diff options
Diffstat (limited to 'libstdc++-v3/config/io/basic_file_stdio.cc')
| -rw-r--r-- | libstdc++-v3/config/io/basic_file_stdio.cc | 86 |
1 files changed, 70 insertions, 16 deletions
diff --git a/libstdc++-v3/config/io/basic_file_stdio.cc b/libstdc++-v3/config/io/basic_file_stdio.cc index ff23d983ae8..a0947bf3dd5 100644 --- a/libstdc++-v3/config/io/basic_file_stdio.cc +++ b/libstdc++-v3/config/io/basic_file_stdio.cc @@ -34,6 +34,29 @@ #include <bits/basic_file.h> #include <fcntl.h> +#ifdef _GLIBCPP_HAVE_SYS_IOCTL_H +#define BSD_COMP /* Get FIONREAD on Solaris2. */ +#include <sys/ioctl.h> +#endif + +// Pick up FIONREAD on Solaris 2.5. +#ifdef _GLIBCPP_HAVE_SYS_FILIO_H +#include <sys/filio.h> +#endif + +#ifdef _GLIBCPP_HAVE_POLL +#include <poll.h> +#endif + +#if defined(_GLIBCPP_HAVE_S_ISREG) || defined(_GLIBCPP_HAVE_S_IFREG) +# include <sys/stat.h> +# ifdef _GLIBCPP_HAVE_S_ISREG +# define _GLIBCPP_ISREG(x) S_ISREG(x) +# else +# define _GLIBCPP_ISREG(x) (((x) & S_IFMT) == S_IFREG) +# endif +#endif + namespace std { // Definitions for __basic_file<char>. @@ -74,7 +97,7 @@ namespace std if (__testi && !__testo && !__testt && !__testa) { strcpy(__c_mode, "r"); - __p_mode |= O_RDONLY | O_NONBLOCK; + __p_mode |= O_RDONLY; } if (__testi && __testo && !__testt && !__testa) { @@ -150,11 +173,6 @@ namespace std if ((_M_cfile = fopen(__name, __c_mode))) { _M_cfile_created = true; - - // Set input to nonblocking for fifos. - if (__mode & ios_base::in) - fcntl(this->fd(), F_SETFL, O_NONBLOCK); - __ret = this; } } @@ -175,12 +193,12 @@ namespace std __basic_file* __retval = static_cast<__basic_file*>(NULL); if (this->is_open()) { - fflush(_M_cfile); - if ((_M_cfile_created && fclose(_M_cfile) == 0) || !_M_cfile_created) - { - _M_cfile = 0; - __retval = this; - } + if (_M_cfile_created) + fclose(_M_cfile); + else + fflush(_M_cfile); + _M_cfile = 0; + __retval = this; } return __retval; } @@ -197,18 +215,54 @@ namespace std __basic_file<char>::seekoff(streamoff __off, ios_base::seekdir __way, ios_base::openmode /*__mode*/) { - fseek(_M_cfile, __off, __way); - return ftell(_M_cfile); + if (!fseek(_M_cfile, __off, __way)) + return ftell(_M_cfile); + else + // Fseek failed. + return -1L; } streamoff __basic_file<char>::seekpos(streamoff __pos, ios_base::openmode /*__mode*/) { - fseek(_M_cfile, __pos, ios_base::beg); - return ftell(_M_cfile); + if (!fseek(_M_cfile, __pos, ios_base::beg)) + return ftell(_M_cfile); + else + // Fseek failed. + return -1L; } int __basic_file<char>::sync() { return fflush(_M_cfile); } + + streamsize + __basic_file<char>::showmanyc_helper() + { +#ifdef FIONREAD + // Pipes and sockets. + int __num = 0; + int __r = ioctl(this->fd(), FIONREAD, &__num); + if (!__r && __num >= 0) + return __num; +#endif + +#ifdef _GLIBCPP_HAVE_POLL + // Cheap test. + struct pollfd __pfd[1]; + __pfd[0].fd = this->fd(); + __pfd[0].events = POLLIN; + if (poll(__pfd, 1, 0) <= 0) + return 0; +#endif + +#if defined(_GLIBCPP_HAVE_S_ISREG) || defined(_GLIBCPP_HAVE_S_IFREG) + // Regular files. + struct stat __buffer; + int __ret = fstat(this->fd(), &__buffer); + if (!__ret && _GLIBCPP_ISREG(__buffer.st_mode)) + return __buffer.st_size - ftell(_M_cfile); +#endif + return 0; + } } // namespace std |