popen使用方法示例

#include <stdio.h> #define CMD_MAX_LENS 256*100 static int GetCmdResult(const char* strCmd, char* strResult, unsigned int nSize) { if(strCmd == NULL || strResult == NULL) return -1; if(strResult) { FILE *fd; unsigned int ch,i; if((fd = popen(strCmd, "r")) == NULL) { printf("ERROR: get_system(%s)", strCmd); return -1; } for(i=0; i<nSize;i++) { if((ch = fgetc(fd)) != EOF) { strResult[i] = (char)ch; } else { break; } } pclose(fd); } return 0; } int main(int argc, char *argv[]) { char strCmdResult[CMD_MAX_LENS+1] = {0}; int ret = GetCmdResult("df -h", strCmdResult, CMD_MAX_LENS); if(ret == 0) { printf("cmd response:\n%s\n", strCmdResult); } return 0; }