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PO
primarykey
Id
2942937
data
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0
AnswerCount
0
ClosedDate
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1
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CreationDate
2010-05-31T10:36:00.810
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0
LastActivityDate
2010-05-31T10:36:00.810
LastEditDate
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0
OwnerUserId
354503
ParentId
2939065
PostTypeId
2
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0
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0
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text
Body
<p>FIFO Writer:</p> <pre><code> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <sys/types.h> #include <sys/wait.h> #include <fcntl.h> #define BUFFERSIZE 50 #define CHMOD 0777 int main(int argc, char **argv) { char outbuf[BUFFERSIZE]; // outbuffer int fifo, j, anzahl; // fifo - pipe file deskriptor, j - counter, anzahl - Parameter. if(argc!=2) // Check if parameter is ok { printf("Ungültiger Parameter! Bsp.: ./fifow 10\n"); return 1; } anzahl=atoi(argv[1]); // convert paramter to integer mkfifo("namedpipe4", CHMOD); // make FIFO "namedpipe4" fifo = open("namedpipe4",O_WRONLY); // open FIFO // for(j=0;j<anzahl;j++) { printf("Writer PID: %d writes record nr. %6d\n", getpid(), j+1); sprintf(outbuf, "Writer PID: %d writes record nr. %6d\n", getpid(), j+1); write(fifo, outbuf, BUFFERSIZE); remove("namedpipe4"); // removing the fifo sleep(1); // Wait 1 sec } close(fifo); // exit(0); } </code></pre> <p>FIFO Reader:</p> <pre><code>#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <sys/types.h> #include <sys/wait.h> #include <fcntl.h> #define BUFFERSIZE 50 int main(void) { char inbuf[BUFFERSIZE]; // inbuffer int fifo, var; printf("\n Waiting for a Pipe....\n"); while((fifo = open("namedpipe4",O_RDONLY)) == -1) // while "there is no such pipe" { remove("namedpipe4"); sleep(1); } while((var = read(fifo, inbuf, BUFFERSIZE)) > 0) // while "i can read" { printf("Reader PID: %d reads record: %s\n", getpid(), inbuf); sleep(1); } close(fifo); // printf("\n EOF..\n"); exit(0); } </code></pre>
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Title
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PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POUNIX FIFO: How to allow only one writer/reader pair to use a FIFO?
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1. PTAnswer
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1. This table or related slice is empty.
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1. USMax Krug
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1. COFor future reference, you can always edit your questions after you post them (rather than posting updates as answers to your questions, which is all kinds of semantically bad)
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  UserUserId
  USjasonmp85

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