WebLocally detected errors are indicated by a return value of -1. When the message does not fit into the send buffer of the socket, send () normally blocks, unless the socket has been placed in nonblocking I/O mode. In nonblocking mode it would fail with the error EAGAIN or EWOULDBLOCK in this case. WebThe ptrace () system call provides a means by which a parent process may observe and control the execution of another process, and examine and change its core image and registers. It is primarily used to implement breakpoint debugging and system call tracing.
Anatomy of a system call, part 1 [LWN.net]
Web(RAW and UDP) Returns the path MTU value for the source of a connected socket. The data is passed in a structure as defined in netinet/in.h. IPV6_PKTINFO (RAW and UDP) Returns the source IP address for an outgoing packet and the outgoing interface. The data is passed in an in6_pktinfo structure as defined in netinet/in.h. WebIf the processor is in suspended state when a syscall is made, the syscall will be performed as normal, and will return as normal. The syscall will be performed in suspended state, so … files updating
syscall(2): indirect system call - Linux man page
WebThe return value is defined by the system call being invoked. In general, a 0 return value indicates success. A -1 return value indicates an error, and an error number is stored in errno. NOTES syscall () first appeared in 4BSD. Architecture-specific requirements WebNov 9, 2024 · Basically there are total 5 types of I/O system calls: 1. Create: Used to Create a new empty file. Syntax in C language: int create (char *filename, mode_t mode) Parameter: filename : name of the file which you want to create mode : … WebFeb 14, 2011 · Tracing the return lets us examine the return value of functions, follow the code path, and measure the time spent for functions. For some functions, the entry arguments have a pointer which is only populated on return, which is only valid when examined in the return probe. Return Value file summary template