| author | Rich Felker <dalias@aerifal.cx> | 2018年08月30日 00:00:22 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2018年08月30日 00:05:52 -0400 |
| commit | cd8d8309975893736fe03e10b72de9678c5784fb (patch) | |
| tree | 858d5561059f704f1837d46bc83873c2491c9fd8 /src | |
| parent | a43a7b215cf7b71d1371c63927c17bae7177aa95 (diff) | |
| download | musl-cd8d8309975893736fe03e10b72de9678c5784fb.tar.gz | |
| -rw-r--r-- | src/signal/psiginfo.c | 6 | ||||
| -rw-r--r-- | src/signal/psignal.c | 23 |
diff --git a/src/signal/psiginfo.c b/src/signal/psiginfo.c index 57be34cd..2b15982b 100644 --- a/src/signal/psiginfo.c +++ b/src/signal/psiginfo.c @@ -1,10 +1,6 @@ -#include <stdio.h> -#include <string.h> #include <signal.h> void psiginfo(const siginfo_t *si, const char *msg) { - char *s = strsignal(si->si_signo); - if (msg) fprintf(stderr, "%s: %s\n", msg, s); - else fprintf(stderr, "%s\n", s); + psignal(si->si_signo, msg); } diff --git a/src/signal/psignal.c b/src/signal/psignal.c index 02f1c760..138dbe00 100644 --- a/src/signal/psignal.c +++ b/src/signal/psignal.c @@ -1,10 +1,27 @@ -#include <stdio.h> +#include "stdio_impl.h" #include <string.h> #include <signal.h> +#include <errno.h> void psignal(int sig, const char *msg) { + FILE *f = stderr; char *s = strsignal(sig); - if (msg) fprintf(stderr, "%s: %s\n", msg, s); - else fprintf(stderr, "%s\n", s); + + FLOCK(f); + + /* Save stderr's orientation and encoding rule, since psignal is not + * permitted to change them. Save errno and restore it if there is no + * error since fprintf might change it even on success but psignal is + * not permitted to do so. */ + void *old_locale = f->locale; + int old_mode = f->mode; + int old_errno = errno; + + if (fprintf(f, "%s%s%s\n", msg?msg:"", msg?": ":"", s)>=0) + errno = old_errno; + f->mode = old_mode; + f->locale = old_locale; + + FUNLOCK(f); } |