10-28-2010
Appending from a file to a script and vice versa
Hi,
I am new to Unix and discovered this example problem online that I believe will help my learning:
Run the command's below
env >> xx
env >> xx
env >> xx
env >> xx
env >> xx
You will now have a file called XX with the env redirected into it 5 times
Create a script named 'username' that takes 1 argument being a file, in this instance we will use the newly created file above xx. Read the input file and look for occurrences of the current user who is executing the script. On finding an occurrence of the username take that line and append it to a file and display a line number and a bracket against the saved line.
Any ideas of how best to tackle this problem?
All replies will be much appreciated
Jimmy Champion
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LEARN ABOUT FREEBSD
hx509_env_find
hx509 enviroment functions(3) Heimdalx509library hx509 enviroment functions(3)
NAME
hx509 enviroment functions -
Functions
int hx509_env_add (hx509_context context, hx509_env *env, const char *key, const char *value)
int hx509_env_add_binding (hx509_context context, hx509_env *env, const char *key, hx509_env list)
const char * hx509_env_lfind (hx509_context context, hx509_env env, const char *key, size_t len)
const char * hx509_env_find (hx509_context context, hx509_env env, const char *key)
hx509_env hx509_env_find_binding (hx509_context context, hx509_env env, const char *key)
void hx509_env_free (hx509_env *env)
Detailed Description
Function Documentation
int hx509_env_add (hx509_context context, hx509_env * env, const char * key, const char * value)
Add a new key/value pair to the hx509_env.
Parameters:
context A hx509 context.
env enviroment to add the enviroment variable too.
key key to add
value value to add
Returns:
An hx509 error code, see hx509_get_error_string().
int hx509_env_add_binding (hx509_context context, hx509_env * env, const char * key, hx509_env list)
Add a new key/binding pair to the hx509_env.
Parameters:
context A hx509 context.
env enviroment to add the enviroment variable too.
key key to add
list binding list to add
Returns:
An hx509 error code, see hx509_get_error_string().
const char* hx509_env_find (hx509_context context, hx509_env env, const char * key)
Search the hx509_env for a key.
Parameters:
context A hx509 context.
env enviroment to add the enviroment variable too.
key key to search for.
Returns:
the value if the key is found, NULL otherwise.
hx509_env hx509_env_find_binding (hx509_context context, hx509_env env, const char * key)
Search the hx509_env for a binding.
Parameters:
context A hx509 context.
env enviroment to add the enviroment variable too.
key key to search for.
Returns:
the binding if the key is found, NULL if not found.
void hx509_env_free (hx509_env * env)
Free an hx509_env enviroment context.
Parameters:
env the enviroment to free.
const char* hx509_env_lfind (hx509_context context, hx509_env env, const char * key, size_t len)
Search the hx509_env for a length based key.
Parameters:
context A hx509 context.
env enviroment to add the enviroment variable too.
key key to search for.
len length of key.
Returns:
the value if the key is found, NULL otherwise.
Version 1.5.2 11 Jan 2012 hx509 enviroment functions(3)