10-30-2010
changing number in bash (number is in form of string)
I have a txt file as database. when i run my program what it does is it ask me for 3 name and stored in the file as
name1:name2:name3:1
when u enter 3 name it add those in file as above format and add 1 at the end. I what i want is if i enter same names again it changes that 1 to 2 and so on..but if i enter different names than it add those in a fiile with 1 at the end.. any idea will be apreciated
message for mod: I ask this kind of question in one of my other thread but that thread was about something else. So if this is not allowed to ask again even though the topic is different. please delete the post..Thanks
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LEARN ABOUT NETBSD
symlink
SYMLINK(2) BSD System Calls Manual SYMLINK(2)
NAME
symlink -- make symbolic link to a file
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
int
symlink(const char *name1, const char *name2);
DESCRIPTION
A symbolic link name2 is created to name1 (name2 is the name of the file created, name1 is the string used in creating the symbolic link).
Either name may be an arbitrary path name; the files need neither to be on the same file system nor to exist.
RETURN VALUES
Upon successful completion, a zero value is returned. If an error occurs, the error code is stored in errno and a -1 value is returned.
ERRORS
The symbolic link succeeds unless:
[ENOTDIR] A component of the name2 prefix is not a directory.
[ENAMETOOLONG] A component of a pathname exceeded {NAME_MAX} characters, or an entire path name exceeded {PATH_MAX} characters.
[ENOENT] A component of the name2 path does not exist.
[EACCES] A component of the name2 path prefix denies search permission.
[ELOOP] Too many symbolic links were encountered in translating the pathname.
[EEXIST] name2 already exists.
[EIO] An I/O error occurred while making the directory entry for name2, or allocating the inode for name2, or writing out the
link contents of name2.
[EROFS] The file name2 would reside on a read-only file system.
[ENOSPC] The directory in which the entry for the new symbolic link is being placed cannot be extended because there is no space
left on the file system containing the directory.
[ENOSPC] The new symbolic link cannot be created because there there is no space left on the file system that will contain the sym-
bolic link.
[ENOSPC] There are no free inodes on the file system on which the symbolic link is being created.
[EDQUOT] The directory in which the entry for the new symbolic link is being placed cannot be extended because the user's quota of
disk blocks on the file system containing the directory has been exhausted.
[EDQUOT] The new symbolic link cannot be created because the user's quota of disk blocks on the file system that will contain the
symbolic link has been exhausted.
[EDQUOT] The user's quota of inodes on the file system on which the symbolic link is being created has been exhausted.
[EIO] An I/O error occurred while making the directory entry or allocating the inode.
[EFAULT] name1 or name2 points outside the process's allocated address space.
SEE ALSO
ln(1), link(2), readlink(2), unlink(2), symlink(7)
HISTORY
The symlink() function call appeared in 4.2BSD.
BSD
June 4, 1993 BSD