By Oleg's request. Signed-off-by: Denys Vlasenko <dvlasenk@xxxxxxxxxx> CC: linux-man@xxxxxxxxxxxxxxx CC: Oleg Nesterov <oleg@xxxxxxxxxx> CC: Jan Kratochvil <jan.kratochvil@xxxxxxxxxx> CC: Dmitry V. Levin <ldv@xxxxxxxxxxxx> --- man2/ptrace.2 | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/man2/ptrace.2 b/man2/ptrace.2 index 55c4fe2..a6e01a0 100644 --- a/man2/ptrace.2 +++ b/man2/ptrace.2 @@ -1776,8 +1776,15 @@ the report is sent only once. .SH RETURN VALUE On success, .B PTRACE_PEEK* -requests return the requested data, -while other requests return zero. +requests return the requested data, while other requests return zero. +(On Linux, this is done in the libc wrapper around ptrace system call. +On the system call level, +.B PTRACE_PEEK* +requests have a different API: they store the result +at the address specified by +.I data +parameter, and return value is the error flag.) +.LP On error, all requests return \-1, and .I errno is set appropriately. -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
