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users/19850: add pattern support to watch variable

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This commit is contained in:
Peter Stephenson 2015-02-11 12:52:22 +00:00
parent 0209635832
commit 638bccb1c5
3 changed files with 42 additions and 4 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2015-02-11 Peter Stephenson <p.stephenson@samsung.com>
* users/19850: Doc/Zsh/params.yo, Src/watch.c: watch variable
supports patterns for user, tty and host names.
2015-02-10 Mikael Magnusson <mikachu@gmail.com>
* 34488: Src/builtin.c: Fix use-after-free for print -zf and

14
Doc/Zsh/params.yo
View file

@ -1472,15 +1472,27 @@ vindex(watch)
vindex(WATCH)
item(tt(watch) <S> <Z> (tt(WATCH) <S>))(
An array (colon-separated list) of login/logout events to report.
If it contains the single word `tt(all)', then all login/logout events
are reported. If it contains the single word `tt(notme)', then all
events are reported as with `tt(all)' except tt($USERNAME).
An entry in this list may consist of a username,
an `tt(@)' followed by a remote hostname,
and a `tt(%)' followed by a line (tty).
and a `tt(%)' followed by a line (tty). Any of these may
be a pattern (be sure to quote this during the assignment to
tt(watch) so that it does not immediately perform file generation);
the setting of the tt(EXTENDED_GLOB) option is respected.
Any or all of these components may be present in an entry;
if a login/logout event matches all of them,
it is reported.
For example, with the tt(EXTENDED_GLOB) option set, the following:
example(watch=('^(pws|barts)'))
causes reports for activity assoicated with any user other than tt(pws)
or tt(barts).
)
vindex(WATCHFMT)
item(tt(WATCHFMT))(

27
Src/watch.c
View file

@ -372,6 +372,27 @@ watchlog2(int inout, WATCH_STRUCT_UTMP *u, char *fmt, int prnt, int fini)
return fmt;
}
/* See if the watch entry matches */
static int
watchlog_match(char *teststr, char *actual, int len)
{
int ret = 0;
Patprog pprog;
char *str = dupstring(teststr);
tokenize(str);
if ((pprog = patcompile(str, PAT_STATIC, 0))) {
queue_signals();
if (pattry(pprog, actual))
ret = 1;
unqueue_signals();
} else if (!strncmp(actual, teststr, len))
ret = 1;
return ret;
}
/* check the List for login/logouts */
/**/
@ -400,7 +421,7 @@ watchlog(int inout, WATCH_STRUCT_UTMP *u, char **w, char *fmt)
for (vv = v; *vv && *vv != '@' && *vv != '%'; vv++);
sav = *vv;
*vv = '\0';
if (strncmp(u->ut_name, v, sizeof(u->ut_name)))
if (!watchlog_match(v, u->ut_name, sizeof(u->ut_name)))
bad = 1;
*vv = sav;
v = vv;
@ -410,7 +431,7 @@ watchlog(int inout, WATCH_STRUCT_UTMP *u, char **w, char *fmt)
for (vv = ++v; *vv && *vv != '@'; vv++);
sav = *vv;
*vv = '\0';
if (strncmp(u->ut_line, v, sizeof(u->ut_line)))
if (!watchlog_match(v, u->ut_line, sizeof(u->ut_line)))
bad = 1;
*vv = sav;
v = vv;
@ -420,7 +441,7 @@ watchlog(int inout, WATCH_STRUCT_UTMP *u, char **w, char *fmt)
for (vv = ++v; *vv && *vv != '%'; vv++);
sav = *vv;
*vv = '\0';
if (strncmp(u->ut_host, v, strlen(v)))
if (!watchlog_match(v, u->ut_host, strlen(v)))
bad = 1;
*vv = sav;
v = vv;