z/OS V1R9.0 UNIX System Services Command ... - Christian Grothoff

Limits
Portability
v Regular expression \ must be followed by / or ?
v No address allowed on this command
v No more files to edit
v No current filename
v Extra characters at end of command
v Not that many lines in buffer
v Insufficient memory
v Restricted environment
v Command too long
v Trailing address required
v Destination cannot straddle source in m and t
v No filename to substitute for %
v No alternate filename to substitute for #
v Filename too long
v Too many filenames
v Argument buffer overflow
v Incomplete shell escape command
v Regular expressions cannot be delimited by letters or digits
v No previous scanning regular expression
v No previous substitute to repeat
v Cannot escape newlines into regular expressions
v Missing [
v Badly constructed regular expression
v No remembered regular expression
v Line overflow in substitute
v Replacement pattern contains \d—cannot use in regular expression
v Replacement pattern too long
v Regular expression too complicated
v Cannot escape newline in visual
v No such set option
v String too long in option assignment
v Maximum number of lines: 65 279 (64K - 256 - 1).
v Length of longest line: 1K (1024) bytes including \r\n.
v Longest command line: 256 bytes.
v Length of filenames: 128 bytes.
v Length of string options: 64 bytes.
v Length of remembered regular expressions: 256 bytes.
v Number of map, map!, and abbreviate entries: 64 each.
v Number of saved keystrokes for . in vi: 128.
v Length of the lhs of map, map!, or abbreviate: 10 bytes.
v Max number of characters in a tag name: 30.
v Number of characters in a : escape from vi: 128.
v Requires 128K of memory plus the set option maxbuffers K of auxiliary memory.
During startup, maxbuffers is changed to reflect available memory; at least 32K
is required.
v Number of nested source files is 3.
POSIX.2 User Portability Extension, X/Open Portability Guide, UNIX systems.
vi
Chapter 2. Shell command descriptions 787