244 lines
8.3 KiB
C
244 lines
8.3 KiB
C
/****************************************************************************
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* scream::scream.h
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* routines to connect to screen and or scream daemons.
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* BSD Licence applies.
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* 2002/04/19 Azundris incept
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***************************************************************************/
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#define NS_DK 0
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#define NS_SSH 1
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#define NS_LCL 2
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#define NS_SU 3
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#define NS_MODE_NEGOTIATE -1
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#define NS_MODE_NONE 0
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#define NS_MODE_SCREEN 1
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#define NS_MODE_SCREAM 2
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#define NS_SUCC (-1)
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#define NS_FAIL 0
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#define NS_OOM 1
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#define NS_MALFORMED_URL 2
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#define NS_UNKNOWN_USER 3
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#define NS_INVALID_SESS 4
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#define NS_UNKNOWN_PROTO 5
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#define NS_CANT_RESOLVE 6
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#define NS_CANT_CONNECT 7
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#define NS_CANT_LOGIN 8
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#define NS_CANT_ATTACH 9
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#define NS_UNKNOWN_LOC 10
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#define NS_SCREEN_STATUS 11
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#define NS_SCREEN_ST_CLR 12
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#define NS_EFUN_NOT_SET 13
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#define NS_USER_CXL 14
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#define NS_NOT_ALLOWED 15
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#define NS_ERR_WEIRDSCREEN 1
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#define NS_SCREAM_CURR 1
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#define NS_SCREAM_PRVS 2
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#define NS_SCREAM_UTMP 4
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#define NS_SCREAM_BELL 8
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#define NS_SCREAM_ACT 16
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#define NS_SCREAM_FILE 32
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#define NS_SCREAM_SHARED 64
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#define NS_SCREAM_ZOMBIE 128
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#define NS_SCREAM_MASK (~(NS_SCREAM_UTMP|NS_SCREAM_PRVS))
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#define NS_HOP_DOWN 0
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#define NS_HOP_UP 1
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#define NS_ESC_CMDLINE 1
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#define NS_ESC_SYSSCREENRC 2
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#define NS_ESC_SCREENRC 3
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#define NS_ESC_INTERACTIVE 4
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/***************************************************************************/
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typedef struct __ns_hop {
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int localport;
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char *fw;
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int fwport;
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int established;
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int delay;
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int refcount;
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struct __ns_sess *sess; /* first only, others have same host/port */
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struct __ns_hop *next;
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} _ns_hop;
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typedef struct __ns_sess { /* a whole screen-session with many clients */
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int where; /* local/remote */
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int backend; /* screen/scream */
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int nesting; /* 0=topLevel, 1=screen within a screen etc */
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time_t timestamp; /* last updated when? see NS_SCREEN_UPD_FREQ */
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char *proto; /* protocol. usually "screen" */
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char *host; /* host. numeric or symbolic. ("localhost") */
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int port; /* port. usually TCP22: SSH */
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char *user; /* user. often current local user */
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char *pass; /* password. used for su. for remote sessions, a
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ssh-key should be on the remote machine. */
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char *rsrc; /* add'l parameter to screen/scream. URL-enc */
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char *home; /* user's home dir. so we can find .screenrc */
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char *sysrc; /* global screen config */
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void *userdef; /* the term-app can store a pointer here */
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int fd; /* fd for communication */
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char escape,literal; /* talking to screen: defaults to ^A, a */
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int escdef; /* where was the escape sequence defined? */
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int delay; /* initialization delay */
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int dsbb; /* default length of scroll-back buffer */
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struct __ns_efuns *efuns; /* callbacks into the terminal program. */
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struct __ns_hop *hop; /* tunnel, if any */
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struct __ns_disp *dsps; /* first display (that with the lowest index) */
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struct __ns_disp *curr; /* current display (NULL for none) */
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struct __ns_sess *prvs; /* previous session in session list */
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struct __ns_sess *next; /* next session in session list */
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} _ns_sess;
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typedef struct __ns_disp { /* describing the window of a single client */
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int index; /* index 0..n */
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char *name; /* arbitrary \0-terminated string. humans only. */
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int sbb; /* scroll-back buffer. 0 if parent to more screens */
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int x; /* rsvd */
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int y; /* rsvd */
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int w; /* rsvd */
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int h; /* rsvd */
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int flags; /* current, activity, logging, ... */
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struct __ns_sess *sess; /* is child of... (always) */
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struct __ns_sess *child; /* if parent of... (rarely) */
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struct __ns_efuns *efuns; /* NULL to use its parent's efuns */
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struct __ns_disp *prvs; /* left neighbour (<index) of this session */
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struct __ns_disp *next; /* right neighbour (>index) of this session */
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} _ns_disp;
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typedef struct __ns_efuns { /* callbacks into the terminal program */
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int refcount; /* use calls below to set this up */
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int (*set_scroll_x)(void *,int);
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int (*set_scroll_y)(void *,int);
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int (*set_scroll_w)(void *,int);
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int (*set_scroll_h)(void *,int);
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int (*redraw)(void *);
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int (*redraw_xywh)(void *,int,int,int,int);
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int (*ins_disp)(void *,int,char *);
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int (*del_disp)(void *,int);
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int (*upd_disp)(void *,int,int,char *);
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int (*err_msg)(void *,int,char *);
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int (*execute)(void *,char **);
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int (*inp_text)(void *,int,char *);
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int (*inp_dial)(void *,char *,int,char **,int (*)(void *,char *,size_t,size_t));
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int (*inp_tab)(void *,char *[],int,char *,size_t,size_t);
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int (*waitstate)(void *,int);
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} _ns_efuns;
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typedef struct __ns_parse {
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int screen;
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int real;
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int flags;
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char *name;
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} _ns_parse;
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/***************************************************************************/
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/* constructors/destructors */
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_ns_efuns *ns_new_efuns(void);
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_ns_efuns *ns_dst_efuns(_ns_efuns **);
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_ns_efuns *ns_get_efuns(_ns_sess *,_ns_disp *);
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/* debug */
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void ns_desc_string(char *,char *);
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void ns_desc_hop(_ns_hop *,char *);
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void ns_desc_sess(_ns_sess *,char *);
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/* convenience */
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_ns_disp *disp_fetch_or_make(_ns_sess *,int);
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/* transparent attach/detach */
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_ns_sess *ns_attach_by_sess(_ns_sess **,int *);
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_ns_sess *ns_attach_by_URL(char *,char *,_ns_efuns **,int *,void *);
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/* send command to screen */
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int ns_screen_command(_ns_sess *, char *);
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/* send statement to screen (prefixing it with the session's ^A: equiv) */
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int ns_screen_xcommand(_ns_sess *,char , char *);
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/* parse and forward a screen-statement (from ^A: input or screenrc) */
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int ns_parse_screen_cmd(_ns_sess *,char *,int);
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/* parse and forward a screen-hotkey */
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int ns_parse_screen_key(_ns_sess *,char);
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/* parse and forward a string */
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int ns_parse_screen_interactive(_ns_sess *, char *);
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/* parse screen escape setup */
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char ns_parse_esc(char **);
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/* init session (read .screenrc, or whatnot) */
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int ns_sess_init(_ns_sess *);
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/* what the terminal should call the last line -- screen's "hardstatus"
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changes. submit session, terminal-width, and a pointer to said line. */
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int ns_parse_screen(_ns_sess *,int,int,char *);
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/* things the term might ask screen/scream to do ***************************/
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int ns_scroll2x(_ns_sess *,int);
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int ns_scroll2y(_ns_sess *,int);
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int ns_go2_disp(_ns_sess *,int);
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int ns_add_disp(_ns_sess *,int,char *);
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int ns_rsz_disp(_ns_sess *,int,int,int);
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int ns_rem_disp(_ns_sess *,int);
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int ns_ren_disp(_ns_sess *,int,char *);
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int ns_log_disp(_ns_sess *,int,char *);
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int ns_upd_stat(_ns_sess *);
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int ns_inp_dial(_ns_sess *,char *,int,char **,int (*)(void *,char *,size_t,size_t));
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/* register efuns (callbacks) **********************************************/
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void ns_register_ssx(_ns_efuns *,int (*set_scroll_x)(void *,int));
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void ns_register_ssy(_ns_efuns *,int (*set_scroll_y)(void *,int));
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void ns_register_ssw(_ns_efuns *,int (*set_scroll_w)(void *,int));
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void ns_register_ssh(_ns_efuns *,int (*set_scroll_h)(void *,int));
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void ns_register_red(_ns_efuns *,int (*redraw)(void *));
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void ns_register_rda(_ns_efuns *,int (*redraw_xywh)(void *,int,int,int,int));
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void ns_register_ins(_ns_efuns *,int (*ins_disp)(void *,int,char *));
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void ns_register_del(_ns_efuns *,int (*del_disp)(void *,int));
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void ns_register_upd(_ns_efuns *,int (*upd_disp)(void *,int,int,char *));
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void ns_register_err(_ns_efuns *,int (*err_msg)(void *,int,char *));
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void ns_register_exe(_ns_efuns *,int (*execute)(void *,char **));
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void ns_register_txt(_ns_efuns *,int (*inp_text)(void *,int,char *));
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void ns_register_inp(_ns_efuns *,int (*)(void *,char *,int,char **,int (*)(void *,char *,size_t,size_t)));
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void ns_register_tab(_ns_efuns *,int (*)(void *,char *[],int,char *,size_t,size_t));
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void ns_register_fun(_ns_efuns *,int (*)(void *,int));
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/***************************************************************************/
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