exec pipe
Using exec with & makes little sense (though that is not going to be the source of your problem), that will not save any extra fork. With pipe ..., You need not to wait every time you create a new process and also close the descriptor in the parent, something like: if((process1=fork())==0) ...,find /path/to/jpgs -type f -exec sh -c 'jhead -v } | grep 123' -; -print ... This might (not tested) be more effective than using -exec because it will pipe the list of files ... , Try to add braces: shell_exec("(command1 | command2)");. There is a comment in the PHP documentation that does some I/O-redirection with ..., exec replaces the instruction and data segments by those inferred from the indicated file and starts the process running. The system data ...,What catches my eye immediatly is -if(pipe(dados) == -1 && pipe(dados2) == -1) +if(pipe(dados) == -1 || pipe(dados2) == -1) perror("pipe failed"); exit(1); }. , You need to close all the pipe descriptors in both the parent process and the child process (after duplication in the child process). In your code ..., I want to communicate two programs using pipes. First of all I don't want to use named pipe, just simple dup2(). I have two programs: 1) ...,簡介fork, exec*, dup2, pipe 實作Command Interpreter 的Pipeline：上一篇的綜合練習看完上一篇，大家應該有能力寫一個具有Pipeline 功能的 ... ,簡介fork, exec*, pipe, dup2 前言鄭卜壬老師在上課的時候，以極快的速度講過了fork, exec*, pipe, dup2 幾個指令，並以下面的程式示範了一個Shell ...
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 exec pipe 相關參考資料
bash - Pipe inside exec command won't work - Unix & Linux Stack ...
Using exec with & makes little sense (though that is not going to be the source of your problem), that will not save any extra fork. With pipe ... https://unix.stackexchange.com exec() and pipe() between child process in C - Stack Overflow
You need not to wait every time you create a new process and also close the descriptor in the parent, something like: if((process1=fork())==0) ... https://stackoverflow.com How do I use a pipe in the exec parameter for a find command ...
find /path/to/jpgs -type f -exec sh -c 'jhead -v } | grep 123' -; -print ... This might (not tested) be more effective than using -exec because it will pipe the list of files ... https://stackoverflow.com How to use pipe (" | ") in PHP exec? - Stack Overflow
Try to add braces: shell_exec("(command1 | command2)");. There is a comment in the PHP documentation that does some I/O-redirection with ... https://stackoverflow.com Pipe, Fork and Exec and Related Topics
exec replaces the instruction and data segments by those inferred from the indicated file and starts the process running. The system data ... http://www.cs.uleth.ca Pipes & exec & C - Stack Overflow
What catches my eye immediatly is -if(pipe(dados) == -1 && pipe(dados2) == -1) +if(pipe(dados) == -1 || pipe(dados2) == -1) perror("pipe failed"); exit(1); }. https://stackoverflow.com Pipes, dup2 and exec() - Stack Overflow
You need to close all the pipe descriptors in both the parent process and the child process (after duplication in the child process). In your code ... https://stackoverflow.com Problems with pipe and exec in linux - C Board - Cprogramming.com
I want to communicate two programs using pipes. First of all I don't want to use named pipe, just simple dup2(). I have two programs: 1) ... https://cboard.cprogramming.co Re: [系程] 教學: 簡介fork, exec*, pipe, dup2 - 批踢踢實業坊
簡介fork, exec*, dup2, pipe 實作Command Interpreter 的Pipeline：上一篇的綜合練習看完上一篇，大家應該有能力寫一個具有Pipeline 功能的 ... https://www.ptt.cc [系程] 教學: 簡介fork, exec*, pipe, dup2 - 看板b97902HW - 批踢踢實業坊
簡介fork, exec*, pipe, dup2 前言鄭卜壬老師在上課的時候，以極快的速度講過了fork, exec*, pipe, dup2 幾個指令，並以下面的程式示範了一個Shell ... https://www.ptt.cc |