11-30-2012
Quote:
Originally Posted by
Corona688
That's a reason, but not the reason. The entire system uses PATH, not just you. This restriction gets rid of many unpredictable, unintended consequences.
OK, yes, that was very helpful. Everything that everyone was telling me is beginning to come together in my head.
Quote:
Originally Posted by alister
The open() system call, which is used to open a file for reading/writing, supports relative paths. When the path to the file does not contain any slashes, it is designed to look in the current working directory.
The exec*() family of system calls/library functions used to execute a file do not behave in this way. Some require an absolute path. Others (the ones with a p in their name), when the path provided does not contain a slash, will search only the directories in the $PATH environment variable.
Thanks, this also really helpful. But I have to ask: the ones with a 'p' in their name? I tried looking in
man, but it only tells you it's a
built-in. Is there a place where you can read about built-ins, system calls, or library functions?
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LEARN ABOUT CENTOS
gsettings
GSETTINGS(1) User Commands GSETTINGS(1)
NAME
gsettings - GSettings configuration tool
SYNOPSIS
gsettings get SCHEMA [:PATH] KEY
gsettings monitor SCHEMA [:PATH] [KEY]
gsettings writable SCHEMA [:PATH] KEY
gsettings range SCHEMA [:PATH] KEY
gsettings set SCHEMA [:PATH] KEY VALUE
gsettings reset SCHEMA [:PATH] KEY
gsettings reset-recursively SCHEMA [:PATH]
gsettings list-schemas
gsettings list-relocatable-schemas
gsettings list-keys SCHEMA [:PATH]
gsettings list-children SCHEMA [:PATH]
gsettings list-recursively [SCHEMA [:PATH]]
gsettings help [COMMAND]
DESCRIPTION
gsettings offers a simple commandline interface to GSettings. It lets you get, set or monitor an individual key for changes.
The SCHEMA and KEY arguments are required for most commands to specify the schema id and the name of the key to operate on. The schema id
may optionally have a :PATH suffix. Specifying the path is only needed if the schema does not have a fixed path.
When setting a key, you also need specify a VALUE The format for the value is that of a serialized GVariant, so e.g. a string must include
explicit quotes: "'foo'". This format is also used when printing out values.
COMMANDS
get
Gets the value of KEY. The value is printed out as a serialised GVariant.
monitor
Monitors KEY for changes and prints the changed values. If no KEY is specified, all keys in the schema are monitored. Monitoring will
continue until the process is terminated.
writable
Finds out whether KEY is writable.
range
Queries the range of valid values for KEY.
set
Sets the value of KEY to VALUE. The value is specified as a serialised GVariant.
reset
Resets KEY to its default value.
reset-recursively
Reset all keys under the given SCHEMA.
list-schemas
Lists the installed, non-relocatable schemas. See list-relocatable-schemas if you are interested in relocatable schemas.
list-relocatable-schemas
Lists the installed, relocatable schemas. See list-schemas if you are interested in non-relocatable schemas.
list-keys
Lists the keys in SCHEMA.
list-children
Lists the children of SCHEMA.
list-recursively
Lists keys and values, recursively. If no SCHEMA is given, list keys in all schemas.
help
Prints help and exits.
GIO
GSETTINGS(1)