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Add warning when trying to change read-only variable

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darcs-hash:20060410153626-ac50b-700ff7687647b8aab47ba79d759d1739cbe60425.gz
This commit is contained in:
axel 2006-04-11 01:36:26 +10:00
parent f812b9b26c
commit bd9c843fd1
3 changed files with 33 additions and 9 deletions
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18
builtin_set.c
View file

@ -26,6 +26,18 @@ Functions used for implementing the set builtin.
#include "parser.h"
#include "translate.h"
static void my_env_set( wchar_t *key, wchar_t *val, int scope )
{
switch( env_set( key, val, scope | ENV_USER ) )
{
case ENV_PERM:
{
sb_printf( sb_err, _(L"%ls: Tried to change the read-only variable '%ls'\n"), L"set", key );
break;
}
}
}
/**
Extract the name from a destination argument of the form name[index1 index2...]
*/
@ -512,7 +524,7 @@ int builtin_set( wchar_t **argv )
!erase &&
!list )
{
env_set( name, 0, scope );
my_env_set( name, 0, scope );
finished = 1;
}
}
@ -572,7 +584,7 @@ int builtin_set( wchar_t **argv )
else
{
fill_buffer_from_list(&result_sb, &val_l);
env_set(name, (wchar_t *) result_sb.buff, scope);
my_env_set(name, (wchar_t *) result_sb.buff, scope);
}
}
else
@ -585,7 +597,7 @@ int builtin_set( wchar_t **argv )
fill_buffer_from_list( &result_sb,
&val_l );
env_set(name,
my_env_set(name,
(wchar_t *) result_sb.buff,
scope);
}

7
env.c
View file

@ -608,7 +608,7 @@ static env_node_t *env_get_node( const wchar_t *key )
return 0;
}
void env_set( const wchar_t *key,
int env_set( const wchar_t *key,
const wchar_t *val,
int var_mode )
{
@ -626,7 +626,7 @@ void env_set( const wchar_t *key,
if( (var_mode & ENV_USER ) &&
hash_get( &env_read_only, key ) )
{
return;
return ENV_PERM;
}
if( wcscmp( key, L"umask" ) == 0)
@ -650,7 +650,7 @@ void env_set( const wchar_t *key,
/*
Do not actually create a umask variable, on env_get, it will be calculated dynamically
*/
return;
return 0;
}
/*
@ -810,6 +810,7 @@ void env_set( const wchar_t *key,
handle_locale();
}
return 0;
}

13
env.h
View file

@ -41,6 +41,11 @@
*/
#define ENV_UNIVERSAL 32
/**
Error code for trying to alter read-only variable
*/
#define ENV_PERM 1
/**
Initialize environment variable data
*/
@ -61,9 +66,15 @@ void env_destroy();
\param val The value
\param mode The type of the variable. Can be any combination of ENV_GLOBAL, ENV_LOCAL, ENV_EXPORT and ENV_USER. If mode is zero, the current variable space is searched and the current mode is used. If no current variable with the same name is found, ENV_LOCAL is assumed.
\returns 0 on suicess or an error code on failiure.
The current error codes are:
* ENV_PERM, can only be returned when setting as a user, e.g. ENV_USER is set. This means that the user tried to change a read-only variable.
*/
void env_set( const wchar_t *key,
int env_set( const wchar_t *key,
const wchar_t *val,
int mode );