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fix #29: add a user-friendly message how to change fs.inotify.max_user_watches

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This commit is contained in:
Sergey Astanin 2016-02-04 15:36:25 +01:00
parent 7e3d36750a
commit ab2923df4d
1 changed files with 16 additions and 1 deletions
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17
src/monitor.d
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@ -1,4 +1,5 @@
import core.sys.linux.sys.inotify;
import core.stdc.errno;
import core.sys.posix.poll;
import core.sys.posix.unistd;
import std.exception, std.file, std.path, std.regex, std.stdio, std.string;
@ -69,7 +70,21 @@ struct Monitor
private void add(string dirname)
{
int wd = inotify_add_watch(fd, toStringz(dirname), mask);
if (wd == -1) throw new MonitorException("inotify_add_watch failed");
if (wd == -1) {
if (errno() == ENOSPC) {
writeln("The maximum number of inotify wathches is probably too low.");
writeln("");
writeln("To see the current max number of watches run");
writeln("");
writeln(" sysctl fs.inotify.max_user_watches");
writeln("");
writeln("To change the current max number of watches to 32768 run");
writeln("");
writeln(" sudo sysctl fs.inotify.max_user_watches=32768");
writeln("");
}
throw new MonitorException("inotify_add_watch failed");
}
wdToDirName[wd] = dirname ~ "/";
if (verbose) writeln("Monitor directory: ", dirname);
}