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Commit | Line | Data |
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e5fd101c PS |
1 | autofs-5.0.4 - allow the automount daemon to dump core |
2 | ||
3 | From: Jeff Moyer <jmoyer@redhat.com> | |
4 | ||
5 | Right now, the automount daemon blocks all signals. We should at least | |
6 | unblock those that will cause us to dump core. Otherwise, I think the | |
7 | behaviour could be, umm, interesting. | |
8 | ||
9 | I tested this by sending SIGBUS and SIGSEGV to the automount daemon. | |
10 | ||
11 | edit - raven | |
12 | - I changed this a little so that the change to the signals is | |
13 | done in one place and added SIGABRT and SIGTRAP to the list | |
14 | of signals that aren't blocked. | |
15 | ||
16 | Signed-off-by: Jeff Moyer <jmoyer@redhat.com> | |
17 | --- | |
18 | ||
19 | CHANGELOG | 1 + | |
20 | daemon/automount.c | 16 ++++++++++++---- | |
21 | 2 files changed, 13 insertions(+), 4 deletions(-) | |
22 | ||
23 | ||
24 | diff --git a/CHANGELOG b/CHANGELOG | |
25 | index 7f27f5e..4b85649 100644 | |
26 | --- a/CHANGELOG | |
27 | +++ b/CHANGELOG | |
28 | @@ -57,6 +57,7 @@ | |
29 | - mannual umount recovery fixes. | |
30 | - fix map type info parse error. | |
31 | - fix an RPC fd leak. | |
32 | +- don't block signals we expect to dump core. | |
33 | ||
34 | 4/11/2008 autofs-5.0.4 | |
35 | ----------------------- | |
36 | diff --git a/daemon/automount.c b/daemon/automount.c | |
37 | index 44dcdd6..e7f801b 100644 | |
38 | --- a/daemon/automount.c | |
39 | +++ b/daemon/automount.c | |
40 | @@ -64,6 +64,8 @@ static int st_stat = 1; | |
41 | static int *pst_stat = &st_stat; | |
42 | static pthread_t state_mach_thid; | |
43 | ||
44 | +static sigset_t block_sigs; | |
45 | + | |
46 | /* Pre-calculated kernel packet length */ | |
47 | static size_t kpkt_len; | |
48 | ||
49 | @@ -1321,7 +1323,7 @@ static void *statemachine(void *arg) | |
50 | sigset_t signalset; | |
51 | int sig; | |
52 | ||
53 | - sigfillset(&signalset); | |
54 | + memcpy(&signalset, &block_sigs, sizeof(signalset)); | |
55 | sigdelset(&signalset, SIGCHLD); | |
56 | sigdelset(&signalset, SIGCONT); | |
57 | ||
58 | @@ -1817,7 +1819,6 @@ int main(int argc, char *argv[]) | |
59 | unsigned foreground, have_global_options; | |
60 | time_t timeout; | |
61 | time_t age = time(NULL); | |
62 | - sigset_t allsigs; | |
63 | struct rlimit rlim; | |
64 | static const struct option long_options[] = { | |
65 | {"help", 0, 0, 'h'}, | |
66 | @@ -1837,8 +1838,15 @@ int main(int argc, char *argv[]) | |
67 | {0, 0, 0, 0} | |
68 | }; | |
69 | ||
70 | - sigfillset(&allsigs); | |
71 | - sigprocmask(SIG_BLOCK, &allsigs, NULL); | |
72 | + sigfillset(&block_sigs); | |
73 | + /* allow for the dropping of core files */ | |
74 | + sigdelset(&block_sigs, SIGABRT); | |
75 | + sigdelset(&block_sigs, SIGBUS); | |
76 | + sigdelset(&block_sigs, SIGSEGV); | |
77 | + sigdelset(&block_sigs, SIGILL); | |
78 | + sigdelset(&block_sigs, SIGFPE); | |
79 | + sigdelset(&block_sigs, SIGTRAP); | |
80 | + sigprocmask(SIG_BLOCK, &block_sigs, NULL); | |
81 | ||
82 | program = argv[0]; | |
83 |