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-rw-r--r--compat/mingw.c184
1 files changed, 121 insertions, 63 deletions
diff --git a/compat/mingw.c b/compat/mingw.c
index 0d73f15fa8..f2d9e1fd97 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -3,9 +3,7 @@
#include <conio.h>
#include "../strbuf.h"
-#include <shellapi.h>
-
-static int err_win_to_posix(DWORD winerr)
+int err_win_to_posix(DWORD winerr)
{
int error = ENOSYS;
switch(winerr) {
@@ -142,12 +140,53 @@ int mingw_open (const char *filename, int oflags, ...)
return fd;
}
-static inline time_t filetime_to_time_t(const FILETIME *ft)
+#undef write
+ssize_t mingw_write(int fd, const void *buf, size_t count)
+{
+ /*
+ * While write() calls to a file on a local disk are translated
+ * into WriteFile() calls with a maximum size of 64KB on Windows
+ * XP and 256KB on Vista, no such cap is placed on writes to
+ * files over the network on Windows XP. Unfortunately, there
+ * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
+ * bigger writes fail on Windows XP.
+ * So we cap to a nice 31MB here to avoid write failures over
+ * the net without changing the number of WriteFile() calls in
+ * the local case.
+ */
+ return write(fd, buf, min(count, 31 * 1024 * 1024));
+}
+
+#undef fopen
+FILE *mingw_fopen (const char *filename, const char *otype)
+{
+ if (!strcmp(filename, "/dev/null"))
+ filename = "nul";
+ return fopen(filename, otype);
+}
+
+#undef freopen
+FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
+{
+ if (filename && !strcmp(filename, "/dev/null"))
+ filename = "nul";
+ return freopen(filename, otype, stream);
+}
+
+/*
+ * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
+ * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
+ */
+static inline long long filetime_to_hnsec(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;
+ /* Windows to Unix Epoch conversion */
+ return winTime - 116444736000000000LL;
+}
+
+static inline time_t filetime_to_time_t(const FILETIME *ft)
+{
+ return (time_t)(filetime_to_hnsec(ft) / 10000000);
}
/* We keep the do_lstat code in a separate function to avoid recursion.
@@ -253,17 +292,38 @@ int mingw_utime (const char *file_name, const struct utimbuf *times)
int fh, rc;
/* must have write permission */
- if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0)
- return -1;
+ DWORD attrs = GetFileAttributes(file_name);
+ if (attrs != INVALID_FILE_ATTRIBUTES &&
+ (attrs & FILE_ATTRIBUTE_READONLY)) {
+ /* ignore errors here; open() will report them */
+ SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
+ }
+
+ if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
+ rc = -1;
+ goto revert_attrs;
+ }
- time_t_to_filetime(times->modtime, &mft);
- time_t_to_filetime(times->actime, &aft);
+ if (times) {
+ time_t_to_filetime(times->modtime, &mft);
+ time_t_to_filetime(times->actime, &aft);
+ } else {
+ GetSystemTimeAsFileTime(&mft);
+ aft = mft;
+ }
if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
errno = EINVAL;
rc = -1;
} else
rc = 0;
close(fh);
+
+revert_attrs:
+ if (attrs != INVALID_FILE_ATTRIBUTES &&
+ (attrs & FILE_ATTRIBUTE_READONLY)) {
+ /* ignore errors again */
+ SetFileAttributes(file_name, attrs);
+ }
return rc;
}
@@ -283,64 +343,37 @@ int mkstemp(char *template)
int gettimeofday(struct timeval *tv, void *tz)
{
- SYSTEMTIME st;
- struct tm tm;
- GetSystemTime(&st);
- tm.tm_year = st.wYear-1900;
- tm.tm_mon = st.wMonth-1;
- tm.tm_mday = st.wDay;
- tm.tm_hour = st.wHour;
- tm.tm_min = st.wMinute;
- tm.tm_sec = st.wSecond;
- tv->tv_sec = tm_to_time_t(&tm);
- if (tv->tv_sec < 0)
- return -1;
- tv->tv_usec = st.wMilliseconds*1000;
+ FILETIME ft;
+ long long hnsec;
+
+ GetSystemTimeAsFileTime(&ft);
+ hnsec = filetime_to_hnsec(&ft);
+ tv->tv_sec = hnsec / 10000000;
+ tv->tv_usec = (hnsec % 10000000) / 10;
return 0;
}
int pipe(int filedes[2])
{
- int fd;
- HANDLE h[2], parent;
+ HANDLE h[2];
- 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]);
+ /* this creates non-inheritable handles */
+ if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
+ errno = err_win_to_posix(GetLastError());
return -1;
}
- fd = _open_osfhandle((int)h[0], O_NOINHERIT);
- if (fd < 0) {
- close(filedes[0]);
- close(filedes[1]);
+ filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
+ if (filedes[0] < 0) {
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) {
+ filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
+ if (filedes[0] < 0) {
close(filedes[0]);
- close(filedes[1]);
CloseHandle(h[1]);
return -1;
}
- close(filedes[1]);
- filedes[1] = fd;
return 0;
}
@@ -613,7 +646,7 @@ static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_on
}
/*
- * Determines the absolute path of cmd using the the split path in path.
+ * Determines the absolute path of cmd using 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)
@@ -638,8 +671,9 @@ static int env_compare(const void *a, const void *b)
return strcasecmp(*ea, *eb);
}
-static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
- int prepend_cmd)
+static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
+ const char *dir,
+ int prepend_cmd, int fhin, int fhout, int fherr)
{
STARTUPINFO si;
PROCESS_INFORMATION pi;
@@ -675,9 +709,9 @@ static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
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);
+ si.hStdInput = (HANDLE) _get_osfhandle(fhin);
+ si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
+ si.hStdError = (HANDLE) _get_osfhandle(fherr);
/* concatenate argv, quoting args as we go */
strbuf_init(&args, 0);
@@ -718,7 +752,7 @@ static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
memset(&pi, 0, sizeof(pi));
ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
- env ? envblk.buf : NULL, NULL, &si, &pi);
+ env ? envblk.buf : NULL, dir, &si, &pi);
if (env)
strbuf_release(&envblk);
@@ -732,7 +766,15 @@ static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
return (pid_t)pi.hProcess;
}
-pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env)
+static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
+ int prepend_cmd)
+{
+ return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
+}
+
+pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
+ const char *dir,
+ int fhin, int fhout, int fherr)
{
pid_t pid;
char **path = get_path_split();
@@ -754,13 +796,15 @@ pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env)
pid = -1;
}
else {
- pid = mingw_spawnve(iprog, argv, env, 1);
+ pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
+ fhin, fhout, fherr);
free(iprog);
}
argv[0] = argv0;
}
else
- pid = mingw_spawnve(prog, argv, env, 0);
+ pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
+ fhin, fhout, fherr);
free(prog);
}
free_path_split(path);
@@ -1338,8 +1382,22 @@ static const char *make_backslash_path(const char *path)
void mingw_open_html(const char *unixpath)
{
const char *htmlpath = make_backslash_path(unixpath);
+ typedef HINSTANCE (WINAPI *T)(HWND, const char *,
+ const char *, const char *, const char *, INT);
+ T ShellExecute;
+ HMODULE shell32;
+
+ shell32 = LoadLibrary("shell32.dll");
+ if (!shell32)
+ die("cannot load shell32.dll");
+ ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
+ if (!ShellExecute)
+ die("cannot run browser");
+
printf("Launching default browser to display HTML ...\n");
ShellExecute(NULL, "open", htmlpath, NULL, "\\", 0);
+
+ FreeLibrary(shell32);
}
int link(const char *oldpath, const char *newpath)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-28 10:10:58 +0000