jehanne/sys/src/cmd/basename.c

51 lines
1017 B
C

/*
* This file is part of the UCB release of Plan 9. It is subject to the license
* terms in the LICENSE file found in the top-level directory of this
* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
* part of the UCB release of Plan 9, including this file, may be copied,
* modified, propagated, or distributed except according to the terms contained
* in the LICENSE file.
*/
#include <u.h>
#include <lib9.h>
void
main(int argc, char *argv[])
{
char *pr;
int n, dflag;
dflag = 0;
if(argc>1 && strcmp(argv[1], "-d") == 0){
--argc;
++argv;
dflag = 1;
}
if(argc < 2 || argc > 3){
fprint(2, "usage: basename [-d] string [suffix]\n");
exits("usage");
}
pr = utfrrune(argv[1], '/');
if(dflag){
if(pr){
*pr = 0;
print("%s\n", argv[1]);
exits(0);
}
print(".\n");
exits(0);
}
if(pr)
pr++;
else
pr = argv[1];
if(argc==3){
n = strlen(pr)-strlen(argv[2]);
if(n >= 0 && !strcmp(pr+n, argv[2]))
pr[n] = 0;
}
print("%s\n", pr);
exits(0);
}