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getdtablesize − get descriptor table size |
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#include <unistd.h> int getdtablesize(void); |
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getdtablesize returns the maximum number of files a process can have open. |
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getdtablesize is implemented as a library function in DLL 4.4.1. This function returns OPEN_MAX (set to 256 in Linux 2.0.23) if OPEN_MAX was defined when the library was compiled. Otherwise, −1 is returned, and errno is set to ENOSYS. |
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SVr4, 4.4BSD (the getdtablesize function first appeared in BSD 4.2). |
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close(2), dup(2), open(2) |