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Fix tmux detached detection

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The old code failed if the session had a custom name instead of the
default numeric id. To be safe in both cases, look for the session_id in
the tmux list-sessions output.
This commit is contained in:
Michael Kaiser 2017-03-10 18:07:56 +01:00
parent f2c116feb3
commit febc725763
1 changed files with 13 additions and 19 deletions
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30
src/term_mplex.c
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@ -214,8 +214,8 @@ static int detect_tmux ()
if (!pos) if (!pos)
return 0; return 0;
/* store the session number string for later use */ /* store the session id for later use */
snprintf (mplex_data, sizeof(mplex_data), "%s", pos + 1); snprintf (mplex_data, sizeof(mplex_data), "$%s", pos + 1);
mplex = MPLEX_TMUX; mplex = MPLEX_TMUX;
return 1; return 1;
} }
@ -252,13 +252,7 @@ static int gnu_screen_is_detached ()
} }
/* Detects tmux attached/detached by getting session data and finding the /* Detects tmux attached/detached by getting session data and finding the
current session's entry. An attached entry ends with "(attached)". Example: current session's entry.
$ tmux list-sessions
0: 1 windows (created Mon Mar 2 21:48:29 2015) [80x23] (attached)
1: 2 windows (created Mon Mar 2 21:48:43 2015) [80x23]
In this example, session 0 is attached and session 1 is detached.
*/ */
static int tmux_is_detached () static int tmux_is_detached ()
{ {
@ -267,10 +261,12 @@ static int tmux_is_detached ()
FILE *session_info_stream = NULL; FILE *session_info_stream = NULL;
char *dyn_buffer = NULL, *search_str = NULL; char *dyn_buffer = NULL, *search_str = NULL;
char *entry_pos, *nl_pos, *attached_pos; char *entry_pos;
int detached;
const int numstr_len = strlen (mplex_data); const int numstr_len = strlen (mplex_data);
session_info_stream = popen ("env LC_ALL=C tmux list-sessions", "r"); /* get the number of attached clients for each session */
session_info_stream = popen ("tmux list-sessions -F \"#{session_id} #{session_attached}\"", "r");
if (!session_info_stream) if (!session_info_stream)
goto fail; goto fail;
@ -284,13 +280,12 @@ static int tmux_is_detached ()
session_info_stream = NULL; session_info_stream = NULL;
/* prepare search string, for finding the current session's entry */ /* prepare search string, for finding the current session's entry */
search_str = (char *) malloc (numstr_len + 4); search_str = (char *) malloc (numstr_len + 2);
search_str[0] = '\n'; search_str[0] = '\n';
strcpy (search_str + 1, mplex_data); strcpy (search_str + 1, mplex_data);
strcat (search_str, ": ");
/* do the search */ /* do the search */
if (strncmp (dyn_buffer, search_str + 1, numstr_len + 2) == 0) if (strncmp (dyn_buffer, search_str + 1, numstr_len) == 0)
entry_pos = dyn_buffer; entry_pos = dyn_buffer;
else else
entry_pos = strstr (dyn_buffer, search_str); entry_pos = strstr (dyn_buffer, search_str);
@ -298,9 +293,8 @@ static int tmux_is_detached ()
if (! entry_pos) if (! entry_pos)
goto fail; goto fail;
/* find the next \n and look for the "(attached)" before it */ entry_pos = strchr (entry_pos, ' ') + 1;
nl_pos = strchr (entry_pos + 1, '\n'); detached = strncmp (entry_pos, "0\n", 2) == 0;
attached_pos = strstr (entry_pos + 1, "(attached)\n");
free (search_str); free (search_str);
search_str = NULL; search_str = NULL;
@ -308,7 +302,7 @@ static int tmux_is_detached ()
free (dyn_buffer); free (dyn_buffer);
dyn_buffer = NULL; dyn_buffer = NULL;
return attached_pos == NULL || attached_pos > nl_pos; return detached;
fail: fail: