diff options
Diffstat (limited to 'pr/src/io/prfile.c')
| -rw-r--r-- | pr/src/io/prfile.c | 554 |
1 files changed, 554 insertions, 0 deletions
diff --git a/pr/src/io/prfile.c b/pr/src/io/prfile.c new file mode 100644 index 00000000..ab20b2a3 --- /dev/null +++ b/pr/src/io/prfile.c @@ -0,0 +1,554 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* + * The contents of this file are subject to the Netscape Public License + * Version 1.0 (the "NPL"); you may not use this file except in + * compliance with the NPL. You may obtain a copy of the NPL at + * http://www.mozilla.org/NPL/ + * + * Software distributed under the NPL is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL + * for the specific language governing rights and limitations under the + * NPL. + * + * The Initial Developer of this code under the NPL is Netscape + * Communications Corporation. Portions created by Netscape are + * Copyright (C) 1998 Netscape Communications Corporation. All Rights + * Reserved. + */ + +#include "primpl.h" + +#include <string.h> +#include <fcntl.h> + +#ifdef XP_UNIX +#ifdef AIX +/* To pick up sysconf */ +#include <unistd.h> +#else +/* To pick up getrlimit, setrlimit */ +#include <sys/time.h> +#include <sys/resource.h> +#endif +#endif /* XP_UNIX */ + +extern PRLock *_pr_flock_lock; + +static PRInt32 PR_CALLBACK FileRead(PRFileDesc *fd, void *buf, PRInt32 amount) +{ + PRInt32 rv = 0; + PRThread *me = _PR_MD_CURRENT_THREAD(); + + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + rv = -1; + } + if (_PR_IO_PENDING(me)) { + PR_SetError(PR_IO_PENDING_ERROR, 0); + rv = -1; + } + if (rv == -1) + return rv; + + rv = _PR_MD_READ(fd, buf, amount); + if (rv < 0) { + PR_ASSERT(rv == -1); + } + PR_LOG(_pr_io_lm, PR_LOG_MAX, ("read -> %d", rv)); + return rv; +} + +static PRInt32 PR_CALLBACK FileWrite(PRFileDesc *fd, const void *buf, PRInt32 amount) +{ + PRInt32 rv = 0; + PRInt32 temp, count; + PRThread *me = _PR_MD_CURRENT_THREAD(); + + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + rv = -1; + } + if (_PR_IO_PENDING(me)) { + PR_SetError(PR_IO_PENDING_ERROR, 0); + rv = -1; + } + if (rv != 0) + return rv; + + count = 0; + while (amount > 0) { + temp = _PR_MD_WRITE(fd, buf, amount); + if (temp < 0) { + count = -1; + break; + } + count += temp; + if (fd->secret->nonblocking) { + break; + } + buf = (const void*) ((const char*)buf + temp); + amount -= temp; + } + PR_LOG(_pr_io_lm, PR_LOG_MAX, ("write -> %d", count)); + return count; +} + +static PRInt32 PR_CALLBACK FileSeek(PRFileDesc *fd, PRInt32 offset, PRSeekWhence whence) +{ + PRInt32 result; + + result = _PR_MD_LSEEK(fd, offset, whence); + return result; +} + +static PRInt64 PR_CALLBACK FileSeek64(PRFileDesc *fd, PRInt64 offset, PRSeekWhence whence) +{ + PRInt64 result; + + result = _PR_MD_LSEEK64(fd, offset, whence); + return result; +} + +static PRInt32 PR_CALLBACK FileAvailable(PRFileDesc *fd) +{ + PRInt32 result, cur, end; + + cur = _PR_MD_LSEEK(fd, 0, PR_SEEK_CUR); + + if (cur >= 0) + end = _PR_MD_LSEEK(fd, 0, PR_SEEK_END); + + if ((cur < 0) || (end < 0)) { + return -1; + } + + result = end - cur; + _PR_MD_LSEEK(fd, cur, PR_SEEK_SET); + + return result; +} + +static PRInt64 PR_CALLBACK FileAvailable64(PRFileDesc *fd) +{ + PRInt64 result, cur, end; + PRInt64 minus_one; + + LL_I2L(minus_one, -1); + cur = _PR_MD_LSEEK64(fd, LL_ZERO, PR_SEEK_CUR); + + if (LL_GE_ZERO(cur)) + end = _PR_MD_LSEEK64(fd, LL_ZERO, PR_SEEK_END); + + if (!LL_GE_ZERO(cur) || !LL_GE_ZERO(end)) return minus_one; + + LL_SUB(result, end, cur); + (void)_PR_MD_LSEEK64(fd, cur, PR_SEEK_SET); + + return result; +} + +static PRStatus PR_CALLBACK FileInfo(PRFileDesc *fd, PRFileInfo *info) +{ + PRInt32 rv; + + rv = _PR_MD_GETOPENFILEINFO(fd, info); + if (rv < 0) { + return PR_FAILURE; + } else + return PR_SUCCESS; +} + +static PRStatus PR_CALLBACK FileInfo64(PRFileDesc *fd, PRFileInfo64 *info) +{ + /* $$$$ NOT YET IMPLEMENTED */ + PRInt32 rv; + + rv = _PR_MD_GETOPENFILEINFO64(fd, info); + if (rv < 0) return PR_FAILURE; + else return PR_SUCCESS; +} + +static PRStatus PR_CALLBACK FileSync(PRFileDesc *fd) +{ + PRInt32 result; + result = _PR_MD_FSYNC(fd); + if (result < 0) { + return PR_FAILURE; + } + return PR_SUCCESS; +} + +static PRStatus PR_CALLBACK FileClose(PRFileDesc *fd) +{ + PRInt32 rv; + + if (!fd || fd->secret->state != _PR_FILEDESC_OPEN) { + PR_SetError(PR_BAD_DESCRIPTOR_ERROR, 0); + return PR_FAILURE; + } + + fd->secret->state = _PR_FILEDESC_CLOSED; + + rv = _PR_MD_CLOSE_FILE(fd->secret->md.osfd); + PR_FreeFileDesc(fd); + if (rv < 0) { + return PR_FAILURE; + } else { + return PR_SUCCESS; + } +} + +PRIOMethods _pr_fileMethods = { + PR_DESC_FILE, + FileClose, + FileRead, + FileWrite, + FileAvailable, + FileAvailable64, + FileSync, + FileSeek, + FileSeek64, + FileInfo, + FileInfo64, + (PRWritevFN)_PR_InvalidInt, + (PRConnectFN)_PR_InvalidStatus, + (PRAcceptFN)_PR_InvalidDesc, + (PRBindFN)_PR_InvalidStatus, + (PRListenFN)_PR_InvalidStatus, + (PRShutdownFN)_PR_InvalidStatus, + (PRRecvFN)_PR_InvalidInt, + (PRSendFN)_PR_InvalidInt, + (PRRecvfromFN)_PR_InvalidInt, + (PRSendtoFN)_PR_InvalidInt, + (PRPollFN)0, + (PRAcceptreadFN)_PR_InvalidInt, + (PRTransmitfileFN)_PR_InvalidInt, + (PRGetsocknameFN)_PR_InvalidStatus, + (PRGetpeernameFN)_PR_InvalidStatus, + (PRGetsockoptFN)_PR_InvalidStatus, + (PRSetsockoptFN)_PR_InvalidStatus, + (PRGetsocketoptionFN)_PR_InvalidStatus, + (PRSetsocketoptionFN)_PR_InvalidStatus, +}; + +PR_IMPLEMENT(PRIOMethods*) PR_GetFileMethods(void) +{ + return &_pr_fileMethods; +} + +PR_IMPLEMENT(PRFileDesc*) PR_Open(const char *name, PRIntn flags, PRIntn mode) +{ + PRInt32 osfd; + PRFileDesc *fd = 0; + + if (!_pr_initialized) _PR_ImplicitInitialization(); + + /* Map pr open flags and mode to os specific flags */ + + osfd = _PR_MD_OPEN(name, flags, mode); + if (osfd != -1) { + fd = PR_AllocFileDesc(osfd, &_pr_fileMethods); + if (!fd) { + (void) _PR_MD_CLOSE_FILE(osfd); + } + } + return fd; +} + +PRInt32 PR_GetSysfdTableMax(void) +{ +#if defined(XP_UNIX) && !defined(AIX) + struct rlimit rlim; + + if ( getrlimit(RLIMIT_NOFILE, &rlim) < 0) { + /* XXX need to call PR_SetError() */ + return -1; + } + + return rlim.rlim_max; +#elif defined(AIX) + return sysconf(_SC_OPEN_MAX); +#elif defined(WIN32) || defined(OS2) + /* + * There is a systemwide limit of 65536 user handles. + * Not sure on OS/2, but sounds good. + */ + return 16384; +#elif defined (WIN16) + return FOPEN_MAX; +#elif defined (XP_MAC) + PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0); + return -1; +#else + write me; +#endif +} + +PRInt32 PR_SetSysfdTableSize(int table_size) +{ +#if defined(XP_UNIX) && !defined(AIX) + struct rlimit rlim; + PRInt32 tableMax = PR_GetSysfdTableMax(); + + if (tableMax < 0) + return -1; + + if (tableMax > FD_SETSIZE) + tableMax = FD_SETSIZE; + + rlim.rlim_max = tableMax; + + /* Grow as much as we can; even if too big */ + if ( rlim.rlim_max < table_size ) + rlim.rlim_cur = rlim.rlim_max; + else + rlim.rlim_cur = table_size; + + if ( setrlimit(RLIMIT_NOFILE, &rlim) < 0) { + /* XXX need to call PR_SetError() */ + return -1; + } + + return rlim.rlim_cur; +#elif defined(AIX) || defined(WIN32) || defined(WIN16) || defined(OS2) + PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0); + return -1; +#elif defined (XP_MAC) +#pragma unused (table_size) + PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0); + return -1; +#else + write me; +#endif +} + +PR_IMPLEMENT(PRStatus) PR_Delete(const char *name) +{ + PRInt32 rv; + + rv = _PR_MD_DELETE(name); + if (rv < 0) { + return PR_FAILURE; + } else + return PR_SUCCESS; +} + +PR_IMPLEMENT(PRStatus) PR_GetFileInfo(const char *fn, PRFileInfo *info) +{ + PRInt32 rv; + + rv = _PR_MD_GETFILEINFO(fn, info); + if (rv < 0) { + return PR_FAILURE; + } else + return PR_SUCCESS; +} + +PR_IMPLEMENT(PRStatus) PR_GetFileInfo64(const char *fn, PRFileInfo64 *info) +{ + PRInt32 rv; + + rv = _PR_MD_GETFILEINFO64(fn, info); + if (rv < 0) { + return PR_FAILURE; + } else { + return PR_SUCCESS; + } +} + +PR_IMPLEMENT(PRStatus) PR_Rename(const char *from, const char *to) +{ + PRInt32 rv; + + rv = _PR_MD_RENAME(from, to); + if (rv < 0) { + return PR_FAILURE; + } else + return PR_SUCCESS; +} + +PR_IMPLEMENT(PRStatus) PR_Access(const char *name, PRAccessHow how) +{ +PRInt32 rv; + + rv = _PR_MD_ACCESS(name, how); + if (rv < 0) { + return PR_FAILURE; + } else + return PR_SUCCESS; +} + +/* +** Import an existing OS file to NSPR +*/ +PR_IMPLEMENT(PRFileDesc*) PR_ImportFile(PRInt32 osfd) +{ + PRFileDesc *fd = NULL; + + fd = PR_AllocFileDesc(osfd, &_pr_fileMethods); + if( !fd ) { + (void) _PR_MD_CLOSE_FILE(osfd); + } + + return fd; +} + +#ifndef NO_NSPR_10_SUPPORT +/* +** PR_Stat() for Win16 is defined in w16io.c +** it is a hack to circumvent problems in Gromit and Java +** See also: BugSplat: 98516. +*/ +#if !defined(WIN16) +/* + * This function is supposed to be for backward compatibility with + * nspr 1.0. Therefore, it still uses the nspr 1.0 error-reporting + * mechanism -- returns a PRInt32, which is the error code when the call + * fails. + * + * If we need this function in nspr 2.0, it should be changed to + * return PRStatus, as follows: + * + * PR_IMPLEMENT(PRStatus) PR_Stat(const char *name, struct stat *buf) + * { + * PRInt32 rv; + * + * rv = _PR_MD_STAT(name, buf); + * if (rv < 0) + * return PR_FAILURE; + * else + * return PR_SUCCESS; + * } + * + * -- wtc, 2/14/97. + */ +PR_IMPLEMENT(PRInt32) PR_Stat(const char *name, struct stat *buf) +{ + PRInt32 rv; + + rv = _PR_MD_STAT(name, buf); + return rv; +} + +#endif /* !defined(WIN16) */ +#endif /* ! NO_NSPR_10_SUPPORT */ + +PR_IMPLEMENT(PRStatus) PR_LockFile(PRFileDesc *fd) +{ + PRStatus rv = PR_SUCCESS; + + PR_Lock(_pr_flock_lock); + if (fd->secret->lockCount == 0) { + rv = _PR_MD_LOCKFILE(fd->secret->md.osfd); + if (rv == PR_SUCCESS) + fd->secret->lockCount = 1; + } else { + fd->secret->lockCount++; + } + PR_Unlock(_pr_flock_lock); + + return rv; +} + +PR_IMPLEMENT(PRStatus) PR_TLockFile(PRFileDesc *fd) +{ + PRStatus rv = PR_SUCCESS; + + PR_Lock(_pr_flock_lock); + if (fd->secret->lockCount == 0) { + rv = _PR_MD_TLOCKFILE(fd->secret->md.osfd); + PR_ASSERT(rv == PR_SUCCESS || fd->secret->lockCount == 0); + if (rv == PR_SUCCESS) + fd->secret->lockCount = 1; + } else { + fd->secret->lockCount++; + } + PR_Unlock(_pr_flock_lock); + + return rv; +} + +PR_IMPLEMENT(PRStatus) PR_UnlockFile(PRFileDesc *fd) +{ + PRStatus rv = PR_SUCCESS; + + PR_Lock(_pr_flock_lock); + if (fd->secret->lockCount == 1) { + rv = _PR_MD_UNLOCKFILE(fd->secret->md.osfd); + if (rv == PR_SUCCESS) + fd->secret->lockCount = 0; + } else { + fd->secret->lockCount--; + } + PR_Unlock(_pr_flock_lock); + + return rv; +} + +PR_IMPLEMENT(PRStatus) PR_CreatePipe( + PRFileDesc **readPipe, + PRFileDesc **writePipe +) +{ +#if defined(XP_MAC) +#pragma unused (readPipe, writePipe) +#endif + +#ifdef WIN32 + HANDLE readEnd, writeEnd; + SECURITY_ATTRIBUTES pipeAttributes; + + ZeroMemory(&pipeAttributes, sizeof(pipeAttributes)); + pipeAttributes.nLength = sizeof(pipeAttributes); + pipeAttributes.bInheritHandle = TRUE; + if (CreatePipe(&readEnd, &writeEnd, &pipeAttributes, 0) == 0) { + PR_SetError(PR_UNKNOWN_ERROR, GetLastError()); + return PR_FAILURE; + } + *readPipe = PR_AllocFileDesc((PRInt32)readEnd, &_pr_fileMethods); + if (NULL == *readPipe) { + CloseHandle(readEnd); + CloseHandle(writeEnd); + return PR_FAILURE; + } + *writePipe = PR_AllocFileDesc((PRInt32)writeEnd, &_pr_fileMethods); + if (NULL == *writePipe) { + PR_Close(*readPipe); + CloseHandle(writeEnd); + return PR_FAILURE; + } +#ifdef WINNT + (*readPipe)->secret->md.nonoverlapped = PR_TRUE; + (*writePipe)->secret->md.nonoverlapped = PR_TRUE; +#endif + return PR_SUCCESS; +#elif defined(XP_UNIX) + int pipefd[2]; + + if (pipe(pipefd) == -1) { + /* XXX map pipe error */ + PR_SetError(PR_UNKNOWN_ERROR, errno); + return PR_FAILURE; + } + *readPipe = PR_AllocFileDesc(pipefd[0], &_pr_fileMethods); + if (NULL == *readPipe) { + close(pipefd[0]); + close(pipefd[1]); + return PR_FAILURE; + } + *writePipe = PR_AllocFileDesc(pipefd[1], &_pr_fileMethods); + if (NULL == *writePipe) { + PR_Close(*readPipe); + close(pipefd[1]); + return PR_FAILURE; + } + _MD_MakeNonblock(*readPipe); + _MD_MakeNonblock(*writePipe); + return PR_SUCCESS; +#else + PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0); + return PR_FAILURE; +#endif +} |