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    Command:

    argz_next

    
           argz_replace, argz_stringify - functions to handle an argz list
    
    
    

    SYNOPSIS

           #include <argz.h>
    
           error_t argz_add(char **argz, size_t *argz_len, const char *str);
    
           error_t argz_add_sep(char **argz, size_t *argz_len,
                                const char *str, int delim);
    
           error_t argz_append(char **argz, size_t *argz_len,
                                const char *buf, size_t buf_len);
    
           size_t argz_count(const char *argz, size_t argz_len);
    
           error_t argz_create(char * const argv[], char **argz,
                                size_t *argz_len);
    
           error_t argz_create_sep(const char *str, int sep, char **argz,
                                size_t *argz_len);
    
           error_t argz_delete(char **argz, size_t *argz_len, char *entry);
    
           void argz_extract(char *argz, size_t argz_len, char  **argv);
    
           error_t argz_insert(char **argz, size_t *argz_len, char *before,
                                const char *entry);
    
           char *argz_next(char *argz, size_t argz_len, const char *entry);
    
           error_t argz_replace(char **argz, size_t *argz_len, const char *str,
                                const char *with, unsigned int *replace_count);
    
           void argz_stringify(char *argz, size_t len, int sep);
    
    
    

    DESCRIPTION

           These functions are glibc-specific.
    
           An  argz  vector  is  a  pointer  to a character buffer together with a
           length.  The intended interpretation of  the  character  buffer  is  an
           array of strings, where the strings are separated by null bytes ('\0').
           If the length is nonzero, the last byte of the buffer must  be  a  null
           byte.
    
           These functions are for handling argz vectors.  The pair (NULL,0) is an
           argz vector, and, conversely, argz vectors of length 0 must  have  null
           pointer.   Allocation of nonempty argz vectors is done using malloc(3),
           so that free(3) can be used to dispose of them again.
    
           argz_add() adds the string str at the  end  of  the  array  *argz,  and
           updates *argz and *argz_len.
    
           argz_create_sep()  converts the null-terminated string str into an argz
           vector (*argz, *argz_len) by breaking it up at every occurrence of  the
           separator sep.
    
           argz_delete()  removes  the substring pointed to by entry from the argz
           vector (*argz, *argz_len) and updates *argz and *argz_len.
    
           argz_extract() is the opposite of argz_create().   It  takes  the  argz
           vector  (argz, argz_len)  and  fills  the  array  starting at argv with
           pointers to the substrings, and a final NULL, making a UNIX-style  argv
           vector.  The array argv must have room for argz_count(argz, argz_len) +
           1 pointers.
    
           argz_insert() is the opposite of argz_delete().  It inserts  the  argu-
           ment  entry  at position before into the argz vector (*argz, *argz_len)
           and updates *argz and *argz_len.  If before is NULL,  then  entry  will
           inserted at the end.
    
           argz_next()  is a function to step trough the argz vector.  If entry is
           NULL, the first entry is returned.  Otherwise, the entry  following  is
           returned.  It returns NULL if there is no following entry.
    
           argz_replace()  replaces each occurrence of str with with, reallocating
           argz as necessary.  If replace_count is non-NULL,  *replace_count  will
           be incremented by the number of replacements.
    
           argz_stringify()  is  the opposite of argz_create_sep().  It transforms
           the argz vector into a normal string by replacing all null bytes ('\0')
           except the last by sep.
    
    
    

    RETURN VALUE

           All  argz  functions  that  do  memory allocation have a return type of
           error_t, and return 0 for success, and ENOMEM if  an  allocation  error
           occurs.
    
    
    

    CONFORMING TO

           These functions are a GNU extension.  Handle with care.
    
    
    

    BUGS

           Argz  vectors  without a terminating null byte may lead to Segmentation
           Faults.
    
    
    

    SEE ALSO

           envz_add(3)
    
                                      2007-05-18                       ARGZ_ADD(3)
    
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