mirror of
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256 lines
8 KiB
C
256 lines
8 KiB
C
/**
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* rofi
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*
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* MIT/X11 License
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* Copyright 2013-2014 Qball Cow <qball@gmpclient.org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include <config.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <X11/X.h>
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#include <unistd.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include <strings.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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#include <helper.h>
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#include "rofi.h"
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#include "history.h"
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#include "ssh-dialog.h"
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#ifdef TIMING
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#include <time.h>
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#endif
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#define SSH_CACHE_FILE "rofi-2.sshcache"
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// Used in get_ssh() when splitting lines from the user's
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// SSH config file into tokens.
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#define SSH_TOKEN_DELIM "= \t\r\n"
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static inline int execshssh ( const char *host )
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{
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/**
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* I am not happy about this code, it causes 7 mallocs and frees
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*/
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char **args = NULL;
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int argsv = 0;
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helper_parse_setup ( config.ssh_command, &args, &argsv, "{host}", host, NULL );
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GError *error = NULL;
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g_spawn_async ( NULL, args, NULL,
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G_SPAWN_SEARCH_PATH,
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NULL, NULL, NULL, &error );
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if ( error != NULL ) {
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char *msg = g_strdup_printf ( "Failed to execute: 'ssh %s'\nError: '%s'", host,
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error->message );
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error_dialog ( msg );
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g_free ( msg );
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// print error.
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g_error_free ( error );
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}
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// Free the args list.
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g_strfreev ( args );
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return 0;
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}
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// execute sub-process
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static pid_t exec_ssh ( const char *cmd )
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{
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if ( !cmd || !cmd[0] ) {
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return -1;
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}
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execshssh ( cmd );
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/**
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* This happens in non-critical time (After launching app)
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* It is allowed to be a bit slower.
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*/
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char *path = g_strdup_printf ( "%s/%s", cache_dir, SSH_CACHE_FILE );
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history_set ( path, cmd );
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g_free ( path );
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return 0;
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}
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static void delete_ssh ( const char *cmd )
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{
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if ( !cmd || !cmd[0] ) {
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return;
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}
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char *path = NULL;
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path = g_strdup_printf ( "%s/%s", cache_dir, SSH_CACHE_FILE );
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history_remove ( path, cmd );
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g_free ( path );
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}
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static int ssh_sort_func ( const void *a, const void *b )
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{
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const char *astr = *( const char * const * ) a;
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const char *bstr = *( const char * const * ) b;
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return g_utf8_collate ( astr, bstr );
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}
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static char ** get_ssh ( unsigned int *length )
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{
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unsigned int num_favorites = 0;
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char *path;
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char **retv = NULL;
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#ifdef TIMING
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struct timespec start, stop;
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clock_gettime ( CLOCK_REALTIME, &start );
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#endif
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if ( getenv ( "HOME" ) == NULL ) {
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return NULL;
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}
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path = g_strdup_printf ( "%s/%s", cache_dir, SSH_CACHE_FILE );
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retv = history_get_list ( path, length );
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g_free ( path );
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num_favorites = ( *length );
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FILE *fd = NULL;
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const char *hd = getenv ( "HOME" );
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path = g_strdup_printf ( "%s/%s", hd, ".ssh/config" );
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fd = fopen ( path, "r" );
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if ( fd != NULL ) {
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char buffer[1024];
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while ( fgets ( buffer, sizeof( buffer ), fd ) ) {
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// Each line is either empty, a comment line starting with a '#'
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// character or of the form "keyword [=] arguments", where there may
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// be multiple (possibly quoted) arguments separated by whitespace.
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// The keyword is separated from its arguments by whitespace OR by
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// optional whitespace and a '=' character.
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char *token = strtok( buffer, SSH_TOKEN_DELIM );
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// Skip empty lines and comment lines. Also skip lines where the
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// keyword is not "Host".
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if ( ! token || *token == '#' || g_ascii_strcasecmp( token, "Host" ) ) {
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continue;
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}
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// Now we know that this is a "Host" line.
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// The "Host" keyword is followed by one more host names separated
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// by whitespace; while host names may be quoted with double quotes
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// to represent host names containing spaces, we don't support this
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// (how many host names contain spaces?).
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while ( ( token = strtok( NULL, SSH_TOKEN_DELIM ) ) ) {
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// We do not want to show wildcard entries, as you cannot ssh to them.
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if ( *token == '!' || strpbrk( token, "*?" ) ) {
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continue;
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}
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// Is this host name already in the history file?
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// This is a nice little penalty, but doable? time will tell.
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// given num_favorites is max 25.
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int found = 0;
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for ( unsigned int j = 0; j < num_favorites; j++ ) {
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if ( ! g_ascii_strcasecmp ( token, retv[j] ) ) {
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found = 1;
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break;
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}
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}
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if ( found ) {
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continue;
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}
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// Add this host name to the list.
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retv = g_realloc ( retv, ( ( *length ) + 2 ) * sizeof ( char* ) );
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retv[( *length )] = g_strdup ( token );
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retv[( *length ) + 1] = NULL;
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( *length )++;
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}
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}
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fclose ( fd );
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}
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// TODO: check this is still fast enough. (takes 1ms on laptop.)
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if ( ( *length ) > num_favorites ) {
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qsort ( &retv[num_favorites], ( *length ) - num_favorites, sizeof ( char* ), ssh_sort_func );
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}
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g_free ( path );
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#ifdef TIMING
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clock_gettime ( CLOCK_REALTIME, &stop );
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if ( stop.tv_sec != start.tv_sec ) {
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stop.tv_nsec += ( stop.tv_sec - start.tv_sec ) * 1e9;
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}
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long diff = stop.tv_nsec - start.tv_nsec;
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printf ( "Time elapsed: %ld us\n", diff / 1000 );
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#endif
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return retv;
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}
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SwitcherMode ssh_switcher_dialog ( char **input, G_GNUC_UNUSED void *data )
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{
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SwitcherMode retv = MODE_EXIT;
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// act as a launcher
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unsigned int cmd_list_length = 0;
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char **cmd_list = get_ssh ( &cmd_list_length );
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if ( cmd_list == NULL ) {
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cmd_list = g_malloc_n ( 2, sizeof ( char * ) );
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cmd_list[0] = g_strdup ( "No ssh hosts found" );
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cmd_list[1] = NULL;
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}
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int shift = 0;
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int selected_line = 0;
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int mretv = menu ( cmd_list, cmd_list_length, input, "ssh:",
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NULL, &shift, token_match, NULL, &selected_line,
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config.levenshtein_sort );
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if ( mretv == MENU_NEXT ) {
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retv = NEXT_DIALOG;
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}
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else if ( mretv == MENU_PREVIOUS ) {
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retv = PREVIOUS_DIALOG;
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}
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else if ( mretv == MENU_QUICK_SWITCH ) {
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retv = selected_line;
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}
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else if ( mretv == MENU_OK && cmd_list[selected_line] != NULL ) {
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exec_ssh ( cmd_list[selected_line] );
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}
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else if ( mretv == MENU_CUSTOM_INPUT && *input != NULL && *input[0] != '\0' ) {
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exec_ssh ( *input );
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}
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else if ( mretv == MENU_ENTRY_DELETE && cmd_list[selected_line] ) {
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delete_ssh ( cmd_list[selected_line] );
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// Stay
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retv = RELOAD_DIALOG;
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}
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g_strfreev ( cmd_list );
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return retv;
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}
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