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author | Robin H. Johnson <robbat2@gentoo.org> | 2015-08-08 13:49:04 -0700 |
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committer | Robin H. Johnson <robbat2@gentoo.org> | 2015-08-08 17:38:18 -0700 |
commit | 56bd759df1d0c750a065b8c845e93d5dfa6b549d (patch) | |
tree | 3f91093cdb475e565ae857f1c5a7fd339e2d781e /dev-util/lockrun | |
download | gentoo-56bd759df1d0c750a065b8c845e93d5dfa6b549d.tar.gz gentoo-56bd759df1d0c750a065b8c845e93d5dfa6b549d.tar.bz2 gentoo-56bd759df1d0c750a065b8c845e93d5dfa6b549d.zip |
proj/gentoo: Initial commit
This commit represents a new era for Gentoo:
Storing the gentoo-x86 tree in Git, as converted from CVS.
This commit is the start of the NEW history.
Any historical data is intended to be grafted onto this point.
Creation process:
1. Take final CVS checkout snapshot
2. Remove ALL ChangeLog* files
3. Transform all Manifests to thin
4. Remove empty Manifests
5. Convert all stale $Header$/$Id$ CVS keywords to non-expanded Git $Id$
5.1. Do not touch files with -kb/-ko keyword flags.
Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>
X-Thanks: Alec Warner <antarus@gentoo.org> - did the GSoC 2006 migration tests
X-Thanks: Robin H. Johnson <robbat2@gentoo.org> - infra guy, herding this project
X-Thanks: Nguyen Thai Ngoc Duy <pclouds@gentoo.org> - Former Gentoo developer, wrote Git features for the migration
X-Thanks: Brian Harring <ferringb@gentoo.org> - wrote much python to improve cvs2svn
X-Thanks: Rich Freeman <rich0@gentoo.org> - validation scripts
X-Thanks: Patrick Lauer <patrick@gentoo.org> - Gentoo dev, running new 2014 work in migration
X-Thanks: Michał Górny <mgorny@gentoo.org> - scripts, QA, nagging
X-Thanks: All of other Gentoo developers - many ideas and lots of paint on the bikeshed
Diffstat (limited to 'dev-util/lockrun')
-rw-r--r-- | dev-util/lockrun/files/lockrun.c-20120508 | 294 | ||||
-rw-r--r-- | dev-util/lockrun/lockrun-20120508.ebuild | 31 | ||||
-rw-r--r-- | dev-util/lockrun/metadata.xml | 7 |
3 files changed, 332 insertions, 0 deletions
diff --git a/dev-util/lockrun/files/lockrun.c-20120508 b/dev-util/lockrun/files/lockrun.c-20120508 new file mode 100644 index 000000000000..0b0034d7bc25 --- /dev/null +++ b/dev-util/lockrun/files/lockrun.c-20120508 @@ -0,0 +1,294 @@ +/* + * $Id$ + * + * written by : Stephen J. Friedl + * Software Consultant + * steve@unixwiz.net + * http://www.unixwiz.net/tools/ + * + * =================================================================== + * ======== This software is in the public domain, and can be ======== + * ======== used by anybody for any purpose ======== + * =================================================================== + * + * Lockrun: This program is used to launch a program out with a lockout + * so that only one can run at a time. It's mainly intended for use out + * of cron so that our five-minute running jobs which run long don't get + * walked on. We find this a *lot* with Cacti jobs which just get hung + * up: it's better to miss a polling period than to stack them up and + * slow each other down. + * + * So we use a file which is used for locking: this program attempts to + * lock the file, and if the lock exists, we have to either exit with + * an error, or wait for it to release. + * + * lockrun --lockfile=FILE -- my command here + * + * COMMAND LINE + * ------------ + * + * --lockfile=F + * + * Specify the name of a file which is used for locking. The file is + * created if necessary (with mode 0666), and no I/O of any kind is + * done. The file is never removed. + * + * --maxtime=N + * + * The script being controlled should run for no more than <N> seconds, + * and if it's beyond that time, we should report it to the standard + * error (which probably gets routed to the user via cron's email). + * + * --wait + * + * When a lock is hit, we normally exit with error, but --wait causes + * it to loop until the lock is released. + * + * --verbose + * + * Show a bit more runtime debugging. + * + * --quiet + * + * Don't show "run is locked" error if things are busy; keeps cron from + * overwhelming you with messages if lockrun overlap is not uncommon. + * + * -- + * + * Mark the end of the options: the command to run follows. + * + */ + +#include <stdio.h> +#include <stdarg.h> +#include <errno.h> +#include <stdlib.h> +#include <string.h> +#include <fcntl.h> +#include <unistd.h> +#include <time.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <sys/file.h> + +#ifndef __GNUC__ +# define __attribute__(x) /* nothing */ +#endif + + +#define STRMATCH(a,b) (strcmp((a),(b)) == 0) + +#define UNUSED_PARAMETER(v) ((void)(v)) + +#define TRUE 1 +#define FALSE 0 + +static const char *lockfile = 0; +static int wait_for_lock = FALSE; +static mode_t openmode = 0666; +static int sleeptime = 10; /* seconds */ +static int Verbose = FALSE; +static int Maxtime = 0; +static int Quiet = FALSE; + +static char *getarg(char *opt, char ***pargv); + +static void die(const char *format, ...) + __attribute__((noreturn)) + __attribute__((format(printf, 1, 2))); + +#ifdef __sun +# define WAIT_AND_LOCK(fd) lockf(fd, F_TLOCK,0) +#else +# define WAIT_AND_LOCK(fd) flock(fd, LOCK_EX | LOCK_NB) +#endif + +int main(int argc, char **argv) +{ + char *Argv0 = *argv; + int rc; + int lfd; + pid_t childpid; + time_t starttime; + + UNUSED_PARAMETER(argc); + + time(&starttime); + + for ( argv++ ; *argv ; argv++ ) + { + char *arg = *argv; + char *opt = strchr(arg, '='); + + /* the -- token marks the end of the list */ + + if ( strcmp(*argv, "--") == 0 ) + { + argv++; + break; + } + + if (opt) *opt++ = '\0'; /* pick off the =VALUE part */ + + if ( STRMATCH(arg, "-L") || STRMATCH(arg, "--lockfile")) + { + lockfile = getarg(opt, &argv); + } + + else if ( STRMATCH(arg, "-W") || STRMATCH(arg, "--wait")) + { + wait_for_lock = TRUE; + } + + else if ( STRMATCH(arg, "-S") || STRMATCH(arg, "--sleep")) + { + sleeptime = atoi(getarg(opt, &argv)); + } + + else if ( STRMATCH(arg, "-T") || STRMATCH(arg, "--maxtime")) + { + Maxtime = atoi(getarg(opt, &argv)); + } + + else if ( STRMATCH(arg, "-V") || STRMATCH(arg, "--verbose")) + { + Verbose++; + } + + else if ( STRMATCH(arg, "-q") || STRMATCH(arg, "--quiet")) + { + Quiet = TRUE; + } + + else + { + die("ERROR: \"%s\" is an invalid cmdline param", arg); + } + } + + /*---------------------------------------------------------------- + * SANITY CHECKING + * + * Make sure that we have all the parameters we require + */ + if (*argv == 0) + die("ERROR: missing command to %s (must follow \"--\" marker) ", Argv0); + + if (lockfile == 0) + die("ERROR: missing --lockfile=F parameter"); + + /*---------------------------------------------------------------- + * Open or create the lockfile, then try to acquire the lock. If + * the lock is acquired immediately (==0), then we're done, but + * if the lock is not available, we have to wait for it. + * + * We can either loop trying for the lock (for --wait), or exit + * with error. + */ + + if ( (lfd = open(lockfile, O_RDWR|O_CREAT, openmode)) < 0) + die("ERROR: cannot open(%s) [err=%s]", lockfile, strerror(errno)); + + while ( WAIT_AND_LOCK(lfd) != 0 ) + { + if ( ! wait_for_lock ) + { + if ( Quiet) + exit(EXIT_SUCCESS); + else + die("ERROR: cannot launch %s - run is locked", argv[0]); + } + + /* waiting */ + if ( Verbose ) printf("(locked: sleeping %d secs)\n", sleeptime); + + sleep(sleeptime); + } + + fflush(stdout); + + /* run the child */ + + + if ( (childpid = fork()) == 0 ) + { + close(lfd); // don't need the lock file + + execvp(argv[0], argv); + } + else if ( childpid > 0 ) + { + time_t endtime; + pid_t pid; + + if ( Verbose ) + printf("Waiting for process %ld\n", (long) childpid); + + pid = waitpid(childpid, &rc, 0); + + time(&endtime); + + endtime -= starttime; + + if ( Verbose || (Maxtime > 0 && endtime > Maxtime) ) + printf("pid %d exited with status %d (time=%ld sec)\n", pid, rc, endtime); + } + else + { + die("ERROR: cannot fork [%s]", strerror(errno)); + } + + exit(rc); +} + + +/*! \fn static char *getarg(char *opt, char ***pargv) + * \brief A function to parse calling parameters + * + * This is a helper for the main arg-processing loop: we work with + * options which are either of the form "-X=FOO" or "-X FOO"; we + * want an easy way to handle either one. + * + * The idea is that if the parameter has an = sign, we use the rest + * of that same argv[X] string, otherwise we have to get the *next* + * argv[X] string. But it's an error if an option-requiring param + * is at the end of the list with no argument to follow. + * + * The option name could be of the form "-C" or "--conf", but we + * grab it from the existing argv[] so we can report it well. + * + * \return character pointer to the argument + * + */ +static char *getarg(char *opt, char ***pargv) +{ + const char *const optname = **pargv; + + /* option already set? */ + if (opt) return opt; + + /* advance to next argv[] and try that one */ + if ((opt = *++(*pargv)) == 0) + die("ERROR: option %s requires a parameter", optname); + + return opt; +} + +/* + * die() + * + * Given a printf-style argument list, format it to the standard error, + * append a newline, then exit with error status. + */ + +static void die(const char *format, ...) +{ +va_list args; + + va_start(args, format); + vfprintf(stderr, format, args); + putc('\n', stderr); + va_end(args); + + exit(EXIT_FAILURE); +} diff --git a/dev-util/lockrun/lockrun-20120508.ebuild b/dev-util/lockrun/lockrun-20120508.ebuild new file mode 100644 index 000000000000..5e7e1ef7e0d5 --- /dev/null +++ b/dev-util/lockrun/lockrun-20120508.ebuild @@ -0,0 +1,31 @@ +# Copyright 1999-2012 Gentoo Foundation +# Distributed under the terms of the GNU General Public License v2 +# $Id$ + +EAPI=4 +inherit toolchain-funcs + +DESCRIPTION="Lockrun - runs cronjobs with overrun protection" +HOMEPAGE="http://www.unixwiz.net/tools/lockrun.html" + +LICENSE="public-domain" +SLOT="0" +KEYWORDS="amd64 hppa x86" +IUSE="" + +S="${WORKDIR}" + +src_unpack() { + cp "${FILESDIR}"/${PN}.c-${PV} "${S}"/${PN}.c || die + cp "${FILESDIR}"/${PN}.c-${PV} "${S}"/README || die +} + +src_compile() { + emake CC=$(tc-getCC) ${PN} + sed -i README -e '60q;s|^ \*||g' || die +} + +src_install () { + dobin ${PN} + dodoc README +} diff --git a/dev-util/lockrun/metadata.xml b/dev-util/lockrun/metadata.xml new file mode 100644 index 000000000000..a40624fba8f0 --- /dev/null +++ b/dev-util/lockrun/metadata.xml @@ -0,0 +1,7 @@ +<?xml version="1.0" encoding="UTF-8"?> +<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd"> +<pkgmetadata> +<maintainer> + <email>maintainer-needed@gentoo.org</email> +</maintainer> +</pkgmetadata> |