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    The following form allows you to view linux man pages.

    Command:

    envz_get

    
    
    
    

    SYNOPSIS

           #include <envz.h>
    
           error_t envz_add(char **envz, size_t *envz_len,
                            const char *name, const char *value);
    
           char *envz_entry(const char *envz, size_t *envz_len, const char *name);
    
           char *envz_get(const char *envz, size_t *envz_len, const char *name);
    
           error_t envz_merge(char **envz, size_t *envz_len,
                              const char *envz2, size_t envz2_len, int override);
    
           void envz_remove(char **envz, size_t *envz_len, const char *name);
    
           void envz_strip(char **envz, size_t *envz_len);
    
    
    

    DESCRIPTION

           These functions are glibc-specific.
    
           An argz vector is a pointer to  a  character  buffer  together  with  a
           length,  see  argz_add(3).   An  envz  vector is a special argz vector,
           namely one where the strings have the  form  "name=value".   Everything
           after the first '=' is considered to be the value.  If there is no '=',
           the value is taken to be NULL.  (While the value in case of a  trailing
           '=' is the empty string "".)
    
           These functions are for handling envz vectors.
    
           envz_add()  adds the string "name=value" (in case value is non-NULL) or
           "name" (in case value is NULL) to the  envz  vector  (*envz, *envz_len)
           and  updates  *envz  and  *envz_len.   If  an  entry with the same name
           existed, it is removed.
    
           envz_entry() looks for name in the  envz  vector  (envz, envz_len)  and
           returns the entry if found, or NULL if not.
    
           envz_get()  looks  for  name  in  the  envz vector (envz, envz_len) and
           returns the value if found, or NULL if not.  (Note that the  value  can
           also be NULL, namely when there is an entry for name without '=' sign.)
    
           envz_merge() adds each entry in envz2 to *envz, as if with  envz_add().
           If override is true, then values in envz2 will supersede those with the
           same name in *envz, otherwise not.
    
           envz_remove() removes the entry for  name  from  (*envz, *envz_len)  if
           there was one.
    
           envz_strip() removes all entries with value NULL.
    
    
    

    RETURN VALUE

           {
               int i, e_len = 0;
               char *str;
    
               for (i = 0; envp[i] != NULL; i++)
                   e_len += strlen(envp[i]) + 1;
    
               str = envz_entry(*envp, e_len, "HOME");
               printf("%s\n", str);
               str = envz_get(*envp, e_len, "HOME");
               printf("%s\n", str);
               exit(EXIT_SUCCESS);
           }
    
    
    

    SEE ALSO

           argz_add(3)
    
                                      2007-05-18                       ENVZ_ADD(3)
    
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