37 строки
821 B
C
37 строки
821 B
C
#include <stdio.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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int main() {
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int f, f2, f3;
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printf("DUP\n");
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f = open("/", O_RDONLY);
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f2 = open("/", O_RDONLY);
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f3 = dup(f);
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printf("errno: %d\n", errno);
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printf("f: %d\n", f != f2 && f != f3);
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printf("f2,f3: %d\n", f2 != f3);
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printf("close(f1): %d\n", close(f));
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printf("close(f2): %d\n", close(f2));
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printf("close(f3): %d\n", close(f3));
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printf("\n");
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errno = 0;
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printf("DUP2\n");
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f = open("/", O_RDONLY);
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f2 = open("/", O_RDONLY);
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f3 = dup2(f, f2);
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printf("errno: %d\n", errno);
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printf("f: %d\n", f != f2 && f != f3);
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printf("f2,f3: %d\n", f2 == f3);
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printf("close(f1): %d\n", close(f));
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printf("close(f2): %d\n", close(f2));
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printf("close(f3): %d\n", close(f3));
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printf("\n");
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errno = 0;
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return 0;
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}
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