Intel Binary Compatibility Standard

The Intel Binary Compatibility Standard ( iBCS ) is a standardized application binary interface (ABI) for Unix operating systems on Intel-386 -compatible computers, published by AT&T , Intel and SCO in 1988, and updated in 1990. It extends source -level standards such as POSIX and XPG3 ^[1] by standardizing various operating system interfaces, including the filesystem hierarchy layout (i.e., the locations of system files and installed programs), ^[2]^[3] so that Unix programs would run on the various vendor-specific Unix implementations for Intel hardware (such as Xenix , SCO Unix and System V implementations). ^[4] The second edition, announced in 1990, added an interface specification for VGA graphics. ^[5]

iBCS, edition 2, was supported by various Unix versions, such as UnixWare and third-party implementations. A Linux implementation was developed ca. 1994, enabling Linux to run commercial Unix applications such as WordPerfect . ^[6]^[7]

There have been several security issues in various iBCS implementations over the years. ^[8]^[9]

References [ edit ]

^ Cameron, Debra (1991). Unix standards . Computer Technology Research Corp. p. 64.
^ "/opt : Add-on application software packages" . Filesystem Hierarchy Standard . Retrieved 13 November 2014 .
^ George Kraft IV (1 November 2000). "Where to Install My Products on Linux?" . Linux Journal . Retrieved 13 November 2014 .
^ Taylor, Noel-Marie (15 June 1993). "Consensys V 4.2" . PC Magazine : 234.
^ Scott Mace (27 August 1990). "Binary Unix 386 Standard to Be Revised" . InfoWorld .
^ Strobel, Stefan; Uhl, Thomas (1994). Linux?Unleashing the Workstation in Your PC . Springer-Verlag. p. 54.
^ Youngdale, Eric (1 September 1994). "Using iBCS2 Under Linux" . Linux Journal .
^ "OpenBSD 3.3 Errata" .
^ "FreeBSD security advisory: Kernel memory disclosure via ibcs2" .

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[1] Cameron, Debra (1991). Unix standards . Computer Technology Research Corp. p. 64.

[2] "/opt : Add-on application software packages" . Filesystem Hierarchy Standard . Retrieved 13 November 2014 .

[3] George Kraft IV (1 November 2000). "Where to Install My Products on Linux?" . Linux Journal . Retrieved 13 November 2014 .

[4] Taylor, Noel-Marie (15 June 1993). "Consensys V 4.2" . PC Magazine : 234.

[5] Scott Mace (27 August 1990). "Binary Unix 386 Standard to Be Revised" . InfoWorld .

[6] Strobel, Stefan; Uhl, Thomas (1994). Linux?Unleashing the Workstation in Your PC . Springer-Verlag. p. 54.

[7] Youngdale, Eric (1 September 1994). "Using iBCS2 Under Linux" . Linux Journal .

[8] "OpenBSD 3.3 Errata" .

[9] "FreeBSD security advisory: Kernel memory disclosure via ibcs2" .

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