Annotation of libwww/Library/src/HTHome.c, revision 2.1
2.1 ! frystyk 1: /* HTHome.c
! 2: ** GENERATION OF THE HOME ANCHOR
! 3: **
! 4: ** (c) COPYRIGHT MIT 1995.
! 5: ** Please first read the full copyright statement in the file COPYRIGH.
! 6: **
! 7: ** Authors
! 8: ** TBL Tim Berners-Lee timbl@w3.org
! 9: ** JFG Jean-Francois Groff jfg@dxcern.cern.ch
! 10: ** DD Denis DeLaRoca (310) 825-4580 <CSP1DWD@mvs.oac.ucla.edu>
! 11: ** History
! 12: ** 8 Jun 92 Telnet hopping prohibited as telnet is not secure TBL
! 13: ** 26 Jun 92 When over DECnet, suppressed FTP, Gopher and News. JFG
! 14: ** 6 Oct 92 Moved HTClientHost and HTlogfile into here. TBL
! 15: ** 17 Dec 92 Tn3270 added, bug fix. DD
! 16: ** 4 Feb 93 Access registration, Search escapes bad chars TBL
! 17: ** PARAMETERS TO HTSEARCH AND HTLOADRELATIVE CHANGED
! 18: ** 28 May 93 WAIS gateway explicit if no WAIS library linked in.
! 19: ** Dec 93 Bug change around, more reentrant, etc
! 20: ** 09 May 94 logfile renamed to HTlogfile to avoid clash with WAIS
! 21: ** 8 Jul 94 Insulate free() from _free structure element.
! 22: ** Sep 95 Rewritten, HFN
! 23: ** Nov 95 Spawned from HTAccess.c
! 24: */
! 25:
! 26: /* Library include files */
! 27: #include "WWWLib.h"
! 28: #include "HTHome.h" /* Implemented here */
! 29:
! 30: /* ------------------------------------------------------------------------- */
! 31:
! 32: /* Find Related Name
! 33: ** -----------------
! 34: ** Creates a string that can be used as a related name when
! 35: ** calling HTParse initially.
! 36: **
! 37: ** The code for this routine originates from the Linemode
! 38: ** browser and was moved here by howcome@w3.org
! 39: ** in order for all clients to take advantage.
! 40: ** The string returned must be freed by the caller
! 41: */
! 42: PUBLIC char * HTFindRelatedName (void)
! 43: {
! 44: char* default_default = NULL; /* Parse home relative to this */
! 45: CONST char *host = HTGetHostName();
! 46: StrAllocCopy(default_default, "file://");
! 47: if (host)
! 48: StrAllocCat(default_default, host);
! 49: else
! 50: StrAllocCat(default_default, "localhost");
! 51: {
! 52: char wd[HT_MAX_PATH+1];
! 53:
! 54: #ifdef NO_GETWD
! 55: #ifdef HAS_GETCWD /* System V variant SIGN CHANGED TBL 921006 !! */
! 56: char *result = (char *) getcwd(wd, sizeof(wd));
! 57: #else
! 58: char *result = NULL;
! 59: HTAlert("This platform does not support neither getwd nor getcwd\n");
! 60: #endif
! 61: #else
! 62: char *result = (char *) getwd(wd);
! 63: #endif
! 64: *(wd+HT_MAX_PATH) = '\0';
! 65: if (result) {
! 66: #ifdef VMS
! 67: /* convert directory name to Unix-style syntax */
! 68: char * disk = strchr (wd, ':');
! 69: char * dir = strchr (wd, '[');
! 70: if (disk) {
! 71: *disk = '\0';
! 72: StrAllocCat (default_default, "/"); /* needs delimiter */
! 73: StrAllocCat (default_default, wd);
! 74: }
! 75: if (dir) {
! 76: char *p;
! 77: *dir = '/'; /* Convert leading '[' */
! 78: for (p = dir ; *p != ']'; ++p)
! 79: if (*p == '.') *p = '/';
! 80: *p = '\0'; /* Cut on final ']' */
! 81: StrAllocCat (default_default, dir);
! 82: }
! 83: #else /* not VMS */
! 84: #ifdef WIN32
! 85: char * p = wd ; /* a colon */
! 86: StrAllocCat(default_default, "/");
! 87: while( *p != 0 ) {
! 88: if (*p == '\\') /* change to one true slash */
! 89: *p = '/' ;
! 90: p++;
! 91: }
! 92: StrAllocCat( default_default, wd);
! 93: #else /* not WIN32 */
! 94: StrAllocCat (default_default, wd);
! 95: #endif /* not WIN32 */
! 96: #endif /* not VMS */
! 97: }
! 98: }
! 99: StrAllocCat(default_default, "/default.html");
! 100: return default_default;
! 101: }
! 102:
! 103:
! 104: /* Generate the anchor for the home page
! 105: ** -------------------------------------
! 106: **
! 107: ** As it involves file access, this should only be done once
! 108: ** when the program first runs.
! 109: ** This is a default algorithm -- browser don't HAVE to use this.
! 110: ** But consistency betwen browsers is STRONGLY recommended!
! 111: **
! 112: ** Priority order is:
! 113: **
! 114: ** 1 WWW_HOME environment variable (logical name, etc)
! 115: ** 2 ~/WWW/default.html
! 116: ** 3 /usr/local/bin/default.html
! 117: ** 4 http://www.w3.org/default.html
! 118: **
! 119: */
! 120: PUBLIC HTParentAnchor * HTHomeAnchor (void)
! 121: {
! 122: char * my_home_document = NULL;
! 123: char * home = (char *) getenv(LOGICAL_DEFAULT);
! 124: char * ref;
! 125: HTParentAnchor * anchor;
! 126:
! 127: /* Someone telnets in, they get a special home */
! 128: if (home) {
! 129: StrAllocCopy(my_home_document, home);
! 130: } else if (HTLib_secure()) { /* Telnet server */
! 131: FILE * fp = fopen(REMOTE_POINTER, "r");
! 132: char * status;
! 133: if (fp) {
! 134: my_home_document = (char*) malloc(HT_MAX_PATH);
! 135: status = fgets(my_home_document, HT_MAX_PATH, fp);
! 136: if (!status) {
! 137: free(my_home_document);
! 138: my_home_document = NULL;
! 139: }
! 140: fclose(fp);
! 141: }
! 142: if (!my_home_document) StrAllocCopy(my_home_document, REMOTE_ADDRESS);
! 143: }
! 144:
! 145: #ifdef unix
! 146: if (!my_home_document) {
! 147: FILE * fp = NULL;
! 148: char * home = (char *) getenv("HOME");
! 149: if (home) {
! 150: my_home_document = (char *)malloc(
! 151: strlen(home)+1+ strlen(PERSONAL_DEFAULT)+1);
! 152: if (my_home_document == NULL) outofmem(__FILE__, "HTLocalName");
! 153: sprintf(my_home_document, "%s/%s", home, PERSONAL_DEFAULT);
! 154: fp = fopen(my_home_document, "r");
! 155: }
! 156:
! 157: if (!fp) {
! 158: StrAllocCopy(my_home_document, LOCAL_DEFAULT_FILE);
! 159: fp = fopen(my_home_document, "r");
! 160: }
! 161: if (fp) {
! 162: fclose(fp);
! 163: } else {
! 164: if (WWWTRACE)
! 165: TTYPrint(TDEST,
! 166: "HTBrowse: No local home document ~/%s or %s\n",
! 167: PERSONAL_DEFAULT, LOCAL_DEFAULT_FILE);
! 168: free(my_home_document);
! 169: my_home_document = NULL;
! 170: }
! 171: }
! 172: #endif
! 173: ref = HTParse(my_home_document ? my_home_document :
! 174: HTLib_secure() ? REMOTE_ADDRESS : LAST_RESORT, "file:",
! 175: PARSE_ACCESS|PARSE_HOST|PARSE_PATH|PARSE_PUNCTUATION);
! 176: if (my_home_document) {
! 177: if (WWWTRACE)
! 178: TTYPrint(TDEST,
! 179: "HTAccess.... `%s\' used for custom home page as\n`%s\'\n",
! 180: my_home_document, ref);
! 181: free(my_home_document);
! 182: }
! 183: anchor = (HTParentAnchor*) HTAnchor_findAddress(ref);
! 184: free(ref);
! 185: return anchor;
! 186: }
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