {printf("\nProcess returned %d\n", _pclose(pPipe));} else {printf("Error: Failed to read the pipe to the end.\n");} }Sample OutputThis output assumes that there is only one file in the current directory with a .c file name extension.Volume in drive C is CDRIVE Volume Serial Number is 0E17-1702 Directory of D:\proj\console\test1 07/17/98 07:26p 780 popen.c 1 File(s) 780 bytes 86,597,632 bytes free Process returned 0

參考：

http://www.linuxidc.com/Linux/2011-04/34092.htm

?

轉(zhuǎn)載鏈接:?https://blog.csdn.net/greless/article/details/72383762

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