129 lines
3.0 KiB
C++
129 lines
3.0 KiB
C++
#include "mainwindow.h"
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using namespace std;
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#define READ 0
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#define WRITE 1
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//Take a string and explode it in array
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// s => string to explode
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// c => character separator
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// n => number of results in array, the last is the rest of string to end
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const vector<string> explode(const string& s, const char& c, int n = 0)
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{
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string buff;
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vector<string> v;
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size_t pos = 0;
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size_t ppos = 0;
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int i = 0;
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while (i < n - 1)
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{
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pos = s.find(c, ppos);
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if (pos != string::npos)
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{
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buff = s.substr(ppos, pos - ppos);
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if (buff != "")
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{
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i++;
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v.push_back(s.substr(ppos, pos - ppos));
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}
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ppos = pos + 1;
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}else
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{
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break;
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}
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}
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if (ppos < s.size())
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{
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v.push_back(s.substr(ppos));
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}
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return v;
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}
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// open a pipe, fork and return pid of child
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// argv => array of string with command in first and parameters following
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FILE * popen2(array<string,8> argv, string type, int & pid)
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{
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pid_t child_pid;
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int fd[2];
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QString message;
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string command;
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if (pipe(fd) == -1)
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{
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message = "Open pipe failed" + QString::fromStdString(strerror(errno));
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QMessageBox::warning(
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NULL,
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"RsyncUI",
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message);
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exit(-1);
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}else
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{
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if((child_pid = fork()) == -1)
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{
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perror("fork");
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exit(1);
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}
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/* child process */
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if (child_pid == 0)
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{
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if (type == "r")
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{
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close(fd[READ]); //Close the READ end of the pipe since the child's fd is write-only
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dup2(fd[WRITE], 1); //Redirect stdout to pipe
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}
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else
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{
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close(fd[WRITE]); //Close the WRITE end of the pipe since the child's fd is read-only
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dup2(fd[READ], 0); //Redirect stdin to pipe
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}
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setpgid(child_pid, child_pid); //Needed so negative PIDs can kill children of /bin/sh
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if (execlp(argv[0].c_str(), argv[0].c_str(), argv[1].c_str(), argv[2].c_str(), argv[3].c_str(), argv[4].c_str(), argv[5].c_str(), NULL ) == -1)
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exit (0);
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}
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else
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{
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if (type == "r")
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{
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close(fd[WRITE]); //Close the WRITE end of the pipe since parent's fd is read-only
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}
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else
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{
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close(fd[READ]); //Close the READ end of the pipe since parent's fd is write-only
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}
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}
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pid = child_pid;
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if (type == "r")
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{
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return fdopen(fd[READ], "r");
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}
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return fdopen(fd[WRITE], "w");
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}
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return 0;
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}
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// close pipe open by popen2 while pid is finished
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// fp => file pointer
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// pid => pid of the processus open bu popen2
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int pclose2(FILE * fp, pid_t pid)
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{
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int stat;
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fclose(fp);
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while (waitpid(pid, &stat, 0) == -1)
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{
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if (errno != EINTR)
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{
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stat = -1;
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break;
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}
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}
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return stat;
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}
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