mirror of https://github.com/polybar/polybar.git
93 lines
1.9 KiB
C++
93 lines
1.9 KiB
C++
#include <fcntl.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <fstream>
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#include "errors.hpp"
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#include "utils/factory.hpp"
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#include "utils/file.hpp"
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#include "utils/scope.hpp"
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POLYBAR_NS
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namespace file_util {
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/**
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* Destructor: close file handler
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*/
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file_ptr::~file_ptr() {
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if (m_ptr != nullptr) {
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fclose(m_ptr);
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}
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}
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/**
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* Logical operator testing if the file handler was created
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*/
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file_ptr::operator bool() {
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return m_ptr != nullptr;
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}
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/**
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* Call operator returning a pointer to the file handler
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*/
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FILE* file_ptr::operator()() {
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return m_ptr;
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}
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/**
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* Checks if the given file exist
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*/
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bool exists(const string& filename) {
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struct stat buffer;
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return stat(filename.c_str(), &buffer) == 0;
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}
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/**
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* Gets the contents of the given file
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*/
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string get_contents(const string& filename) {
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try {
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std::ifstream ifs(filename);
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string contents((std::istreambuf_iterator<char>(ifs)), (std::istreambuf_iterator<char>()));
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return contents;
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} catch (std::ios_base::failure& e) {
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return string{""};
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}
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}
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/**
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* Puts the given file descriptor into blocking mode
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*/
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void set_block(int fd) {
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int flags = fcntl(fd, F_GETFL, 0);
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flags &= ~O_NONBLOCK;
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if (fcntl(fd, F_SETFL, flags) == -1) {
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throw system_error("Failed to unset O_NONBLOCK");
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}
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}
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/**
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* Puts the given file descriptor into non-blocking mode
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*/
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void set_nonblock(int fd) {
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int flags = fcntl(fd, F_GETFL, 0);
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flags |= O_NONBLOCK;
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if (fcntl(fd, F_SETFL, flags) == -1) {
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throw system_error("Failed to set O_NONBLOCK");
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}
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}
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/**
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* Checks if the given file is a named pipe
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*/
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bool is_fifo(string filename) {
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auto fileptr = factory_util::unique<file_ptr>(filename);
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int fd = fileno((*fileptr)());
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struct stat statbuf;
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fstat(fd, &statbuf);
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return S_ISFIFO(statbuf.st_mode);
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}
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}
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POLYBAR_NS_END
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