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reduce strlen() call.

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This commit is contained in:
Hajimu UMEMOTO 2005-05-20 15:39:20 +00:00
parent cfc967e66a
commit 77cf61aeb0
1 changed files with 6 additions and 4 deletions
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10
lib/libc/gen/ttyname.c
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@ -66,6 +66,7 @@ ttyname_r(int fd, char *buf, size_t len)
{
struct stat sb;
struct fiodgname_arg fgn;
size_t used;
*buf = '\0';
@ -80,12 +81,13 @@ ttyname_r(int fd, char *buf, size_t len)
return (ERANGE);
strcpy(buf, _PATH_DEV);
fgn.len = len - strlen(buf);
fgn.buf = buf + strlen(buf);
used = strlen(buf);
fgn.len = len - used;
fgn.buf = buf + used;
if (!_ioctl(fd, FIODGNAME, &fgn))
return (0);
devname_r(sb.st_rdev, S_IFCHR,
buf + strlen(buf), len - strlen(buf));
used = strlen(buf);
devname_r(sb.st_rdev, S_IFCHR, buf + used, len - used);
return (0);
}