96 lines
2 KiB
C++
96 lines
2 KiB
C++
#include "shell.hpp"
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#include <unistd.h>
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#include <stdlib.h>
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#include <strings.h>
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#include <sys/wait.h>
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#include <errno.h>
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#include <signal.h>
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std::string ztd::sh(const std::string& command, bool to_console)
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{
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std::string ret;
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FILE *stream = popen(command.c_str(), "r");
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char* buff = NULL;
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size_t buff_size = 0;
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while (getline(&buff, &buff_size, stream) > 0)
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{
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if(to_console)
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{
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printf("%s", buff);
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}
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ret += buff;
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}
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pclose(stream);
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return ret;
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}
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FILE* ztd::popen2(const char* command, const char* type, int* pid)
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{
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const int READ=0, WRITE=1;
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pid_t child_pid;
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int fd[2];
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pipe(fd);
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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 ( index(type, 'r') != NULL )
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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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execl("/bin/sh", "/bin/sh", "-c", command, NULL);
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exit(0);
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}
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else
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{
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if ( index(type, 'r') != NULL )
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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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if(pid != NULL)
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*pid = child_pid;
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if ( index(type, 'r') != NULL )
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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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int ztd::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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