ref: bd78cd2dd35c006763a03979bf6bbe4f3a25598b dir: /sys/src/libc/port/needsrcquote.c/
#include <u.h> #include <libc.h> int needsrcquote(int c) { if(c <= ' ') return 1; if(utfrune("`^#*[]=|\\?${}()'<>&;", c)) return 1; return 0; }