hi..
i want to make an alias in unix, for using it to change of directory
by example:
if i am in /dtmp/inp/aux and i want to go to /sybase/bd, i want to make an alias named "bd", to go directally to /sybase/bd (alias bd="cd /sybase/bd")
i create it, but when i turn off the conection... (2 Replies)
I just started shell coding and I'm a bit confused on how 'mv' works can someone explain to me how it works and if i did this correctly. Thanks.
echo "Enter Name of the first file:"
read file1
#echo $file1
if ; then
echo "Sorry, file does not exist."
exit 1
... (16 Replies)
Hi,
I have a software package consisting of a group of BASH shell scripts. There is a master script which calls a series of subscripts. To run the software users must open the master script, modify and save it, and then run it. To open the script you can either double-click on it, or you can... (2 Replies)
Hi,
I have created alias in UNIX environment (ie in .cshrc file). But when i use the alias in the UNIX script, getting an error message as that is not found. But when i use that alias, outside the script it is working fine.
Let me know if you need more details
For example:
alias cderror... (6 Replies)
I need to login to one server and then switch the user and set a number alias. But i cant modify the .profile file.
I have one script avi1.sh
$ more avi.sh
sudo su - bil
sh avi1.sh
and in home directory of bil i have avi1.sh that says
$ more avi1.sh
alias l='ls -ltr'
alias b='cd... (7 Replies)
Hi Gurus:
I am trying to understand the following line of code.I did enough of googling to understand but no luck.Please help me understand the follow chunk of code:
X=$0
MOD=${X%/*}/env.ksh
X is the current script from which I am trying to execute.
Say if X=test.ksh
$MOD is echoing :... (3 Replies)
If one:
$ find -name 'some expression' -type f > newfile
and then subsequently wants to create an alias file from each pathname the find command retrieved and the > placed within 'newfile', how would one do this? Ideally, the newly created alias files would all be in one directory.
I am... (3 Replies)
Hi,
I found this in a script and I would like to know how this works
Code is here:
# var1=PART1_PART2
# var2=${var1##*_}
# echo $var2
PART2
I'm wondering how ##* makes the Shell to understand to pick up the last value from the given. (2 Replies)
Discussion started by: sathyaonnuix
2 Replies
LEARN ABOUT DEBIAN
hash_create
HASH(3pub) C Programmer's Manual HASH(3pub)NAME
hash_create, hash_destroy, hash_install, hash_lookup, hash_uninstall, hash_iter - generic hash tables
SYNOPSIS
#include <publib.h>
Hashtab *hash_create(unsigned long (*fun)(void *),
int (*cmp)(const void *, const void *));
void hash_destroy(Hashtab *ht);
void *hash_install(Hashtab *ht, void *data, size_t size);
void *hash_lookup(Hashtab *ht, void *data);
int hash_uninstall(Hashtab *ht, void *data);
int hash_iter(Hashtab *ht, int (*doit)(void *, void *), void *param);
DESCRIPTION
These functions implement generic hash tables. The table is created by hash_create and destroyed by hash_destroy. The fun argument is a
pointer to the hashing function, which must convert a datum to an unsigned long, which is then converted to an index into the hashing ta-
ble. cmp is a qsort(3)-like comparison functions, used to compare to (wannabe) hash table elements.
hash_install installs a new datum into the table. A pointer to the data and the size of the data are given as the arguments. If the size
is 0, only the pointer value is copied to the table. Otherwise a copy of the data is made into dynamically allocated memory.
hash_lookup attempts to find a datum in the hash table. A pointer to another datum is given as the argument. The comparison function
should compare equal (return 0) the desired datum and this datum (but the argument needn't be a fully initialized datum, although that is
up to the writer of the comparison function). There cannot be two elements in the hash table that are equal (the comparison function
returns 0 for them). It is up to the user to handle collisions.
hash_uninstall removes an element from a table. The argument is a pointer to a datum that identifies the element.
hash_iter goes through every element in the hash table and calls the doit function for each. The first argument it provides to doit is the
element in question, the second is whatever was given to hash_iter as param. If doit returns -1 or 0 for any element in the hash table,
hash_iter immediately returns without going through the remaining elements in the hash table. Any other return value from doit is ignored.
RETURNS
hash_create returns a pointer to the new hash table, or NULL if it fails.
hash_install returns a pointer to an element in the table (either the installed one, or one that was already installed, if one tries to
install the same datum twice).
hash_uninstall returns 0 if it found the element in the array, or -1 if it didn't.
hash_lookup return a pointer to the element it finds, or NULL if it doesn't find anything beautiful.
hash_iter returns -1, 0, or 1. If hash_iter receives a return value of -1 or 0 for some element from doit, hash_iter immediately returns
-1 or 0, respectively. In all other cases hash_iter returns 1.
SEE ALSO publib(3), qsort(3), bsearch(3)AUTHOR
Lars Wirzenius (lars.wirzenius@helsinki.fi)
Publib C Programmer's Manual HASH(3pub)