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libc: make ttyname(3) use devname(3)

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There was an off-by-one in the old MINIX-specific implementation,
which caused ttyname(3) to fail at random. Since we now have a working
devname(3), there is no need for MINIX-specific code anymore here.

Change-Id: I27d8b6c4f66c84f383156ed494b740d071af02a7
This commit is contained in:
David van Moolenbroek 2013-11-24 21:50:44 +01:00 committed by Lionel Sambuc
parent fcce231cb7
commit 69cba46141
1 changed files with 0 additions and 57 deletions
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57
lib/libc/gen/ttyname.c
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@ -56,56 +56,6 @@ __weak_alias(ttyname,_ttyname)
__weak_alias(ttyname_r,_ttyname_r)
#endif
#if defined(__minix)
/* LSC: We do not have devname functionality on Minix, so re-import for now
* old, manual way of doing it.*/
#include <dirent.h>
static int
oldttyname(const struct stat *sb, char *buf, size_t len)
{
struct dirent *dirp;
DIR *dp;
struct stat dsb;
size_t dlen;
_DIAGASSERT(sb != NULL);
if ((dp = opendir(_PATH_DEV)) == NULL)
return -1;
while ((dirp = readdir(dp)) != NULL) {
#define DEVSZ (sizeof(_PATH_DEV) - 1)
if (dirp->d_fileno != sb->st_ino)
continue;
dlen = strlen(dirp->d_name);
if (len - DEVSZ <= dlen) {
/*
* XXX: we return an error if *any* entry does not
* fit
*/
errno = ERANGE;
(void)closedir(dp);
return -1;
}
(void)memcpy(buf + DEVSZ, dirp->d_name, dlen);
if (stat(buf, &dsb) || sb->st_dev != dsb.st_dev ||
sb->st_ino != dsb.st_ino)
continue;
(void)closedir(dp);
return 0;
#undef DEVSZ
}
(void)closedir(dp);
/*
* XXX: Documented by TOG to return EBADF or ENOTTY only; neither are
* applicable here.
*/
errno = ENOENT;
return -1;
}
#endif /* defined(__minix) */
int
ttyname_r(int fd, char *buf, size_t len)
{
@ -136,16 +86,9 @@ ttyname_r(int fd, char *buf, size_t len)
if (strlcpy(buf, _PATH_DEV, len) >= len)
return ERANGE;
#if defined(__minix)
if (oldttyname(&sb, buf, len) == -1)
return errno;
return 0;
#else
buf += strlen(_PATH_DEV);
len -= strlen(_PATH_DEV);
return devname_r(sb.st_rdev, sb.st_mode & S_IFMT, buf, len);
#endif /* defined(__minix) */
}
char *