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| 6.6. Known limitations among sed versions
Limits on distributed versions, although source code for most
versions of free sed allows for modification and recompilation.
The term "no limit" when used below means there is no "fixed"
limit. Limits are actually determined by one's hardware, memory,
operating system, and which C library is used to compile sed.
6.6.1. Maximum line length
GNU sed 3.02: no limit
GNU sed 2.05: no limit
sedmod 1.0: 4096 bytes
HHsed: 4000 bytes
6.6.2. Maximum size for all buffers (pattern space + hold space)
GNU sed 3.02: no limit
GNU sed 2.05: no limit
sedmod 1.0: 4096 bytes
HHsed: 4000 bytes
6.6.3. Maximum number of files that can be read with read command
GNU sed 3.02: no limit
GNU sed 2.05: total no. of r and w commands may not exceed 32
sedmod 1.0: total no. of r and w commands may not exceed 20
6.6.4. Maximum number of files that can be written with 'w' command
GNU sed 3.02: no limit (but typical Unix is 253)
GNU sed 2.05: total no. of r and w commands may not exceed 32
sedmod 1.0: 10
HHsed: 10
6.6.5. Limits on length of label names
BSD sed: 8 characters
GNU sed 3.02: no limit
GNU sed 2.05: no limit
HHsed: no limit
6.6.6. Limits on length of write-file names
BSD sed: 40 characters
GNU sed 3.02: no limit
GNU sed 2.05: no limit
HHsed: no limit
6.6.7. Limits on branch/jump commands
HHsed: 50
As a practical consequence, this means that HHsed will not read
more than 50 lines into the pattern space via an N command, even if
the pattern space is only a few hundred bytes in size. HHsed exits
with an error message, "infinite branch loop at line {nn}". |
