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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 19:59:03 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 19:59:03 +0000
commita848231ae0f346dc7cc000973fbeb65b0894ee92 (patch)
tree44b60b367c86723cc78383ef247885d72b388afe /src/util/file_limit.c
parentInitial commit. (diff)
downloadpostfix-a848231ae0f346dc7cc000973fbeb65b0894ee92.tar.xz
postfix-a848231ae0f346dc7cc000973fbeb65b0894ee92.zip
Adding upstream version 3.8.5.upstream/3.8.5
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/util/file_limit.c')
-rw-r--r--src/util/file_limit.c96
1 files changed, 96 insertions, 0 deletions
diff --git a/src/util/file_limit.c b/src/util/file_limit.c
new file mode 100644
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--- /dev/null
+++ b/src/util/file_limit.c
@@ -0,0 +1,96 @@
+/*++
+/* NAME
+/* file_limit 3
+/* SUMMARY
+/* limit the file size
+/* SYNOPSIS
+/* #include <iostuff.h>
+/*
+/* off_t get_file_limit()
+/*
+/* void set_file_limit(limit)
+/* off_t limit;
+/* DESCRIPTION
+/* This module manipulates the process-wide file size limit.
+/* The limit is specified in bytes.
+/*
+/* get_file_limit() looks up the process-wide file size limit.
+/*
+/* set_file_limit() sets the process-wide file size limit to
+/* \fIlimit\fR.
+/* DIAGNOSTICS
+/* All errors are fatal.
+/* SEE ALSO
+/* setrlimit(2)
+/* ulimit(2)
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* IBM T.J. Watson Research
+/* P.O. Box 704
+/* Yorktown Heights, NY 10598, USA
+/*--*/
+
+/* System library. */
+
+#include <sys_defs.h>
+#ifdef USE_ULIMIT
+#include <ulimit.h>
+#else
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <signal.h>
+#endif
+#include <limits.h>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <iostuff.h>
+
+#define ULIMIT_BLOCK_SIZE 512
+
+/* get_file_limit - get process-wide file size limit */
+
+off_t get_file_limit(void)
+{
+ off_t limit;
+
+#ifdef USE_ULIMIT
+ if ((limit = ulimit(UL_GETFSIZE, 0)) < 0)
+ msg_fatal("ulimit: %m");
+ if (limit > OFF_T_MAX / ULIMIT_BLOCK_SIZE)
+ limit = OFF_T_MAX / ULIMIT_BLOCK_SIZE;
+ return (limit * ULIMIT_BLOCK_SIZE);
+#else
+ struct rlimit rlim;
+
+ if (getrlimit(RLIMIT_FSIZE, &rlim) < 0)
+ msg_fatal("getrlimit: %m");
+ limit = rlim.rlim_cur;
+ return (limit < 0 ? OFF_T_MAX : rlim.rlim_cur);
+#endif /* USE_ULIMIT */
+}
+
+/* set_file_limit - process-wide file size limit */
+
+void set_file_limit(off_t limit)
+{
+#ifdef USE_ULIMIT
+ if (ulimit(UL_SETFSIZE, limit / ULIMIT_BLOCK_SIZE) < 0)
+ msg_fatal("ulimit: %m");
+#else
+ struct rlimit rlim;
+
+ rlim.rlim_cur = rlim.rlim_max = limit;
+ if (setrlimit(RLIMIT_FSIZE, &rlim) < 0)
+ msg_fatal("setrlimit: %m");
+#ifdef SIGXFSZ
+ if (signal(SIGXFSZ, SIG_IGN) == SIG_ERR)
+ msg_fatal("signal(SIGXFSZ,SIG_IGN): %m");
+#endif
+#endif /* USE_ULIMIT */
+}