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84 lines
1.4 KiB
84 lines
1.4 KiB
#include "webfuse/util/authenticator.hpp"
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#include <unistd.h>
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#include <sys/wait.h>
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#include <fcntl.h>
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#ifndef closefrom
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namespace
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{
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void closefrom(int fd)
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{
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int const max_fd = sysconf(_SC_OPEN_MAX);
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for(int i = fd; i < max_fd; i++)
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{
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close(i);
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}
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}
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}
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#endif
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namespace webfuse
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{
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authenticator::authenticator(std::string const & app)
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: app_(app)
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{
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}
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bool authenticator::authenticate(std::string const & token)
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{
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bool result = false;
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int fds[2];
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int const rc = pipe(fds);
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if (0 != rc)
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{
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return false;
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}
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pid_t const pid = fork();
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if (pid == 0)
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{
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// child
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close(STDIN_FILENO);
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dup2(fds[0], STDIN_FILENO);
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// prepare file descriptors
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closefrom(1);
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open("/dev/null", O_WRONLY);
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dup2(STDOUT_FILENO, STDERR_FILENO);
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execl(app_.c_str(), app_.c_str(), nullptr);
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exit(EXIT_FAILURE);
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}
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else if (pid > 0)
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{
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write(fds[1], reinterpret_cast<void const*>(token.c_str()), token.size());
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close(fds[1]);
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// parent
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int exit_status = EXIT_FAILURE;
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int status = 0;
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int const rc = waitpid(pid, &status, 0);
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if (rc == pid)
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{
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exit_status = WEXITSTATUS(status);
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}
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close(fds[0]);
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result = (exit_status == EXIT_SUCCESS);
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}
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return result;
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}
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}
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