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109 lines
2.0 KiB
C
109 lines
2.0 KiB
C
// dummy system calls to eliminate the following GNU linker warning:
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// "warning: xxxx is not implemented and will always fail"
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <stdio.h>
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#include <signal.h>
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#include <time.h>
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#include <sys/time.h>
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#include <sys/times.h>
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extern int __io_putchar(int ch) __attribute__((weak));
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extern int __io_getchar(void) __attribute__((weak));
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char *__env[1] = { 0 };
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char **environ = __env;
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void initialise_monitor_handles() {
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}
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int _getpid(void) {
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return 1;
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}
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int _kill(int pid, int sig) {
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(void)pid;
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(void)sig;
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errno = EINVAL;
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return -1;
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}
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void _exit (int status) {
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_kill(status, -1);
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while (1) { // do not return
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}
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}
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__attribute__((weak)) int _read(int file, char *ptr, int len) {
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(void)file;
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for (int i = len; i != 0; --i) {
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*ptr++ = __io_getchar();
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}
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return len;
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}
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__attribute__((weak)) int _write(int file, char *ptr, int len) {
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(void)file;
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for (int i = len; i != 0; --i) {
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__io_putchar(*ptr++);
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}
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return len;
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}
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int _close(int file) {
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(void)file;
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return -1;
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}
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int _fstat(int file, struct stat *st) {
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(void)file;
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st->st_mode = S_IFCHR;
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return 0;
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}
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int _isatty(int file) {
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(void)file;
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return 1;
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}
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int _lseek(int file, int ptr, int dir) {
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(void)file;
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(void)ptr;
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(void)dir;
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return 0;
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}
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int _open(char *path, int flags, ...) {
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(void)path;
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(void)flags;
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return -1;
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}
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int _wait(int *status) {
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(void)status;
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errno = ECHILD;
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return -1;
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}
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int _unlink(char *name) {
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(void)name;
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errno = ENOENT;
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return -1;
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}
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int _times(struct tms *buf) {
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(void)buf;
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return -1;
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}
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int _stat(char *file, struct stat *st) {
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(void)file;
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st->st_mode = S_IFCHR;
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return 0;
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}
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int _link(char *old, char *new) {
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(void)old;
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(void)new;
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errno = EMLINK;
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return -1;
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}
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int _fork(void) {
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errno = EAGAIN;
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return -1;
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}
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int _execve(char *name, char **argv, char **env) {
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(void)name;
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(void)argv;
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(void)env;
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errno = ENOMEM;
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return -1;
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}
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