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Fix text that warns against use of NULL argv and envp. 

Using a NULL envp does in fact seem to be portable (works
on Solaris and FreeBSD), but the Linux semantics for a NULL
argv certainly aren't consistent with other implementations.
See http://bugzilla.kernel.org/show_bug.cgi?id=8408.
This commit is contained in:
Michael Kerrisk 2008-06-12 10:11:21 +00:00
parent 5c1decfcc2
commit 34dcae5481
1 changed files with 4 additions and 5 deletions
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9
man2/execve.2
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@ -467,14 +467,13 @@ are used to delimit the arguments.
On Linux,
.I argv
and
.I envp
can be specified as NULL,
which has the same effect as specifying these arguments
as pointers to lists containing a single NULL pointer.
which has the same effect as specifying this argument
as a pointer to a list containing a single NULL pointer.
.B "Do not take advantage of this misfeature!"
It is non-standard and non-portable:
on most other Unix systems doing this will result in an error.
on most other Unix systems doing this will result in an error
.RB ( EFAULT ).
.\" e.g., EFAULT on Solaris 8 and FreeBSD 6.1; but
.\" HP-UX 11 is like Linux -- mtk, Apr 2007
.\" FIXME .