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Rename 'filedes' argument 'pipefd'.

This commit is contained in:
Michael Kerrisk 2007-12-24 22:02:58 +00:00
parent 970a069b6c
commit a17e03f5cb
1 changed files with 14 additions and 14 deletions
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28
man2/pipe.2
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@ -33,15 +33,15 @@ pipe \- create pipe
.SH SYNOPSIS
.B #include <unistd.h>
.sp
.BI "int pipe(int " filedes "[2]);"
.BI "int pipe(int " pipefd "[2]);"
.SH DESCRIPTION
.BR pipe ()
creates a pair of file descriptors, pointing to a pipe inode, and places
them in the array pointed to by
.IR filedes .
.I filedes[0]
.IR pipefd .
.I pipefd[0]
is for reading,
.I filedes[1]
.I pipefd[1]
is for writing.
.SH "RETURN VALUE"
On success, zero is returned.
@ -51,7 +51,7 @@ is set appropriately.
.SH ERRORS
.TP
.B EFAULT
.I filedes
.I pipefd
is not valid.
.TP
.B EMFILE
@ -87,13 +87,13 @@ and echoes it on standard output.
int
main(int argc, char *argv[])
{
int pfd[2];
int pipefd[2];
pid_t cpid;
char buf;
assert(argc == 2);
if (pipe(pfd) == \-1) {
if (pipe(pipefd) == \-1) {
perror("pipe");
exit(EXIT_FAILURE);
}
@ -105,20 +105,20 @@ main(int argc, char *argv[])
}
if (cpid == 0) { /* Child reads from pipe */
close(pfd[1]); /* Close unused write end */
close(pipefd[1]); /* Close unused write end */
while (read(pfd[0], &buf, 1) > 0)
while (read(pipefd[0], &buf, 1) > 0)
write(STDOUT_FILENO, &buf, 1);
write(STDOUT_FILENO, "\\n", 1);
close(pfd[0]);
close(pipefd[0]);
_exit(EXIT_SUCCESS);
} else { /* Parent writes argv[1] to pipe */
close(pfd[0]); /* Close unused read end */
write(pfd[1], argv[1], strlen(argv[1]));
close(pfd[1]); /* Reader will see EOF */
wait(NULL); /* Wait for child */
close(pipefd[0]); /* Close unused read end */
write(pipefd[1], argv[1], strlen(argv[1]));
close(pipefd[1]); /* Reader will see EOF */
wait(NULL); /* Wait for child */
exit(EXIT_SUCCESS);
}
}