Hi Rik, On Wed, Oct 11, 2023 at 10:11:34AM -0400, Rik van Riel wrote: > The execve syscall returns -E2BIG in 3 cases: > - The total length of the command line arguments and environment is too large. > - An argument or environment string is longer than MAX_ARG_STRLEN. Please mention that this includes the terminating NUL, as Matthew confirmed. Otherwise, to user-space programmers, this would usually be interpreted as `strlen(p) > MAX_ARG_STRLEN`. An example program that demonstrates the limit would be very interesting here. Thanks, Alex > - The full path to the executable exceeds MAX_ARG_STRLEN. > > Spell out all 3 cases in the -E2BIG section. > > Discovered by moving a too large commandline parameter to an environment > variable, and finding that things still did not work. Examined the code > in fs/exec.c to get the details. > > Signed-off-by: Rik van Riel <riel@xxxxxxxxxxx> > Suggested-by: Matthew House <mattlloydhouse@xxxxxxxxx> > --- > man2/execve.2 | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/man2/execve.2 b/man2/execve.2 > index 0d9582492ad1..85c6ec15df3c 100644 > --- a/man2/execve.2 > +++ b/man2/execve.2 > @@ -449,7 +449,8 @@ The total number of bytes in the environment > .RI ( envp ) > and argument list > .RI ( argv ) > -is too large. > +is too large, an argument or environment string is too long, or > +the full path name to the executable is too long. > .TP > .B EACCES > Search permission is denied on a component of the path prefix of > -- > 2.41.0 > > -- <https://www.alejandro-colomar.es/>
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