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git-commit-vandalism/compat/mingw.h
Karsten Blees fcd428f4a9 Win32: fix broken pipe detection 
As of "Win32: Thread-safe windows console output", git-log no longer
terminates when the pager process dies. This is due to disabling buffering
for the replaced stdout / stderr streams. Git-log will periodically fflush
stdout (see write_or_die.c/mayble_flush_or_die()), but with no buffering,
this is a NOP that always succeeds (so we never detect the EPIPE error).

Exchange the original console handles with our console thread pipe handles
by accessing the internal MSVCRT data structures directly (which are
exposed via __pioinfo for some reason).

Implement this with minimal assumptions about the actual data structure to
make it work with different (hopefully even future) MSVCRT versions.

While messing with internal data structures is ugly, this patch solves the
problem at the source instead of adding more workarounds. We no longer need
the special winansi_isatty override, and the limitations documented in
"Win32: Thread-safe windows console output" are gone (i.e. fdopen(1/2)
returns unbuffered streams now, and isatty() for duped console file
descriptors works as expected).

Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Stepan Kasal <kasal@ucw.cz>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-06-10 13:32:59 -07:00

483 lines
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#include <winsock2.h>
#include <ws2tcpip.h>
/*
* things that are not available in header files
*/
typedef int pid_t;
typedef int uid_t;
typedef int socklen_t;
#define hstrerror strerror
#define S_IFLNK 0120000 /* Symbolic link */
#define S_ISLNK(x) (((x) & S_IFMT) == S_IFLNK)
#define S_ISSOCK(x) 0
#define S_IRGRP 0
#define S_IWGRP 0
#define S_IXGRP 0
#define S_IRWXG (S_IRGRP | S_IWGRP | S_IXGRP)
#define S_IROTH 0
#define S_IWOTH 0
#define S_IXOTH 0
#define S_IRWXO (S_IROTH | S_IWOTH | S_IXOTH)
#define S_ISUID 0004000
#define S_ISGID 0002000
#define S_ISVTX 0001000
#define WIFEXITED(x) 1
#define WIFSIGNALED(x) 0
#define WEXITSTATUS(x) ((x) & 0xff)
#define WTERMSIG(x) SIGTERM
#ifndef EWOULDBLOCK
#define EWOULDBLOCK EAGAIN
#endif
#define SHUT_WR SD_SEND
#define SIGHUP 1
#define SIGQUIT 3
#define SIGKILL 9
#define SIGPIPE 13
#define SIGALRM 14
#define SIGCHLD 17
#define F_GETFD 1
#define F_SETFD 2
#define FD_CLOEXEC 0x1
#ifndef EAFNOSUPPORT
#define EAFNOSUPPORT WSAEAFNOSUPPORT
#endif
#ifndef ECONNABORTED
#define ECONNABORTED WSAECONNABORTED
#endif
struct passwd {
char *pw_name;
char *pw_gecos;
char *pw_dir;
};
typedef void (__cdecl *sig_handler_t)(int);
struct sigaction {
sig_handler_t sa_handler;
unsigned sa_flags;
};
#define sigemptyset(x) (void)0
#define SA_RESTART 0
struct itimerval {
struct timeval it_value, it_interval;
};
#define ITIMER_REAL 0
/*
* sanitize preprocessor namespace polluted by Windows headers defining
* macros which collide with git local versions
*/
#undef HELP_COMMAND /* from winuser.h */
/*
* trivial stubs
*/
static inline int readlink(const char *path, char *buf, size_t bufsiz)
{ errno = ENOSYS; return -1; }
static inline int symlink(const char *oldpath, const char *newpath)
{ errno = ENOSYS; return -1; }
static inline int fchmod(int fildes, mode_t mode)
{ errno = ENOSYS; return -1; }
static inline pid_t fork(void)
{ errno = ENOSYS; return -1; }
static inline unsigned int alarm(unsigned int seconds)
{ return 0; }
static inline int fsync(int fd)
{ return _commit(fd); }
static inline pid_t getppid(void)
{ return 1; }
static inline void sync(void)
{}
static inline uid_t getuid(void)
{ return 1; }
static inline struct passwd *getpwnam(const char *name)
{ return NULL; }
static inline int fcntl(int fd, int cmd, ...)
{
if (cmd == F_GETFD || cmd == F_SETFD)
return 0;
errno = EINVAL;
return -1;
}
/* bash cannot reliably detect negative return codes as failure */
#define exit(code) exit((code) & 0xff)
/*
* simple adaptors
*/
static inline int mingw_mkdir(const char *path, int mode)
{
return mkdir(path);
}
#define mkdir mingw_mkdir
#define WNOHANG 1
pid_t waitpid(pid_t pid, int *status, int options);
#define kill mingw_kill
int mingw_kill(pid_t pid, int sig);
#ifndef NO_OPENSSL
#include <openssl/ssl.h>
static inline int mingw_SSL_set_fd(SSL *ssl, int fd)
{
return SSL_set_fd(ssl, _get_osfhandle(fd));
}
#define SSL_set_fd mingw_SSL_set_fd
static inline int mingw_SSL_set_rfd(SSL *ssl, int fd)
{
return SSL_set_rfd(ssl, _get_osfhandle(fd));
}
#define SSL_set_rfd mingw_SSL_set_rfd
static inline int mingw_SSL_set_wfd(SSL *ssl, int fd)
{
return SSL_set_wfd(ssl, _get_osfhandle(fd));
}
#define SSL_set_wfd mingw_SSL_set_wfd
#endif
/*
* implementations of missing functions
*/
int pipe(int filedes[2]);
unsigned int sleep (unsigned int seconds);
int mkstemp(char *template);
int gettimeofday(struct timeval *tv, void *tz);
struct tm *gmtime_r(const time_t *timep, struct tm *result);
struct tm *localtime_r(const time_t *timep, struct tm *result);
int getpagesize(void); /* defined in MinGW's libgcc.a */
struct passwd *getpwuid(uid_t uid);
int setitimer(int type, struct itimerval *in, struct itimerval *out);
int sigaction(int sig, struct sigaction *in, struct sigaction *out);
int link(const char *oldpath, const char *newpath);
/*
* replacements of existing functions
*/
int mingw_unlink(const char *pathname);
#define unlink mingw_unlink
int mingw_rmdir(const char *path);
#define rmdir mingw_rmdir
int mingw_open (const char *filename, int oflags, ...);
#define open mingw_open
int mingw_fgetc(FILE *stream);
#define fgetc mingw_fgetc
FILE *mingw_fopen (const char *filename, const char *otype);
#define fopen mingw_fopen
FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream);
#define freopen mingw_freopen
int mingw_fflush(FILE *stream);
#define fflush mingw_fflush
char *mingw_getcwd(char *pointer, int len);
#define getcwd mingw_getcwd
char *mingw_getenv(const char *name);
#define getenv mingw_getenv
int mingw_gethostname(char *host, int namelen);
#define gethostname mingw_gethostname
struct hostent *mingw_gethostbyname(const char *host);
#define gethostbyname mingw_gethostbyname
void mingw_freeaddrinfo(struct addrinfo *res);
#define freeaddrinfo mingw_freeaddrinfo
int mingw_getaddrinfo(const char *node, const char *service,
const struct addrinfo *hints, struct addrinfo **res);
#define getaddrinfo mingw_getaddrinfo
int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
char *host, DWORD hostlen, char *serv, DWORD servlen,
int flags);
#define getnameinfo mingw_getnameinfo
int mingw_socket(int domain, int type, int protocol);
#define socket mingw_socket
int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz);
#define connect mingw_connect
int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz);
#define bind mingw_bind
int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen);
#define setsockopt mingw_setsockopt
int mingw_shutdown(int sockfd, int how);
#define shutdown mingw_shutdown
int mingw_listen(int sockfd, int backlog);
#define listen mingw_listen
int mingw_accept(int sockfd, struct sockaddr *sa, socklen_t *sz);
#define accept mingw_accept
int mingw_rename(const char*, const char*);
#define rename mingw_rename
#if defined(USE_WIN32_MMAP) || defined(_MSC_VER)
int mingw_getpagesize(void);
#define getpagesize mingw_getpagesize
#endif
struct rlimit {
unsigned int rlim_cur;
};
#define RLIMIT_NOFILE 0
static inline int getrlimit(int resource, struct rlimit *rlp)
{
if (resource != RLIMIT_NOFILE) {
errno = EINVAL;
return -1;
}
rlp->rlim_cur = 2048;
return 0;
}
/*
* Use mingw specific stat()/lstat()/fstat() implementations on Windows.
*/
#define off_t off64_t
#define lseek _lseeki64
/* use struct stat with 64 bit st_size */
#ifdef stat
#undef stat
#endif
#define stat _stati64
int mingw_lstat(const char *file_name, struct stat *buf);
int mingw_stat(const char *file_name, struct stat *buf);
int mingw_fstat(int fd, struct stat *buf);
#ifdef fstat
#undef fstat
#endif
#define fstat mingw_fstat
#ifdef lstat
#undef lstat
#endif
#define lstat mingw_lstat
#ifndef _stati64
# define _stati64(x,y) mingw_stat(x,y)
#elif defined (_USE_32BIT_TIME_T)
# define _stat32i64(x,y) mingw_stat(x,y)
#else
# define _stat64(x,y) mingw_stat(x,y)
#endif
int mingw_utime(const char *file_name, const struct utimbuf *times);
#define utime mingw_utime
pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
const char *dir,
int fhin, int fhout, int fherr);
int mingw_execvp(const char *cmd, char *const *argv);
#define execvp mingw_execvp
int mingw_execv(const char *cmd, char *const *argv);
#define execv mingw_execv
static inline unsigned int git_ntohl(unsigned int x)
{ return (unsigned int)ntohl(x); }
#define ntohl git_ntohl
sig_handler_t mingw_signal(int sig, sig_handler_t handler);
#define signal mingw_signal
int mingw_raise(int sig);
#define raise mingw_raise
/*
* ANSI emulation wrappers
*/
void winansi_init(void);
HANDLE winansi_get_osfhandle(int fd);
/*
* git specific compatibility
*/
#define has_dos_drive_prefix(path) (isalpha(*(path)) && (path)[1] == ':')
#define is_dir_sep(c) ((c) == '/' || (c) == '\\')
static inline char *mingw_find_last_dir_sep(const char *path)
{
char *ret = NULL;
for (; *path; ++path)
if (is_dir_sep(*path))
ret = (char *)path;
return ret;
}
#define find_last_dir_sep mingw_find_last_dir_sep
int mingw_offset_1st_component(const char *path);
#define offset_1st_component mingw_offset_1st_component
#define PATH_SEP ';'
#define PRIuMAX "I64u"
#define PRId64 "I64d"
void mingw_open_html(const char *path);
#define open_html mingw_open_html
/*
* helpers
*/
char **make_augmented_environ(const char *const *vars);
void free_environ(char **env);
/**
* Converts UTF-8 encoded string to UTF-16LE.
*
* To support repositories with legacy-encoded file names, invalid UTF-8 bytes
* 0xa0 - 0xff are converted to corresponding printable Unicode chars \u00a0 -
* \u00ff, and invalid UTF-8 bytes 0x80 - 0x9f (which would make non-printable
* Unicode) are converted to hex-code.
*
* Lead-bytes not followed by an appropriate number of trail-bytes, over-long
* encodings and 4-byte encodings > \u10ffff are detected as invalid UTF-8.
*
* Maximum space requirement for the target buffer is two wide chars per UTF-8
* char (((strlen(utf) * 2) + 1) [* sizeof(wchar_t)]).
*
* The maximum space is needed only if the entire input string consists of
* invalid UTF-8 bytes in range 0x80-0x9f, as per the following table:
*
* | | UTF-8 | UTF-16 |
* Code point | UTF-8 sequence | bytes | words | ratio
* --------------+-------------------+-------+--------+-------
* 000000-00007f | 0-7f | 1 | 1 | 1
* 000080-0007ff | c2-df + 80-bf | 2 | 1 | 0.5
* 000800-00ffff | e0-ef + 2 * 80-bf | 3 | 1 | 0.33
* 010000-10ffff | f0-f4 + 3 * 80-bf | 4 | 2 (a) | 0.5
* invalid | 80-9f | 1 | 2 (b) | 2
* invalid | a0-ff | 1 | 1 | 1
*
* (a) encoded as UTF-16 surrogate pair
* (b) encoded as two hex digits
*
* Note that, while the UTF-8 encoding scheme can be extended to 5-byte, 6-byte
* or even indefinite-byte sequences, the largest valid code point \u10ffff
* encodes as only 4 UTF-8 bytes.
*
* Parameters:
* wcs: wide char target buffer
* utf: string to convert
* wcslen: size of target buffer (in wchar_t's)
* utflen: size of string to convert, or -1 if 0-terminated
*
* Returns:
* length of converted string (_wcslen(wcs)), or -1 on failure
*
* Errors:
* EINVAL: one of the input parameters is invalid (e.g. NULL)
* ERANGE: the output buffer is too small
*/
int xutftowcsn(wchar_t *wcs, const char *utf, size_t wcslen, int utflen);
/**
* Simplified variant of xutftowcsn, assumes input string is \0-terminated.
*/
static inline int xutftowcs(wchar_t *wcs, const char *utf, size_t wcslen)
{
return xutftowcsn(wcs, utf, wcslen, -1);
}
/**
* Simplified file system specific variant of xutftowcsn, assumes output
* buffer size is MAX_PATH wide chars and input string is \0-terminated,
* fails with ENAMETOOLONG if input string is too long.
*/
static inline int xutftowcs_path(wchar_t *wcs, const char *utf)
{
int result = xutftowcsn(wcs, utf, MAX_PATH, -1);
if (result < 0 && errno == ERANGE)
errno = ENAMETOOLONG;
return result;
}
/**
* Converts UTF-16LE encoded string to UTF-8.
*
* Maximum space requirement for the target buffer is three UTF-8 chars per
* wide char ((_wcslen(wcs) * 3) + 1).
*
* The maximum space is needed only if the entire input string consists of
* UTF-16 words in range 0x0800-0xd7ff or 0xe000-0xffff (i.e. \u0800-\uffff
* modulo surrogate pairs), as per the following table:
*
* | | UTF-16 | UTF-8 |
* Code point | UTF-16 sequence | words | bytes | ratio
* --------------+-----------------------+--------+-------+-------
* 000000-00007f | 0000-007f | 1 | 1 | 1
* 000080-0007ff | 0080-07ff | 1 | 2 | 2
* 000800-00ffff | 0800-d7ff / e000-ffff | 1 | 3 | 3
* 010000-10ffff | d800-dbff + dc00-dfff | 2 | 4 | 2
*
* Note that invalid code points > 10ffff cannot be represented in UTF-16.
*
* Parameters:
* utf: target buffer
* wcs: wide string to convert
* utflen: size of target buffer
*
* Returns:
* length of converted string, or -1 on failure
*
* Errors:
* EINVAL: one of the input parameters is invalid (e.g. NULL)
* ERANGE: the output buffer is too small
*/
int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen);
/*
* A critical section used in the implementation of the spawn
* functions (mingw_spawnv[p]e()) and waitpid(). Intialised in
* the replacement main() macro below.
*/
extern CRITICAL_SECTION pinfo_cs;
/*
* A replacement of main() that adds win32 specific initialization.
*/
void mingw_startup();
#define main(c,v) dummy_decl_mingw_main(); \
static int mingw_main(c,v); \
int main(int argc, char **argv) \
{ \
mingw_startup(); \
return mingw_main(__argc, (void *)__argv); \
} \
static int mingw_main(c,v)
/*
* Used by Pthread API implementation for Windows
*/
extern int err_win_to_posix(DWORD winerr);
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