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Fix overflow in basename(1)

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sin 2014-11-13 14:24:26 +00:00
parent c59894bd5c
commit a7ad11ed5e
1 changed files with 5 additions and 8 deletions
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13
basename.c
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@ -17,8 +17,7 @@ usage(void)
int int
main(int argc, char *argv[]) main(int argc, char *argv[])
{ {
char *s; char *s, *p;
size_t n;
ARGBEGIN { ARGBEGIN {
default: default:
@ -29,13 +28,11 @@ main(int argc, char *argv[])
usage(); usage();
s = basename(argv[0]); s = basename(argv[0]);
if(argc == 2 && argv[1]) { if(argc == 2) {
n = strlen(s) - strlen(argv[1]); p = strstr(s, argv[1]);
if(!strcmp(&s[n], argv[1])) if (p && p[strlen(p)] == '\0')
s[n] = '\0'; *p = '\0';
} }
puts(s); puts(s);
return 0; return 0;
} }