Re: strtonum(3)
This is a multi-part message in MIME format.
--Multipart=_Tue__27_Jul_2004_15_02_22_-0700_B+XZw10u8uQw0G5A
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
On Mon, 26 Jul 2004 08:25:23 +0200
Jeroen Ruigrok/asmodai <asmodai@wxs.nl> wrote:
> -On [20040726 08:12], Chris Pressey (cpressey@catseye.mine.nu) wrote:
> >I like it, but I don't know what our official policy (if any) on
> >stdlib API extensions is... assuming we're open to them, I'll be
> >happy to handle this.
>
> Do I need to mention strlcat(), strlcpy() and such extensions?
>
> Just add it, this kind of stuff sets a precedent and we can then lobby
> the C committee and the SUS/POSIX guys for extending the base
> specifications since we are actively using it.
In that case, I propose adding an extension to obtain the pid of the
process on the other end of a popen()'ed stream; see attached patch.
This information is currently impossible to get at without rolling your
own custom popen/pclose functions (which I had to do in the installer.)
-Chris
--Multipart=_Tue__27_Jul_2004_15_02_22_-0700_B+XZw10u8uQw0G5A
Content-Type: text/plain;
name="pgetpid.diff"
Content-Disposition: attachment;
filename="pgetpid.diff"
Content-Transfer-Encoding: 7bit
Index: include/stdio.h
===================================================================
RCS file: /home/dcvs/src/include/stdio.h,v
retrieving revision 1.5
diff -u -r1.5 stdio.h
--- include/stdio.h 15 Nov 2003 19:28:42 -0000 1.5
+++ include/stdio.h 26 Jul 2004 19:19:44 -0000
@@ -49,6 +49,11 @@
#include <machine/stdarg.h>
#endif
+#ifndef _PID_T_DECLARED
+#define _PID_T_DECLARED
+typedef __pid_t pid_t; /* process id */
+#endif
+
#ifndef _SIZE_T_DECLARED
#define _SIZE_T_DECLARED
typedef __size_t size_t;
@@ -313,6 +318,7 @@
__off_t ftello (FILE *);
int getw (FILE *);
int pclose (FILE *);
+pid_t pgetpid (FILE *);
FILE *popen (const char *, const char *);
int putw (int, FILE *);
void setbuffer (FILE *, char *, int);
Index: sys/sys/types.h
===================================================================
RCS file: /home/dcvs/src/sys/sys/types.h,v
retrieving revision 1.6
diff -u -r1.6 types.h
--- sys/sys/types.h 15 Nov 2003 19:28:42 -0000 1.6
+++ sys/sys/types.h 26 Jul 2004 19:19:28 -0000
@@ -82,7 +82,6 @@
typedef __uint16_t mode_t; /* permissions */
typedef __uint16_t nlink_t; /* link count */
typedef __off_t off_t; /* file offset */
-typedef __pid_t pid_t; /* process id */
typedef quad_t rlim_t; /* resource limit */
typedef __int32_t segsz_t; /* segment size */
typedef __int32_t swblk_t; /* swap offset */
@@ -131,6 +130,11 @@
typedef __clockid_t clockid_t;
#endif
+#ifndef _PID_T_DECLARED
+#define _PID_T_DECLARED
+typedef __pid_t pid_t; /* process id */
+#endif
+
#ifndef _SIZE_T_DECLARED
#define _SIZE_T_DECLARED
typedef __size_t size_t;
Index: lib/libc/gen/popen.3
===================================================================
RCS file: /home/dcvs/src/lib/libc/gen/popen.3,v
retrieving revision 1.2
diff -u -r1.2 popen.3
--- lib/libc/gen/popen.3 17 Jun 2003 04:26:42 -0000 1.2
+++ lib/libc/gen/popen.3 27 Jul 2004 21:50:40 -0000
@@ -33,12 +33,13 @@
.\" $FreeBSD: src/lib/libc/gen/popen.3,v 1.10.2.4 2003/03/15 15:11:05 trhodes Exp $
.\" $DragonFly: src/lib/libc/gen/popen.3,v 1.2 2003/06/17 04:26:42 dillon Exp $
.\"
-.Dd May 3, 1995
+.Dd Jul 27, 2004
.Dt POPEN 3
.Os
.Sh NAME
.Nm popen ,
-.Nm pclose
+.Nm pclose ,
+.Nm pgetpid
.Nd process
.Tn I/O
.Sh LIBRARY
@@ -49,6 +50,8 @@
.Fn popen "const char *command" "const char *type"
.Ft int
.Fn pclose "FILE *stream"
+.Ft pid_t
+.Fn pgetpid "FILE *stream"
.Sh DESCRIPTION
The
.Fn popen
@@ -124,6 +127,12 @@
and returns the exit status of the command
as returned by
.Fn wait4 .
+.Pp
+The
+.Fn pgetpid
+function returns the pid of the process on the other end of a stream that
+was opened with
+.Fn popen .
.Sh RETURN VALUES
The
.Fn popen
@@ -145,11 +154,20 @@
.Dq popened
command, if
.Fa stream
-already
+has already been
.Dq pclosed ,
or if
.Xr wait4
returns an error.
+.Pp
+The
+.Fn pgetpid
+function returns (pid_t)\-1 if
+.Fa stream
+is not associated with a
+.Dq popened
+command or if it has already been
+.Dq pclosed .
.Sh ERRORS
The
.Fn popen
@@ -200,3 +218,7 @@
.Pp
Bidirectional functionality was added in
.Fx 2.2.6 .
+The
+.Fn pgetpid
+function appeared in
+.Dx 1.1 .
Index: lib/libc/gen/popen.c
===================================================================
RCS file: /home/dcvs/src/lib/libc/gen/popen.c,v
retrieving revision 1.3
diff -u -r1.3 popen.c
--- lib/libc/gen/popen.c 6 Jun 2004 15:05:55 -0000 1.3
+++ lib/libc/gen/popen.c 26 Jul 2004 19:03:19 -0000
@@ -188,3 +188,14 @@
return (pid == -1 ? -1 : pstat);
}
+
+pid_t
+pgetpid(FILE *iop)
+{
+ struct pid *cur;
+
+ for (cur = pidlist; cur != NULL; cur = cur->next)
+ if (cur->fp == iop)
+ return (cur->pid);
+ return (-1);
+}
--Multipart=_Tue__27_Jul_2004_15_02_22_-0700_B+XZw10u8uQw0G5A--
討論串 (同標題文章)
完整討論串 (本文為第 4 之 8 篇)：