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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2016-06-03 11:29:20 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2016-06-03 11:29:20 -0400 |
| commit | ec5622351208989620b6563b7890922e28e65e7b (patch) | |
| tree | 4ab68b0c920e2b5b0c802cfc6d77d31659dd7afa /src | |
| parent | 404429038896d914f38e1ee80d6d6905be0ad261 (diff) | |
| download | postgresql-ec5622351208989620b6563b7890922e28e65e7b.tar.gz postgresql-ec5622351208989620b6563b7890922e28e65e7b.zip | |
Suppress -Wunused-result warnings about write(), again.
Adopt the same solution as in commit aa90e148ca70a235, but this time
let's put the ugliness inside the write_stderr() macro, instead of
expecting each call site to deal with it. Back-port that decision
into psql/common.c where I got the macro from in the first place.
Per gripe from Peter Eisentraut.
Diffstat (limited to 'src')
| -rw-r--r-- | src/bin/pg_dump/parallel.c | 14 | ||||
| -rw-r--r-- | src/bin/psql/common.c | 26 |
2 files changed, 27 insertions, 13 deletions
diff --git a/src/bin/pg_dump/parallel.c b/src/bin/pg_dump/parallel.c index 03bf732f645..51a8eee369d 100644 --- a/src/bin/pg_dump/parallel.c +++ b/src/bin/pg_dump/parallel.c @@ -136,8 +136,18 @@ static volatile DumpSignalInformation signal_info; static CRITICAL_SECTION signal_info_lock; #endif -/* Used from signal handlers, no buffering */ -#define write_stderr(str) write(fileno(stderr), str, strlen(str)) +/* + * Write a simple string to stderr --- must be safe in a signal handler. + * We ignore the write() result since there's not much we could do about it. + * Certain compilers make that harder than it ought to be. + */ +#define write_stderr(str) \ + do { \ + const char *str_ = (str); \ + int rc_; \ + rc_ = write(fileno(stderr), str_, strlen(str_)); \ + (void) rc_; \ + } while (0) #ifdef WIN32 diff --git a/src/bin/psql/common.c b/src/bin/psql/common.c index a287eeee195..39c88fce7de 100644 --- a/src/bin/psql/common.c +++ b/src/bin/psql/common.c @@ -175,8 +175,18 @@ static PGcancel *volatile cancelConn = NULL; static CRITICAL_SECTION cancelConnLock; #endif -/* Used from signal handlers, no buffering */ -#define write_stderr(str) write(fileno(stderr), str, strlen(str)) +/* + * Write a simple string to stderr --- must be safe in a signal handler. + * We ignore the write() result since there's not much we could do about it. + * Certain compilers make that harder than it ought to be. + */ +#define write_stderr(str) \ + do { \ + const char *str_ = (str); \ + int rc_; \ + rc_ = write(fileno(stderr), str_, strlen(str_)); \ + (void) rc_; \ + } while (0) #ifndef WIN32 @@ -185,7 +195,6 @@ static void handle_sigint(SIGNAL_ARGS) { int save_errno = errno; - int rc; char errbuf[256]; /* if we are waiting for input, longjmp out of it */ @@ -202,16 +211,11 @@ handle_sigint(SIGNAL_ARGS) if (cancelConn != NULL) { if (PQcancel(cancelConn, errbuf, sizeof(errbuf))) - { - rc = write_stderr("Cancel request sent\n"); - (void) rc; /* ignore errors, nothing we can do here */ - } + write_stderr("Cancel request sent\n"); else { - rc = write_stderr("Could not send cancel request: "); - (void) rc; /* ignore errors, nothing we can do here */ - rc = write_stderr(errbuf); - (void) rc; /* ignore errors, nothing we can do here */ + write_stderr("Could not send cancel request: "); + write_stderr(errbuf); } } |