execlp return value
The execlp() function replaces the current process image with a new process image specified by file. The new image is constructed from a regular, executable file called the new process image file. No return is made because the calling process image is rep, exec, execl, execv, execle, execve, execlp, execvp- execute a file .... has occurred; the return value is -1 and errno is set to indicate the error., NAME top. execl, execlp, execle, execv, execvp, execvpe - execute a file ... The return value is -1, and errno is set to indicate the error.,跳到 RETURN VALUE - The exec() functions return only if an error has occurred. The return value is -1, and errno is set to indicate the error. , If exec succeeds it will NEVER return. Succeeding means be able to find and launch the command. If it doesn't succeed it will return -1., Have the parent process wait for the child to exit: pid_t pid = fork(); if (pid == -1) // error, no child created } else if (pid == 0) // child } else ..., The execlp system call doesn't return unless there is an error. It will replace your current program with a new one (your code stops there, ..., After call execlp() , the memory image of current process will be replaced by the called progame, so you cannot get what you want through return value. What you can do is let the child process write its result to somehere, such as a temporal file or a pi,Return Value The exec() functions only return if an error has occurred. The return value is -1, and errno is set to indicate the error. , You could do something like this: pid = fork(); if (pid == 0) execlp("ReturnValue.c", ...); } else if (pid > 0) waitpid(pid, &status, ...); /* extract the ...
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 execlp return value 相關參考資料
execlp
The execlp() function replaces the current process image with a new process image specified by file. The new image is constructed from a regular, executable file called the new process image file. No ... http://www.qnx.com execlp(2) (man pages section 2: System Calls)
exec, execl, execv, execle, execve, execlp, execvp- execute a file .... has occurred; the return value is -1 and errno is set to indicate the error. https://docs.oracle.com exec(3) - Linux manual page - man7.org
NAME top. execl, execlp, execle, execv, execvp, execvpe - execute a file ... The return value is -1, and errno is set to indicate the error. http://man7.org execlp: execute a file - Linux Man Pages (3) - SysTutorials
跳到 RETURN VALUE - The exec() functions return only if an error has occurred. The return value is -1, and errno is set to indicate the error. https://www.systutorials.com Return value of execl - Stack Overflow
If exec succeeds it will NEVER return. Succeeding means be able to find and launch the command. If it doesn't succeed it will return -1. https://stackoverflow.com how can I get the return value of a program executed by exec ...
Have the parent process wait for the child to exit: pid_t pid = fork(); if (pid == -1) // error, no child created } else if (pid == 0) // child } else ... https://stackoverflow.com Execlp doesn't return a number - Stack Overflow
The execlp system call doesn't return unless there is an error. It will replace your current program with a new one (your code stops there, ... https://stackoverflow.com Getting return from execlp() - Stack Overflow
After call execlp() , the memory image of current process will be replaced by the called progame, so you cannot get what you want through return value. What you can do is let the child process write ... https://stackoverflow.com execlp(3): execute file - Linux man page
Return Value The exec() functions only return if an error has occurred. The return value is -1, and errno is set to indicate the error. https://linux.die.net How to find the return value of a program after execlp()? - Stack ...
You could do something like this: pid = fork(); if (pid == 0) execlp("ReturnValue.c", ...); } else if (pid > 0) waitpid(pid, &status, ...); /* extract the ... https://stackoverflow.com |