// use dup() function when inplementation #include <unistd.h> // include dup() #include <stdio.h> #include <stdlib.h> #define OPEN_MAX 256 /* * when the descriptor is negative or greater than OPEN_MAX, will make a errro * */ int my_dup2(int fd, int newfd); int main(int...
Use the dup2 Function to Duplicate a File Descriptor in C Use the dup Function to Duplicate a File Descriptor in C This article will explain several methods of how to use the dup2 function in C. Use the dup2 Function to Duplicate a File Descriptor in C Files are usually manipulated ...
( If we are forking the descriptor is duplicated by default in the child process and the file table entry is also shared). That means we can have more than one file descriptor having possibly different attributes for one single open file table entry using dup/dup2 function. (Though seems...
using dup2if(dup2(file,1)<0){close(file);return1;// this can return 0 normally}//Now standard out has been redirected, we can write to// the filecout<<"This will print in myfile.txt"<<endl;//At the end the file has to be closed:close(file);return0;}//end of function ...
C نسخ int _dup( int fd ); int _dup2( int fd1, int fd2 ); Parametersfd, fd1 File descriptors referring to open file.fd2 Any file descriptor.Return value_dup returns a new file descriptor. _dup2 returns 0 to indicate success. If an error occurs, each function returns -1 ...
开发者ID:texlive,项目名称:texlive-source,代码行数:56,代码来源:mkocp.c 示例5: main ▲点赞 1▼ intmain(intargc,char**argv)#endif/* __APPLE__ */{boolcommit_dune_cfg =false;#ifdefined(_WIN32)#ifdefined(__MINGW32__) && defined(__STRICT_ANSI__)int__cdecl __MINGW_NOTHROW _fileno...
0 Unix C dup2 Question 1 daemon: closed stderr and accept(2) 1 read and write to the closed file descriptors 0 What is the practical use of F_DUPFD in fcntl function 0 stdin to parent process blocked when calling execv See more linked questions Related 0 Unix C dup2 Question...
The dup2() function was interrupted by a signal. Example CBC3BD06 /* CBC3BD06 This example duplicates an open file descriptor, using dup2(). */ #define _OPEN_SYS #include <errno.h> #include <fcntl.h> #include <sys/stat.h> #include <sys/types.h> #include <unistd.h> #undef _...
The Microsoft-implemented POSIX function namesdupanddup2are deprecated aliases for the_dupand_dup2functions. By default, they generateCompiler warning (level 3) C4996. The names are deprecated because they don't follow the Standard C rules for implementation-specific names. However, the functions ...
The Microsoft-implemented POSIX function namesdupanddup2are deprecated aliases for the_dupand_dup2functions. By default, they generateCompiler warning (level 3) C4996. The names are deprecated because they don't follow the Standard C rules for implementation-specific names. However, the functions ...