c - Wordexp behavour with & -

does knows wordexp() behaviour strings, contained '|' or '&'.

i use wordexp(str, &res, wrde_undef), strings, contained '|' or '&' wordexp() returns wrde_badchar. want wordexp() doesn't report this.

e.g. want wordexp("a & b", &res, wrde_undef) returns wordexp_t 3 strings "a" "&" "b".

illegal characters (newline or |, &, ;, <, >, (, ), {, }) need escaped. done prefixing them \.

verbatim man wordexp:

the string argument

since expansion same expansion shell (see sh(1)) of parameters command, string s must not contain characters illegal in shell command parameters. in particular, there must not unescaped newline or |, &, ;, <, >, (, ), {, } characters outside command substitution or parameter substitution context.