mirror of
https://github.com/tmux/tmux.git
synced 2024-12-13 01:48:47 +00:00
675 lines
16 KiB
C
675 lines
16 KiB
C
/* $OpenBSD$ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <paths.h>
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#include <pwd.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <unistd.h>
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#include "tmux.h"
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#ifdef DEBUG
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const char *malloc_options = "AFGJPX";
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#endif
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volatile sig_atomic_t sigwinch;
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volatile sig_atomic_t sigterm;
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volatile sig_atomic_t sigcont;
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volatile sig_atomic_t sigchld;
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volatile sig_atomic_t sigusr1;
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volatile sig_atomic_t sigusr2;
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char *cfg_file;
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struct options global_s_options; /* session options */
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struct options global_w_options; /* window options */
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struct environ global_environ;
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int debug_level;
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int be_quiet;
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time_t start_time;
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char *socket_path;
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int login_shell;
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__dead void usage(void);
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void fill_session(struct msg_command_data *);
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char *makesockpath(const char *);
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int dispatch_imsg(struct imsgbuf *, const char *, int *);
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__dead void shell_exec(const char *, const char *);
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__dead void
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usage(void)
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{
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fprintf(stderr,
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"usage: %s [-28lquv] [-c shell-command] [-f file] [-L socket-name]\n"
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" [-S socket-path] [command [flags]]\n",
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__progname);
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exit(1);
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}
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void
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logfile(const char *name)
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{
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char *path;
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log_close();
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if (debug_level > 0) {
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xasprintf(&path, "tmux-%s-%ld.log", name, (long) getpid());
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log_open_file(debug_level, path);
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xfree(path);
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}
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}
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void
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sighandler(int sig)
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{
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int saved_errno;
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saved_errno = errno;
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switch (sig) {
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case SIGWINCH:
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sigwinch = 1;
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break;
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case SIGTERM:
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sigterm = 1;
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break;
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case SIGCHLD:
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sigchld = 1;
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break;
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case SIGCONT:
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sigcont = 1;
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break;
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case SIGUSR1:
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sigusr1 = 1;
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break;
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case SIGUSR2:
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sigusr2 = 1;
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break;
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}
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errno = saved_errno;
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}
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void
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siginit(void)
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{
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struct sigaction act;
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memset(&act, 0, sizeof act);
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sigemptyset(&act.sa_mask);
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act.sa_flags = SA_RESTART;
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act.sa_handler = SIG_IGN;
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if (sigaction(SIGPIPE, &act, NULL) != 0)
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fatal("sigaction failed");
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if (sigaction(SIGINT, &act, NULL) != 0)
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fatal("sigaction failed");
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if (sigaction(SIGTSTP, &act, NULL) != 0)
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fatal("sigaction failed");
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if (sigaction(SIGQUIT, &act, NULL) != 0)
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fatal("sigaction failed");
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act.sa_handler = sighandler;
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if (sigaction(SIGWINCH, &act, NULL) != 0)
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fatal("sigaction failed");
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if (sigaction(SIGTERM, &act, NULL) != 0)
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fatal("sigaction failed");
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if (sigaction(SIGCHLD, &act, NULL) != 0)
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fatal("sigaction failed");
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if (sigaction(SIGUSR1, &act, NULL) != 0)
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fatal("sigaction failed");
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if (sigaction(SIGUSR2, &act, NULL) != 0)
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fatal("sigaction failed");
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}
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void
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sigreset(void)
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{
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struct sigaction act;
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memset(&act, 0, sizeof act);
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sigemptyset(&act.sa_mask);
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act.sa_handler = SIG_DFL;
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if (sigaction(SIGPIPE, &act, NULL) != 0)
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fatal("sigaction failed");
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if (sigaction(SIGUSR1, &act, NULL) != 0)
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fatal("sigaction failed");
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if (sigaction(SIGUSR2, &act, NULL) != 0)
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fatal("sigaction failed");
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if (sigaction(SIGINT, &act, NULL) != 0)
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fatal("sigaction failed");
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if (sigaction(SIGTSTP, &act, NULL) != 0)
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fatal("sigaction failed");
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if (sigaction(SIGQUIT, &act, NULL) != 0)
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fatal("sigaction failed");
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if (sigaction(SIGWINCH, &act, NULL) != 0)
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fatal("sigaction failed");
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if (sigaction(SIGTERM, &act, NULL) != 0)
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fatal("sigaction failed");
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if (sigaction(SIGCHLD, &act, NULL) != 0)
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fatal("sigaction failed");
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}
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const char *
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getshell(void)
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{
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struct passwd *pw;
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const char *shell;
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shell = getenv("SHELL");
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if (checkshell(shell))
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return (shell);
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pw = getpwuid(getuid());
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if (pw != NULL && checkshell(pw->pw_shell))
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return (pw->pw_shell);
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return (_PATH_BSHELL);
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}
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int
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checkshell(const char *shell)
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{
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if (shell == NULL || *shell == '\0' || areshell(shell))
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return (0);
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if (access(shell, X_OK) != 0)
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return (0);
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return (1);
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}
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int
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areshell(const char *shell)
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{
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const char *progname, *ptr;
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if ((ptr = strrchr(shell, '/')) != NULL)
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ptr++;
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else
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ptr = shell;
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progname = __progname;
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if (*progname == '-')
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progname++;
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if (strcmp(ptr, progname) == 0)
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return (1);
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return (0);
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}
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void
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fill_session(struct msg_command_data *data)
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{
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char *env, *ptr1, *ptr2, buf[256];
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size_t len;
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const char *errstr;
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long long ll;
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data->pid = -1;
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if ((env = getenv("TMUX")) == NULL)
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return;
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if ((ptr2 = strrchr(env, ',')) == NULL || ptr2 == env)
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return;
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for (ptr1 = ptr2 - 1; ptr1 > env && *ptr1 != ','; ptr1--)
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;
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if (*ptr1 != ',')
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return;
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ptr1++;
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ptr2++;
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len = ptr2 - ptr1 - 1;
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if (len > (sizeof buf) - 1)
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return;
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memcpy(buf, ptr1, len);
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buf[len] = '\0';
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ll = strtonum(buf, 0, LONG_MAX, &errstr);
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if (errstr != NULL)
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return;
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data->pid = ll;
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ll = strtonum(ptr2, 0, UINT_MAX, &errstr);
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if (errstr != NULL)
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return;
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data->idx = ll;
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}
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char *
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makesockpath(const char *label)
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{
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char base[MAXPATHLEN], *path;
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struct stat sb;
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u_int uid;
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uid = getuid();
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xsnprintf(base, MAXPATHLEN, "%s/tmux-%d", _PATH_TMP, uid);
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if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
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return (NULL);
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if (lstat(base, &sb) != 0)
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return (NULL);
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if (!S_ISDIR(sb.st_mode)) {
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errno = ENOTDIR;
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return (NULL);
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}
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if (sb.st_uid != uid || (sb.st_mode & (S_IRWXG|S_IRWXO)) != 0) {
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errno = EACCES;
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return (NULL);
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}
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xasprintf(&path, "%s/%s", base, label);
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return (path);
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}
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int
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main(int argc, char **argv)
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{
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struct cmd_list *cmdlist;
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struct cmd *cmd;
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struct pollfd pfd;
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enum msgtype msg;
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struct passwd *pw;
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struct options *so, *wo;
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struct keylist *keylist;
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struct imsgbuf *ibuf;
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struct msg_command_data cmddata;
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char *s, *shellcmd, *path, *label, *home, *cause;
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char cwd[MAXPATHLEN], **var;
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void *buf;
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size_t len;
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int nfds, retcode, opt, flags, cmdflags = 0;
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flags = 0;
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shellcmd = label = path = NULL;
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login_shell = (**argv == '-');
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while ((opt = getopt(argc, argv, "28c:df:lL:qS:uUv")) != -1) {
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switch (opt) {
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case '2':
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flags |= IDENTIFY_256COLOURS;
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flags &= ~IDENTIFY_88COLOURS;
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break;
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case '8':
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flags |= IDENTIFY_88COLOURS;
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flags &= ~IDENTIFY_256COLOURS;
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break;
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case 'c':
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if (shellcmd != NULL)
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xfree(shellcmd);
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shellcmd = xstrdup(optarg);
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break;
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case 'f':
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if (cfg_file != NULL)
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xfree(cfg_file);
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cfg_file = xstrdup(optarg);
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break;
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case 'l':
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login_shell = 1;
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break;
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case 'L':
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if (label != NULL)
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xfree(label);
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label = xstrdup(optarg);
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break;
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case 'q':
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be_quiet = 1;
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break;
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case 'S':
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if (path != NULL)
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xfree(path);
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path = xstrdup(optarg);
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break;
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case 'u':
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flags |= IDENTIFY_UTF8;
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break;
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case 'v':
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debug_level++;
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (shellcmd != NULL && argc != 0)
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usage();
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log_open_tty(debug_level);
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siginit();
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if (!(flags & IDENTIFY_UTF8)) {
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/*
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* If the user has set whichever of LC_ALL, LC_CTYPE or LANG
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* exist (in that order) to contain UTF-8, it is a safe
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* assumption that either they are using a UTF-8 terminal, or
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* if not they know that output from UTF-8-capable programs may
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* be wrong.
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*/
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if ((s = getenv("LC_ALL")) == NULL) {
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if ((s = getenv("LC_CTYPE")) == NULL)
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s = getenv("LANG");
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}
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if (s != NULL && (strcasestr(s, "UTF-8") != NULL ||
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strcasestr(s, "UTF8") != NULL))
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flags |= IDENTIFY_UTF8;
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}
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environ_init(&global_environ);
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for (var = environ; *var != NULL; var++)
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environ_put(&global_environ, *var);
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options_init(&global_s_options, NULL);
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so = &global_s_options;
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options_set_number(so, "base-index", 0);
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options_set_number(so, "bell-action", BELL_ANY);
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options_set_number(so, "buffer-limit", 9);
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options_set_string(so, "default-command", "%s", "");
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options_set_string(so, "default-shell", "%s", getshell());
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options_set_string(so, "default-terminal", "screen");
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options_set_number(so, "display-panes-colour", 4);
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options_set_number(so, "display-panes-time", 1000);
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options_set_number(so, "display-time", 750);
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options_set_number(so, "history-limit", 2000);
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options_set_number(so, "lock-after-time", 0);
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options_set_string(so, "lock-command", "lock -np");
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options_set_number(so, "lock-server", 1);
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options_set_number(so, "message-attr", 0);
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options_set_number(so, "message-bg", 3);
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options_set_number(so, "message-fg", 0);
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options_set_number(so, "mouse-select-pane", 0);
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options_set_number(so, "repeat-time", 500);
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options_set_number(so, "set-remain-on-exit", 0);
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options_set_number(so, "set-titles", 0);
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options_set_string(so, "set-titles-string", "#S:#I:#W - \"#T\"");
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options_set_number(so, "status", 1);
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options_set_number(so, "status-attr", 0);
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options_set_number(so, "status-bg", 2);
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options_set_number(so, "status-fg", 0);
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options_set_number(so, "status-interval", 15);
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options_set_number(so, "status-justify", 0);
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options_set_number(so, "status-keys", MODEKEY_EMACS);
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options_set_string(so, "status-left", "[#S]");
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options_set_number(so, "status-left-attr", 0);
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options_set_number(so, "status-left-bg", 8);
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options_set_number(so, "status-left-fg", 8);
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options_set_number(so, "status-left-length", 10);
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options_set_string(so, "status-right", "\"#22T\" %%H:%%M %%d-%%b-%%y");
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options_set_number(so, "status-right-attr", 0);
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options_set_number(so, "status-right-bg", 8);
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options_set_number(so, "status-right-fg", 8);
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options_set_number(so, "status-right-length", 40);
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options_set_string(so, "terminal-overrides",
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"*88col*:colors=88,*256col*:colors=256");
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options_set_string(so, "update-environment", "DISPLAY "
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"WINDOWID SSH_ASKPASS SSH_AUTH_SOCK SSH_AGENT_PID SSH_CONNECTION");
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options_set_number(so, "visual-activity", 0);
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options_set_number(so, "visual-bell", 0);
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options_set_number(so, "visual-content", 0);
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keylist = xmalloc(sizeof *keylist);
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ARRAY_INIT(keylist);
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ARRAY_ADD(keylist, '\002');
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options_set_data(so, "prefix", keylist, xfree);
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options_init(&global_w_options, NULL);
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wo = &global_w_options;
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options_set_number(wo, "aggressive-resize", 0);
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options_set_number(wo, "automatic-rename", 1);
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options_set_number(wo, "clock-mode-colour", 4);
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options_set_number(wo, "clock-mode-style", 1);
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options_set_number(wo, "force-height", 0);
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options_set_number(wo, "force-width", 0);
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options_set_number(wo, "main-pane-height", 24);
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options_set_number(wo, "main-pane-width", 81);
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options_set_number(wo, "mode-attr", 0);
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options_set_number(wo, "mode-bg", 3);
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options_set_number(wo, "mode-fg", 0);
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options_set_number(wo, "mode-keys", MODEKEY_EMACS);
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options_set_number(wo, "mode-mouse", 0);
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options_set_number(wo, "monitor-activity", 0);
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options_set_string(wo, "monitor-content", "%s", "");
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options_set_number(wo, "window-status-attr", 0);
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options_set_number(wo, "window-status-bg", 8);
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options_set_number(wo, "window-status-current-attr", 0);
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options_set_number(wo, "window-status-current-bg", 8);
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options_set_number(wo, "window-status-current-fg", 8);
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options_set_number(wo, "window-status-fg", 8);
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options_set_number(wo, "xterm-keys", 0);
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options_set_number(wo, "remain-on-exit", 0);
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options_set_number(wo, "synchronize-panes", 0);
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if (flags & IDENTIFY_UTF8) {
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options_set_number(so, "status-utf8", 1);
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options_set_number(wo, "utf8", 1);
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} else {
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options_set_number(so, "status-utf8", 0);
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options_set_number(wo, "utf8", 0);
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}
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if (getcwd(cwd, sizeof cwd) == NULL) {
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pw = getpwuid(getuid());
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if (pw->pw_dir != NULL && *pw->pw_dir != '\0')
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strlcpy(cwd, pw->pw_dir, sizeof cwd);
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else
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strlcpy(cwd, "/", sizeof cwd);
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}
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options_set_string(so, "default-path", "%s", cwd);
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if (cfg_file == NULL) {
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home = getenv("HOME");
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if (home == NULL || *home == '\0') {
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pw = getpwuid(getuid());
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if (pw != NULL)
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home = pw->pw_dir;
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}
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xasprintf(&cfg_file, "%s/%s", home, DEFAULT_CFG);
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if (access(cfg_file, R_OK) != 0) {
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xfree(cfg_file);
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cfg_file = NULL;
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}
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} else {
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if (access(cfg_file, R_OK) != 0) {
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log_warn("%s", cfg_file);
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exit(1);
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}
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}
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if (label == NULL)
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label = xstrdup("default");
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if (path == NULL && (path = makesockpath(label)) == NULL) {
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log_warn("can't create socket");
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exit(1);
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}
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xfree(label);
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if (shellcmd != NULL) {
|
|
msg = MSG_SHELL;
|
|
buf = NULL;
|
|
len = 0;
|
|
} else {
|
|
fill_session(&cmddata);
|
|
|
|
cmddata.argc = argc;
|
|
if (cmd_pack_argv(
|
|
argc, argv, cmddata.argv, sizeof cmddata.argv) != 0) {
|
|
log_warnx("command too long");
|
|
exit(1);
|
|
}
|
|
|
|
msg = MSG_COMMAND;
|
|
buf = &cmddata;
|
|
len = sizeof cmddata;
|
|
}
|
|
|
|
if (shellcmd != NULL)
|
|
cmdflags |= CMD_STARTSERVER;
|
|
else if (argc == 0) /* new-session is the default */
|
|
cmdflags |= CMD_STARTSERVER|CMD_SENDENVIRON;
|
|
else {
|
|
/*
|
|
* It sucks parsing the command string twice (in client and
|
|
* later in server) but it is necessary to get the start server
|
|
* flag.
|
|
*/
|
|
if ((cmdlist = cmd_list_parse(argc, argv, &cause)) == NULL) {
|
|
log_warnx("%s", cause);
|
|
exit(1);
|
|
}
|
|
cmdflags &= ~CMD_STARTSERVER;
|
|
TAILQ_FOREACH(cmd, cmdlist, qentry) {
|
|
if (cmd->entry->flags & CMD_STARTSERVER)
|
|
cmdflags |= CMD_STARTSERVER;
|
|
if (cmd->entry->flags & CMD_SENDENVIRON)
|
|
cmdflags |= CMD_SENDENVIRON;
|
|
}
|
|
cmd_list_free(cmdlist);
|
|
}
|
|
|
|
if ((ibuf = client_init(path, cmdflags, flags)) == NULL)
|
|
exit(1);
|
|
xfree(path);
|
|
|
|
imsg_compose(ibuf, msg, PROTOCOL_VERSION, -1, -1, buf, len);
|
|
|
|
retcode = 0;
|
|
for (;;) {
|
|
pfd.fd = ibuf->fd;
|
|
pfd.events = POLLIN;
|
|
if (ibuf->w.queued != 0)
|
|
pfd.events |= POLLOUT;
|
|
|
|
if ((nfds = poll(&pfd, 1, INFTIM)) == -1) {
|
|
if (errno == EAGAIN || errno == EINTR)
|
|
continue;
|
|
fatal("poll failed");
|
|
}
|
|
if (nfds == 0)
|
|
continue;
|
|
|
|
if (pfd.revents & (POLLERR|POLLHUP|POLLNVAL))
|
|
fatalx("socket error");
|
|
|
|
if (pfd.revents & POLLIN) {
|
|
if (dispatch_imsg(ibuf, shellcmd, &retcode) != 0)
|
|
break;
|
|
}
|
|
|
|
if (pfd.revents & POLLOUT) {
|
|
if (msgbuf_write(&ibuf->w) < 0)
|
|
fatalx("msgbuf_write failed");
|
|
}
|
|
}
|
|
|
|
options_free(&global_s_options);
|
|
options_free(&global_w_options);
|
|
|
|
return (retcode);
|
|
}
|
|
|
|
int
|
|
dispatch_imsg(struct imsgbuf *ibuf, const char *shellcmd, int *retcode)
|
|
{
|
|
struct imsg imsg;
|
|
ssize_t n, datalen;
|
|
struct msg_print_data printdata;
|
|
struct msg_shell_data shelldata;
|
|
|
|
if ((n = imsg_read(ibuf)) == -1 || n == 0)
|
|
fatalx("imsg_read failed");
|
|
|
|
for (;;) {
|
|
if ((n = imsg_get(ibuf, &imsg)) == -1)
|
|
fatalx("imsg_get failed");
|
|
if (n == 0)
|
|
return (0);
|
|
datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
|
|
|
|
switch (imsg.hdr.type) {
|
|
case MSG_EXIT:
|
|
case MSG_SHUTDOWN:
|
|
if (datalen != 0)
|
|
fatalx("bad MSG_EXIT size");
|
|
|
|
return (-1);
|
|
case MSG_ERROR:
|
|
*retcode = 1;
|
|
/* FALLTHROUGH */
|
|
case MSG_PRINT:
|
|
if (datalen != sizeof printdata)
|
|
fatalx("bad MSG_PRINT size");
|
|
memcpy(&printdata, imsg.data, sizeof printdata);
|
|
printdata.msg[(sizeof printdata.msg) - 1] = '\0';
|
|
|
|
log_info("%s", printdata.msg);
|
|
break;
|
|
case MSG_READY:
|
|
if (datalen != 0)
|
|
fatalx("bad MSG_READY size");
|
|
|
|
client_main(); /* doesn't return */
|
|
case MSG_VERSION:
|
|
if (datalen != 0)
|
|
fatalx("bad MSG_VERSION size");
|
|
|
|
log_warnx("protocol version mismatch (client %u, "
|
|
"server %u)", PROTOCOL_VERSION, imsg.hdr.peerid);
|
|
*retcode = 1;
|
|
return (-1);
|
|
case MSG_SHELL:
|
|
if (datalen != sizeof shelldata)
|
|
fatalx("bad MSG_SHELL size");
|
|
memcpy(&shelldata, imsg.data, sizeof shelldata);
|
|
shelldata.shell[(sizeof shelldata.shell) - 1] = '\0';
|
|
|
|
shell_exec(shelldata.shell, shellcmd);
|
|
default:
|
|
fatalx("unexpected message");
|
|
}
|
|
|
|
imsg_free(&imsg);
|
|
}
|
|
}
|
|
|
|
__dead void
|
|
shell_exec(const char *shell, const char *shellcmd)
|
|
{
|
|
const char *shellname, *ptr;
|
|
char *argv0;
|
|
|
|
sigreset();
|
|
|
|
ptr = strrchr(shell, '/');
|
|
if (ptr != NULL && *(ptr + 1) != '\0')
|
|
shellname = ptr + 1;
|
|
else
|
|
shellname = shell;
|
|
if (login_shell)
|
|
xasprintf(&argv0, "-%s", shellname);
|
|
else
|
|
xasprintf(&argv0, "%s", shellname);
|
|
setenv("SHELL", shell, 1);
|
|
|
|
execl(shell, argv0, "-c", shellcmd, (char *) NULL);
|
|
fatal("execl failed");
|
|
}
|