diff options
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/unix/sysv/linux/getcwd.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/sysdeps/unix/sysv/linux/getcwd.c b/sysdeps/unix/sysv/linux/getcwd.c index 6c68955fdb..417841664e 100644 --- a/sysdeps/unix/sysv/linux/getcwd.c +++ b/sysdeps/unix/sysv/linux/getcwd.c @@ -103,7 +103,7 @@ __getcwd (char *buf, size_t size) retval = INLINE_SYSCALL (getcwd, 2, CHECK_STRING (path), alloc_size); if (retval >= 0) { - if (buf == NULL) + if (buf == NULL && size == 0) { buf = realloc (path, (size_t) retval); if (buf == NULL) @@ -115,8 +115,9 @@ __getcwd (char *buf, size_t size) # if __ASSUME_GETCWD_SYSCALL /* It should never happen that the `getcwd' syscall failed because - the buffer is too small if we allocated the buffer outself. */ - assert (errno != ERANGE || buf != NULL); + the buffer is too small if we allocated the buffer outselves + large enough. */ + assert (errno != ERANGE || buf != NULL || size != 0); if (buf == NULL) free (path); @@ -153,8 +154,9 @@ __getcwd (char *buf, size_t size) } path[n] = '\0'; - if (buf == NULL) + if (buf == NULL && size == 0) { + /* Ensure that the buffer is only as large as necessary. */ buf = realloc (path, (size_t) n + 1); if (buf == NULL) /* `relloc' failed but we still have the original string. */ |