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getenv

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Utilitários de apoio do programa
Término do programa
Original:
Program termination
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abort
exit
quick_exit(C++11)
_Exit(C++11)
Comunicando com o meio ambiente
Original:
Communicating with the environment
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getenv
Sinais
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Signals
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Tipos de sinais
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Signal types
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SIGABRT
SIGFPE
SIGILL
SIGINT
SIGSEGV
SIGTERM
Não-locais saltos
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Non-local jumps
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setjmp
longjmp
Tipos
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Types
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jmp_buf
 
Defined in header <stdlib.h>
const char *getenv( const char *env_var );
Pesquisas de uma variável ambiental com env_var nome no host especificado lista ambiente e retorna informações associada a ele. O conjunto de variáveis ​​ambientais e métodos de alterá-lo é definida pela implementação.
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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Índice

[editar] Parâmetros

env_var -
terminada em nulo cadeia de caracteres que identifica o nome da variável ambiental para procurar
Original:
null-terminated character string identifying the name of the environmental variable to look for
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[editar] Valor de retorno

cadeia de caracteres que identifica o valor da variável de ambiente ou NULL se tal variável não for encontrado.
Original:
character string identifying the value of the environmental variable or NULL if such variable is not found.
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[editar] Exemplo

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