08-26-2019
8 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi, I was debating if I should put this in the dummies or scripts section, I apologize in advance if I chose poorly.
Fairly new to Unix and BASH scripting but I thought I made it fairly well given my limited understanding. However, the output indicates that it's looping and I'm ending up with a... (5 Replies)
Discussion started by: gotreef
5 Replies
2. What is on Your Mind?
I was testing Fedora 16 mostly to check the new features. One thing that caught my eye as a systems admin is the systemd which is incorporated in Fedora for quite a while now.
From the first look of it, this appears more close to Solaris's SMF. With parallelization capabilities, advanced... (0 Replies)
Discussion started by: admin_xor
0 Replies
3. UNIX for Advanced & Expert Users
I am writing a program that must determine certain things about services. How can I, or my program, determine which services are started automatically when a given target becomes active. It is my impression that just looking in the target's .wants directory is inadequate because of other... (2 Replies)
Discussion started by: Brandon9000
2 Replies
4. Linux
I'm on Arch and I have a strange issue with systemctl hibernate command. It hibernates and resumes just fine (I have TuxOnIce), but in the last stage of resume, it completely shuts down my laptop screen, so I cannot see anything even though I know the system resumed just fined and the desktop is... (1 Reply)
Discussion started by: lockheed
1 Replies
5. UNIX for Advanced & Expert Users
Hallo
I don't know where to put my question so I put it here.
I want that systemd let run a script but only on shutdown or reboot
and before the system umount the mounted devices.
I look on google but only a little information is found and not working
Until no, I don't find an solution for... (1 Reply)
Discussion started by: thailand
1 Replies
6. SuSE
Hello All,
OS: openSUSE 13.1 (Bottle) (armv7hl)
uname -a: Linux linux.site 3.14.14-cubox-i #1 SMP Sat Sep 13 03:48:24 UTC 2014 armv7l armv7l armv7l GNU/Linux
So this is my first attempt at starting a service at boot with systemd. I've done this with inittab in the past,
but I'm having... (0 Replies)
Discussion started by: mrm5102
0 Replies
7. UNIX for Beginners Questions & Answers
journalctl --since "tomorrow"
By idea to show magazines from tomorrow. As it is illogical.
Tell me what is the essence of the team with the key tomorrow?
Code tags please (1 Reply)
Discussion started by: alekseev
1 Replies
8. UNIX for Advanced & Expert Users
Hi,
systemd cant start my script, but it work, at command prompt.
Code and execute at command prompt
#cat collector.sh
#!/bin/bash
case $1 in
start)
/home/postgres/scripts/pgwatch2/pgwatch2.sh
/home/postgres/scripts/pgwatch2/pgwatch2_UI.sh
;;
... (7 Replies)
Discussion started by: kvaikla
7 Replies
LEARN ABOUT LINUX
elf_cntl
elf_cntl(3ELF) ELF Library Functions elf_cntl(3ELF)
NAME
elf_cntl - control an elf file descriptor
SYNOPSIS
cc [ flag ... ] file ... -lelf [ library ... ]
#include <libelf.h>
int elf_cntl(Elf *elf, Elf_Cmd cmd);
DESCRIPTION
elf_cntl() instructs the library to modify its behavior with respect to an ELF descriptor, elf. As elf_begin(3ELF) describes, an ELF
descriptor can have multiple activations, and multiple ELF descriptors may share a single file descriptor. Generally, elf_cntl() commands
apply to all activations of elf. Moreover, if the ELF descriptor is associated with an archive file, descriptors for members within the ar-
chive will also be affected as described below. Unless stated otherwise, operations on archive members do not affect the descriptor for the
containing archive.
The cmd argument tells what actions to take and may have the following values:
ELF_C_FDDONE This value tells the library not to use the file descriptor associated with elf. A program should use this command when it
has requested all the information it cares to use and wishes to avoid the overhead of reading the rest of the file. The
memory for all completed operations remains valid, but later file operations, such as the initial elf_getdata() for a sec-
tion, will fail if the data are not in memory already.
ELF_C_FDREAD This command is similar to ELF_C_FDDONE, except it forces the library to read the rest of the file. A program should use
this command when it must close the file descriptor but has not yet read everything it needs from the file. After
elf_cntl() completes the ELF_C_FDREAD command, future operations, such as elf_getdata(), will use the memory version of the
file without needing to use the file descriptor.
If elf_cntl() succeeds, it returns 0. Otherwise elf was NULL or an error occurred, and the function returns -1.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Stable |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
elf(3ELF), elf_begin(3ELF), elf_getdata(3ELF), elf_rawfile(3ELF), libelf(3LIB), attributes(5)
NOTES
If the program wishes to use the ``raw'' operations (see elf_rawdata(), which elf_getdata(3ELF) describes, and elf_rawfile(3ELF)) after
disabling the file descriptor with ELF_C_FDDONE or ELF_C_FDREAD, it must execute the raw operations explicitly beforehand. Otherwise, the
raw file operations will fail. Calling elf_rawfile() makes the entire image available, thus supporting subsequent elf_rawdata() calls.
SunOS 5.10 11 Jul 2001 elf_cntl(3ELF)