ref: d0e510b29af9a1d12a507f03f352b6d39adc0ace
dir: /sys/src/ape/cmd/basename.c/
#include <stdlib.h> #include <string.h> #include <stdio.h> void main(int argc, char **argv) { char *f, *b, *s; int n; if(argc < 2 || argc > 3){ fprintf(stderr, "Usage: basename string [suffix]\n"); exit(1); } s = argv[1]; b = s + strlen(s) - 1; while(b > s && *b == '/') b--; *++b = 0; if(b == s+1 && s[0] == '/') { printf("/"); exit(0); } /* now b is after last char of string, trailing slashes removed */ for(f = b; f >= s; f--) if(*f == '/'){ f++; break; } if(f < s) f = s; /* now f is first char after last remaining slash, or first char */ if(argc == 3){ n = strlen(argv[2]); if(n < b-f && strncmp(b-n, argv[2], n) == 0){ b -= n; *b = 0; } } printf("%s\n", f); exit(0); }