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author | RincewindsHat <12514511+RincewindsHat@users.noreply.github.com> | 2023-03-05 16:03:37 +0100 |
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committer | Lorenz Kästle <lorenz.kaestle@netways.de> | 2023-09-22 15:24:26 +0200 |
commit | 0162cb2d4f7040e3b2d48095182f87ce565866a5 (patch) | |
tree | 2810709bcd208ec15a72ca942d47e565774a9408 /lib | |
parent | 7fd0e6f36d90a341e0d9b418f1cd64a3a5472a94 (diff) | |
download | monitoring-plugins-0162cb2d4f7040e3b2d48095182f87ce565866a5.tar.gz |
fixup! Rework maxfd/open_max to avoid unused variables
Diffstat (limited to 'lib')
-rw-r--r-- | lib/maxfd.c | 26 | ||||
-rw-r--r-- | lib/maxfd.h | 9 |
2 files changed, 35 insertions, 0 deletions
diff --git a/lib/maxfd.c b/lib/maxfd.c new file mode 100644 index 00000000..dcd4d3db --- /dev/null +++ b/lib/maxfd.c | |||
@@ -0,0 +1,26 @@ | |||
1 | #include "./maxfd.h" | ||
2 | #include <errno.h> | ||
3 | |||
4 | long open_max (void) { | ||
5 | long maxfd = 0L; | ||
6 | /* Try sysconf(_SC_OPEN_MAX) first, as it can be higher than OPEN_MAX. | ||
7 | * If that fails and the macro isn't defined, we fall back to an educated | ||
8 | * guess. There's no guarantee that our guess is adequate and the program | ||
9 | * will die with SIGSEGV if it isn't and the upper boundary is breached. */ | ||
10 | |||
11 | #ifdef _SC_OPEN_MAX | ||
12 | errno = 0; | ||
13 | if ((maxfd = sysconf (_SC_OPEN_MAX)) < 0) { | ||
14 | if (errno == 0) | ||
15 | maxfd = DEFAULT_MAXFD; /* it's indeterminate */ | ||
16 | else | ||
17 | die (STATE_UNKNOWN, _("sysconf error for _SC_OPEN_MAX\n")); | ||
18 | } | ||
19 | #elif defined(OPEN_MAX) | ||
20 | return OPEN_MAX | ||
21 | #else /* sysconf macro unavailable, so guess (may be wildly inaccurate) */ | ||
22 | return DEFAULT_MAXFD; | ||
23 | #endif | ||
24 | |||
25 | return(maxfd); | ||
26 | } | ||
diff --git a/lib/maxfd.h b/lib/maxfd.h new file mode 100644 index 00000000..0d734c5c --- /dev/null +++ b/lib/maxfd.h | |||
@@ -0,0 +1,9 @@ | |||
1 | #ifndef _MAXFD_ | ||
2 | #define _MAXFD_ | ||
3 | |||
4 | #define DEFAULT_MAXFD 256 /* fallback value if no max open files value is set */ | ||
5 | #define MAXFD_LIMIT 8192 /* upper limit of open files */ | ||
6 | |||
7 | long open_max (void); | ||
8 | |||
9 | #endif // _MAXFD_ | ||