414 lines
9.2 KiB
C
414 lines
9.2 KiB
C
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/* $Id: tmux.c,v 1.2 2012/05/31 19:14:56 martin Exp $ */
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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 <event.h>
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#include <fcntl.h>
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#include <pwd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "tmux.h"
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#if defined(DEBUG) && defined(__OpenBSD__)
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extern char *malloc_options;
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#endif
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struct options global_options; /* server options */
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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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struct event_base *ev_base;
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char *cfg_file;
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char *shell_cmd;
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int debug_level;
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time_t start_time;
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char socket_path[MAXPATHLEN];
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int login_shell;
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char *environ_path;
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pid_t environ_pid = -1;
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int environ_idx = -1;
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__dead void usage(void);
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void parseenvironment(void);
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char *makesocketpath(const char *);
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#ifndef HAVE___PROGNAME
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char *__progname = (char *) "tmux";
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#endif
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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 [-28lquvV] [-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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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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parseenvironment(void)
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{
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char *env, path[256];
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long pid;
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int idx;
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if ((env = getenv("TMUX")) == NULL)
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return;
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if (sscanf(env, "%255[^,],%ld,%d", path, &pid, &idx) != 3)
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return;
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environ_path = xstrdup(path);
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environ_pid = pid;
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environ_idx = idx;
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}
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char *
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makesocketpath(const char *label)
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{
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char base[MAXPATHLEN], *path, *s;
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struct stat sb;
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u_int uid;
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uid = getuid();
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if ((s = getenv("TMPDIR")) == NULL || *s == '\0')
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xsnprintf(base, sizeof base, "%s/tmux-%u", _PATH_TMP, uid);
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else
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xsnprintf(base, sizeof base, "%s/tmux-%u", s, 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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void
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setblocking(int fd, int state)
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{
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int mode;
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if ((mode = fcntl(fd, F_GETFL)) != -1) {
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if (!state)
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mode |= O_NONBLOCK;
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else
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mode &= ~O_NONBLOCK;
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fcntl(fd, F_SETFL, mode);
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}
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}
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__dead void
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shell_exec(const char *shell, const char *shellcmd)
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{
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const char *shellname, *ptr;
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char *argv0;
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ptr = strrchr(shell, '/');
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if (ptr != NULL && *(ptr + 1) != '\0')
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shellname = ptr + 1;
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else
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shellname = shell;
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if (login_shell)
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xasprintf(&argv0, "-%s", shellname);
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else
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xasprintf(&argv0, "%s", shellname);
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setenv("SHELL", shell, 1);
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setblocking(STDIN_FILENO, 1);
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setblocking(STDOUT_FILENO, 1);
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setblocking(STDERR_FILENO, 1);
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closefrom(STDERR_FILENO + 1);
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execl(shell, argv0, "-c", shellcmd, (char *) NULL);
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fatal("execl failed");
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}
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static void
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init_std_fds(void)
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{
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int fd;
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/*
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* Make sure the standard file descriptors are populated, so we
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* don't end up forwarding (for example) the event descriptor
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* instead of stdin to the server.
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*/
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while ((fd = open("/dev/null", O_RDWR)) <= 2)
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;
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close(fd);
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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 passwd *pw;
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struct keylist *keylist;
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char *s, *path, *label, *home, **var;
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int opt, flags, quiet, keys;
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#if defined(DEBUG) && defined(__OpenBSD__)
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malloc_options = (char *) "AFGJPX";
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#endif
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quiet = flags = 0;
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label = path = NULL;
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login_shell = (**argv == '-');
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while ((opt = getopt(argc, argv, "28c:df:lL:qS:uUvV")) != -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 (shell_cmd != NULL)
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xfree(shell_cmd);
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shell_cmd = xstrdup(optarg);
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break;
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case 'V':
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printf("%s %s\n", __progname, VERSION);
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exit(0);
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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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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 (shell_cmd != NULL && argc != 0)
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usage();
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init_std_fds();
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log_open_tty(debug_level);
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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_options, NULL);
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options_table_populate_tree(server_options_table, &global_options);
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options_set_number(&global_options, "quiet", quiet);
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options_init(&global_s_options, NULL);
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options_table_populate_tree(session_options_table, &global_s_options);
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options_set_string(&global_s_options, "default-shell", "%s", getshell());
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options_init(&global_w_options, NULL);
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options_table_populate_tree(window_options_table, &global_w_options);
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/* Set the prefix option (its a list, so not in the table). */
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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(&global_s_options, "prefix", keylist, xfree);
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/* Enable UTF-8 if the first client is on UTF-8 terminal. */
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if (flags & IDENTIFY_UTF8) {
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options_set_number(&global_s_options, "status-utf8", 1);
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options_set_number(&global_s_options, "mouse-utf8", 1);
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options_set_number(&global_w_options, "utf8", 1);
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}
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/* Override keys to vi if VISUAL or EDITOR are set. */
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if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
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if (strrchr(s, '/') != NULL)
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s = strrchr(s, '/') + 1;
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if (strstr(s, "vi") != NULL)
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keys = MODEKEY_VI;
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else
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keys = MODEKEY_EMACS;
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options_set_number(&global_s_options, "status-keys", keys);
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options_set_number(&global_w_options, "mode-keys", keys);
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}
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/* Locate the configuration file. */
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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 && errno == ENOENT) {
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xfree(cfg_file);
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cfg_file = NULL;
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}
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}
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/*
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* Figure out the socket path. If specified on the command-line with -S
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* or -L, use it, otherwise try $TMUX or assume -L default.
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*/
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parseenvironment();
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if (path == NULL) {
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/* If no -L, use the environment. */
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if (label == NULL) {
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if (environ_path != NULL)
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path = xstrdup(environ_path);
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else
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label = xstrdup("default");
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}
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/* -L or default set. */
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if (label != NULL) {
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||
|
|
if ((path = makesocketpath(label)) == NULL) {
|
||
|
|
log_warn("can't create socket");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (label != NULL)
|
||
|
|
xfree(label);
|
||
|
|
if (realpath(path, socket_path) == NULL)
|
||
|
|
strlcpy(socket_path, path, sizeof socket_path);
|
||
|
|
xfree(path);
|
||
|
|
|
||
|
|
#ifdef HAVE_SETPROCTITLE
|
||
|
|
/* Set process title. */
|
||
|
|
setproctitle("%s (%s)", __progname, socket_path);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Pass control to the client. */
|
||
|
|
ev_base = osdep_event_init();
|
||
|
|
exit(client_main(argc, argv, flags));
|
||
|
|
}
|