system return value
You forgot to read the whole section. [T]he return value is a "wait status" that can be examined using the macros described in waitpid(2) .,The system function returns -1 if system itself fails, not if the command it invokes fails. For example, system returns -1 if the fork call fails. This can happen if your ...
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 system return value 相關參考資料
How to get system() function executed cmd return value ? - UNIX ...
Hi, How I can get system function executed command return value ? I want to know mv command success or not ? #include main() int ret; ret = system( "mv ... https://www.unix.com Return value of System Function - Stack Overflow
You forgot to read the whole section. [T]he return value is a "wait status" that can be examined using the macros described in waitpid(2) . https://stackoverflow.com Return value of system() function - Stack Overflow
The system function returns -1 if system itself fails, not if the command it invokes fails. For example, system returns -1 if the fork call fails. This can happen if your ... https://stackoverflow.com return value of system() in C - Stack Overflow
As the docs state system() return -1 if creating the new process for the command to be executed fails, otherwise it returns the exit code of the ... https://stackoverflow.com Return value of system() is not return value of executed program ...
The return value of system is actually the return value of waitpid() under POSIX. status actually has a lot of information embedded in it: From the ... https://stackoverflow.com Return value of x = os.system(..) - Stack Overflow
os.system() returns the (encoded) process exit value. 0 means success: On Unix, the return value is the exit status of the process encoded in ... https://stackoverflow.com system - C++ Reference - cplusplus.com
If command is not a null pointer, the value returned depends on the system and library implementations, but it is generally expected to be the status code ... http://www.cplusplus.com system(3) - Linux manual page - man7.org
http://man7.org Using system return value in C to flag errors - Stack Overflow
The return value of system() is passed as part of the the return status. Use WEXITSTATUS(status) to retrieve it: int status = system("my command"); if (status != https://stackoverflow.com [問題] system return value - 看板C_and_CPP - 批踢踢實業坊
問題主要二個(1) 不用pipe 如何取得另一個執行檔之return value ? (2) 請問system 之return value 意義為何??- 先謝謝各位的不吝解惑。 -- 就算把 ... https://www.ptt.cc |