cosmopolitan/libc/sock/ifaddrs.h

#ifndef COSMOPOLITAN_LIBC_SOCK_IFADDRS_H_
#define COSMOPOLITAN_LIBC_SOCK_IFADDRS_H_
#include "libc/sock/struct/sockaddr.h"
COSMOPOLITAN_C_START_

struct ifaddrs {
  struct ifaddrs *ifa_next;
  char *ifa_name;
  unsigned ifa_flags;
  struct sockaddr *ifa_addr;
  struct sockaddr *ifa_netmask;
  union {
    struct sockaddr *ifa_broadaddr;
    struct sockaddr *ifa_dstaddr;
  };
  void *ifa_data;
};

void freeifaddrs(struct ifaddrs *) libcesque;
int getifaddrs(struct ifaddrs **) libcesque;

COSMOPOLITAN_C_END_
#endif /* COSMOPOLITAN_LIBC_SOCK_IFADDRS_H_ */
Introduce getifaddrs() This function was invented by the BSDs (it's not in POSIX.1). It provides a high-level interface into ioctl(SIOCGIFCONF) which is comparatively clumsy to use. We already made the ioctls portable across our entire support vector back in 2021, so this interface is portable too. See o//tool/viz/getifaddrs.com for our demo app 2023-11-02 15:22:30 +00:00			`#ifndef COSMOPOLITAN_LIBC_SOCK_IFADDRS_H_`
			`#define COSMOPOLITAN_LIBC_SOCK_IFADDRS_H_`
			`#include "libc/sock/struct/sockaddr.h"`
			`COSMOPOLITAN_C_START_`

			`struct ifaddrs {`
			`struct ifaddrs *ifa_next;`
			`char *ifa_name;`
			`unsigned ifa_flags;`
			`struct sockaddr *ifa_addr;`
			`struct sockaddr *ifa_netmask;`
			`union {`
			`struct sockaddr *ifa_broadaddr;`
			`struct sockaddr *ifa_dstaddr;`
			`};`
			`void *ifa_data;`
			`};`

Add `dontthrow` attribute to most libc functions This will help C++ code that uses exceptions to be tinier. For example, this change shaves away 1000 lines of assembly code from LLVM's libcxx, which is 0.7% of all assembly instructions in the entire library. 2024-01-09 09:26:03 +00:00			`void freeifaddrs(struct ifaddrs *) libcesque;`
			`int getifaddrs(struct ifaddrs **) libcesque;`
Introduce getifaddrs() This function was invented by the BSDs (it's not in POSIX.1). It provides a high-level interface into ioctl(SIOCGIFCONF) which is comparatively clumsy to use. We already made the ioctls portable across our entire support vector back in 2021, so this interface is portable too. See o//tool/viz/getifaddrs.com for our demo app 2023-11-02 15:22:30 +00:00
			`COSMOPOLITAN_C_END_`
			`#endif /* COSMOPOLITAN_LIBC_SOCK_IFADDRS_H_ */`