Linux Manuals session 2

NAME pidfd_open – obtain a file descriptor that refers to a process SYNOPSIS #include <sys/types.h> int pidfd_open(pid_t pid, unsigned int flags); DESCRIPTION The pidfd_open() system call creates a file descriptor that refers to the process whose PID is specified in pid. The file descriptor is returned as the function result; the close-on-exec flag is set…

NAME pidfd_getfd – obtain a duplicate of another process’s file descriptor SYNOPSIS int pidfd_getfd(int pidfd, int targetfd, unsigned int flags); DESCRIPTION The pidfd_getfd() system call allocates a new file descriptor in the calling process. This new file descriptor is a duplicate of an existing file descriptor, targetfd, in the process referred to by the PID…

NAME afs_syscall, break, fattach, fdetach, ftime, getmsg, getpmsg, gtty, isastream, lock, madvise1, mpx, prof, profil, putmsg, putpmsg, security, stty, tuxcall, ulimit, vserver – unimplemented system calls SYNOPSIS Unimplemented system calls. DESCRIPTION These system calls are not implemented in the Linux kernel. RETURN VALUE These system calls always return -1 and set errno to ENOSYS. NOTES…

NAME personality – set the process execution domain SYNOPSIS #include <sys/personality.h> int personality(unsigned long persona); DESCRIPTION Linux supports different execution domains, or personalities, for each process. Among other things, execution domains tell Linux how to map signal numbers into signal actions. The execution domain system allows Linux to provide limited support for binaries compiled under…

NAME perfmonctl – interface to IA-64 performance monitoring unit SYNOPSIS #include <perfmon.h> #include <syscall.h> long perfmonctl(int fd, int cmd, void *arg, int narg); Note: There is no glibc wrapper for this system call; see NOTES. DESCRIPTION The IA-64-specific perfmonctl() system call provides an interface to the PMU (performance monitoring unit). The PMU consists of PMD…

NAME perf_event_open – set up performance monitoring SYNOPSIS #include <linux/hw_breakpoint.h> #include <linux/perf_event.h> int perf_event_open(struct perf_event_attr *attr, pid_t pid, int cpu, int group_fd, unsigned long flags); Note: There is no glibc wrapper for this system call; see NOTES. DESCRIPTION Given a list of parameters, perf_event_open() returns a file descriptor, for use in subsequent system calls (read(2),…

NAME pciconfig_read, pciconfig_write, pciconfig_iobase – pci device information handling SYNOPSIS #include <pci.h> int pciconfig_read(unsigned long bus, unsigned long dfn, unsigned long off, unsigned long len, void *buf); int pciconfig_write(unsigned long bus, unsigned long dfn, unsigned long off, unsigned long len, void *buf); int pciconfig_iobase(long which, unsigned long bus, unsigned long devfn); DESCRIPTION Most of the…

NAME pciconfig_read, pciconfig_write, pciconfig_iobase – pci device information handling SYNOPSIS #include <pci.h> int pciconfig_read(unsigned long bus, unsigned long dfn, unsigned long off, unsigned long len, void *buf); int pciconfig_write(unsigned long bus, unsigned long dfn, unsigned long off, unsigned long len, void *buf); int pciconfig_iobase(long which, unsigned long bus, unsigned long devfn); DESCRIPTION Most of the…

NAME pciconfig_read, pciconfig_write, pciconfig_iobase – pci device information handling SYNOPSIS #include <pci.h> int pciconfig_read(unsigned long bus, unsigned long dfn, unsigned long off, unsigned long len, void *buf); int pciconfig_write(unsigned long bus, unsigned long dfn, unsigned long off, unsigned long len, void *buf); int pciconfig_iobase(long which, unsigned long bus, unsigned long devfn); DESCRIPTION Most of the…

NAME pause – wait for signal SYNOPSIS #include <unistd.h> int pause(void); DESCRIPTION pause() causes the calling process (or thread) to sleep until a signal is delivered that either terminates the process or causes the invocation of a signal-catching function. RETURN VALUE pause() returns only when a signal was caught and the signal-catching function returned. In…

NAME path_resolution – how a pathname is resolved to a file DESCRIPTION Some UNIX/Linux system calls have as parameter one or more filenames. A filename (or pathname) is resolved as follows. Step 1: Start of the resolution process If the pathname starts with the ‘/’ character, the starting lookup directory is the root directory of…

NAME outb, outw, outl, outsb, outsw, outsl, inb, inw, inl, insb, insw, insl, outb_p, outw_p, outl_p, inb_p, inw_p, inl_p – port I/O SYNOPSIS #include <sys/io.h> unsigned char inb(unsigned short port); unsigned char inb_p(unsigned short port); unsigned short inw(unsigned short port); unsigned short inw_p(unsigned short port); unsigned int inl(unsigned short port); unsigned int inl_p(unsigned short port);…

NAME outb, outw, outl, outsb, outsw, outsl, inb, inw, inl, insb, insw, insl, outb_p, outw_p, outl_p, inb_p, inw_p, inl_p – port I/O SYNOPSIS #include <sys/io.h> unsigned char inb(unsigned short port); unsigned char inb_p(unsigned short port); unsigned short inw(unsigned short port); unsigned short inw_p(unsigned short port); unsigned int inl(unsigned short port); unsigned int inl_p(unsigned short port);…

NAME outb, outw, outl, outsb, outsw, outsl, inb, inw, inl, insb, insw, insl, outb_p, outw_p, outl_p, inb_p, inw_p, inl_p – port I/O SYNOPSIS #include <sys/io.h> unsigned char inb(unsigned short port); unsigned char inb_p(unsigned short port); unsigned short inw(unsigned short port); unsigned short inw_p(unsigned short port); unsigned int inl(unsigned short port); unsigned int inl_p(unsigned short port);…

NAME outb, outw, outl, outsb, outsw, outsl, inb, inw, inl, insb, insw, insl, outb_p, outw_p, outl_p, inb_p, inw_p, inl_p – port I/O SYNOPSIS #include <sys/io.h> unsigned char inb(unsigned short port); unsigned char inb_p(unsigned short port); unsigned short inw(unsigned short port); unsigned short inw_p(unsigned short port); unsigned int inl(unsigned short port); unsigned int inl_p(unsigned short port);…

NAME outb, outw, outl, outsb, outsw, outsl, inb, inw, inl, insb, insw, insl, outb_p, outw_p, outl_p, inb_p, inw_p, inl_p – port I/O SYNOPSIS #include <sys/io.h> unsigned char inb(unsigned short port); unsigned char inb_p(unsigned short port); unsigned short inw(unsigned short port); unsigned short inw_p(unsigned short port); unsigned int inl(unsigned short port); unsigned int inl_p(unsigned short port);…

NAME outb, outw, outl, outsb, outsw, outsl, inb, inw, inl, insb, insw, insl, outb_p, outw_p, outl_p, inb_p, inw_p, inl_p – port I/O SYNOPSIS #include <sys/io.h> unsigned char inb(unsigned short port); unsigned char inb_p(unsigned short port); unsigned short inw(unsigned short port); unsigned short inw_p(unsigned short port); unsigned int inl(unsigned short port); unsigned int inl_p(unsigned short port);…

NAME outb, outw, outl, outsb, outsw, outsl, inb, inw, inl, insb, insw, insl, outb_p, outw_p, outl_p, inb_p, inw_p, inl_p – port I/O SYNOPSIS #include <sys/io.h> unsigned char inb(unsigned short port); unsigned char inb_p(unsigned short port); unsigned short inw(unsigned short port); unsigned short inw_p(unsigned short port); unsigned int inl(unsigned short port); unsigned int inl_p(unsigned short port);…

NAME outb, outw, outl, outsb, outsw, outsl, inb, inw, inl, insb, insw, insl, outb_p, outw_p, outl_p, inb_p, inw_p, inl_p – port I/O SYNOPSIS #include <sys/io.h> unsigned char inb(unsigned short port); unsigned char inb_p(unsigned short port); unsigned short inw(unsigned short port); unsigned short inw_p(unsigned short port); unsigned int inl(unsigned short port); unsigned int inl_p(unsigned short port);…

NAME outb, outw, outl, outsb, outsw, outsl, inb, inw, inl, insb, insw, insl, outb_p, outw_p, outl_p, inb_p, inw_p, inl_p – port I/O SYNOPSIS #include <sys/io.h> unsigned char inb(unsigned short port); unsigned char inb_p(unsigned short port); unsigned short inw(unsigned short port); unsigned short inw_p(unsigned short port); unsigned int inl(unsigned short port); unsigned int inl_p(unsigned short port);…