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Questions tagged [getenv]

Anything related to C or C++ standard library functions `getenv` (C) or `std::getenv` (C++). These functions are used to get the value of an environment variable.

Anything related to C or C++ standard library functions getenv (defined in <stdlib.h> C standard header) or std::getenv (defined in <cstdlib> C++ standard header). These functions are used to get the value of an environment variable.

See CPPreference.com:

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Using getenv function

I have a C program that prints every environmental variable, whose name is given by stdin. It prints variables such as $PATH, $USER but it doesn't see the environmental variables i define myself in the Linux shell... For instance, in bash I define…
shaku
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PHP to Javascript: dirname and document_root

I got a little problem. I am working on a project and I got my root, then I got 2 folders: website1 and website2. website1 is the staff panel, where the upload script is on (where this problem is on). website2 is the website the 'customer' will…
Joshua Bakker
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Java getenv() returns null

I'm defining an environment variable in a Linux shell with TestEnviron=varproperty. Now, I want to write a small program that reads the environment variable, writes it to the console output, and writes the variable to a properties file. However when…
nick bijmoer
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Invalid catalog name: 1046 No database selected

So I'm running this tutorial series that helps you create a light social networking site using Laravel, Gulp and Codeception. I'm at the part where we build the registration form. The layout is done, code is done, user table added. When I goto the…
Halnex
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PHP getenv() returning only few parameters in Windows

I recently changed the webserver environment on my production system to Apache2.4/mod_fcgid 2.3.9. On restarting Apache, I realized that my scripts depending on the PHP getenv() were broken. Checking further, I could retrieve the Windows PATH with…
Ifedi Okonkwo
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Android 4.4+ : check if path is on secondary storage

My app has to check if a certain folder is on the secondary storage when the Android version is 4.4+. I am using this: private boolean isPathOnSecondaryStorage(String path) { boolean res=false; String…
P5music
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When getenv can alter content of previously returned pointer when using glibc?

C standard says that: The getenv function returns a pointer to a string associated with the matched list member. The string pointed to shall not be modified by the program, but may be overwritten by a subsequent call to the getenv…
adashie
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retrieve user path environment variable

I try to retrieve the path environment variable on Windows. Therefore, I tried #include #include using namespace std; int main() { char* path = getenv("Path"); cout << "current path is:" << path << endl; cin.get(); //…
Max Beikirch
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Grails External configuration Config System.getenv

i have code in config.groovy def ENV_NAME = "/home/myFolder" if(System.getenv("ENV_NAME")) { println( "Including configuration file: " + System.getenv("ENV_NAME")); grails.config.locations << "file:" + System.getenv("ENV_NAME") } else { …
rsijaya
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System.getenv("computername") truncating return value

What is the difference between System.getenv("computername") and System.getenv("hostname") in Java? Is there any character limit on the computer name when retrieving it using the getenv() method? I have a lengthy hostname and…
user811433
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c++ get variable set by call to system()

I am writing a program and i decided for input/output it would be best to allow for custom commands. I have written a config file and defined a series of commands (just echo, etc) and call these within the program using system(). The problem is that…
BennyBolton
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Java System.getEnv()

In mac OSX and in Linux CentOS, I insert a new system environment variable (i.e. "MYAPP") using .bashrc & .bash_profile. I even restarted my laptop (mac) and my server (linux). When I use the command line "env", that environment variable showed with…
user1580651
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set System.getenv in Linux

Im building some application, where i would like to get some variable directly from linux. I know, that the command to get the variable is System.getenv(), but i don't exackly know where i should set variable in linux. I'm using Centos, and my…
Ilkar
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Can I use getenv in daemon process under UNIX environment?

I am writing a daemon process (let's say pA), which is kicked off by a another process(let's say pB), in this daemon pA, I want to use getenv to access a evn variable defined in .cshrc, but to my surprise, getenv returns NULL in pA. I write a…
wangshuaijie
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About the method and scope of use of setenv()

I want to use setenv() for data transfer as follows: First, I convert an int to string, and then set a variable in a process, for example: setenv(TEST, test, 1) where TEST is the name of the environment variable, test is the converted numeric…
gazile
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