Strip a Character from the End of a String

Overwrite trailing CR, LF, and a chosen character with NULs so the string no longer ends on those bytes.

Language: C

Added on: 21^st August 2026

Submitted by: Lupraxus

#include <string.h>

char *stripend(char *str, char c)
{
    char *ptr;

    if (str == NULL || *str == '\0') {
        return str;
    }
    ptr = strchr(str, '\0');
    ptr--;
    while (ptr >= str && (*ptr == '\n' || *ptr == '\r' || *ptr == c)) {
        *ptr-- = '\0';
    }
    return str;
}

Caveats

Mutates the buffer in place. Empty and NULL strings are returned unchanged. Needs string.h.