Rich Felker
8e8ddeff7e
the fcntl syscall can return a negative value when the command is F_GETOWN, and this is not an error code but an actual value. thus we must special-case it and avoid calling __syscall_ret to set errno. this fix is better than the glibc fix (using F_GETOWN_EX) which only works on newer kernels and is more complex.
21 lines
446 B
C
21 lines
446 B
C
#include <fcntl.h>
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#include <unistd.h>
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#include <stdarg.h>
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#include "syscall.h"
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#include "libc.h"
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int fcntl(int fd, int cmd, ...)
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{
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long arg;
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va_list ap;
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va_start(ap, cmd);
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arg = va_arg(ap, long);
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va_end(ap);
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if (cmd == F_SETFL) arg |= O_LARGEFILE;
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if (cmd == F_SETLKW) return syscall_cp(SYS_fcntl, fd, cmd, arg);
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if (cmd == F_GETOWN) return __syscall(SYS_fcntl, fd, cmd, arg);
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return syscall(SYS_fcntl, fd, cmd, arg);
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}
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LFS64(fcntl);
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