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#include <errno.h>
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#include "buffer.h"
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int buffer_stubborn(ssize_t (*op)(),int fd,const char* buf, size_t len,void* cookie) {
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int w;
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while (len) {
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if ((w=op(fd,buf,len,cookie))<0) {
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if (errno == EINTR) continue;
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return -1;
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};
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buf+=w;
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len-=w;
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}
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return 0;
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}
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