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author | Ed Maste <emaste@FreeBSD.org> | 2023-10-13 20:25:53 +0000 |
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committer | Ed Maste <emaste@FreeBSD.org> | 2023-10-16 17:50:10 +0000 |
commit | 6eae573dc2298e3e0d97b0d829828a427254946c (patch) | |
tree | 88c336a7312bc79a2a78d00fb0b7a46bd0fac27f | |
parent | fd9de12a71109d1e3bb4b20e7d040fc9a1784dc2 (diff) | |
download | src-6eae573dc2298e3e0d97b0d829828a427254946c.tar.gz src-6eae573dc2298e3e0d97b0d829828a427254946c.zip |
ptsname.3: accommodate upcoming POSIX Issue 8 ptsname_r
POSIX has accepted a proposal[1] to add glibc-compatible ptsname_r. It
indicates an error by returning the error number, rather than returning
-1 and setting errno. Update RETURN VALUES in ptsname_r's man page now
to encourage folks to test that the return value != 0 rather than == -1.
[1] https://www.austingroupbugs.net/bug_view_page.php?bug_id=508
Reported by: Collin Funk
Reviewed by: kib
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D42204
(cherry picked from commit a5ed6a815e38d6c622cd97a6020592ded579cf7a)
-rw-r--r-- | lib/libc/stdlib/ptsname.3 | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/lib/libc/stdlib/ptsname.3 b/lib/libc/stdlib/ptsname.3 index 532ce9e92ae0..df23e9ae6129 100644 --- a/lib/libc/stdlib/ptsname.3 +++ b/lib/libc/stdlib/ptsname.3 @@ -29,7 +29,7 @@ .\" NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS .\" SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. .\" -.Dd October 17, 2020 +.Dd October 14, 2023 .Dt PTSNAME 3 .Os .Sh NAME @@ -104,7 +104,7 @@ function clears the lock held on the pseudo-terminal pair for the master device specified with .Fa fildes . .Sh RETURN VALUES -.Rv -std grantpt ptsname_r unlockpt +.Rv -std grantpt unlockpt .Pp The .Fn ptsname @@ -112,6 +112,19 @@ function returns a pointer to the name of the slave device on success; otherwise a .Dv NULL pointer is returned. +.Pp +The +.Fn ptsname_r +function returns the value 0 if successful; +otherwise a nonzero value is returned and the global variable +.Va errno +is set to indicate the error. +Note: +.Fn ptsname_r +was previously documented as returning -1 on error. +In the future it will be changed to return an error number, for POSIX +compatibility. +Therefore, callers should not check for -1. .Sh ERRORS The .Fn grantpt , |