Alin Năstac wrote:
I remember that one time I had to split a command like dohtml "${S}"/something/*.{png,html} because the line was too long. At that time, bash had a limit of 32K. Now is what ... 1M?
from execve(2): Limits on size of arguments and environmentMost Unix implementations impose some limit on the total size of the command-line argument (argv) and environment (envp) strings that may be passed to a new program. POSIX.1 allows an implementation to advertise this limit using the ARG_MAX constant (either defined in <limits.h> or available at run time using the call sysconf(_SC_ARG_MAX)).
On Linux prior to kernel 2.6.23, the memory used to store the environment and argument strings was limited to 32 pages (defined by the kernel constant MAX_ARG_PAGES). On architectures with a 4-kB page size, this yields a maximum size of 128 kB.
On kernel 2.6.23 and later, most architectures support a size limit derived from the soft RLIMIT_STACK resource limit (see getrlimit(2)). For these architectures, the total size is limited to 1/4 of the allowed stack size, the limit per string is 32 pages (the kernel constant MAX_ARG_STRLEN), and the maximum number of strings is 0x7FFFFFFF. (This change allows programs to have a much larger argument and/or environment list. Imposing the 1/4-limit ensures that the new program always has some stack space.) Architectures with no memory management unit are excepted: they maintain the limit that was in effect before kernel 2.6.23.
Cheers, -jkt -- cd /local/pub && more beer > /dev/mouth
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