diff options
Diffstat (limited to 'winsup/cygwin/fhandler_proc.cc')
| -rw-r--r-- | winsup/cygwin/fhandler_proc.cc | 509 |
1 files changed, 0 insertions, 509 deletions
diff --git a/winsup/cygwin/fhandler_proc.cc b/winsup/cygwin/fhandler_proc.cc deleted file mode 100644 index 0338acd85..000000000 --- a/winsup/cygwin/fhandler_proc.cc +++ /dev/null @@ -1,509 +0,0 @@ -/* fhandler_proc.cc: fhandler for /proc virtual filesystem - - Copyright 2002 Red Hat, Inc. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#include "winsup.h" -#include <errno.h> -#include <unistd.h> -#include <stdlib.h> -#include <sys/cygwin.h> -#include <ntdef.h> -#include "cygerrno.h" -#include "security.h" -#include "fhandler.h" -#include "path.h" -#include "pinfo.h" -#include "dtable.h" -#include "cygheap.h" -#include <assert.h> -#include <sys/utsname.h> -#include <sys/param.h> -#include "ntdll.h" - -#define _COMPILING_NEWLIB -#include <dirent.h> - -/* offsets in proc_listing */ -static const int PROC_LOADAVG = 2; // /proc/loadavg -static const int PROC_MEMINFO = 3; // /proc/meminfo -static const int PROC_REGISTRY = 4; // /proc/registry -static const int PROC_STAT = 5; // /proc/stat -static const int PROC_VERSION = 6; // /proc/version -static const int PROC_UPTIME = 7; // /proc/uptime - -/* names of objects in /proc */ -static const char *proc_listing[] = { - ".", - "..", - "loadavg", - "meminfo", - "registry", - "stat", - "version", - "uptime", - NULL -}; - -static const int PROC_LINK_COUNT = (sizeof (proc_listing) / sizeof (const char *)) - 1; - -/* FH_PROC in the table below means the file/directory is handles by - * fhandler_proc. - */ -static const DWORD proc_fhandlers[PROC_LINK_COUNT] = { - FH_PROC, - FH_PROC, - FH_PROC, - FH_PROC, - FH_REGISTRY, - FH_PROC, - FH_PROC, - FH_PROC -}; - -/* name of the /proc filesystem */ -const char proc[] = "/proc"; -const int proc_len = sizeof (proc) - 1; - -static off_t format_proc_meminfo (char *destbuf, size_t maxsize); -static off_t format_proc_stat (char *destbuf, size_t maxsize); -static off_t format_proc_uptime (char *destbuf, size_t maxsize); - -/* auxillary function that returns the fhandler associated with the given path - * this is where it would be nice to have pattern matching in C - polymorphism - * just doesn't cut it - */ -DWORD -fhandler_proc::get_proc_fhandler (const char *path) -{ - debug_printf ("get_proc_fhandler(%s)", path); - path += proc_len; - /* Since this method is called from path_conv::check we can't rely on - * it being normalised and therefore the path may have runs of slashes - * in it. - */ - while (SLASH_P (*path)) - path++; - - /* Check if this is the root of the virtual filesystem (i.e. /proc). */ - if (*path == 0) - return FH_PROC; - - for (int i = 0; proc_listing[i]; i++) - { - if (path_prefix_p (proc_listing[i], path, strlen (proc_listing[i]))) - return proc_fhandlers[i]; - } - - if (pinfo (atoi (path))) - return FH_PROCESS; - - bool has_subdir = false; - while (*path) - if (SLASH_P (*path++)) - { - has_subdir = true; - break; - } - - if (has_subdir) - /* The user is trying to access a non-existent subdirectory of /proc. */ - return FH_BAD; - else - /* Return FH_PROC so that we can return EROFS if the user is trying to create - a file. */ - return FH_PROC; -} - -/* Returns 0 if path doesn't exist, >0 if path is a directory, - * <0 if path is a file. - */ -int -fhandler_proc::exists () -{ - const char *path = get_name (); - debug_printf ("exists (%s)", path); - path += proc_len; - if (*path == 0) - return 2; - for (int i = 0; proc_listing[i]; i++) - if (pathmatch (path + 1, proc_listing[i])) - return (proc_fhandlers[i] == FH_PROC) ? -1 : 1; - return 0; -} - -fhandler_proc::fhandler_proc (): - fhandler_virtual (FH_PROC) -{ -} - -fhandler_proc::fhandler_proc (DWORD devtype): - fhandler_virtual (devtype) -{ -} - -int -fhandler_proc::fstat (struct __stat64 *buf, path_conv *pc) -{ - const char *path = get_name (); - debug_printf ("fstat (%s)", path); - - path += proc_len; - (void) fhandler_base::fstat (buf, pc); - - buf->st_mode &= ~_IFMT & NO_W; - - if (!*path) - { - buf->st_nlink = PROC_LINK_COUNT; - buf->st_mode |= S_IFDIR | S_IXUSR | S_IXGRP | S_IXOTH; - return 0; - } - else - { - path++; - for (int i = 0; proc_listing[i]; i++) - if (pathmatch (path, proc_listing[i])) - { - if (proc_fhandlers[i] != FH_PROC) - buf->st_mode |= S_IFDIR | S_IXUSR | S_IXGRP | S_IXOTH; - else - { - buf->st_mode &= NO_X; - buf->st_mode |= S_IFREG; - } - return 0; - } - } - set_errno (ENOENT); - return -1; -} - -struct dirent * -fhandler_proc::readdir (DIR * dir) -{ - if (dir->__d_position >= PROC_LINK_COUNT) - { - winpids pids; - int found = 0; - for (unsigned i = 0; i < pids.npids; i++) - if (found++ == dir->__d_position - PROC_LINK_COUNT) - { - __small_sprintf (dir->__d_dirent->d_name, "%d", pids[i]->pid); - dir->__d_position++; - return dir->__d_dirent; - } - set_errno (ENMFILE); - return NULL; - } - - strcpy (dir->__d_dirent->d_name, proc_listing[dir->__d_position++]); - syscall_printf ("%p = readdir (%p) (%s)", &dir->__d_dirent, dir, - dir->__d_dirent->d_name); - return dir->__d_dirent; -} - -int -fhandler_proc::open (path_conv *pc, int flags, mode_t mode) -{ - int proc_file_no = -1; - - int res = fhandler_virtual::open (pc, flags, mode); - if (!res) - goto out; - - set_nohandle (true); - - const char *path; - - path = get_name () + proc_len; - - if (!*path) - { - if ((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) - { - set_errno (EEXIST); - res = 0; - goto out; - } - else if (flags & O_WRONLY) - { - set_errno (EISDIR); - res = 0; - goto out; - } - else - { - flags |= O_DIROPEN; - goto success; - } - } - - proc_file_no = -1; - for (int i = 0; proc_listing[i]; i++) - if (path_prefix_p (proc_listing[i], path + 1, strlen (proc_listing[i]))) - { - proc_file_no = i; - if (proc_fhandlers[i] != FH_PROC) - { - if ((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) - { - set_errno (EEXIST); - res = 0; - goto out; - } - else if (flags & O_WRONLY) - { - set_errno (EISDIR); - res = 0; - goto out; - } - else - { - flags |= O_DIROPEN; - goto success; - } - } - } - - if (proc_file_no == -1) - { - if (flags & O_CREAT) - { - set_errno (EROFS); - res = 0; - goto out; - } - else - { - set_errno (ENOENT); - res = 0; - goto out; - } - } - if (flags & O_WRONLY) - { - set_errno (EROFS); - res = 0; - goto out; - } - - fileid = proc_file_no; - if (!fill_filebuf ()) - { - res = 0; - goto out; - } - - if (flags & O_APPEND) - position = filesize; - else - position = 0; - -success: - res = 1; - set_flags ((flags & ~O_TEXT) | O_BINARY); - set_open_status (); -out: - syscall_printf ("%d = fhandler_proc::open (%p, %d)", res, flags, mode); - return res; -} - -bool -fhandler_proc::fill_filebuf () -{ - switch (fileid) - { - case PROC_VERSION: - { - if (!filebuf) - { - struct utsname uts_name; - uname (&uts_name); - bufalloc = strlen (uts_name.sysname) + 1 + strlen (uts_name.release) + - 1 + strlen (uts_name.version) + 2; - filebuf = (char *) cmalloc (HEAP_BUF, bufalloc); - filesize = __small_sprintf (filebuf, "%s %s %s\n", uts_name.sysname, - uts_name.release, uts_name.version); - } - break; - } - case PROC_UPTIME: - { - if (!filebuf) - filebuf = (char *) cmalloc (HEAP_BUF, bufalloc = 80); - filesize = format_proc_uptime (filebuf, bufalloc); - break; - } - case PROC_STAT: - { - if (!filebuf) - filebuf = (char *) cmalloc (HEAP_BUF, bufalloc = 2048); - filesize = format_proc_stat (filebuf, bufalloc); - break; - } - case PROC_LOADAVG: - { - /* - * not really supported - Windows doesn't keep track of these values - * Windows 95/98/me does have the KERNEL/CPUUsage performance counter - * which is similar. - */ - if (!filebuf) - filebuf = (char *) cmalloc (HEAP_BUF, bufalloc = 16); - filesize = __small_sprintf (filebuf, "%u.%02u %u.%02u %u.%02u\n", - 0, 0, 0, 0, 0, 0); - break; - } - case PROC_MEMINFO: - { - if (!filebuf) - filebuf = (char *) cmalloc (HEAP_BUF, bufalloc = 2048); - filesize = format_proc_meminfo (filebuf, bufalloc); - break; - } - } - return true; -} - -static -off_t -format_proc_meminfo (char *destbuf, size_t maxsize) -{ - unsigned long mem_total = 0UL, mem_free = 0UL, swap_total = 0UL, - swap_free = 0UL; - MEMORYSTATUS memory_status; - GlobalMemoryStatus (&memory_status); - mem_total = memory_status.dwTotalPhys; - mem_free = memory_status.dwAvailPhys; - swap_total = memory_status.dwTotalPageFile; - swap_free = memory_status.dwAvailPageFile; - return __small_sprintf (destbuf, " total: used: free:\n" - "Mem: %10lu %10lu %10lu\n" - "Swap: %10lu %10lu %10lu\n" - "MemTotal: %10lu kB\n" - "MemFree: %10lu kB\n" - "MemShared: 0 kB\n" - "HighTotal: 0 kB\n" - "HighFree: 0 kB\n" - "LowTotal: %10lu kB\n" - "LowFree: %10lu kB\n" - "SwapTotal: %10lu kB\n" - "SwapFree: %10lu kB\n", - mem_total, mem_total - mem_free, mem_free, - swap_total, swap_total - swap_free, swap_free, - mem_total >> 10, mem_free >> 10, - mem_total >> 10, mem_free >> 10, - swap_total >> 10, swap_free >> 10); -} - -static -off_t -format_proc_uptime (char *destbuf, size_t maxsize) -{ - unsigned long long uptime = 0ULL, idle_time = 0ULL; - SYSTEM_PROCESSOR_TIMES spt; - - NTSTATUS ret = NtQuerySystemInformation (SystemProcessorTimes, (PVOID) &spt, - sizeof spt, NULL); - if (!ret && GetLastError () == ERROR_PROC_NOT_FOUND) - uptime = GetTickCount () / 10; - else if (ret != STATUS_SUCCESS) - { - __seterrno_from_win_error (RtlNtStatusToDosError (ret)); - debug_printf("NtQuerySystemInformation: ret = %d, " - "Dos(ret) = %d", - ret, RtlNtStatusToDosError (ret)); - return 0; - } - else - { - idle_time = spt.IdleTime.QuadPart / 100000ULL; - uptime = (spt.KernelTime.QuadPart + - spt.UserTime.QuadPart) / 100000ULL; - } - - return __small_sprintf (destbuf, "%U.%02u %U.%02u\n", - uptime / 100, long (uptime % 100), - idle_time / 100, long (idle_time % 100)); -} - -static -off_t -format_proc_stat (char *destbuf, size_t maxsize) -{ - unsigned long long user_time = 0ULL, kernel_time = 0ULL, idle_time = 0ULL; - unsigned long pages_in = 0UL, pages_out = 0UL, interrupt_count = 0UL, - context_switches = 0UL, swap_in = 0UL, swap_out = 0UL; - time_t boot_time = 0; - - if (wincap.is_winnt ()) - { - NTSTATUS ret; - SYSTEM_PROCESSOR_TIMES spt; - SYSTEM_PERFORMANCE_INFORMATION spi; - SYSTEM_TIME_OF_DAY_INFORMATION stodi; - ret = NtQuerySystemInformation (SystemProcessorTimes, - (PVOID) &spt, - sizeof spt, NULL); - if (ret == STATUS_SUCCESS) - ret = NtQuerySystemInformation (SystemPerformanceInformation, - (PVOID) &spi, - sizeof spi, NULL); - if (ret == STATUS_SUCCESS) - ret = NtQuerySystemInformation (SystemTimeOfDayInformation, - (PVOID) &stodi, - sizeof stodi, NULL); - if (ret != STATUS_SUCCESS) - { - __seterrno_from_win_error (RtlNtStatusToDosError (ret)); - debug_printf("NtQuerySystemInformation: ret = %d, " - "Dos(ret) = %d", - ret, RtlNtStatusToDosError (ret)); - return 0; - } - kernel_time = (spt.KernelTime.QuadPart - spt.IdleTime.QuadPart) * HZ / 10000000ULL; - user_time = spt.UserTime.QuadPart * HZ / 10000000ULL; - idle_time = spt.IdleTime.QuadPart * HZ / 10000000ULL; - interrupt_count = spt.InterruptCount; - pages_in = spi.PagesRead; - pages_out = spi.PagefilePagesWritten + spi.MappedFilePagesWritten; - /* - * Note: there is no distinction made in this structure between pages - * read from the page file and pages read from mapped files, but there - * is such a distinction made when it comes to writing. Goodness knows - * why. The value of swap_in, then, will obviously be wrong but its our - * best guess. - */ - swap_in = spi.PagesRead; - swap_out = spi.PagefilePagesWritten; - context_switches = spi.ContextSwitches; - boot_time = to_time_t ((FILETIME *) &stodi.BootTime.QuadPart); - } - /* - * else - * { - * There are only two relevant performance counters on Windows 95/98/me, - * VMM/cPageIns and VMM/cPageOuts. The extra effort needed to read these - * counters is by no means worth it. - * } - */ - return __small_sprintf (destbuf, "cpu %U %U %U %U\n" - "page %u %u\n" - "swap %u %u\n" - "intr %u\n" - "ctxt %u\n" - "btime %u\n", - user_time, 0ULL, - kernel_time, idle_time, - pages_in, pages_out, - swap_in, swap_out, - interrupt_count, - context_switches, - boot_time); -} |