Author: Willie

Willie has over 15 years of experience in Linux system administration and DevOps. After managing infrastructure for startups and enterprises alike, he founded Command Linux to share the practical knowledge he wished he had when starting out. He oversees content strategy and contributes guides on server management, automation, and security.

man page

MMAP

By

NAME mmap, munmap – map or unmap files or devices into memory SYNOPSIS #include <sys/mman.h> void *mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset); int munmap(void *addr, size_t length); See NOTES for information on feature test macro requirements. DESCRIPTION mmap() creates a new mapping in the virtual address space of the calling process. The starting address for the new mapping is specified in addr. The length argument specifies the length of the mapping. If addr is NULL, then the kernel chooses the address at which to create the mapping; this is the most…

Read More
man page

GETADDRINFO

By

NAME getaddrinfo, freeaddrinfo, gai_strerror – network address and service translation SYNOPSIS #include <sys/types.h> #include <sys/socket.h> #include <netdb.h> int getaddrinfo(const char *node, const char *service, const struct addrinfo *hints, struct addrinfo **res); void freeaddrinfo(struct addrinfo *res); const char *gai_strerror(int errcode); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): getaddrinfo(), freeaddrinfo(), gai_strerror(): _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _POSIX_SOURCE DESCRIPTION Given node and service, which identify an Internet host and a service, getaddrinfo() returns one or more addrinfo structures, each of which contains an Internet address that can be specified in a call to bind(2) or connect(2). The getaddrinfo() function combines…

Read More