Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Concatenating Struct Value With Char In C
Top Forums Programming Concatenating Struct Value With Char In C Post 302974384 by Azrael on Sunday 29th of May 2016 11:04:33 PM
Old 05-30-2016
I must apologize, I meant to take out &str before posting this. I knew it did not work, but before asking for help I went through a phase of trying to brute-force something that would work.

I kept the character arrays small to try and keep things lean. I guess that was wishful thinking. I went ahead and bumped them all up to at least 20, but saw no change.

The multiple times copying were from frustration and looking at the code too long I think. I was out of ideas and kept trying new things in hopes of making it work.

I took your advice and added curly braces to that while loop and took out unneed stuff:

Code:
         while ((ep = readdir (dp)) != NULL) {
          strncat( pro, ep->d_name, 60);
          printf("%s\n", pro);
        }

        (void) closedir (dp);

Now I have this problem:
Code:
$ /proc/21480/fd/.
/proc/21480/fd/...
/proc/21480/fd/...0
/proc/21480/fd/...01
/proc/21480/fd/...012
/proc/21480/fd/...0123
/proc/21480/fd/...01234
/proc/21480/fd/...012345
/proc/21480/fd/...0123456
/proc/21480/fd/...01234567
/proc/21480/fd/...012345678
/proc/21480/fd/...0123456789
/proc/21480/fd/...012345678910
/proc/21480/fd/...01234567891011
/proc/21480/fd/...0123456789101112
/proc/21480/fd/...012345678910111213
/proc/21480/fd/...01234567891011121314
/proc/21480/fd/...0123456789101112131415
/proc/21480/fd/...012345678910111213141516

The reason I don't just use:
Code:
printf("%s%s\n", pro, ep->d_name);

Is because I need to eventually loop through each directory name to and call each one with another function that is already working.

I shall work on closing fopen, replacing strtok() with something more stable and your other suggestions. Thank you for the thorough response.
 

10 More Discussions You Might Find Interesting

1. Programming

save a struct

hi all , can i save a structure in c in a file? how ? help me , thx. :) (2 Replies)
Discussion started by: kall_ANSI
2 Replies

2. Programming

struct tm problem

I receive an integer as argument for a function. within function definition i want it to be of type struct tm. eg.. main() { int a; ...... } function(...,..,a,..) int a; { struct tm tm; if(!a) ^ time(&a); ^ ... (4 Replies)
Discussion started by: bankpro
4 Replies

3. Shell Programming and Scripting

How to replace any char with newline char.

Hi, How to replace any character in a file with a newline character using sed .. Ex: To replace ',' with newline Input: abcd,efgh,ijkl,mnop Output: abcd efgh ijkl mnop Thnx in advance. Regards, Sasidhar (5 Replies)
Discussion started by: mightysam
5 Replies

4. Programming

Adding a single char to a char pointer.

Hello, I'm trying to write a method which will return the extension of a file given the file's name, e.g. test.txt should return txt. I'm using C so am limited to char pointers and arrays. Here is the code as I have it: char* getext(char *file) { char *extension; int i, j;... (5 Replies)
Discussion started by: pallak7
5 Replies

5. 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

6. UNIX for Dummies Questions & Answers

How to access a struct within a struct?

Can someone tell me how to do this? Just a thought that entered my mind when learning about structs. First thought was: struct one { struct two; } struct two { three; } one->two->three would this be how you would access "three"? (1 Reply)
Discussion started by: unbelievable21
1 Replies

7. Programming

help with struct command in C

in C i am using this code to get the c time or a time or m time struct dirent *dir; struct stat my; stat(what, &my); thetime = my.st_ctime; How can i check if i have permission to check the c time of the file? (1 Reply)
Discussion started by: omega666
1 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

Storing C++-struct in file - problem when adding new item in struct

Hi, I have received an application that stores some properties in a file. The existing struct looks like this: struct TData { UINT uSizeIncludingStrings; // copy of Telnet data struct UINT uSize; // basic properties: TCHAR szHost; //defined in Sshconfig UINT iPortNr; TCHAR... (2 Replies)
Discussion started by: Powerponken
2 Replies

10. Programming

Invalid conversion from char* to char

Pointers are seeming to get the best of me and I get that error in my program. Here is the code #include <stdio.h> #include <stdlib.h> #include <string.h> #define REPORTHEADING1 " Employee Pay Hours Gross Tax Net\n" #define REPORTHEADING2 " Name ... (1 Reply)
Discussion started by: Plum
1 Replies

LEARN ABOUT ULTRIX

ppmtosixel

ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.	The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
	      pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order	of  magni-
	      tude larger than a compressed file and prints much slower.

       -margin
	      If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
	      fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater	than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

								   26 April 1991						     ppmtosixel(1)
All times are GMT -4. The time now is 09:05 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy