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Use a signal-safe type for two variables that are used to synchronise

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with a signal handler. This fixes a race condition introduced by
compiler reordering that caused dump to sometimes get stuck,
especially while dumping large filesystems.
This commit is contained in:
Ian Dowse 2005-03-02 02:30:08 +00:00
parent ed9e8cc512
commit 890005bf8a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=142968
1 changed files with 2 additions and 2 deletions
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4
sbin/dump/tape.c
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@ -109,8 +109,8 @@ char (*nextblock)[TP_BSIZE];
int master; /* pid of master, for sending error signals */
int tenths; /* length of tape used per block written */
static int caught; /* have we caught the signal to proceed? */
static int ready; /* have we reached the lock point without having */
static volatile sig_atomic_t caught; /* have we caught the signal to proceed? */
static volatile sig_atomic_t ready; /* reached the lock point without having */
/* received the SIGUSR2 signal from the prev slave? */
static jmp_buf jmpbuf; /* where to jump to if we are ready when the */
/* SIGUSR2 arrives from the previous slave */