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-rw-r--r--posix/unistd.h15
1 files changed, 7 insertions, 8 deletions
diff --git a/posix/unistd.h b/posix/unistd.h
index a9a89a73d3..5cf41df723 100644
--- a/posix/unistd.h
+++ b/posix/unistd.h
@@ -55,7 +55,7 @@ __BEGIN_DECLS
creation of locales with the localedef utility. */
#define _POSIX2_LOCALEDEF 1
-/* Library is conformant to X/Open version 4. */
+/* Library conforms to X/Open version 4. */
#define _XOPEN_VERSION 4
/* Commands and utilities from XPG4 are available. */
@@ -213,7 +213,7 @@ extern ssize_t write __P ((int __fd, __const __ptr_t __buf, size_t __n));
/* Create a one-way communication channel (pipe).
- If successul, two file descriptors are stored in PIPEDES;
+ If successful, two file descriptors are stored in PIPEDES;
bytes written on PIPEDES[1] can be read from PIPEDES[0].
Returns 0 if successful, -1 if not. */
extern int __pipe __P ((int __pipedes[2]));
@@ -246,8 +246,8 @@ extern unsigned int ualarm __P ((unsigned int __value,
unsigned int __interval));
/* Sleep USECONDS microseconds, or until a signal arrives that is not blocked
- or ignored. Return value is not necessarily useful. */
-extern unsigned int usleep __P ((unsigned int __useconds));
+ or ignored. */
+extern void usleep __P ((unsigned int __useconds));
#endif
@@ -333,7 +333,6 @@ extern int dup2 __P ((int __fd, int __fd2));
/* NULL-terminated array of "NAME=VALUE" environment variables. */
extern char **__environ;
-extern char **environ;
/* Replace the current process, executing PATH with arguments ARGV and
@@ -605,7 +604,7 @@ extern int tcsetpgrp __P ((int __fd, __pid_t __pgrp_id));
extern char *getlogin __P ((void));
#ifdef __USE_REENTRANT
/* Return at most NAME_LEN characters of the login name of the user in NAME.
- If it cannot be determined or some other error occured, return the error
+ If it cannot be determined or some other error occurred, return the error
code. Otherwise return 0. */
extern int getlogin_r __P ((char *__name, size_t __name_len));
#endif
@@ -830,11 +829,11 @@ extern int __libc_enable_secure;
#endif
-#ifdef __USE_POSIX
+#ifdef __USE_POSIX199309
/* Synchronize at least the data part of a file with the underlying
media. */
extern int fdatasync __P ((int __fildes));
-#endif /* Use POSIX */
+#endif /* Use POSIX199309 */
/* XPG4.2 specifies that prototypes for the encryption functions must