version 1, including all changes.
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perry |
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GETHOSTNAME |
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!!!GETHOSTNAME |
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NAME |
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SYNOPSIS |
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DESCRIPTION |
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RETURN VALUE |
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ERRORS |
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CONFORMING TO |
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BUGS |
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NOTES |
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SEE ALSO |
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---- |
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!!NAME |
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gethostname, sethostname - get/set host name |
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!!SYNOPSIS |
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__#include __ |
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__int gethostname(char *__''name''__, size_t__ |
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''len''__); |
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int sethostname(const char *__''name''__, size_t__ |
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''len''__);__ |
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!!DESCRIPTION |
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These functions are used to access or to change the host |
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name of the current processor. |
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!!RETURN VALUE |
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On success, zero is returned. On error, -1 is returned, and |
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''errno'' is set appropriately. |
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!!ERRORS |
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__EINVAL__ |
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''len'' is negative or, for __sethostname__, |
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''len'' is larger than the maximum allowed size, or, for |
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__gethostname__ on Linux/i386, ''len'' is smaller than |
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the actual size. (In this last case glibc 2.1 uses |
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ENAMETOOLONG.) |
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__EPERM__ |
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For __sethostname__, the caller was not the |
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superuser. |
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__EFAULT__ |
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''name'' is an invalid address. |
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!!CONFORMING TO |
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SVr4, 4.4BSD (this function first appeared in 4.2BSD). |
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POSIX.1 does not define these functions, but ISO/IEC |
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9945-1:1990 mentions them in B.4.4.1. |
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!!BUGS |
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According to the SUSv2, __gethostname__ must return |
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''len'' bytes (a truncated hostname, NUL-terminated or |
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not) when the hostname is longer. Linux/Alpha (which has a |
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system call __gethostname__) complies with this |
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requirement, but libc and glibc on Linux/i386 only return an |
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error in this case. |
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!!NOTES |
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The definition of success varies. SUSv2 defines |
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''gethostname()'' as `return possibly truncated |
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hostname', and having a small ''len'' does not cause an |
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error return. Of course it must be possible to be certain |
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that one has obtained the full hostname, and to this end |
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SUSv2 guarantees that `Host names are limited to 255 |
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bytes'. |
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!!SEE ALSO |
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getdomainname(2), setdomainname(2), |
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uname(2) |
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---- |
