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setuid(2): Suggest O_CLOEXEC instead of fcntl(F_SETFD).

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This commit is contained in:
Jilles Tjoelker 2015-09-13 14:00:49 +00:00
parent 844c2a3a94
commit 6b46581ed9
1 changed files with 2 additions and 7 deletions
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9
lib/libc/sys/setuid.2
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@ -28,7 +28,7 @@
.\" @(#)setuid.2 8.1 (Berkeley) 6/4/93 .\" @(#)setuid.2 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$ .\" $FreeBSD$
.\" .\"
.Dd June 4, 1993 .Dd September 13, 2015
.Dt SETUID 2 .Dt SETUID 2
.Os .Os
.Sh NAME .Sh NAME
@ -178,15 +178,10 @@ pseudocode(void)
int fd; int fd;
/* ... */ /* ... */
fd = open("/path/to/sensitive/data", O_RDWR); fd = open("/path/to/sensitive/data", O_RDWR | O_CLOEXEC);
if (fd == -1) if (fd == -1)
err(1, "open"); err(1, "open");
/*
* Set close-on-exec flag; see fcntl(2) for more information.
*/
if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
err(1, "fcntl(F_SETFD)");
/* ... */ /* ... */
execve(path, argv, environ); execve(path, argv, environ);
} }