From 7e0f021a9aec35fd8e6725e87e3313b101d26f5e Mon Sep 17 00:00:00 2001 From: Tobias Klauser Date: Sun, 27 Jan 2008 11:37:44 +0100 Subject: Initial import (2.0.2-6) --- reference/C/MAN/setpgid.htm | 166 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 166 insertions(+) create mode 100644 reference/C/MAN/setpgid.htm (limited to 'reference/C/MAN/setpgid.htm') diff --git a/reference/C/MAN/setpgid.htm b/reference/C/MAN/setpgid.htm new file mode 100644 index 0000000..be5deba --- /dev/null +++ b/reference/C/MAN/setpgid.htm @@ -0,0 +1,166 @@ +setpgid + +
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SETPGID(2)          Linux Programmer's Manual          SETPGID(2)
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NAME
+
       setpgid, getpgid, setpgrp, getpgrp - set/get process group
+
+
SYNOPSIS
+
       #include <unistd.h>
+
+       int setpgid(pid_t pid, pid_t pgid);
+       pid_t getpgid(pid_t pid);
+       int setpgrp(void);
+       pid_t getpgrp(void);
+
+
DESCRIPTION
+
       setpgid sets the process group ID of the process specified
+       by  pid  to  pgid.   If pid is zero, the process ID of the
+       current process is used.  If pgid is zero, the process  ID
+       of the process specified by pid is used.
+
+       getpgid returns the process group ID of the process speci-
+       fied by pid.  If pid is zero, the process ID of  the  cur-
+       rent process is used.
+
+       In  the  Linux  DLL  4.4.1  library,  setpgrp simply calls
+       setpgid(0,0).
+
+       getpgrp is equivalent to getpgid(0).
+
+       Process groups are used for distribution of  signals,  and
+       by  terminals  to arbitrate requests for their input: pro-
+       cesses that have the same process group  as  the  terminal
+       are  foreground and may read, while others will block with
+       a signal if they attempt to read.
+
+       These calls are thus used by programs such  as  csh(1)  to
+       create  process  groups  in implementing job control.  The
+       TIOCGPGRP and TIOCSPGRP calls described in termios(4)  are
+       used to get/set the process group of the control terminal.
+
+
RETURN VALUE
+
       On success, setpgid and setpgrp return zero.  On error, -1
+       is returned, and errno is set appropriately.
+
+       getpgid  returns a process group on success.  On error, -1
+       is returned, and errno is set appropriately.
+
+       getpgrp always returns the current process group.
+
+
ERRORS
+
       EINVAL  pgid is less than 0.
+
+       EPERM   Various permission violations.
+
+       ESRCH   pid does not match any process.
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Linux 1.2.4               15 April 1995                         1
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SETPGID(2)          Linux Programmer's Manual          SETPGID(2)
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SEE ALSO +

+getuid, +setsid, +tcsetpgrp, +termios, +

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Linux 1.2.4               15 April 1995                         2
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