#include "../git-compat-util.h"
+#include "../strbuf.h"
unsigned int _CRT_fmode = _O_BINARY;
return fd;
}
+static inline time_t filetime_to_time_t(const FILETIME *ft)
+{
+ long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
+ winTime -= 116444736000000000LL; /* Windows to Unix Epoch conversion */
+ winTime /= 10000000; /* Nano to seconds resolution */
+ return (time_t)winTime;
+}
+
+static inline size_t size_to_blocks(size_t s)
+{
+ return (s+511)/512;
+}
+
+extern int _getdrive( void );
+/* We keep the do_lstat code in a separate function to avoid recursion.
+ * When a path ends with a slash, the stat will fail with ENOENT. In
+ * this case, we strip the trailing slashes and stat again.
+ */
+static int do_lstat(const char *file_name, struct stat *buf)
+{
+ WIN32_FILE_ATTRIBUTE_DATA fdata;
+
+ if (GetFileAttributesExA(file_name, GetFileExInfoStandard, &fdata)) {
+ int fMode = S_IREAD;
+ if (fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
+ fMode |= S_IFDIR;
+ else
+ fMode |= S_IFREG;
+ if (!(fdata.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
+ fMode |= S_IWRITE;
+
+ buf->st_ino = 0;
+ buf->st_gid = 0;
+ buf->st_uid = 0;
+ buf->st_mode = fMode;
+ buf->st_size = fdata.nFileSizeLow; /* Can't use nFileSizeHigh, since it's not a stat64 */
+ buf->st_blocks = size_to_blocks(buf->st_size);
+ buf->st_dev = _getdrive() - 1;
+ buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
+ buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
+ buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
+ errno = 0;
+ return 0;
+ }
+
+ switch (GetLastError()) {
+ case ERROR_ACCESS_DENIED:
+ case ERROR_SHARING_VIOLATION:
+ case ERROR_LOCK_VIOLATION:
+ case ERROR_SHARING_BUFFER_EXCEEDED:
+ errno = EACCES;
+ break;
+ case ERROR_BUFFER_OVERFLOW:
+ errno = ENAMETOOLONG;
+ break;
+ case ERROR_NOT_ENOUGH_MEMORY:
+ errno = ENOMEM;
+ break;
+ default:
+ errno = ENOENT;
+ break;
+ }
+ return -1;
+}
+
+/* We provide our own lstat/fstat functions, since the provided
+ * lstat/fstat functions are so slow. These stat functions are
+ * tailored for Git's usage (read: fast), and are not meant to be
+ * complete. Note that Git stat()s are redirected to mingw_lstat()
+ * too, since Windows doesn't really handle symlinks that well.
+ */
+int mingw_lstat(const char *file_name, struct mingw_stat *buf)
+{
+ int namelen;
+ static char alt_name[PATH_MAX];
+
+ if (!do_lstat(file_name, buf))
+ return 0;
+
+ /* if file_name ended in a '/', Windows returned ENOENT;
+ * try again without trailing slashes
+ */
+ if (errno != ENOENT)
+ return -1;
+
+ namelen = strlen(file_name);
+ if (namelen && file_name[namelen-1] != '/')
+ return -1;
+ while (namelen && file_name[namelen-1] == '/')
+ --namelen;
+ if (!namelen || namelen >= PATH_MAX)
+ return -1;
+
+ memcpy(alt_name, file_name, namelen);
+ alt_name[namelen] = 0;
+ return do_lstat(alt_name, buf);
+}
+
+#undef fstat
+#undef stat
+int mingw_fstat(int fd, struct mingw_stat *buf)
+{
+ HANDLE fh = (HANDLE)_get_osfhandle(fd);
+ BY_HANDLE_FILE_INFORMATION fdata;
+
+ if (fh == INVALID_HANDLE_VALUE) {
+ errno = EBADF;
+ return -1;
+ }
+ /* direct non-file handles to MS's fstat() */
+ if (GetFileType(fh) != FILE_TYPE_DISK) {
+ struct stat st;
+ if (fstat(fd, &st))
+ return -1;
+ buf->st_ino = st.st_ino;
+ buf->st_gid = st.st_gid;
+ buf->st_uid = st.st_uid;
+ buf->st_mode = st.st_mode;
+ buf->st_size = st.st_size;
+ buf->st_blocks = size_to_blocks(buf->st_size);
+ buf->st_dev = st.st_dev;
+ buf->st_atime = st.st_atime;
+ buf->st_mtime = st.st_mtime;
+ buf->st_ctime = st.st_ctime;
+ return 0;
+ }
+
+ if (GetFileInformationByHandle(fh, &fdata)) {
+ int fMode = S_IREAD;
+ if (fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
+ fMode |= S_IFDIR;
+ else
+ fMode |= S_IFREG;
+ if (!(fdata.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
+ fMode |= S_IWRITE;
+
+ buf->st_ino = 0;
+ buf->st_gid = 0;
+ buf->st_uid = 0;
+ buf->st_mode = fMode;
+ buf->st_size = fdata.nFileSizeLow; /* Can't use nFileSizeHigh, since it's not a stat64 */
+ buf->st_blocks = size_to_blocks(buf->st_size);
+ buf->st_dev = _getdrive() - 1;
+ buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
+ buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
+ buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
+ return 0;
+ }
+ errno = EBADF;
+ return -1;
+}
+
+static inline void time_t_to_filetime(time_t t, FILETIME *ft)
+{
+ long long winTime = t * 10000000LL + 116444736000000000LL;
+ ft->dwLowDateTime = winTime;
+ ft->dwHighDateTime = winTime >> 32;
+}
+
+int mingw_utime (const char *file_name, const struct utimbuf *times)
+{
+ FILETIME mft, aft;
+ int fh, rc;
+
+ /* must have write permission */
+ if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0)
+ return -1;
+
+ time_t_to_filetime(times->modtime, &mft);
+ time_t_to_filetime(times->actime, &aft);
+ if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
+ errno = EINVAL;
+ rc = -1;
+ } else
+ rc = 0;
+ close(fh);
+ return rc;
+}
+
unsigned int sleep (unsigned int seconds)
{
Sleep(seconds*1000);
return 0;
}
+int pipe(int filedes[2])
+{
+ int fd;
+ HANDLE h[2], parent;
+
+ if (_pipe(filedes, 8192, 0) < 0)
+ return -1;
+
+ parent = GetCurrentProcess();
+
+ if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[0]),
+ parent, &h[0], 0, FALSE, DUPLICATE_SAME_ACCESS)) {
+ close(filedes[0]);
+ close(filedes[1]);
+ return -1;
+ }
+ if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[1]),
+ parent, &h[1], 0, FALSE, DUPLICATE_SAME_ACCESS)) {
+ close(filedes[0]);
+ close(filedes[1]);
+ CloseHandle(h[0]);
+ return -1;
+ }
+ fd = _open_osfhandle((int)h[0], O_NOINHERIT);
+ if (fd < 0) {
+ close(filedes[0]);
+ close(filedes[1]);
+ CloseHandle(h[0]);
+ CloseHandle(h[1]);
+ return -1;
+ }
+ close(filedes[0]);
+ filedes[0] = fd;
+ fd = _open_osfhandle((int)h[1], O_NOINHERIT);
+ if (fd < 0) {
+ close(filedes[0]);
+ close(filedes[1]);
+ CloseHandle(h[1]);
+ return -1;
+ }
+ close(filedes[1]);
+ filedes[1] = fd;
+ return 0;
+}
+
int poll(struct pollfd *ufds, unsigned int nfds, int timeout)
{
- return -1;
+ int i, pending;
+
+ if (timeout != -1)
+ return errno = EINVAL, error("poll timeout not supported");
+
+ /* When there is only one fd to wait for, then we pretend that
+ * input is available and let the actual wait happen when the
+ * caller invokes read().
+ */
+ if (nfds == 1) {
+ if (!(ufds[0].events & POLLIN))
+ return errno = EINVAL, error("POLLIN not set");
+ ufds[0].revents = POLLIN;
+ return 0;
+ }
+
+repeat:
+ pending = 0;
+ for (i = 0; i < nfds; i++) {
+ DWORD avail = 0;
+ HANDLE h = (HANDLE) _get_osfhandle(ufds[i].fd);
+ if (h == INVALID_HANDLE_VALUE)
+ return -1; /* errno was set */
+
+ if (!(ufds[i].events & POLLIN))
+ return errno = EINVAL, error("POLLIN not set");
+
+ /* this emulation works only for pipes */
+ if (!PeekNamedPipe(h, NULL, 0, NULL, &avail, NULL)) {
+ int err = GetLastError();
+ if (err == ERROR_BROKEN_PIPE) {
+ ufds[i].revents = POLLHUP;
+ pending++;
+ } else {
+ errno = EINVAL;
+ return error("PeekNamedPipe failed,"
+ " GetLastError: %u", err);
+ }
+ } else if (avail) {
+ ufds[i].revents = POLLIN;
+ pending++;
+ } else
+ ufds[i].revents = 0;
+ }
+ if (!pending) {
+ /* The only times that we spin here is when the process
+ * that is connected through the pipes is waiting for
+ * its own input data to become available. But since
+ * the process (pack-objects) is itself CPU intensive,
+ * it will happily pick up the time slice that we are
+ * relinguishing here.
+ */
+ Sleep(0);
+ goto repeat;
+ }
+ return 0;
}
struct tm *gmtime_r(const time_t *timep, struct tm *result)
return ret;
}
+#undef getenv
+char *mingw_getenv(const char *name)
+{
+ char *result = getenv(name);
+ if (!result && !strcmp(name, "TMPDIR")) {
+ /* on Windows it is TMP and TEMP */
+ result = getenv("TMP");
+ if (!result)
+ result = getenv("TEMP");
+ }
+ return result;
+}
+
+/*
+ * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
+ * (Parsing C++ Command-Line Arguments)
+ */
+static const char *quote_arg(const char *arg)
+{
+ /* count chars to quote */
+ int len = 0, n = 0;
+ int force_quotes = 0;
+ char *q, *d;
+ const char *p = arg;
+ if (!*p) force_quotes = 1;
+ while (*p) {
+ if (isspace(*p) || *p == '*' || *p == '?' || *p == '{')
+ force_quotes = 1;
+ else if (*p == '"')
+ n++;
+ else if (*p == '\\') {
+ int count = 0;
+ while (*p == '\\') {
+ count++;
+ p++;
+ len++;
+ }
+ if (*p == '"')
+ n += count*2 + 1;
+ continue;
+ }
+ len++;
+ p++;
+ }
+ if (!force_quotes && n == 0)
+ return arg;
+
+ /* insert \ where necessary */
+ d = q = xmalloc(len+n+3);
+ *d++ = '"';
+ while (*arg) {
+ if (*arg == '"')
+ *d++ = '\\';
+ else if (*arg == '\\') {
+ int count = 0;
+ while (*arg == '\\') {
+ count++;
+ *d++ = *arg++;
+ }
+ if (*arg == '"') {
+ while (count-- > 0)
+ *d++ = '\\';
+ *d++ = '\\';
+ }
+ }
+ *d++ = *arg++;
+ }
+ *d++ = '"';
+ *d++ = 0;
+ return q;
+}
+
+static const char *parse_interpreter(const char *cmd)
+{
+ static char buf[100];
+ char *p, *opt;
+ int n, fd;
+
+ /* don't even try a .exe */
+ n = strlen(cmd);
+ if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
+ return NULL;
+
+ fd = open(cmd, O_RDONLY);
+ if (fd < 0)
+ return NULL;
+ n = read(fd, buf, sizeof(buf)-1);
+ close(fd);
+ if (n < 4) /* at least '#!/x' and not error */
+ return NULL;
+
+ if (buf[0] != '#' || buf[1] != '!')
+ return NULL;
+ buf[n] = '\0';
+ p = strchr(buf, '\n');
+ if (!p)
+ return NULL;
+
+ *p = '\0';
+ if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
+ return NULL;
+ /* strip options */
+ if ((opt = strchr(p+1, ' ')))
+ *opt = '\0';
+ return p+1;
+}
+
+/*
+ * Splits the PATH into parts.
+ */
+static char **get_path_split(void)
+{
+ char *p, **path, *envpath = getenv("PATH");
+ int i, n = 0;
+
+ if (!envpath || !*envpath)
+ return NULL;
+
+ envpath = xstrdup(envpath);
+ p = envpath;
+ while (p) {
+ char *dir = p;
+ p = strchr(p, ';');
+ if (p) *p++ = '\0';
+ if (*dir) { /* not earlier, catches series of ; */
+ ++n;
+ }
+ }
+ if (!n)
+ return NULL;
+
+ path = xmalloc((n+1)*sizeof(char*));
+ p = envpath;
+ i = 0;
+ do {
+ if (*p)
+ path[i++] = xstrdup(p);
+ p = p+strlen(p)+1;
+ } while (i < n);
+ path[i] = NULL;
+
+ free(envpath);
+
+ return path;
+}
+
+static void free_path_split(char **path)
+{
+ if (!path)
+ return;
+
+ char **p = path;
+ while (*p)
+ free(*p++);
+ free(path);
+}
+
+/*
+ * exe_only means that we only want to detect .exe files, but not scripts
+ * (which do not have an extension)
+ */
+static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
+{
+ char path[MAX_PATH];
+ snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
+
+ if (!isexe && access(path, F_OK) == 0)
+ return xstrdup(path);
+ path[strlen(path)-4] = '\0';
+ if ((!exe_only || isexe) && access(path, F_OK) == 0)
+ return xstrdup(path);
+ return NULL;
+}
+
+/*
+ * Determines the absolute path of cmd using the the split path in path.
+ * If cmd contains a slash or backslash, no lookup is performed.
+ */
+static char *path_lookup(const char *cmd, char **path, int exe_only)
+{
+ char *prog = NULL;
+ int len = strlen(cmd);
+ int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
+
+ if (strchr(cmd, '/') || strchr(cmd, '\\'))
+ prog = xstrdup(cmd);
+
+ while (!prog && *path)
+ prog = lookup_prog(*path++, cmd, isexe, exe_only);
+
+ return prog;
+}
+
+static int env_compare(const void *a, const void *b)
+{
+ char *const *ea = a;
+ char *const *eb = b;
+ return strcasecmp(*ea, *eb);
+}
+
+static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
+ int prepend_cmd)
+{
+ STARTUPINFO si;
+ PROCESS_INFORMATION pi;
+ struct strbuf envblk, args;
+ unsigned flags;
+ BOOL ret;
+
+ /* Determine whether or not we are associated to a console */
+ HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
+ FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
+ FILE_ATTRIBUTE_NORMAL, NULL);
+ if (cons == INVALID_HANDLE_VALUE) {
+ /* There is no console associated with this process.
+ * Since the child is a console process, Windows
+ * would normally create a console window. But
+ * since we'll be redirecting std streams, we do
+ * not need the console.
+ */
+ flags = CREATE_NO_WINDOW;
+ } else {
+ /* There is already a console. If we specified
+ * CREATE_NO_WINDOW here, too, Windows would
+ * disassociate the child from the console.
+ * Go figure!
+ */
+ flags = 0;
+ CloseHandle(cons);
+ }
+ memset(&si, 0, sizeof(si));
+ si.cb = sizeof(si);
+ si.dwFlags = STARTF_USESTDHANDLES;
+ si.hStdInput = (HANDLE) _get_osfhandle(0);
+ si.hStdOutput = (HANDLE) _get_osfhandle(1);
+ si.hStdError = (HANDLE) _get_osfhandle(2);
+
+ /* concatenate argv, quoting args as we go */
+ strbuf_init(&args, 0);
+ if (prepend_cmd) {
+ char *quoted = (char *)quote_arg(cmd);
+ strbuf_addstr(&args, quoted);
+ if (quoted != cmd)
+ free(quoted);
+ }
+ for (; *argv; argv++) {
+ char *quoted = (char *)quote_arg(*argv);
+ if (*args.buf)
+ strbuf_addch(&args, ' ');
+ strbuf_addstr(&args, quoted);
+ if (quoted != *argv)
+ free(quoted);
+ }
+
+ if (env) {
+ int count = 0;
+ char **e, **sorted_env;
+
+ for (e = env; *e; e++)
+ count++;
+
+ /* environment must be sorted */
+ sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
+ memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
+ qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
+
+ strbuf_init(&envblk, 0);
+ for (e = sorted_env; *e; e++) {
+ strbuf_addstr(&envblk, *e);
+ strbuf_addch(&envblk, '\0');
+ }
+ free(sorted_env);
+ }
+
+ memset(&pi, 0, sizeof(pi));
+ ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
+ env ? envblk.buf : NULL, NULL, &si, &pi);
+
+ if (env)
+ strbuf_release(&envblk);
+ strbuf_release(&args);
+
+ if (!ret) {
+ errno = ENOENT;
+ return -1;
+ }
+ CloseHandle(pi.hThread);
+ return (pid_t)pi.hProcess;
+}
+
+pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env)
+{
+ pid_t pid;
+ char **path = get_path_split();
+ char *prog = path_lookup(cmd, path, 0);
+
+ if (!prog) {
+ errno = ENOENT;
+ pid = -1;
+ }
+ else {
+ const char *interpr = parse_interpreter(prog);
+
+ if (interpr) {
+ const char *argv0 = argv[0];
+ char *iprog = path_lookup(interpr, path, 1);
+ argv[0] = prog;
+ if (!iprog) {
+ errno = ENOENT;
+ pid = -1;
+ }
+ else {
+ pid = mingw_spawnve(iprog, argv, env, 1);
+ free(iprog);
+ }
+ argv[0] = argv0;
+ }
+ else
+ pid = mingw_spawnve(prog, argv, env, 0);
+ free(prog);
+ }
+ free_path_split(path);
+ return pid;
+}
+
+static int try_shell_exec(const char *cmd, char *const *argv, char **env)
+{
+ const char *interpr = parse_interpreter(cmd);
+ char **path;
+ char *prog;
+ int pid = 0;
+
+ if (!interpr)
+ return 0;
+ path = get_path_split();
+ prog = path_lookup(interpr, path, 1);
+ if (prog) {
+ int argc = 0;
+ const char **argv2;
+ while (argv[argc]) argc++;
+ argv2 = xmalloc(sizeof(*argv) * (argc+1));
+ argv2[0] = (char *)cmd; /* full path to the script file */
+ memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
+ pid = mingw_spawnve(prog, argv2, env, 1);
+ if (pid >= 0) {
+ int status;
+ if (waitpid(pid, &status, 0) < 0)
+ status = 255;
+ exit(status);
+ }
+ pid = 1; /* indicate that we tried but failed */
+ free(prog);
+ free(argv2);
+ }
+ free_path_split(path);
+ return pid;
+}
+
+static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
+{
+ /* check if git_command is a shell script */
+ if (!try_shell_exec(cmd, argv, (char **)env)) {
+ int pid, status;
+
+ pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
+ if (pid < 0)
+ return;
+ if (waitpid(pid, &status, 0) < 0)
+ status = 255;
+ exit(status);
+ }
+}
+
+void mingw_execvp(const char *cmd, char *const *argv)
+{
+ char **path = get_path_split();
+ char *prog = path_lookup(cmd, path, 0);
+
+ if (prog) {
+ mingw_execve(prog, argv, environ);
+ free(prog);
+ } else
+ errno = ENOENT;
+
+ free_path_split(path);
+}
+
+char **copy_environ()
+{
+ char **env;
+ int i = 0;
+ while (environ[i])
+ i++;
+ env = xmalloc((i+1)*sizeof(*env));
+ for (i = 0; environ[i]; i++)
+ env[i] = xstrdup(environ[i]);
+ env[i] = NULL;
+ return env;
+}
+
+void free_environ(char **env)
+{
+ int i;
+ for (i = 0; env[i]; i++)
+ free(env[i]);
+ free(env);
+}
+
+static int lookup_env(char **env, const char *name, size_t nmln)
+{
+ int i;
+
+ for (i = 0; env[i]; i++) {
+ if (0 == strncmp(env[i], name, nmln)
+ && '=' == env[i][nmln])
+ /* matches */
+ return i;
+ }
+ return -1;
+}
+
+/*
+ * If name contains '=', then sets the variable, otherwise it unsets it
+ */
+char **env_setenv(char **env, const char *name)
+{
+ char *eq = strchrnul(name, '=');
+ int i = lookup_env(env, name, eq-name);
+
+ if (i < 0) {
+ if (*eq) {
+ for (i = 0; env[i]; i++)
+ ;
+ env = xrealloc(env, (i+2)*sizeof(*env));
+ env[i] = xstrdup(name);
+ env[i+1] = NULL;
+ }
+ }
+ else {
+ free(env[i]);
+ if (*eq)
+ env[i] = xstrdup(name);
+ else
+ for (; env[i]; i++)
+ env[i] = env[i+1];
+ }
+ return env;
+}
+
+/* this is the first function to call into WS_32; initialize it */
+#undef gethostbyname
+struct hostent *mingw_gethostbyname(const char *host)
+{
+ WSADATA wsa;
+
+ if (WSAStartup(MAKEWORD(2,2), &wsa))
+ die("unable to initialize winsock subsystem, error %d",
+ WSAGetLastError());
+ atexit((void(*)(void)) WSACleanup);
+ return gethostbyname(host);
+}
+
+int mingw_socket(int domain, int type, int protocol)
+{
+ int sockfd;
+ SOCKET s = WSASocket(domain, type, protocol, NULL, 0, 0);
+ if (s == INVALID_SOCKET) {
+ /*
+ * WSAGetLastError() values are regular BSD error codes
+ * biased by WSABASEERR.
+ * However, strerror() does not know about networking
+ * specific errors, which are values beginning at 38 or so.
+ * Therefore, we choose to leave the biased error code
+ * in errno so that _if_ someone looks up the code somewhere,
+ * then it is at least the number that are usually listed.
+ */
+ errno = WSAGetLastError();
+ return -1;
+ }
+ /* convert into a file descriptor */
+ if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
+ closesocket(s);
+ return error("unable to make a socket file descriptor: %s",
+ strerror(errno));
+ }
+ return sockfd;
+}
+
+#undef connect
+int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
+{
+ SOCKET s = (SOCKET)_get_osfhandle(sockfd);
+ return connect(s, sa, sz);
+}
+
#undef rename
int mingw_rename(const char *pold, const char *pnew)
{
return &p;
}
+static HANDLE timer_event;
+static HANDLE timer_thread;
+static int timer_interval;
+static int one_shot;
+static sig_handler_t timer_fn = SIG_DFL;
+
+/* The timer works like this:
+ * The thread, ticktack(), is a trivial routine that most of the time
+ * only waits to receive the signal to terminate. The main thread tells
+ * the thread to terminate by setting the timer_event to the signalled
+ * state.
+ * But ticktack() interrupts the wait state after the timer's interval
+ * length to call the signal handler.
+ */
+
+static __stdcall unsigned ticktack(void *dummy)
+{
+ while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
+ if (timer_fn == SIG_DFL)
+ die("Alarm");
+ if (timer_fn != SIG_IGN)
+ timer_fn(SIGALRM);
+ if (one_shot)
+ break;
+ }
+ return 0;
+}
+
+static int start_timer_thread(void)
+{
+ timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
+ if (timer_event) {
+ timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
+ if (!timer_thread )
+ return errno = ENOMEM,
+ error("cannot start timer thread");
+ } else
+ return errno = ENOMEM,
+ error("cannot allocate resources for timer");
+ return 0;
+}
+
+static void stop_timer_thread(void)
+{
+ if (timer_event)
+ SetEvent(timer_event); /* tell thread to terminate */
+ if (timer_thread) {
+ int rc = WaitForSingleObject(timer_thread, 1000);
+ if (rc == WAIT_TIMEOUT)
+ error("timer thread did not terminate timely");
+ else if (rc != WAIT_OBJECT_0)
+ error("waiting for timer thread failed: %lu",
+ GetLastError());
+ CloseHandle(timer_thread);
+ }
+ if (timer_event)
+ CloseHandle(timer_event);
+ timer_event = NULL;
+ timer_thread = NULL;
+}
+
+static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
+{
+ return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
+}
+
int setitimer(int type, struct itimerval *in, struct itimerval *out)
{
- return -1;
+ static const struct timeval zero;
+ static int atexit_done;
+
+ if (out != NULL)
+ return errno = EINVAL,
+ error("setitimer param 3 != NULL not implemented");
+ if (!is_timeval_eq(&in->it_interval, &zero) &&
+ !is_timeval_eq(&in->it_interval, &in->it_value))
+ return errno = EINVAL,
+ error("setitimer: it_interval must be zero or eq it_value");
+
+ if (timer_thread)
+ stop_timer_thread();
+
+ if (is_timeval_eq(&in->it_value, &zero) &&
+ is_timeval_eq(&in->it_interval, &zero))
+ return 0;
+
+ timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
+ one_shot = is_timeval_eq(&in->it_interval, &zero);
+ if (!atexit_done) {
+ atexit(stop_timer_thread);
+ atexit_done = 1;
+ }
+ return start_timer_thread();
}
int sigaction(int sig, struct sigaction *in, struct sigaction *out)
{
- return -1;
+ if (sig != SIGALRM)
+ return errno = EINVAL,
+ error("sigaction only implemented for SIGALRM");
+ if (out != NULL)
+ return errno = EINVAL,
+ error("sigaction: param 3 != NULL not implemented");
+
+ timer_fn = in->sa_handler;
+ return 0;
+}
+
+#undef signal
+sig_handler_t mingw_signal(int sig, sig_handler_t handler)
+{
+ if (sig != SIGALRM)
+ return signal(sig, handler);
+ sig_handler_t old = timer_fn;
+ timer_fn = handler;
+ return old;
}