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authorBjörn-Egil Dahlberg <[email protected]>2015-01-13 15:21:20 +0100
committerBjörn-Egil Dahlberg <[email protected]>2015-01-23 15:08:23 +0100
commit5f036bc287f325b3367f8437997534c44812078f (patch)
tree34f0e86bab29466821174534ba9ac30f5f5df90f /erts/emulator/sys
parent86d605807356f79f3484c36cba632ff88d4e2417 (diff)
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erts: Reserve a file descriptor for the crashdump file
Diffstat (limited to 'erts/emulator/sys')
-rw-r--r--erts/emulator/sys/unix/sys.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/erts/emulator/sys/unix/sys.c b/erts/emulator/sys/unix/sys.c
index 24f229ae68..eff64b2c11 100644
--- a/erts/emulator/sys/unix/sys.c
+++ b/erts/emulator/sys/unix/sys.c
@@ -244,6 +244,8 @@ static void note_child_death(int, int);
static void* child_waiter(void *);
#endif
+static int crashdump_companion_cube_fd = -1;
+
/********************* General functions ****************************/
/* This is used by both the drivers and general I/O, must be set early */
@@ -573,6 +575,14 @@ erts_sys_pre_init(void)
close(fd);
}
+ /* We need a file descriptor to close in the crashdump creation.
+ * We close this one to be sure we can get a fd for our real file ...
+ * so, we create one here ... a stone to carry all the way home.
+ */
+
+ crashdump_companion_cube_fd = open("/dev/null", O_RDONLY);
+
+ /* don't lose it, there will be cake */
}
void
@@ -760,7 +770,8 @@ prepare_crash_dump(int secs)
heart_port->common.id, list, NULL);
}
- /* FIXME: Reserve one file descriptor */
+ /* Make sure we have a fd for our crashdump file. */
+ close(crashdump_companion_cube_fd);
envsz = sizeof(env);
i = erts_sys_getenv__("ERL_CRASH_DUMP_NICE", env, &envsz);