diff options
Diffstat (limited to 'tcl8.6/unix/tclUnixCompat.c')
| -rw-r--r-- | tcl8.6/unix/tclUnixCompat.c | 1022 |
1 files changed, 0 insertions, 1022 deletions
diff --git a/tcl8.6/unix/tclUnixCompat.c b/tcl8.6/unix/tclUnixCompat.c deleted file mode 100644 index 2a68f7f..0000000 --- a/tcl8.6/unix/tclUnixCompat.c +++ /dev/null @@ -1,1022 +0,0 @@ -/* - * tclUnixCompat.c - * - * Written by: Zoran Vasiljevic (vasiljevic@users.sourceforge.net). - * - * See the file "license.terms" for information on usage and redistribution of - * this file, and for a DISCLAIMER OF ALL WARRANTIES. - */ - -#include "tclInt.h" -#include <pwd.h> -#include <grp.h> -#include <errno.h> -#include <string.h> - -/* - * See also: SC_BLOCKING_STYLE in unix/tcl.m4 - */ - -#ifdef USE_FIONBIO -# ifdef HAVE_SYS_FILIO_H -# include <sys/filio.h> /* For FIONBIO. */ -# endif -# ifdef HAVE_SYS_IOCTL_H -# include <sys/ioctl.h> -# endif -#endif /* USE_FIONBIO */ - -/* - * Used to pad structures at size'd boundaries - * - * This macro assumes that the pointer 'buffer' was created from an aligned - * pointer by adding the 'length'. If this 'length' was not a multiple of the - * 'size' the result is unaligned and PadBuffer corrects both the pointer, - * _and_ the 'length'. The latter means that future increments of 'buffer' by - * 'length' stay aligned. - */ - -#define PadBuffer(buffer, length, size) \ - if (((length) % (size))) { \ - (buffer) += ((size) - ((length) % (size))); \ - (length) += ((size) - ((length) % (size))); \ - } - -/* - * Per-thread private storage used to store values returned from MT-unsafe - * library calls. - */ - -#ifdef TCL_THREADS - -typedef struct ThreadSpecificData { - struct passwd pwd; -#if defined(HAVE_GETPWNAM_R_5) || defined(HAVE_GETPWUID_R_5) -#define NEED_PW_CLEANER 1 - char *pbuf; - int pbuflen; -#else - char pbuf[2048]; -#endif - - struct group grp; -#if defined(HAVE_GETGRNAM_R_5) || defined(HAVE_GETGRGID_R_5) -#define NEED_GR_CLEANER 1 - char *gbuf; - int gbuflen; -#else - char gbuf[2048]; -#endif - -#if !defined(HAVE_MTSAFE_GETHOSTBYNAME) || !defined(HAVE_MTSAFE_GETHOSTBYADDR) - struct hostent hent; - char hbuf[2048]; -#endif -} ThreadSpecificData; -static Tcl_ThreadDataKey dataKey; - -#if ((!defined(HAVE_GETHOSTBYNAME_R) || !defined(HAVE_GETHOSTBYADDR_R)) && \ - (!defined(HAVE_MTSAFE_GETHOSTBYNAME) || \ - !defined(HAVE_MTSAFE_GETHOSTBYADDR))) || \ - !defined(HAVE_GETPWNAM_R) || !defined(HAVE_GETPWUID_R) || \ - !defined(HAVE_GETGRNAM_R) || !defined(HAVE_GETGRGID_R) -/* - * Mutex to lock access to MT-unsafe calls. This is just to protect our own - * usage. It does not protect us from others calling the same functions - * without (or using some different) lock. - */ - -static Tcl_Mutex compatLock; - -/* - * Helper function declarations. Note that these are only used if needed and - * only defined if used (via the NEED_* macros). - */ - -#undef NEED_COPYARRAY -#undef NEED_COPYGRP -#undef NEED_COPYHOSTENT -#undef NEED_COPYPWD -#undef NEED_COPYSTRING - -#if !defined(HAVE_GETGRNAM_R_5) && !defined(HAVE_GETGRNAM_R_4) -#define NEED_COPYGRP 1 -static int CopyGrp(struct group *tgtPtr, char *buf, int buflen); -#endif - -#if !defined(HAVE_GETPWNAM_R_5) && !defined(HAVE_GETPWNAM_R_4) -#define NEED_COPYPWD 1 -static int CopyPwd(struct passwd *tgtPtr, char *buf, int buflen); -#endif - -static int CopyArray(char **src, int elsize, char *buf, - int buflen); -static int CopyHostent(struct hostent *tgtPtr, char *buf, - int buflen); -static int CopyString(const char *src, char *buf, int buflen); - -#endif - -#ifdef NEED_PW_CLEANER -static void FreePwBuf(ClientData ignored); -#endif -#ifdef NEED_GR_CLEANER -static void FreeGrBuf(ClientData ignored); -#endif -#endif /* TCL_THREADS */ - -/* - *--------------------------------------------------------------------------- - * - * TclUnixSetBlockingMode -- - * - * Set the blocking mode of a file descriptor. - * - * Results: - * - * 0 on success, -1 (with errno set) on error. - * - *--------------------------------------------------------------------------- - */ - -int -TclUnixSetBlockingMode( - int fd, /* File descriptor */ - int mode) /* Either TCL_MODE_BLOCKING or - * TCL_MODE_NONBLOCKING. */ -{ -#ifndef USE_FIONBIO - int flags = fcntl(fd, F_GETFL); - - if (mode == TCL_MODE_BLOCKING) { - flags &= ~O_NONBLOCK; - } else { - flags |= O_NONBLOCK; - } - return fcntl(fd, F_SETFL, flags); -#else /* USE_FIONBIO */ - int state = (mode == TCL_MODE_NONBLOCKING); - - return ioctl(fd, FIONBIO, &state); -#endif /* !USE_FIONBIO */ -} - -/* - *--------------------------------------------------------------------------- - * - * TclpGetPwNam -- - * - * Thread-safe wrappers for getpwnam(). See "man getpwnam" for more - * details. - * - * Results: - * Pointer to struct passwd on success or NULL on error. - * - * Side effects: - * None. - * - *--------------------------------------------------------------------------- - */ - -struct passwd * -TclpGetPwNam( - const char *name) -{ -#if !defined(TCL_THREADS) - return getpwnam(name); -#else - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - -#if defined(HAVE_GETPWNAM_R_5) - struct passwd *pwPtr = NULL; - - /* - * How to allocate a buffer of the right initial size. If you want the - * gory detail, see http://www.opengroup.org/austin/docs/austin_328.txt - * and weep. - */ - - if (tsdPtr->pbuf == NULL) { - tsdPtr->pbuflen = (int) sysconf(_SC_GETPW_R_SIZE_MAX); - if (tsdPtr->pbuflen < 1) { - tsdPtr->pbuflen = 1024; - } - tsdPtr->pbuf = ckalloc(tsdPtr->pbuflen); - Tcl_CreateThreadExitHandler(FreePwBuf, NULL); - } - while (1) { - int e = getpwnam_r(name, &tsdPtr->pwd, tsdPtr->pbuf, tsdPtr->pbuflen, - &pwPtr); - - if (e == 0) { - break; - } else if (e != ERANGE) { - return NULL; - } - tsdPtr->pbuflen *= 2; - tsdPtr->pbuf = ckrealloc(tsdPtr->pbuf, tsdPtr->pbuflen); - } - return (pwPtr != NULL ? &tsdPtr->pwd : NULL); - -#elif defined(HAVE_GETPWNAM_R_4) - return getpwnam_r(name, &tsdPtr->pwd, tsdPtr->pbuf, sizeof(tsdPtr->pbuf)); - -#else - struct passwd *pwPtr; - - Tcl_MutexLock(&compatLock); - pwPtr = getpwnam(name); - if (pwPtr != NULL) { - tsdPtr->pwd = *pwPtr; - pwPtr = &tsdPtr->pwd; - if (CopyPwd(&tsdPtr->pwd, tsdPtr->pbuf, sizeof(tsdPtr->pbuf)) == -1) { - pwPtr = NULL; - } - } - Tcl_MutexUnlock(&compatLock); - return pwPtr; -#endif - - return NULL; /* Not reached. */ -#endif /* TCL_THREADS */ -} - -/* - *--------------------------------------------------------------------------- - * - * TclpGetPwUid -- - * - * Thread-safe wrappers for getpwuid(). See "man getpwuid" for more - * details. - * - * Results: - * Pointer to struct passwd on success or NULL on error. - * - * Side effects: - * None. - * - *--------------------------------------------------------------------------- - */ - -struct passwd * -TclpGetPwUid( - uid_t uid) -{ -#if !defined(TCL_THREADS) - return getpwuid(uid); -#else - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - -#if defined(HAVE_GETPWUID_R_5) - struct passwd *pwPtr = NULL; - - /* - * How to allocate a buffer of the right initial size. If you want the - * gory detail, see http://www.opengroup.org/austin/docs/austin_328.txt - * and weep. - */ - - if (tsdPtr->pbuf == NULL) { - tsdPtr->pbuflen = (int) sysconf(_SC_GETPW_R_SIZE_MAX); - if (tsdPtr->pbuflen < 1) { - tsdPtr->pbuflen = 1024; - } - tsdPtr->pbuf = ckalloc(tsdPtr->pbuflen); - Tcl_CreateThreadExitHandler(FreePwBuf, NULL); - } - while (1) { - int e = getpwuid_r(uid, &tsdPtr->pwd, tsdPtr->pbuf, tsdPtr->pbuflen, - &pwPtr); - - if (e == 0) { - break; - } else if (e != ERANGE) { - return NULL; - } - tsdPtr->pbuflen *= 2; - tsdPtr->pbuf = ckrealloc(tsdPtr->pbuf, tsdPtr->pbuflen); - } - return (pwPtr != NULL ? &tsdPtr->pwd : NULL); - -#elif defined(HAVE_GETPWUID_R_4) - return getpwuid_r(uid, &tsdPtr->pwd, tsdPtr->pbuf, sizeof(tsdPtr->pbuf)); - -#else - struct passwd *pwPtr; - - Tcl_MutexLock(&compatLock); - pwPtr = getpwuid(uid); - if (pwPtr != NULL) { - tsdPtr->pwd = *pwPtr; - pwPtr = &tsdPtr->pwd; - if (CopyPwd(&tsdPtr->pwd, tsdPtr->pbuf, sizeof(tsdPtr->pbuf)) == -1) { - pwPtr = NULL; - } - } - Tcl_MutexUnlock(&compatLock); - return pwPtr; -#endif - - return NULL; /* Not reached. */ -#endif /* TCL_THREADS */ -} - -/* - *--------------------------------------------------------------------------- - * - * FreePwBuf -- - * - * Helper that is used to dispose of space allocated and referenced from - * the ThreadSpecificData for user entries. (Darn that baroque POSIX - * reentrant interface.) - * - *--------------------------------------------------------------------------- - */ - -#ifdef NEED_PW_CLEANER -static void -FreePwBuf( - ClientData ignored) -{ - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - ckfree(tsdPtr->pbuf); -} -#endif /* NEED_PW_CLEANER */ - -/* - *--------------------------------------------------------------------------- - * - * TclpGetGrNam -- - * - * Thread-safe wrappers for getgrnam(). See "man getgrnam" for more - * details. - * - * Results: - * Pointer to struct group on success or NULL on error. - * - * Side effects: - * None. - * - *--------------------------------------------------------------------------- - */ - -struct group * -TclpGetGrNam( - const char *name) -{ -#if !defined(TCL_THREADS) - return getgrnam(name); -#else - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - -#if defined(HAVE_GETGRNAM_R_5) - struct group *grPtr = NULL; - - /* - * How to allocate a buffer of the right initial size. If you want the - * gory detail, see http://www.opengroup.org/austin/docs/austin_328.txt - * and weep. - */ - - if (tsdPtr->gbuf == NULL) { - tsdPtr->gbuflen = (int) sysconf(_SC_GETGR_R_SIZE_MAX); - if (tsdPtr->gbuflen < 1) { - tsdPtr->gbuflen = 1024; - } - tsdPtr->gbuf = ckalloc(tsdPtr->gbuflen); - Tcl_CreateThreadExitHandler(FreeGrBuf, NULL); - } - while (1) { - int e = getgrnam_r(name, &tsdPtr->grp, tsdPtr->gbuf, tsdPtr->gbuflen, - &grPtr); - - if (e == 0) { - break; - } else if (e != ERANGE) { - return NULL; - } - tsdPtr->gbuflen *= 2; - tsdPtr->gbuf = ckrealloc(tsdPtr->gbuf, tsdPtr->gbuflen); - } - return (grPtr != NULL ? &tsdPtr->grp : NULL); - -#elif defined(HAVE_GETGRNAM_R_4) - return getgrnam_r(name, &tsdPtr->grp, tsdPtr->gbuf, sizeof(tsdPtr->gbuf)); - -#else - struct group *grPtr; - - Tcl_MutexLock(&compatLock); - grPtr = getgrnam(name); - if (grPtr != NULL) { - tsdPtr->grp = *grPtr; - grPtr = &tsdPtr->grp; - if (CopyGrp(&tsdPtr->grp, tsdPtr->gbuf, sizeof(tsdPtr->gbuf)) == -1) { - grPtr = NULL; - } - } - Tcl_MutexUnlock(&compatLock); - return grPtr; -#endif - - return NULL; /* Not reached. */ -#endif /* TCL_THREADS */ -} - -/* - *--------------------------------------------------------------------------- - * - * TclpGetGrGid -- - * - * Thread-safe wrappers for getgrgid(). See "man getgrgid" for more - * details. - * - * Results: - * Pointer to struct group on success or NULL on error. - * - * Side effects: - * None. - * - *--------------------------------------------------------------------------- - */ - -struct group * -TclpGetGrGid( - gid_t gid) -{ -#if !defined(TCL_THREADS) - return getgrgid(gid); -#else - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - -#if defined(HAVE_GETGRGID_R_5) - struct group *grPtr = NULL; - - /* - * How to allocate a buffer of the right initial size. If you want the - * gory detail, see http://www.opengroup.org/austin/docs/austin_328.txt - * and weep. - */ - - if (tsdPtr->gbuf == NULL) { - tsdPtr->gbuflen = (int) sysconf(_SC_GETGR_R_SIZE_MAX); - if (tsdPtr->gbuflen < 1) { - tsdPtr->gbuflen = 1024; - } - tsdPtr->gbuf = ckalloc(tsdPtr->gbuflen); - Tcl_CreateThreadExitHandler(FreeGrBuf, NULL); - } - while (1) { - int e = getgrgid_r(gid, &tsdPtr->grp, tsdPtr->gbuf, tsdPtr->gbuflen, - &grPtr); - - if (e == 0) { - break; - } else if (e != ERANGE) { - return NULL; - } - tsdPtr->gbuflen *= 2; - tsdPtr->gbuf = ckrealloc(tsdPtr->gbuf, tsdPtr->gbuflen); - } - return (grPtr != NULL ? &tsdPtr->grp : NULL); - -#elif defined(HAVE_GETGRGID_R_4) - return getgrgid_r(gid, &tsdPtr->grp, tsdPtr->gbuf, sizeof(tsdPtr->gbuf)); - -#else - struct group *grPtr; - - Tcl_MutexLock(&compatLock); - grPtr = getgrgid(gid); - if (grPtr != NULL) { - tsdPtr->grp = *grPtr; - grPtr = &tsdPtr->grp; - if (CopyGrp(&tsdPtr->grp, tsdPtr->gbuf, sizeof(tsdPtr->gbuf)) == -1) { - grPtr = NULL; - } - } - Tcl_MutexUnlock(&compatLock); - return grPtr; -#endif - - return NULL; /* Not reached. */ -#endif /* TCL_THREADS */ -} - -/* - *--------------------------------------------------------------------------- - * - * FreeGrBuf -- - * - * Helper that is used to dispose of space allocated and referenced from - * the ThreadSpecificData for group entries. (Darn that baroque POSIX - * reentrant interface.) - * - *--------------------------------------------------------------------------- - */ - -#ifdef NEED_GR_CLEANER -static void -FreeGrBuf( - ClientData ignored) -{ - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - ckfree(tsdPtr->gbuf); -} -#endif /* NEED_GR_CLEANER */ - -/* - *--------------------------------------------------------------------------- - * - * TclpGetHostByName -- - * - * Thread-safe wrappers for gethostbyname(). See "man gethostbyname" for - * more details. - * - * Results: - * Pointer to struct hostent on success or NULL on error. - * - * Side effects: - * None. - * - *--------------------------------------------------------------------------- - */ - -struct hostent * -TclpGetHostByName( - const char *name) -{ -#if !defined(TCL_THREADS) || defined(HAVE_MTSAFE_GETHOSTBYNAME) - return gethostbyname(name); -#else - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - -#if defined(HAVE_GETHOSTBYNAME_R_5) - int h_errno; - - return gethostbyname_r(name, &tsdPtr->hent, tsdPtr->hbuf, - sizeof(tsdPtr->hbuf), &h_errno); - -#elif defined(HAVE_GETHOSTBYNAME_R_6) - struct hostent *hePtr = NULL; - int h_errno, result; - - result = gethostbyname_r(name, &tsdPtr->hent, tsdPtr->hbuf, - sizeof(tsdPtr->hbuf), &hePtr, &h_errno); - return (result == 0) ? hePtr : NULL; - -#elif defined(HAVE_GETHOSTBYNAME_R_3) - struct hostent_data data; - - return (gethostbyname_r(name, &tsdPtr->hent, &data) == 0) - ? &tsdPtr->hent : NULL; - -#else -#define NEED_COPYHOSTENT 1 - struct hostent *hePtr; - - Tcl_MutexLock(&compatLock); - hePtr = gethostbyname(name); - if (hePtr != NULL) { - tsdPtr->hent = *hePtr; - hePtr = &tsdPtr->hent; - if (CopyHostent(&tsdPtr->hent, tsdPtr->hbuf, - sizeof(tsdPtr->hbuf)) == -1) { - hePtr = NULL; - } - } - Tcl_MutexUnlock(&compatLock); - return hePtr; -#endif - - return NULL; /* Not reached. */ -#endif /* TCL_THREADS */ -} - -/* - *--------------------------------------------------------------------------- - * - * TclpGetHostByAddr -- - * - * Thread-safe wrappers for gethostbyaddr(). See "man gethostbyaddr" for - * more details. - * - * Results: - * Pointer to struct hostent on success or NULL on error. - * - * Side effects: - * None. - * - *--------------------------------------------------------------------------- - */ - -struct hostent * -TclpGetHostByAddr( - const char *addr, - int length, - int type) -{ -#if !defined(TCL_THREADS) || defined(HAVE_MTSAFE_GETHOSTBYADDR) - return gethostbyaddr(addr, length, type); -#else - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - -#if defined(HAVE_GETHOSTBYADDR_R_7) - int h_errno; - - return gethostbyaddr_r(addr, length, type, &tsdPtr->hent, tsdPtr->hbuf, - sizeof(tsdPtr->hbuf), &h_errno); - -#elif defined(HAVE_GETHOSTBYADDR_R_8) - struct hostent *hePtr; - int h_errno; - - return (gethostbyaddr_r(addr, length, type, &tsdPtr->hent, tsdPtr->hbuf, - sizeof(tsdPtr->hbuf), &hePtr, &h_errno) == 0) - ? &tsdPtr->hent : NULL; -#else -#define NEED_COPYHOSTENT 1 - struct hostent *hePtr; - - Tcl_MutexLock(&compatLock); - hePtr = gethostbyaddr(addr, length, type); - if (hePtr != NULL) { - tsdPtr->hent = *hePtr; - hePtr = &tsdPtr->hent; - if (CopyHostent(&tsdPtr->hent, tsdPtr->hbuf, - sizeof(tsdPtr->hbuf)) == -1) { - hePtr = NULL; - } - } - Tcl_MutexUnlock(&compatLock); - return hePtr; -#endif - - return NULL; /* Not reached. */ -#endif /* TCL_THREADS */ -} - -/* - *--------------------------------------------------------------------------- - * - * CopyGrp -- - * - * Copies string fields of the group structure to the private buffer, - * honouring the size of the buffer. - * - * Results: - * 0 on success or -1 on error (errno = ERANGE). - * - * Side effects: - * None. - * - *--------------------------------------------------------------------------- - */ - -#ifdef NEED_COPYGRP -#define NEED_COPYARRAY 1 -#define NEED_COPYSTRING 1 - -static int -CopyGrp( - struct group *tgtPtr, - char *buf, - int buflen) -{ - register char *p = buf; - register int copied, len = 0; - - /* - * Copy username. - */ - - copied = CopyString(tgtPtr->gr_name, p, buflen - len); - if (copied == -1) { - goto range; - } - tgtPtr->gr_name = (copied > 0) ? p : NULL; - len += copied; - p = buf + len; - - /* - * Copy password. - */ - - copied = CopyString(tgtPtr->gr_passwd, p, buflen - len); - if (copied == -1) { - goto range; - } - tgtPtr->gr_passwd = (copied > 0) ? p : NULL; - len += copied; - p = buf + len; - - /* - * Copy group members. - */ - - PadBuffer(p, len, sizeof(char *)); - copied = CopyArray((char **)tgtPtr->gr_mem, -1, p, buflen - len); - if (copied == -1) { - goto range; - } - tgtPtr->gr_mem = (copied > 0) ? (char **)p : NULL; - - return 0; - - range: - errno = ERANGE; - return -1; -} -#endif /* NEED_COPYGRP */ - -/* - *--------------------------------------------------------------------------- - * - * CopyHostent -- - * - * Copies string fields of the hostnent structure to the private buffer, - * honouring the size of the buffer. - * - * Results: - * Number of bytes copied on success or -1 on error (errno = ERANGE) - * - * Side effects: - * None - * - *--------------------------------------------------------------------------- - */ - -#ifdef NEED_COPYHOSTENT -#define NEED_COPYSTRING 1 -#define NEED_COPYARRAY 1 - -static int -CopyHostent( - struct hostent *tgtPtr, - char *buf, - int buflen) -{ - char *p = buf; - int copied, len = 0; - - copied = CopyString(tgtPtr->h_name, p, buflen - len); - if (copied == -1) { - goto range; - } - tgtPtr->h_name = (copied > 0) ? p : NULL; - len += copied; - p = buf + len; - - PadBuffer(p, len, sizeof(char *)); - copied = CopyArray(tgtPtr->h_aliases, -1, p, buflen - len); - if (copied == -1) { - goto range; - } - tgtPtr->h_aliases = (copied > 0) ? (char **)p : NULL; - len += copied; - p += len; - - PadBuffer(p, len, sizeof(char *)); - copied = CopyArray(tgtPtr->h_addr_list, tgtPtr->h_length, p, buflen-len); - if (copied == -1) { - goto range; - } - tgtPtr->h_addr_list = (copied > 0) ? (char **)p : NULL; - - return 0; - - range: - errno = ERANGE; - return -1; -} -#endif /* NEED_COPYHOSTENT */ - -/* - *--------------------------------------------------------------------------- - * - * CopyPwd -- - * - * Copies string fields of the passwd structure to the private buffer, - * honouring the size of the buffer. - * - * Results: - * 0 on success or -1 on error (errno = ERANGE). - * - * Side effects: - * We are not copying the gecos field as it may not be supported on all - * platforms. - * - *--------------------------------------------------------------------------- - */ - -#ifdef NEED_COPYPWD -#define NEED_COPYSTRING 1 - -static int -CopyPwd( - struct passwd *tgtPtr, - char *buf, - int buflen) -{ - char *p = buf; - int copied, len = 0; - - copied = CopyString(tgtPtr->pw_name, p, buflen - len); - if (copied == -1) { - range: - errno = ERANGE; - return -1; - } - tgtPtr->pw_name = (copied > 0) ? p : NULL; - len += copied; - p = buf + len; - - copied = CopyString(tgtPtr->pw_passwd, p, buflen - len); - if (copied == -1) { - goto range; - } - tgtPtr->pw_passwd = (copied > 0) ? p : NULL; - len += copied; - p = buf + len; - - copied = CopyString(tgtPtr->pw_dir, p, buflen - len); - if (copied == -1) { - goto range; - } - tgtPtr->pw_dir = (copied > 0) ? p : NULL; - len += copied; - p = buf + len; - - copied = CopyString(tgtPtr->pw_shell, p, buflen - len); - if (copied == -1) { - goto range; - } - tgtPtr->pw_shell = (copied > 0) ? p : NULL; - - return 0; -} -#endif /* NEED_COPYPWD */ - -/* - *--------------------------------------------------------------------------- - * - * CopyArray -- - * - * Copies array of NULL-terminated or fixed-length strings to the private - * buffer, honouring the size of the buffer. - * - * Results: - * Number of bytes copied on success or -1 on error (errno = ERANGE) - * - * Side effects: - * None. - * - *--------------------------------------------------------------------------- - */ - -#ifdef NEED_COPYARRAY -static int -CopyArray( - char **src, /* Array of elements to copy. */ - int elsize, /* Size of each element, or -1 to indicate - * that they are C strings of dynamic - * length. */ - char *buf, /* Buffer to copy into. */ - int buflen) /* Size of buffer. */ -{ - int i, j, len = 0; - char *p, **new; - - if (src == NULL) { - return 0; - } - - for (i = 0; src[i] != NULL; i++) { - /* - * Empty loop to count how many. - */ - } - len = sizeof(char *) * (i + 1); /* Leave place for the array. */ - if (len > buflen) { - return -1; - } - - new = (char **) buf; - p = buf + len; - - for (j = 0; j < i; j++) { - int sz = (elsize<0 ? (int) strlen(src[j]) + 1 : elsize); - - len += sz; - if (len > buflen) { - return -1; - } - memcpy(p, src[j], sz); - new[j] = p; - p = buf + len; - } - new[j] = NULL; - - return len; -} -#endif /* NEED_COPYARRAY */ - -/* - *--------------------------------------------------------------------------- - * - * CopyString -- - * - * Copies a NULL-terminated string to the private buffer, honouring the - * size of the buffer - * - * Results: - * 0 success or -1 on error (errno = ERANGE) - * - * Side effects: - * None - * - *--------------------------------------------------------------------------- - */ - -#ifdef NEED_COPYSTRING -static int -CopyString( - const char *src, /* String to copy. */ - char *buf, /* Buffer to copy into. */ - int buflen) /* Size of buffer. */ -{ - int len = 0; - - if (src != NULL) { - len = strlen(src) + 1; - if (len > buflen) { - return -1; - } - memcpy(buf, src, len); - } - - return len; -} -#endif /* NEED_COPYSTRING */ - -/* - * Local Variables: - * mode: c - * c-basic-offset: 4 - * fill-column: 78 - * End: - */ - -/* - *------------------------------------------------------------------------ - * - * TclWinCPUID -- - * - * Get CPU ID information on an Intel box under UNIX (either Linux or Cygwin) - * - * Results: - * Returns TCL_OK if successful, TCL_ERROR if CPUID is not supported. - * - * Side effects: - * If successful, stores EAX, EBX, ECX and EDX registers after the CPUID - * instruction in the four integers designated by 'regsPtr' - * - *---------------------------------------------------------------------- - */ - -int -TclWinCPUID( - unsigned int index, /* Which CPUID value to retrieve. */ - unsigned int *regsPtr) /* Registers after the CPUID. */ -{ - int status = TCL_ERROR; - - /* See: <http://en.wikipedia.org/wiki/CPUID> */ -#if defined(HAVE_CPUID) -#if defined(__x86_64__) || defined(_M_AMD64) || defined (_M_X64) - __asm__ __volatile__("movq %%rbx, %%rsi \n\t" /* save %rbx */ - "cpuid \n\t" - "xchgq %%rsi, %%rbx \n\t" /* restore the old %rbx */ - : "=a"(regsPtr[0]), "=S"(regsPtr[1]), "=c"(regsPtr[2]), "=d"(regsPtr[3]) - : "a"(index)); -#else - __asm__ __volatile__("mov %%ebx, %%esi \n\t" /* save %ebx */ - "cpuid \n\t" - "xchg %%esi, %%ebx \n\t" /* restore the old %ebx */ - : "=a"(regsPtr[0]), "=S"(regsPtr[1]), "=c"(regsPtr[2]), "=d"(regsPtr[3]) - : "a"(index)); -#endif - status = TCL_OK; -#endif - return status; -} - -/* - * Local Variables: - * mode: c - * c-basic-offset: 4 - * fill-column: 78 - * End: - */ |