append/copy to end of string

Is there a way to copy or append something to the end of a string?
What I specificly want to do is to get the current directory with getwd() (or with pwd using fork(), whatever suits my project best) and then append/copy a filename to the path. I'm sure there's a simple way to do to this. Can anyone help? :)

strcat( )

strcat( )

** edit **
Rats! You beat me.

Wow, didn't take more than one minute to get a reply. Thanks. :)
A feel a bit stupid for not knowing about strcat(), though. :rolleyes:

Here's a good reference: http://cppreference.com/

Its got a list of all such string functions, and other Standard Library functions (for both C and C++).

Thank you, Zach, a very good list indeed. Bookmarked it.

Or http://www.cplusplus.com/ref

Bookmarked that one too, thanks. :)

Edit:
Another problem in my project has come up (related to the previous one, that's why I'm not creating a new thread). I got strcat() to work, and I'm using:

Code:

---

// added the / in the filename to make it work
strcat(&currentDir, fileName);

[...]
// the using the variable in an array
char *argv1[] = {"touch", "input_file.txt", NULL};
char *argv2[] = {"cat", setPath, ">>", &currentDir, NULL};

[...]
// using the arrays in the child process
execve("/usr/bin/touch", argv1, NULL);
execve("/bin/cat", argv2, NULL);

---

The problem is my file, 'input_file.txt' is empty. My guess is that the second array is failing, but how can I make the '>>' to work?

Quote:

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Originally posted by Salem
Shell redirections like >> are handled by the shell, not exec level functions.

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I know, but as i.e. char *argv[] = {"ping", "-c 5", ping_host, NULL}; is equal to 'ping -c 5 apple.com' (if ping_host is set to apple.com that is) it should work, at least in theory (at least in my theory :rolleyes: ). Or am I off track? Am I thinking wrong?

Quote:

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> strcat(&currentDir, fileName);
Your use of & is unusual - how did you declare currentDir?

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My code looks like this (and works):

Code:

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char *fileName = { "/input_file.txt" };
char currentDir;

getwd(&currentDir);
strcat(&currentDir, fileName);

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If this is bad code (or a bad idea to solve it), please let me know.

Quote:

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Originally posted by Salem
The shell assigns each word of a command line to a separate argv, so ping -c 5 apple.com would be
char *argv[] = {"ping", "-c", "5", ping_host, NULL};

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Thanks for pointing that out. My array did work as it should, though, but it really doesn't matter if it's still done the wrong way..

Quote:

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Yeah - you're overwriting memory you don't own

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Ouch, yes I am. (How could I not see that..) I applied your code to my project, thank you. What can overwriting memory like I did do to the system in the long run, btw?

Quote:

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Does getwd() return an error of any sort?

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Do you mean from my code, or the function's return values?

According to the man page for getwd() (and getcwd() - which apparently should be used instead, as getwd() is for FreeBSD compatibility only) a pointer to the pathname is returned upon successful completion. If it fails a NULL pointer is returned. The functions also has five error macros EACCES, EINVAL, ENOENT, ENOMEM and ERANGE.

*can't live without man pages* :)