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Re: What is difference between file descriptor and file pointer 13 Years Ago by karthikvb17 File pointer: 1.It is high level interface 2.Passed to … and EOF detection,etc. 4.Provides higher portability and effeciency. File descriptor: 1.Low/Kernel level handler 2.passe to read() and… Calling fdopen: Bad file Descriptor and Undefined reference 14 Years Ago by beatenbob …* next;[/CODE] respectively. However, I got bad file descriptor error. I tried switching the order of the 2…5: DivisionNode.h:4:26: calling fdopen: Bad file descriptor In file included from EmployeeList.h:5: DivisionNode.h:42: …h:5: EmployeeList.h:4:26: calling fdopen: Bad file descriptor Beaten@Beaten-PC ~ $ g++ DivisionNode.cpp /cygdrive/… Re: Opening a file and echoing the contents from it to the file descriptor 13 Years Ago by Narue A file descriptor is conceptually much like the FILE pointer you use in standard C. In fact, on systems that use file descriptors (such as… the easiest way to handle the file descriptor. What fdopen() does is create a FILE pointer from a file descriptor. Then you can use it… Opening a file and echoing the contents from it to the file descriptor 13 Years Ago by purpleturtle_97 …a character at a time to a socket file descriptor. The code below will hopefully help you …[CODE] void echoFile(int fd, char *filename) { // file pointer FILE* fp; // open 'filename' and assign the pointer if((…read each character from 'filename' to the file descriptor while(getc(fp) != EOF) { } } [/CODE] What is difference between file descriptor and file pointer 17 Years Ago by varsha0702 Can any body tell me the difference between file descriptor and filepointer in C on linux? and when to use what? Bad file descriptor 17 Years Ago by daviddoria … get this: MayaFunctions.h:5:27: error: calling fdopen: Bad file descriptor in that line, I simply have #include "AnotherFile.h… File descriptors 14 Years Ago by kshitij tyagi Hi all.. I want to know the file descriptor of a file that I have opened in my program. I know open(char*,int,int) returns a file descriptor. What if use fstream out("...").. Is there any way to know the file descriptor this way?? thnx. Re: File descriptors 14 Years Ago by kshitij tyagi (: [...I'm not gonna take over the world with it..!!] I want to try out mmap() function.. and it requires me to specify a file descriptor to the file which is to be mapped... so, if I had the information, I'll put it inside mmap().. Re: What is difference between file descriptor and file pointer 17 Years Ago by Salem The descriptor is what is returned by open() and passed to close(), read(), write() etc. It is what identifies the open file. The filepointer is the location within the file where the next read/write operation will take place. You can modify it by using say lseek(). Re: File descriptors 18 Years Ago by Rashakil Fol In UNIX-like systems, a file descriptor is a small integer associated with an open file stream. You can use procedures like … to do this, you need to provide the file descriptor for the open file you want written to. The procedure open is… it returns the integer that should be used as the file descriptor (or in case of error, returns -1). The … Re: FILE and iostream 17 Years Ago by vijayan121 … contain stream/streambuf derived classes which use a file descriptor/HANDLE. Boost is widely portable, so we …gt; #include <iostream> int main() { FILE* file = fopen( "/tmp/file.txt", "w" ) ; int fd…amp; std_ostm = ofstm ; std_ostm << "FILE* " << file << " fd: " <<… Re: FILE and iostream 15 Years Ago by jd's [QUOTE=edek;588748]Is it possible to convert [ICODE]std::FILE*[/ICODE] to [ICODE]iostream[/ICODE]?[/QUOTE] Sure, using gnu's … or who-knows ... // let's build a buffer from the FILE* descriptor ... __gnu_cxx::stdio_filebuf pipe_buf (f_pipe_in, ios_base::in); // there we are, a… Re: File handling issue.. 14 Years Ago by NicAx64 …maintains a internal data-structure to every file that we opened.the integer file descriptor is just an index to that huge… you need to to synchronized IO then open the file in synchronized mode. When the application exits normally the… kernel will close the file handlers, but if it exists abnormally you can't… Re: File Writing Delay? 15 Years Ago by SoulMazer … greeted with the following error: [quote]IOError: [Errno 9] Bad file descriptor[/quote] Re: File descriptors 16 Years Ago by verruckt24 To detail on this, in Unix-based systems, all the open file handles are stored in an array internal to the system. The file descriptor so returned is the index of the array position where the file handle is stored. Re: File descriptors 16 Years Ago by eggi … basicly, it's an integer used to identy an open file in a process. In Unix/Linux/Posix 0, 1 and…) and STDERR (standard error), in that order. The integer (of file descriptor) are required as arguments to read, write and close operations… MIPS project. Checksum of file. 11 Years Ago by ppajak … # type: word jal print_hex close: li $v0, 16 # close file syscall lw $a0, descriptor # the file descriptor syscall b get_filename # loop to process another… Writing Integers to a File (MIPS Assembly) 12 Years Ago by emorales … is ignored syscall # open a file (file descriptor returned in $v0) move $s6, $v0 # save the file descriptor ############################################################### # Write to file just opened li $v0, 15… Re: Writing Integers to a File (MIPS Assembly) 12 Years Ago by Schol-R-LEA … is ignored syscall # open a file (file descriptor returned in $v0) move $s6, $v0 # save the file descriptor ############################################################### # Write to file just opened li $v0, 15… Iterating file descriptors from select function 14 Years Ago by Mr68360 …i) { if (FD_ISSET(i, &temp_fd_set)) { // a read on file descriptor i } ... } [/CODE] It seems to me that if I had…*iter; if (FD_ISSET(i, &temp_fd_set)) { // a read on file descriptor i } ... } [/CODE] Does anyone know if it is [I]required… error in deleting a file.. 16 Years Ago by vjp08 …in function 'file'. after reading data from that file, i closed the file descriptor and tried to delete the file but it …gives an error that file is … Following is the part of my script... temp_file = file("temp_file.txt",'r') while("some condition&… help writing bmp file in mips 10 Years Ago by mnkyskilz …program write_file: move $a0, $v0 # file descriptor li $v0, 15 # write to file la $a1, bmpheader # file buffer li $a2, 62 # number of…exit # exit the program close_file: li $v0, 16 # close file syscall syscall li $v0, 4 # print string la $a0, … How to check if a named pipe(file) is empty 15 Years Ago by chunalt787 … empty before I read? Its just a file and I have a file descriptor so checking the file would probably work as well. I… How to run a java file that creaded in Ntebeans in console 14 Years Ago by Kamal_Java …(Calculator) application in Netbeans.Now i want to run that file from console(putty) since i gonna use that .java class… this . When i try to run the java file directly it throws "Bad file descriptor" error . Can any one help me Re: How to run a java file that creaded in Ntebeans in console 13 Years Ago by 918_Nix …(Calculator) application in Netbeans.Now i want to run that file from console(putty) since i gonna use that .java class… this . When i try to run the java file directly it throws "Bad file descriptor" error . Can any one help me… Re: File descriptors 14 Years Ago by arkoenig But mmap() is not part of C++. For that matter, neither are file descriptors. So what you're really saying is that you want to use information that your particular implementation provides in an implementation-dependent way. Which means that the answer to your question relies on the details of your implementation. Re: File descriptors 14 Years Ago by kshitij tyagi ok... is there any specific reason that file descriptors are not a part of c++?? and..if i want to do something like mmap() in c++, what should i do? Re: File descriptors 14 Years Ago by arkoenig …=kshitij tyagi;1272536]ok... is there any specific reason that file descriptors are not a part of c++?? and..if i… something like mmap() in c++, what should i do?[/QUOTE] File descriptors are not part of C++ because if they were… Re: Calling fdopen: Bad file Descriptor and Undefined reference 14 Years Ago by Ancient Dragon >>$ g++ EmployeeList.h You can't compile header files like that [icode]g++ EmployeeList.cpp[/icode] Re: Calling fdopen: Bad file Descriptor and Undefined reference 14 Years Ago by beatenbob Just figured out where my problem is. Thanks! Problem solved.