lsxid.c (4320B)
1 // $Id$ --*- c -*-- 2 3 // Copyright (C) 2004 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de> 4 // 5 // This program is free software; you can redistribute it and/or modify 6 // it under the terms of the GNU General Public License as published by 7 // the Free Software Foundation; version 2 of the License. 8 // 9 // This program is distributed in the hope that it will be useful, 10 // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 // GNU General Public License for more details. 13 // 14 // You should have received a copy of the GNU General Public License 15 // along with this program; if not, write to the Free Software 16 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 17 18 19 #ifdef HAVE_CONFIG_H 20 # include <config.h> 21 #endif 22 23 #include "fstool.h" 24 #include "util.h" 25 26 #include <ensc_vector/vector.h> 27 #include <lib/vserver.h> 28 #include <lib/vserver-internal.h> 29 30 #include <stdio.h> 31 #include <stdlib.h> 32 #include <unistd.h> 33 #include <sys/param.h> 34 #include <sys/types.h> 35 #include <sys/stat.h> 36 #include <fcntl.h> 37 #include <assert.h> 38 39 #define ENSC_WRAPPERS_STDLIB 1 40 #include <wrappers.h> 41 42 struct option const 43 CMDLINE_OPTIONS[] = { 44 { "help", no_argument, 0, CMD_HELP }, 45 { "version", no_argument, 0, CMD_VERSION }, 46 { 0,0,0,0 } 47 }; 48 49 char const CMDLINE_OPTIONS_SHORT[] = "Radnx"; 50 51 struct XidNameMapping { 52 xid_t xid; 53 char const * name; 54 }; 55 56 static struct Vector xid_name_mapping; 57 58 void 59 showHelp(int fd, char const *cmd, int res) 60 { 61 WRITE_MSG(fd, "Usage: "); 62 WRITE_STR(fd, cmd); 63 WRITE_MSG(fd, 64 " [-Radnx] [--] <file>*\n\n" 65 " Options:\n" 66 " -R ... recurse through directories\n" 67 " -a ... display files starting with '.' also\n" 68 " -d ... list directories like other files instead of\n" 69 " listing their content\n" 70 " -n ... do not try to do xid -> vserver-name mapping\n" 71 " -x ... do not cross filesystems\n\n" 72 "Please report bugs to " PACKAGE_BUGREPORT "\n"); 73 exit(res); 74 } 75 76 void 77 showVersion() 78 { 79 WRITE_MSG(1, 80 "lsxid " VERSION " -- shows the context which is associated to a file\n" 81 "This program is part of " PACKAGE_STRING "\n\n" 82 "Copyright (C) 2004 Enrico Scholz\n" 83 VERSION_COPYRIGHT_DISCLAIMER); 84 exit(0); 85 } 86 87 void 88 fixupParams(struct Arguments UNUSED * args, int UNUSED argc) 89 { 90 Vector_init(&xid_name_mapping, sizeof (struct XidNameMapping)); 91 } 92 93 static int 94 cmpMap(void const *xid_v, void const *map_v) 95 { 96 xid_t const * const xid = xid_v; 97 struct XidNameMapping const * const map = map_v; 98 99 return *xid - map->xid; 100 } 101 102 static char const * 103 lookupContext(xid_t xid) 104 { 105 struct XidNameMapping *res; 106 107 res = Vector_search(&xid_name_mapping, &xid, cmpMap); 108 109 if (res==0) { 110 vcCfgStyle style = vcCFG_AUTO; 111 char const * vcfg = vc_getVserverByCtx(xid, &style, 0); 112 113 res = Vector_insert(&xid_name_mapping, &xid, cmpMap); 114 if (vcfg) res->name = vc_getVserverName(vcfg, style); 115 else res->name = 0; 116 res->xid = xid; 117 118 free(const_cast(char *)(vcfg)); 119 } 120 121 assert(res!=0); 122 123 return res->name; 124 } 125 126 static xid_t 127 getFileContext(char const *name) 128 { 129 xid_t res; 130 uint32_t mask = VC_IATTR_XID; 131 132 if (vc_get_iattr(name, &res, 0, &mask)==-1) 133 perror("vc_get_iattr()"); 134 135 return (mask&VC_IATTR_XID) ? res : VC_NOCTX; 136 } 137 138 bool 139 handleFile(char const *name, char const *display_name) 140 { 141 xid_t ctx = 0; 142 char buf[MAX(sizeof(ctx)*3+1, 20)]; 143 bool need_write = true; 144 145 memset(buf, ' ', sizeof buf); 146 147 #if 1 148 ctx = getFileContext(name); 149 #else 150 # warning Compiling in debug-code 151 ctx = random() % 10 + 49213; 152 #endif 153 154 if (ctx==VC_NOCTX) { 155 memcpy(buf, "!!ERR!!", 7); 156 Vwrite(1, buf, sizeof buf); 157 need_write = false; 158 } 159 else if (global_args->do_mapping) { 160 char const * vname = lookupContext(ctx); 161 if (!vname) buf[0] = '\0'; 162 else { 163 size_t l = strlen(vname); 164 if (l<sizeof(buf)) Vwrite(1, buf, sizeof(buf)-l); 165 Vwrite(1, vname, l); 166 167 need_write = false; 168 } 169 } 170 171 if (need_write) { 172 size_t l = utilvserver_fmt_ulong(buf, ctx); 173 if (l<sizeof(buf)) Vwrite(1, buf+l, sizeof(buf)-l); 174 Vwrite(1, buf, l); 175 } 176 177 Vwrite(1, " ", 2); 178 Vwrite(1, display_name, strlen(display_name)); 179 Vwrite(1, "\n", 1); 180 181 return ctx!=VC_NOCTX; 182 }