hi all,
let say i have a pointer exit, and this exit will store some value. how can i store the value that the pointer points to into an array and then print them out from the array.
thanks in advance (2 Replies)
I'm pretty new at this UNIX stuff, and this may be a simple question but I'm kind of stuck :confused:
Let's say I have a large directory structure of .essay files,
where I saved all of the essays that I did over the last few years. Not all of the .essay files are in the same directory (all... (1 Reply)
Hi
i have the following structure
struct S
{
char Mod_num;
char val;
char chr_nm_cd;
}
I am reading a 2GB file and inserting into the structure and writing into a vector.
I feel like only vector will be a right option. I tried with multimap but it is memory intensive and hence i... (1 Reply)
Hi All,
I am using the array of pointers and storing the address of string.This is a global list.
So i am using extern to give the reference of this list to another file and using reading the data from this string.
But list is being corrupted and string is missing some characters in... (2 Replies)
I was given to create a backup of all files in a given directory(command line argument) into say /home/vishal/back and the back up files must be accordingly to the extension of the file i.e pdf files are saved in back/pdf doc files back/doc etc . I gave a recursive function to traverse through the... (1 Reply)
I am writing a script which will read a word and say how many vowels and consonants does the word contain. but i dont know how to traverse a string in shell scripting. if it was in C i'd have done something like this:
cout<<"plz enter the word"<<endl;
cin>>word;
int consonants, vowels;... (4 Replies)
Hello, I read from a book exercise for a challenge. How to print out each letter of char array a by two different pointers pa and ppa in the example?
I have tried my code for letter "r" by testing without full understanding as only the first one worked.
#include<stdio.h>
int main()
{
char... (17 Replies)
Hello,
I want to loop thru a vector composed of many entries as structure, which contains sequenceID and sequence. At looping, delete any structure if the sequence is a perfect-match substring of another sequence of any other structure, so that the resulted vector contains only unique sequences.... (1 Reply)
I am attempting to create an array of function pointers. The examples I follow to do this are from:
support.microsoft.com/en-us/help/30580/how-to-declare-an-array-of-pointers-to-functions-in-visual-c
... (3 Replies)
Discussion started by: spflanze
3 Replies
LEARN ABOUT OSF1
strlcpy
STRLCPY(3) BSD Library Functions Manual STRLCPY(3)NAME
strlcpy, strlcat -- size-bounded string copying and concatenation
LIBRARY
Utility functions from BSD systems (libbsd, -lbsd)
SYNOPSIS
#include <bsd/string.h>
size_t
strlcpy(char *dst, const char *src, size_t size);
size_t
strlcat(char *dst, const char *src, size_t size);
DESCRIPTION
The strlcpy() and strlcat() functions copy and concatenate strings respectively. They are designed to be safer, more consistent, and less
error prone replacements for strncpy(3) and strncat(3). Unlike those functions, strlcpy() and strlcat() take the full size of the buffer
(not just the length) and guarantee to NUL-terminate the result (as long as size is larger than 0 or, in the case of strlcat(), as long as
there is at least one byte free in dst). Note that a byte for the NUL should be included in size. Also note that strlcpy() and strlcat()
only operate on true ``C'' strings. This means that for strlcpy() src must be NUL-terminated and for strlcat() both src and dst must be NUL-
terminated.
The strlcpy() function copies up to size - 1 characters from the NUL-terminated string src to dst, NUL-terminating the result.
The strlcat() function appends the NUL-terminated string src to the end of dst. It will append at most size - strlen(dst) - 1 bytes, NUL-
terminating the result.
RETURN VALUES
The strlcpy() and strlcat() functions return the total length of the string they tried to create. For strlcpy() that means the length of
src. For strlcat() that means the initial length of dst plus the length of src. While this may seem somewhat confusing, it was done to make
truncation detection simple.
Note, however, that if strlcat() traverses size characters without finding a NUL, the length of the string is considered to be size and the
destination string will not be NUL-terminated (since there was no space for the NUL). This keeps strlcat() from running off the end of a
string. In practice this should not happen (as it means that either size is incorrect or that dst is not a proper ``C'' string). The check
exists to prevent potential security problems in incorrect code.
EXAMPLES
The following code fragment illustrates the simple case:
char *s, *p, buf[BUFSIZ];
...
(void)strlcpy(buf, s, sizeof(buf));
(void)strlcat(buf, p, sizeof(buf));
To detect truncation, perhaps while building a pathname, something like the following might be used:
char *dir, *file, pname[MAXPATHLEN];
...
if (strlcpy(pname, dir, sizeof(pname)) >= sizeof(pname))
goto toolong;
if (strlcat(pname, file, sizeof(pname)) >= sizeof(pname))
goto toolong;
Since it is known how many characters were copied the first time, things can be sped up a bit by using a copy instead of an append:
char *dir, *file, pname[MAXPATHLEN];
size_t n;
...
n = strlcpy(pname, dir, sizeof(pname));
if (n >= sizeof(pname))
goto toolong;
if (strlcpy(pname + n, file, sizeof(pname) - n) >= sizeof(pname) - n)
goto toolong;
However, one may question the validity of such optimizations, as they defeat the whole purpose of strlcpy() and strlcat(). As a matter of
fact, the first version of this manual page got it wrong.
SEE ALSO snprintf(3), strncat(3), strncpy(3)HISTORY
The strlcpy() and strlcat() functions first appeared in OpenBSD 2.4, and made their appearance in FreeBSD 3.3.
BSD May 31, 2007 BSD