/* $Id: local.c,v 1.23 2003/01/17 17:06:03 ukai Exp $ */ #include "fm.h" #include #include #include #include #include #include #include #ifdef HAVE_READLINK #include #endif /* HAVE_READLINK */ #ifdef __EMX__ #include /* _MAX_PATH ? */ #endif /* __EMX__ */ #include "local.h" #include "hash.h" #define CGIFN_NORMAL 0 #define CGIFN_DROOT 1 #define CGIFN_CGIBIN 2 #define CGIFN_MODE(x) ((x)&3) #define CGIFN_CONTAIN_SLASH 4 static char *Local_cookie_file = NULL; static void writeLocalCookie() { FILE *f; if (no_rc_dir) return; if (Local_cookie_file) return; Local_cookie_file = tmpfname(TMPF_COOKIE, NULL)->ptr; set_environ("LOCAL_COOKIE_FILE", Local_cookie_file); f = fopen(Local_cookie_file, "wb"); if (!f) return; fwrite(Local_cookie->ptr, sizeof(char), Local_cookie->length, f); fclose(f); chmod(Local_cookie_file, S_IRUSR | S_IWUSR); } /* setup cookie for local CGI */ void setLocalCookie() { char hostname[256]; gethostname(hostname, 256); Local_cookie = Sprintf("%d.%ld@%s", CurrentPid, lrand48(), hostname); } Str loadLocalDir(char *dname) { Str tmp; DIR *d; Directory *dir; struct stat st; char **flist; char *p, *qdir; Str fbuf = Strnew(); #ifdef HAVE_LSTAT struct stat lst; #ifdef HAVE_READLINK char lbuf[1024]; #endif /* HAVE_READLINK */ #endif /* HAVE_LSTAT */ int i, l, nrow = 0, n = 0, maxlen = 0; int nfile, nfile_max = 100; Str dirname; d = opendir(dname); if (d == NULL) return NULL; dirname = Strnew_charp(dname); if (Strlastchar(dirname) != '/') Strcat_char(dirname, '/'); qdir = html_quote(Str_conv_from_system(dirname)->ptr); tmp = Strnew_m_charp("\n\n\nDirectory list of ", qdir, "\n\n\n

Directory list of ", qdir, "

\n", NULL); flist = New_N(char *, nfile_max); nfile = 0; while ((dir = readdir(d)) != NULL) { flist[nfile++] = allocStr(dir->d_name, -1); if (nfile == nfile_max) { nfile_max *= 2; flist = New_Reuse(char *, flist, nfile_max); } if (multicolList) { l = strlen(dir->d_name); if (l > maxlen) maxlen = l; n++; } } if (multicolList) { l = COLS / (maxlen + 2); if (!l) l = 1; nrow = (n + l - 1) / l; n = 1; Strcat_charp(tmp, "\n\n"); } qsort((void *)flist, nfile, sizeof(char *), strCmp); for (i = 0; i < nfile; i++) { p = flist[i]; if (strcmp(p, ".") == 0) continue; Strcopy(fbuf, dirname); if (Strlastchar(fbuf) != '/') Strcat_char(fbuf, '/'); Strcat_charp(fbuf, p); #ifdef HAVE_LSTAT if (lstat(fbuf->ptr, &lst) < 0) continue; #endif /* HAVE_LSTAT */ if (stat(fbuf->ptr, &st) < 0) continue; if (multicolList) { if (n == 1) Strcat_charp(tmp, "\n"); n = 1; } else { Strcat_charp(tmp, "
\n"); } } else { #if defined(HAVE_LSTAT) && defined(HAVE_READLINK) if (S_ISLNK(lst.st_mode)) { if ((l = readlink(fbuf->ptr, lbuf, sizeof(lbuf))) > 0) { lbuf[l] = '\0'; Strcat_m_charp(tmp, " -> ", html_quote(conv_from_system(lbuf)), NULL); if (S_ISDIR(st.st_mode)) Strcat_char(tmp, '/'); } } #endif /* HAVE_LSTAT && HAVE_READLINK */ Strcat_charp(tmp, "
\n"); } } if (multicolList) { Strcat_charp(tmp, "\n

"); } else { #ifdef HAVE_LSTAT if (S_ISLNK(lst.st_mode)) Strcat_charp(tmp, "[LINK] "); else #endif /* HAVE_LSTAT */ if (S_ISDIR(st.st_mode)) Strcat_charp(tmp, "[DIR] "); else Strcat_charp(tmp, "[FILE] "); } Strcat_m_charp(tmp, "", html_quote(conv_from_system(p)), NULL); if (S_ISDIR(st.st_mode)) Strcat_char(tmp, '/'); Strcat_charp(tmp, ""); if (multicolList) { if (n++ == nrow) { Strcat_charp(tmp, "

\n"); } Strcat_charp(tmp, "\n\n"); return tmp; } static int check_local_cgi(char *file, int status) { struct stat st; if (status & CGIFN_CONTAIN_SLASH) { /* local CGI file must be just under /cgi-bin/ * or /$LIB/ */ return -1; } #ifdef __EMX__ if (CGIFN_MODE(status) != CGIFN_CGIBIN) { char tmp[_MAX_PATH]; int len; _abspath(tmp, w3m_lib_dir(), _MAX_PATH); /* Translate '\\' to '/' */ len = strlen(tmp); while (len > 1 && tmp[len - 1] == '/') len--; if (strnicmp(file, tmp, len) || /* and ignore case */ (file[len] != '/')) return -1; } #else /* not __EMX__ */ if (CGIFN_MODE(status) != CGIFN_CGIBIN) { char *tmp = Strnew_charp(w3m_lib_dir())->ptr; int len = strlen(tmp); while (len > 1 && tmp[len - 1] == '/') len--; if (strncmp(file, tmp, len) || (file[len] != '/')) /* * a local-CGI script should be located on either * /cgi-bin/ directory or LIB_DIR (typically /usr/local/lib/w3m). */ return -1; } #endif /* not __EMX__ */ if (stat(file, &st) < 0) return -1; if ((st.st_uid == geteuid() && (st.st_mode & S_IXUSR)) || (st.st_gid == getegid() && (st.st_mode & S_IXGRP)) || (st.st_mode & S_IXOTH)) { /* executable */ return 0; } return -1; } void set_environ(char *var, char *value) { #ifdef HAVE_SETENV if (var != NULL && value != NULL) setenv(var, value, 1); #else /* not HAVE_SETENV */ #ifdef HAVE_PUTENV static Hash_sv *env_hash = NULL; Str tmp = Strnew_m_charp(var, "=", value, NULL); if (env_hash == NULL) env_hash = newHash_sv(20); putHash_sv(env_hash, var, (void *)tmp->ptr); putenv(tmp->ptr); #else /* not HAVE_PUTENV */ extern char **environ; char **ne; char *p; int i, l, el; char **e, **newenv; /* I have no setenv() nor putenv() */ /* This part is taken from terms.c of skkfep */ l = strlen(var); for (e = environ, i = 0; *e != NULL; e++, i++) { if (strncmp(e, var, l) == 0 && (*e)[l] == '=') { el = strlen(*e) - l - 1; if (el >= strlen(value)) { strcpy(*e + l + 1, value); return 0; } else { for (; *e != NULL; e++, i++) { *e = *(e + 1); } i--; break; } } } newenv = (char **)GC_malloc((i + 2) * sizeof(char *)); if (newenv == NULL) return; for (e = environ, ne = newenv; *e != NULL; *(ne++) = *(e++)) ; *(ne++) = p; *ne = NULL; environ = newenv; #endif /* not HAVE_PUTENV */ #endif /* not HAVE_SETENV */ } static void set_cgi_environ(char *name, char *fn, char *req_uri) { set_environ("SERVER_SOFTWARE", w3m_version); set_environ("SERVER_PROTOCOL", "HTTP/1.0"); set_environ("SERVER_NAME", "localhost"); set_environ("SERVER_PORT", "80"); /* dummy */ set_environ("REMOTE_HOST", "localhost"); set_environ("REMOTE_ADDR", "127.0.0.1"); set_environ("GATEWAY_INTERFACE", "CGI/1.1"); set_environ("SCRIPT_NAME", name); set_environ("SCRIPT_FILENAME", fn); set_environ("REQUEST_URI", req_uri); } static Str checkPath(char *fn, char *path) { char *p; Str tmp; struct stat st; while (*path) { p = strchr(path, ':'); tmp = Strnew_charp(expandPath(p ? allocStr(path, p - path) : path)); if (Strlastchar(tmp) != '/') Strcat_char(tmp, '/'); Strcat_charp(tmp, fn); if (stat(tmp->ptr, &st) == 0) return tmp; if (!p) break; path = p + 1; while (*path == ':') path++; } return NULL; } static char * cgi_filename(char *fn, int *status) { Str tmp; struct stat st; if (cgi_bin != NULL && strncmp(fn, "/cgi-bin/", 9) == 0) { *status = CGIFN_CGIBIN; if (strchr(fn + 9, '/')) *status |= CGIFN_CONTAIN_SLASH; tmp = checkPath(fn + 9, cgi_bin); if (tmp == NULL) return fn; return tmp->ptr; } if (strncmp(fn, "/$LIB/", 6) == 0) { *status = CGIFN_NORMAL; tmp = Strnew_charp(w3m_lib_dir()); fn += 5; if (strchr(fn + 1, '/')) *status |= CGIFN_CONTAIN_SLASH; if (Strlastchar(tmp) == '/') fn++; Strcat_charp(tmp, fn); return tmp->ptr; } if (*fn == '/' && document_root != NULL && stat(fn, &st) < 0) { *status = CGIFN_DROOT; if (strchr(fn + 1, '/')) *status |= CGIFN_CONTAIN_SLASH; tmp = Strnew_charp(document_root); if (Strlastchar(tmp) != '/') Strcat_char(tmp, '/'); Strcat_charp(tmp, fn); return tmp->ptr; } *status = CGIFN_NORMAL; return fn; } static pid_t localcgi_popen_rw(int *p_fdr, int *p_fdw) { int fdr[2], fdw[2]; pid_t pid; Str emsg; if (pipe(fdr) < 0) { emsg = Sprintf("localcgi_popen_rw: pipe: %s", strerror(errno)); goto pipe_err0; } if (p_fdw && pipe(fdw) < 0) { emsg = Sprintf("localcgi_popen_rw: pipe: %s", strerror(errno)); goto pipe_err1; } flush_tty(); if ((pid = fork()) < 0) { emsg = Sprintf("localcgi_popen_rw: fork: %s", strerror(errno)); goto pipe_err2; } else if (!pid) { close(fdr[0]); dup2(fdr[1], 1); if (p_fdw) { close(fdw[1]); dup2(fdw[0], 0); } setup_child(TRUE, 2, -1); } else { close(fdr[1]); *p_fdr = fdr[0]; if (p_fdw) { close(fdw[0]); *p_fdw = fdw[1]; } } return pid; pipe_err2: close(fdw[0]); close(fdw[1]); pipe_err1: close(fdr[0]); close(fdr[1]); pipe_err0: disp_err_message(emsg->ptr, FALSE); return (pid_t) - 1; } FILE * localcgi_post(char *uri, char *qstr, FormList *request, char *referer) { int fdr, fdw = -1; int status; pid_t pid; char *file; file = cgi_filename(uri, &status); if (check_local_cgi(file, status) < 0) return NULL; writeLocalCookie(); if (request && request->enctype != FORM_ENCTYPE_MULTIPART) pid = localcgi_popen_rw(&fdr, &fdw); else pid = localcgi_popen_rw(&fdr, NULL); if (pid < 0) return NULL; else if (pid) { if (fdw > 0) { write(fdw, request->body, request->length); close(fdw); } return fdopen(fdr, "r"); } if (qstr == NULL) set_cgi_environ(uri, file, uri); else set_cgi_environ(uri, file, Strnew_m_charp(uri, "?", qstr, NULL)->ptr); if (referer && referer != NO_REFERER) set_environ("HTTP_REFERER", referer); if (request) { set_environ("REQUEST_METHOD", "POST"); if (qstr) set_environ("QUERY_STRING", qstr); set_environ("CONTENT_LENGTH", Sprintf("%d", request->length)->ptr); if (request->enctype == FORM_ENCTYPE_MULTIPART) { set_environ("CONTENT_TYPE", Sprintf("multipart/form-data; boundary=%s", request->boundary)->ptr); freopen(request->body, "r", stdin); } else set_environ("CONTENT_TYPE", "application/x-www-form-urlencoded"); } else { set_environ("REQUEST_METHOD", "GET"); set_environ("QUERY_STRING", qstr ? qstr : ""); freopen(DEV_NULL_PATH, "r", stdin); } #ifdef HAVE_CHDIR /* ifndef __EMX__ ? */ chdir(mydirname(file)); #endif execl(file, mybasename(file), NULL); fprintf(stderr, "execl(\"%s\", \"%s\", NULL): %s\n", file, mybasename(file), strerror(errno)); exit(1); return NULL; }