11-06-2008
Question about the system() function in C
Hello all !
Could someone throw some light on whether there's a limit to the number of characters contained in the command string that is passed to the system() call in C.
Is it OS dependent? If yes, what are the limits for each?
Thanks.
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chfsets(8) System Manager's Manual chfsets(8)
NAME
chfsets - Changes limits for fileset quotas
SYNOPSIS
/sbin/chfsets [-F limit] [-f limit] [-B limit] [-b limit] domain [fileset...]
OPTIONS
Specifies the file usage soft limit (quota) of the fileset. Specifies the file usage hard limit (quota) of the fileset. Specifies the
block usage soft limit (quota) in 1K blocks of the fileset. Specifies the block usage hard limit (quota) in 1K blocks of the fileset.
OPERANDS
Specifies the name of the file domain. Specifies the name of one or more filesets.
DESCRIPTION
The chfsets command enables you to change fileset quotas (file usage limits and block usage limits) of any AdvFS fileset.
Filesets can have both soft and hard disk storage and file limits. When a hard limit is reached, no more disk space allocations or file
creations which would exceed the limit are allowed. The soft limit may be exceeded for a period of time (called the grace period). The
grace periods for the soft limits are set with the edquota command.
The command also displays the changes made to the file and block usage limits.
Note that the root user can exceed fileset quotas.
The chfsets command displays the following fileset information: Id
A unique number (in hexadecimal format) that identifies a file domain and fileset. File H limit
The file usage hard limit of the specified fileset before the change followed by the new limit. Block H limit
The block usage hard limit of the specified fileset before the change followed by the new limit. File S limit
The file usage soft limit of the specified fileset before the change followed by the new limit. Block S limit
The block usage soft limit of the specified fileset before the change followed by the new limit.
Use the following commands to manipulate filesets: Displays the limits and actual number of blocks used by a fileset. Displays space usage
for the specified domain. Displays the file and block usage limits for the filesets in a domain. Changes the user or group block and file
limits and grace period. Turns on and off quota enforcement.
For more information, see the reference pages for each command.
RESTRICTIONS
At least one fileset within the domain must be mounted for the chfsets command to succeed.
You must be the root user to run the chfsets command.
EXAMPLES
The following example changes the file hard limit from 11 to 200 and block hard limit from 121 to 1000 for the credit_fs fileset in the
account_dmn domain: # chfsets -b 1000 -f 200 account_dmn credit_fs
credit_fs
Id : 2c2f557f.000b15f4.3.8004
File H limit : 11 --> 200
Block H limit : 121 --> 1000
EXIT STATUS
The utility returns a 0 (zero) on success and a 1 (one) on failure.
SEE ALSO
Commands: df(1), edquota(8), quotaon(8), quotaoff(8), showfdmn(8), showfsets(8)
chfsets(8)