hail% tput -Txterm kdch1 | sed "s/$(echo -e '\033')/|/"; echo
|[3~
hail% cat dump-kdch1.c
#include <stdio.h>
#include <curses.h>
#include <term.h>

#define assert(cond, msg) \
        if(!(cond)) { \
                fprintf(stderr, "Assertion failed: %s\n", (msg)); \
                return 1; \
        }

int main() {
        int status;
        char buffer[512], *area, *retstr;
        status = tgetent(NULL, "xterm");
        assert(status == 1, "tgetent");
        area = buffer;
        retstr = tgetstr("kdch1", &area);
        assert(retstr, "tgetstr");
        if(*retstr == '\033')
                *retstr = '|';
        if(*buffer == '\033')
                *buffer = '|';
        printf("size = %u\n", (unsigned)(area - buffer));
        printf("retstr = '%s'\n", retstr);
        printf("buffer = '%s'\n", buffer);
        return 0;
}
hail% ./dump-kdch1
size = 4
retstr = '|OB'
buffer = '|OB'
hail%