Linux Basics: Difference between revisions
→List of System Calls
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! Type !! System Call !! Description !! Call Syntax
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|exec || Also used to create processes; but replaces the address space, text segment, data segment etc. of the current process with the new process.<br/> Only the new process exists after exec().<br/> The process which made the system call, wouldn't exist.
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|open || open and possibly create a file
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|openat || open and possibly create a file
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|close || close a file descriptor
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|syslog || read and/or clear kernel message ring buffer; set console_loglevel
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|ptrace || process trace
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getuid get user identity▼
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utime change file last access and modification times▼
ustat get filesystem statistics▼
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statfs get filesystem statistics▼
sysfs get filesystem type information▼
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getpriority get/set program scheduling priority▼
mlock lock and unlock memory▼
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sysctl read/write system parameters▼
prctl operations on a process▼
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chroot change root directory▼
sync commit filesystem caches to disk▼
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mount mount filesystem▼
umount unmount filesystem▼
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swapon start swapping to file/device▼
swapoff stop swapping to file/device▼
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reboot reboot or enable/disable Ctrl-Alt-Del▼
sethostname set hostname▼
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gethostname get hostname▼
ioperm set port input/output permissions▼
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init_module load a kernel module▼
delete_module unload a kernel module▼
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|io_setup || create an asynchronous I/O context
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|ppoll || wait for some event on a file descriptor
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|tee || duplicating pipe content
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|getcpu || determine CPU and NUMA node on which the calling thread is running
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