diff options
Diffstat (limited to 'man2/pipe.2')
| -rw-r--r-- | man2/pipe.2 | 45 |
1 files changed, 25 insertions, 20 deletions
diff --git a/man2/pipe.2 b/man2/pipe.2 index 400406b41..d8142f926 100644 --- a/man2/pipe.2 +++ b/man2/pipe.2 @@ -13,7 +13,7 @@ .\" to EXAMPLE text. .\" 2008-10-10, mtk: add description of pipe2() .\" -.TH pipe 2 2023-02-05 "Linux man-pages 6.03" +.TH pipe 2 2023-07-30 "Linux man-pages 6.05.01" .SH NAME pipe, pipe2 \- create pipe .SH LIBRARY @@ -32,7 +32,7 @@ Standard C library .BI "int pipe2(int " pipefd "[2], int " flags ); .PP /* On Alpha, IA-64, MIPS, SuperH, and SPARC/SPARC64, pipe() has the - following prototype; see NOTES */ + following prototype; see VERSIONS */ .PP .B #include <unistd.h> .PP @@ -193,16 +193,6 @@ and support for notifications .RB ( CONFIG_WATCH_QUEUE ) is not compiled into the kernel. .SH VERSIONS -.BR pipe2 () -was added in Linux 2.6.27; -glibc support is available starting with glibc 2.9. -.SH STANDARDS -.BR pipe (): -POSIX.1-2001, POSIX.1-2008. -.PP -.BR pipe2 () -is Linux-specific. -.SH NOTES .\" See http://math-atlas.sourceforge.net/devel/assembly/64.psabi.1.33.ps.Z .\" for example, section 3.2.1 "Registers and the Stack Frame". The System V ABI on some architectures allows the use of more than one register @@ -219,6 +209,21 @@ wrapper function transparently deals with this. See .BR syscall (2) for information regarding registers used for storing second file descriptor. +.SH STANDARDS +.TP +.BR pipe () +POSIX.1-2008. +.TP +.BR pipe2 () +Linux. +.SH HISTORY +.TP +.BR pipe () +POSIX.1-2001. +.TP +.BR pipe2 () +Linux 2.6.27, +glibc 2.9. .SH EXAMPLES .\" fork.2 refers to this example program. The following program creates a pipe, and then @@ -243,40 +248,40 @@ and echoes it on standard output. #include <string.h> #include <sys/wait.h> #include <unistd.h> - +\& int main(int argc, char *argv[]) { int pipefd[2]; char buf; pid_t cpid; - +\& if (argc != 2) { fprintf(stderr, "Usage: %s <string>\en", argv[0]); exit(EXIT_FAILURE); } - +\& if (pipe(pipefd) == \-1) { perror("pipe"); exit(EXIT_FAILURE); } - +\& cpid = fork(); if (cpid == \-1) { perror("fork"); exit(EXIT_FAILURE); } - +\& if (cpid == 0) { /* Child reads from pipe */ close(pipefd[1]); /* Close unused write end */ - +\& while (read(pipefd[0], &buf, 1) > 0) write(STDOUT_FILENO, &buf, 1); - +\& write(STDOUT_FILENO, "\en", 1); close(pipefd[0]); _exit(EXIT_SUCCESS); - +\& } else { /* Parent writes argv[1] to pipe */ close(pipefd[0]); /* Close unused read end */ write(pipefd[1], argv[1], strlen(argv[1])); |