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prctl.2: Be more precise in what causes dumpable to reset

PATCH In review Keno Fischer 2 participants 2 messages Dec 27, 2016 – Dec 28, 2016 1 message not in the archive Man-pages: manual pages for Linux -- Sections 2, 3, 4, 5, and 7

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Keno Fischer

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PATCH 1/2 prctl.2: Be more precise in what causes dumpable to reset

---
 man2/prctl.2 | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)
man2/prctl.2 +10 -4
index 26ac5d4..4e037e4 100644
@@ -216,7 +216,7 @@ However, it is reset to the current value contained in the file
 in the following circumstances:
 .\" See kernel/cred.c::commit_creds() (Linux 3.18 sources)
 .RS
-.IP * 3
+.IP * 4
 The process's effective user or group ID is changed.
 .IP *
 The process's filesystem user or group ID is changed (see

@@ -224,9 +224,15 @@ The process's filesystem user or group ID is changed (see
 .IP *
 The process executes
 .RB ( execve (2))
-a set-user-ID or set-group-ID program,
-or a program that has capabilities (see
-.BR capabilities (7)).
+a set-user-ID or set-group-ID program, resuling in a change
+of either effective user or group id.
+.IP *
+The process executes
+.RB ( execve (2))
+a program that has file capabilities (see
+.BR capabilities (7)),
+but only if the permitted capabilities
+gained exceed those already permitted for the current process.
 .\" Also certain namespace operations;
 .RE
 .IP
Signature · 6 lines
2.8.1

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A message that is not in the archive (sent off-list or not yet received): 20161227215216.GA1211-9DCaDmOhoh+8M3too/[email protected]

#2 lore raw

Hello Keno,

Quoted 3 lines · Keno Fischer
---
 man2/prctl.2 | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

Thanks! Patch applied. One minor comment below.

man2/prctl.2 However, it is reset to the current value contained in the file · line 219

Quoted 10 lines
man2/prctl.2 +1 -1
index 26ac5d4..4e037e4 100644
@@ -216,7 +216,7 @@ However, it is reset to the current value contained in the file
 in the following circumstances:
 .\" See kernel/cred.c::commit_creds() (Linux 3.18 sources)
 .RS
-.IP * 3
+.IP * 4

Best to separate such minor formatting changes into a separate patch. That said, an indent of 3 is the norm, and I reverted this change.

Cheers,

Michael

Quoted 22 lines
man2/prctl.2 +9 -3
 The process's effective user or group ID is changed.
 .IP *
 The process's filesystem user or group ID is changed (see

@@ -224,9 +224,15 @@ The process's filesystem user or group ID is changed (see
 .IP *
 The process executes
 .RB ( execve (2))
-a set-user-ID or set-group-ID program,
-or a program that has capabilities (see
-.BR capabilities (7)).
+a set-user-ID or set-group-ID program, resuling in a change
+of either effective user or group id.
+.IP *
+The process executes
+.RB ( execve (2))
+a program that has file capabilities (see
+.BR capabilities (7)),
+but only if the permitted capabilities
+gained exceed those already permitted for the current process.
 .\" Also certain namespace operations;
 .RE
 .IP
Signature · 7 lines
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
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