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author | Rich Felker <dalias@aerifal.cx> | 2011-04-20 21:05:10 -0400 |
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committer | Rich Felker <dalias@aerifal.cx> | 2011-04-20 21:05:10 -0400 |
commit | f9a6372a98cc4d1b70400b2e7238e1f9eae50558 (patch) | |
tree | 7eb3280e965e29b80d4a331980bc80c6bb7ed7e7 /src/unistd/dup2.c | |
parent | 10d7561db5d51231939fa0b42d17eaac2bff6938 (diff) | |
download | musl-f9a6372a98cc4d1b70400b2e7238e1f9eae50558.tar.gz musl-f9a6372a98cc4d1b70400b2e7238e1f9eae50558.tar.xz musl-f9a6372a98cc4d1b70400b2e7238e1f9eae50558.zip |
workaround bug in linux dup2
the linux documentation for dup2 says it can fail with EBUSY due to a race condition with open and dup in the kernel. shield applications (and the rest of libc) from this nonsense by looping until it succeeds
Diffstat (limited to 'src/unistd/dup2.c')
-rw-r--r-- | src/unistd/dup2.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/unistd/dup2.c b/src/unistd/dup2.c index 7945f853..87a0d445 100644 --- a/src/unistd/dup2.c +++ b/src/unistd/dup2.c @@ -1,7 +1,10 @@ #include <unistd.h> +#include <errno.h> #include "syscall.h" int dup2(int old, int new) { - return syscall(SYS_dup2, old, new); + int r; + while ((r=__syscall(SYS_dup2, old, new))==-EBUSY); + return __syscall_ret(r); } |