Namespace
Varianti

getenv

Da cppreference.com.
< c‎ | program

 
 
Programma di supporto utilità
Programma di terminazione
Original:
Program termination
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abort
exit
quick_exit(C++11)
_Exit(C++11)
Comunicante con l'ambiente
Original:
Communicating with the environment
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getenv
Segnali
Original:
Signals
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Tipi di segnale
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Signal types
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SIGABRT
SIGFPE
SIGILL
SIGINT
SIGSEGV
SIGTERM
Non locali salti
Original:
Non-local jumps
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setjmp
longjmp
Tipi
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Types
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jmp_buf
 
Defined in header <stdlib.h>
const char *getenv( const char *env_var );
Cerca un variabile ambientale con env_var nome nella lista di host specificato ambiente e restituisce le informazioni ad esso associati. L'insieme di variabili ambientali e metodi di alterarla sono definiti dall'implementazione.
Original:
Searches for an environmental variable with name env_var in the host-specified environment list and returns information associated with it. The set of environmental variables and methods of altering it are implementation-defined.
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Indice

[modifica] Parametri

env_var -
terminazione null stringa di caratteri che identifica il nome della variabile d'ambiente per cercare
Original:
null-terminated character string identifying the name of the environmental variable to look for
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[modifica] Valore di ritorno

stringa di caratteri che identifica il valore della variabile ambientale o NULL se tale variabile non viene trovato.
Original:
character string identifying the value of the environmental variable or NULL if such variable is not found.
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[modifica] Esempio

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