113 lines
3.0 KiB
C
113 lines
3.0 KiB
C
/*
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* This code is in the public domain; do with it what you wish.
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*
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* Written by Karel Zak <kzak@redhat.com> in Jul 2019
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*/
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#ifndef UTIL_LINUX_PTY_SESSION_H
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#define UTIL_LINUX_PTY_SESSION_H
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#include <pty.h>
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#include <termios.h>
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#include <signal.h>
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#include <sys/time.h>
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#include <sys/stat.h>
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#include <sys/signalfd.h>
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/*
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* Callbacks -- the first argument is always callback data, see
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* ul_pty_set_callback_data().
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*/
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struct ul_pty_callbacks {
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/*
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* Optional. Executed on SIGCHLD when ssi_code is EXITED, KILLED or
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* DUMPED; The callback has to call ul_pty_set_child(pty, (pid_t) -1)
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* if child is no more alive.
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*/
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void (*child_wait)(void *, pid_t);
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/*
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* Used when child_wait() undefined to informa about child status
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*/
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void (*child_die)(void *, pid_t, int);
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/*
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* Executed on SIGCHLD when ssi_status is SIGSTOP
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*/
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void (*child_sigstop)(void *, pid_t);
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/*
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* Executed in master loop before ul_pty enter poll() and in time set by
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* ul_pty_set_mainloop_time(). The callback is no used when time is not set.
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*/
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int (*mainloop)(void *);
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/*
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* Executed on master or stdin activity, arguments:
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* 2nd - file descriptor
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* 3rd - buffer with data
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* 4th - size of the data
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*/
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int (*log_stream_activity)(void *, int, char *, size_t);
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/*
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* Executed on signal, arguments:
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* 2nd - signal info
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* 3rd - NULL or signal specific data (e.g. struct winsize on SIGWINCH
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*/
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int (*log_signal)(void *, struct signalfd_siginfo *, void *);
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/*
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* Executed on SIGUSR1
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*/
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int (*flush_logs)(void *);
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};
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struct ul_pty {
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struct termios stdin_attrs; /* stdin and slave terminal runtime attributes */
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int master; /* parent side */
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int slave; /* child side */
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int sigfd; /* signalfd() */
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int poll_timeout;
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struct winsize win; /* terminal window size */
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sigset_t orgsig; /* original signal mask */
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int delivered_signal;
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struct ul_pty_callbacks callbacks;
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void *callback_data;
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pid_t child;
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struct timeval next_callback_time;
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unsigned int isterm:1, /* is stdin terminal? */
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slave_echo:1; /* keep ECHO on pty slave */
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};
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void ul_pty_init_debug(int mask);
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struct ul_pty *ul_new_pty(int is_stdin_tty);
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void ul_free_pty(struct ul_pty *pty);
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void ul_pty_slave_echo(struct ul_pty *pty, int enable);
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int ul_pty_get_delivered_signal(struct ul_pty *pty);
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void ul_pty_set_callback_data(struct ul_pty *pty, void *data);
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void ul_pty_set_child(struct ul_pty *pty, pid_t child);
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struct ul_pty_callbacks *ul_pty_get_callbacks(struct ul_pty *pty);
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int ul_pty_is_running(struct ul_pty *pty);
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int ul_pty_setup(struct ul_pty *pty);
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void ul_pty_cleanup(struct ul_pty *pty);
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int ul_pty_chownmod_slave(struct ul_pty *pty, uid_t uid, gid_t gid, mode_t mode);
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void ul_pty_init_slave(struct ul_pty *pty);
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int ul_pty_proxy_master(struct ul_pty *pty);
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void ul_pty_set_mainloop_time(struct ul_pty *pty, struct timeval *tv);
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int ul_pty_get_childfd(struct ul_pty *pty);
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void ul_pty_wait_for_child(struct ul_pty *pty);
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pid_t ul_pty_get_child(struct ul_pty *pty);
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void ul_pty_write_eof_to_child(struct ul_pty *pty);
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#endif /* UTIL_LINUX_PTY_H */
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