On Thu, Nov 12, 2020 at 09:22:45AM -0600, Derek Martin wrote: > One point that is not clear to me is, the sigaction manpage explicitly > calls out execve, rather than the whole exec family. It seems to > suggest that execvp (which is what mutt is using to spawn the sendmail > process) doesn't do that. It could be a case of the man page being > incorrectly overly specific, or just out of date...
sigaction and execve are system calls in section 2 of the manual, whereas execvp et al are in section 3 and are library functions - in fact the man page says in the first paragraph that they are front-ends for execve(2). You knew that of course, but I think the point is partly that the man pages in section 2 don't really care what your user-space library does[*] and partly that it *is* documented albeit not all in the one place. imc [*] That's not true obviously, because sigaction(2) also talks about sigqueue(3) and raise(3). But maybe the difference there is that these are POSIX functions implemented by non-POSIX syscalls. Or I could just be talking rubbish.
