Sponsored Content
Top Forums UNIX for Dummies Questions & Answers int open(const char *pathname, int flags, mode_t mode) doubt... Post 302145817 by csnmgeek on Thursday 15th of November 2007 09:31:19 AM
Old 11-15-2007
int open(const char *pathname, int flags, mode_t mode) doubt...

hello everybody!

I want to create a file with permissions for read, write, and execute to everybody using C, so I write this code:

Code:
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

int main(){
   int fileDescriptor;
   fileDescriptor = open("./NewFile", O_CREAT, S_IRWXU|S_IRWXG|S_IRWXO );
   printf("File Descriptor: %d\n", fileDescriptor);
   close(fileDescriptor);

   return 0;
}

I expected to have the following result:

$ ls -l NewFile
-rwxrwxrwx 1 csnmgeek csnmgeek 0 2007-11-15 09:23 NewFile

but instead I got this:

$ ls -l NewFile
-rwxr-xr-x 1 csnmgeek csnmgeek 0 2007-11-15 09:23 NewFile

Can you tell me where is the problem?
regards
jorge
 

10 More Discussions You Might Find Interesting

1. Programming

difference between int ** func() and int *& func()

What is the difference between int** func() and int*& func(). Can you please explain it with suitable example. Thanks, Devesh. (1 Reply)
Discussion started by: devesh
1 Replies

2. Red Hat

cast from const void* to unsigned int loses precision

Hello everey one, here i am attempting to compile a c++ project .it's throughing the following errors. my machine details are as follows: Linux chmclozr0119 2.6.18-53.el5 #1 SMP Wed Oct 10 16:34:19 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux errors: ===== Generating... (0 Replies)
Discussion started by: mannam srinivas
0 Replies

3. Programming

How to read flags from mode_t type?

Hello, After, I stat() a file, how can I read the various permissions flags from the st_mode variable which is of type mode_t? I would like to do something like: struct stat *perms; int res = stat(filename, perms); if(perms->st.mode == S_IROTH) do something; but I know that is the wrong... (2 Replies)
Discussion started by: pallak7
2 Replies

4. Programming

concat const char * with char *

hello everybody! i have aproblem! i dont know how to concatenate const char* with char const char *buffer; char *b; sprintf(b,"result.txt"); strcat(buffer,b); thanx in advance (4 Replies)
Discussion started by: nicos
4 Replies

5. Programming

conversion to 'char' from 'int' warning

Hi, I wrote a simple code in C++ converting from UpperToLower case characters. However, my compiler gives me a warning: "warning: conversion to 'char' from 'int' may alter its value". Any tips? I would like to stress, I don't want to load my string into char array. int ToLower(string... (4 Replies)
Discussion started by: kajolo
4 Replies

6. Programming

Handle int listen(int sockfd, int backlog) in TCP

Hi, from the manual listen(2): listen for connections on socket - Linux man page It has a parameter called backlog and it limits the maximum length of queue of pending list. If I set backlog to 128, is it means no more than 128 packets can be handled by server? If I have three... (3 Replies)
Discussion started by: sehang
3 Replies

7. Programming

C++ program is crashing on re-assigning const static member variable using an int pointer

Hi, Can any one tell me why my following program is crashing? #include <iostream> using namespace std; class CA { public: const static int i; }; const int CA::i = 10; int main() { int* pi = const_cast<int*>(&CA::i); *pi = 9; cout << CA::i << endl; } (6 Replies)
Discussion started by: royalibrahim
6 Replies

8. Programming

error: invalid conversion from ‘const char*’ to ‘char*’

Compiling xpp (The X Printing Panel) on SL6 (RHEL6 essentially): xpp.cxx: In constructor ‘printFiles::printFiles(int, char**, int&)’: xpp.cxx:200: error: invalid conversion from ‘const char*’ to ‘char*’ The same error with all c++ constructors - gcc 4.4.4. If anyone can throw any light on... (8 Replies)
Discussion started by: GSO
8 Replies

9. Programming

Help with understanding ( int, char, long, short, signed, unsigned etc.... )

My question is simple: When should I use a long, int, char, unsigned/signed variables?? When I declare a variable "unsigned;" what did I do it??? Why would I delcare an integer "long" or "short" ( unsigned or signed)?? Any examples of when things like "unsigned", "long", "short" etc...... (6 Replies)
Discussion started by: cpp_beginner
6 Replies

10. Programming

Small query regarding function "char * strerror(int errnum)"

As this function returns the address of the string corressponding to the errno value provided to it. Can someone please let me know where, in the memory, it could be (on freeBSD). The MAN page tells under the BUG section that "For unknown error numbers, the strerror() function will return its... (5 Replies)
Discussion started by: Praveen_218
5 Replies
stat.h(3HEAD)							      Headers							     stat.h(3HEAD)

NAME
stat.h, stat - data returned by stat system call SYNOPSIS
#include <sys/types.h> #include <sys/stat.h> DESCRIPTION
The system calls stat, lstat and fstat return data in a stat structure, which is defined in <stat.h>. The constants used in the st_mode field are also defined in this file: #define S_IFMT /* type of file */ #define S_IAMB /* access mode bits */ #define S_IFIFO /* fifo */ #define S_IFCHR /* character special */ #define S_IFDIR /* directory */ #define S_IFNAM /* XENIX special named file */ #define S_INSEM /* XENIX semaphore subtype of IFNAM */ #define S_INSHD /* XENIX shared data subtype of IFNAM */ #define S_IFBLK /* block special */ #define S_IFREG /* regular */ #define S_IFLNK /* symbolic link */ #define S_IFSOCK /* socket */ #define S_IFDOOR /* door */ #define S_ISUID /* set user id on execution */ #define S_ISGID /* set group id on execution */ #define S_ISVTX /* save swapped text even after use */ #define S_IREAD /* read permission, owner */ #define S_IWRITE /* write permission, owner */ #define S_IEXEC /* execute/search permission, owner */ #define S_ENFMT /* record locking enforcement flag */ #define S_IRWXU /* read, write, execute: owner */ #define S_IRUSR /* read permission: owner */ #define S_IWUSR /* write permission: owner */ #define S_IXUSR /* execute permission: owner */ #define S_IRWXG /* read, write, execute: group */ #define S_IRGRP /* read permission: group */ #define S_IWGRP /* write permission: group */ #define S_IXGRP /* execute permission: group */ #define S_IRWXO /* read, write, execute: other */ #define S_IROTH /* read permission: other */ #define S_IWOTH /* write permission: other */ #define S_IXOTH /* execute permission: other */ The following macros are for POSIX conformance (see standards(5)): #define S_ISBLK(mode) block special file #define S_ISCHR(mode) character special file #define S_ISDIR(mode) directory file #define S_ISFIFO(mode) pipe or fifo file #define S_ISREG(mode) regular file #define S_ISSOCK(mode) socket file ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ SEE ALSO
stat(2), types.h(3HEAD), attributes(5), standards(5) SunOS 5.10 30 Aug 2002 stat.h(3HEAD)
All times are GMT -4. The time now is 05:05 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy