zsh/zdharma-continuum.zconvey
1
0
Fork 0
mirror of https://github.com/zdharma-continuum/zconvey.git synced 2026-09-10 07:06:21 -04:00
Code Issues Actions Packages Projects Releases Wiki Activity

Initial commit: flock.c compiles and runs on Darwin

Browse source
This commit is contained in:
Sebastian Gniazdowski 2016-09-10 18:23:31 +02:00
commit 167723b800
8 changed files with 1186 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

339
LICENSE Normal file
View file

@ -0,0 +1,339 @@
GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users. This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it. (Some other Free Software Foundation software is covered by
the GNU Lesser General Public License instead.) You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it
in new free programs; and that you know you can do these things.
To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it.
For example, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients all the rights that
you have. You must make sure that they, too, receive or can get the
source code. And you must show them these terms so they know their
rights.
We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.
Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
software. If the software is modified by someone else and passed on, we
want its recipients to know that what they have is not the original, so
that any problems introduced by others will not reflect on the original
authors' reputations.
Finally, any free program is threatened constantly by software
patents. We wish to avoid the danger that redistributors of a free
program will individually obtain patent licenses, in effect making the
program proprietary. To prevent this, we have made it clear that any
patent must be licensed for everyone's free use or not licensed at all.
The precise terms and conditions for copying, distribution and
modification follow.
GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other work which contains
a notice placed by the copyright holder saying it may be distributed
under the terms of this General Public License. The "Program", below,
refers to any such program or work, and a "work based on the Program"
means either the Program or any derivative work under copyright law:
that is to say, a work containing the Program or a portion of it,
either verbatim or with modifications and/or translated into another
language. (Hereinafter, translation is included without limitation in
the term "modification".) Each licensee is addressed as "you".
Activities other than copying, distribution and modification are not
covered by this License; they are outside its scope. The act of
running the Program is not restricted, and the output from the Program
is covered only if its contents constitute a work based on the
Program (independent of having been made by running the Program).
Whether that is true depends on what the Program does.
1. You may copy and distribute verbatim copies of the Program's
source code as you receive it, in any medium, provided that you
conspicuously and appropriately publish on each copy an appropriate
copyright notice and disclaimer of warranty; keep intact all the
notices that refer to this License and to the absence of any warranty;
and give any other recipients of the Program a copy of this License
along with the Program.
You may charge a fee for the physical act of transferring a copy, and
you may at your option offer warranty protection in exchange for a fee.
2. You may modify your copy or copies of the Program or any portion
of it, thus forming a work based on the Program, and copy and
distribute such modifications or work under the terms of Section 1
above, provided that you also meet all of these conditions:
a) You must cause the modified files to carry prominent notices
stating that you changed the files and the date of any change.
b) You must cause any work that you distribute or publish, that in
whole or in part contains or is derived from the Program or any
part thereof, to be licensed as a whole at no charge to all third
parties under the terms of this License.
c) If the modified program normally reads commands interactively
when run, you must cause it, when started running for such
interactive use in the most ordinary way, to print or display an
announcement including an appropriate copyright notice and a
notice that there is no warranty (or else, saying that you provide
a warranty) and that users may redistribute the program under
these conditions, and telling the user how to view a copy of this
License. (Exception: if the Program itself is interactive but
does not normally print such an announcement, your work based on
the Program is not required to print an announcement.)
These requirements apply to the modified work as a whole. If
identifiable sections of that work are not derived from the Program,
and can be reasonably considered independent and separate works in
themselves, then this License, and its terms, do not apply to those
sections when you distribute them as separate works. But when you
distribute the same sections as part of a whole which is a work based
on the Program, the distribution of the whole must be on the terms of
this License, whose permissions for other licensees extend to the
entire whole, and thus to each and every part regardless of who wrote it.
Thus, it is not the intent of this section to claim rights or contest
your rights to work written entirely by you; rather, the intent is to
exercise the right to control the distribution of derivative or
collective works based on the Program.
In addition, mere aggregation of another work not based on the Program
with the Program (or with a work based on the Program) on a volume of
a storage or distribution medium does not bring the other work under
the scope of this License.
3. You may copy and distribute the Program (or a work based on it,
under Section 2) in object code or executable form under the terms of
Sections 1 and 2 above provided that you also do one of the following:
a) Accompany it with the complete corresponding machine-readable
source code, which must be distributed under the terms of Sections
1 and 2 above on a medium customarily used for software interchange; or,
b) Accompany it with a written offer, valid for at least three
years, to give any third party, for a charge no more than your
cost of physically performing source distribution, a complete
machine-readable copy of the corresponding source code, to be
distributed under the terms of Sections 1 and 2 above on a medium
customarily used for software interchange; or,
c) Accompany it with the information you received as to the offer
to distribute corresponding source code. (This alternative is
allowed only for noncommercial distribution and only if you
received the program in object code or executable form with such
an offer, in accord with Subsection b above.)
The source code for a work means the preferred form of the work for
making modifications to it. For an executable work, complete source
code means all the source code for all modules it contains, plus any
associated interface definition files, plus the scripts used to
control compilation and installation of the executable. However, as a
special exception, the source code distributed need not include
anything that is normally distributed (in either source or binary
form) with the major components (compiler, kernel, and so on) of the
operating system on which the executable runs, unless that component
itself accompanies the executable.
If distribution of executable or object code is made by offering
access to copy from a designated place, then offering equivalent
access to copy the source code from the same place counts as
distribution of the source code, even though third parties are not
compelled to copy the source along with the object code.
4. You may not copy, modify, sublicense, or distribute the Program
except as expressly provided under this License. Any attempt
otherwise to copy, modify, sublicense or distribute the Program is
void, and will automatically terminate your rights under this License.
However, parties who have received copies, or rights, from you under
this License will not have their licenses terminated so long as such
parties remain in full compliance.
5. You are not required to accept this License, since you have not
signed it. However, nothing else grants you permission to modify or
distribute the Program or its derivative works. These actions are
prohibited by law if you do not accept this License. Therefore, by
modifying or distributing the Program (or any work based on the
Program), you indicate your acceptance of this License to do so, and
all its terms and conditions for copying, distributing or modifying
the Program or works based on it.
6. Each time you redistribute the Program (or any work based on the
Program), the recipient automatically receives a license from the
original licensor to copy, distribute or modify the Program subject to
these terms and conditions. You may not impose any further
restrictions on the recipients' exercise of the rights granted herein.
You are not responsible for enforcing compliance by third parties to
this License.
7. If, as a consequence of a court judgment or allegation of patent
infringement or for any other reason (not limited to patent issues),
conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot
distribute so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you
may not distribute the Program at all. For example, if a patent
license would not permit royalty-free redistribution of the Program by
all those who receive copies directly or indirectly through you, then
the only way you could satisfy both it and this License would be to
refrain entirely from distribution of the Program.
If any portion of this section is held invalid or unenforceable under
any particular circumstance, the balance of the section is intended to
apply and the section as a whole is intended to apply in other
circumstances.
It is not the purpose of this section to induce you to infringe any
patents or other property right claims or to contest validity of any
such claims; this section has the sole purpose of protecting the
integrity of the free software distribution system, which is
implemented by public license practices. Many people have made
generous contributions to the wide range of software distributed
through that system in reliance on consistent application of that
system; it is up to the author/donor to decide if he or she is willing
to distribute software through any other system and a licensee cannot
impose that choice.
This section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.
8. If the distribution and/or use of the Program is restricted in
certain countries either by patents or by copyrighted interfaces, the
original copyright holder who places the Program under this License
may add an explicit geographical distribution limitation excluding
those countries, so that distribution is permitted only in or among
countries not thus excluded. In such case, this License incorporates
the limitation as if written in the body of this License.
9. The Free Software Foundation may publish revised and/or new versions
of the General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the Program
specifies a version number of this License which applies to it and "any
later version", you have the option of following the terms and conditions
either of that version or of any later version published by the Free
Software Foundation. If the Program does not specify a version number of
this License, you may choose any version ever published by the Free Software
Foundation.
10. If you wish to incorporate parts of the Program into other free
programs whose distribution conditions are different, write to the author
to ask for permission. For software which is copyrighted by the Free
Software Foundation, write to the Free Software Foundation; we sometimes
make exceptions for this. Our decision will be guided by the two goals
of preserving the free status of all derivatives of our free software and
of promoting the sharing and reuse of software generally.
NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
REPAIR OR CORRECTION.
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.

2
README.md Normal file
View file

@ -0,0 +1,2 @@
## Introduction

4
myflock/Makefile Normal file
View file

@ -0,0 +1,4 @@
all: flock
flock: flock.c c.h nls.h timer.h
gcc -Wall flock.c -o flock

356
myflock/c.h Normal file
View file

@ -0,0 +1,356 @@
/*
* Fundamental C definitions.
*/
#ifndef UTIL_LINUX_C_H
#define UTIL_LINUX_C_H
#include <limits.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <unistd.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#ifdef HAVE_ERR_H
# include <err.h>
#endif
#ifdef HAVE_SYS_SYSMACROS_H
# include <sys/sysmacros.h> /* for major, minor */
#endif
/*
* Compiler-specific stuff
*/
#ifndef __GNUC_PREREQ
# if defined __GNUC__ && defined __GNUC_MINOR__
# define __GNUC_PREREQ(maj, min) \
((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
# else
# define __GNUC_PREREQ(maj, min) 0
# endif
#endif
#ifdef __GNUC__
/* &a[0] degrades to a pointer: a different type from an array */
# define __must_be_array(a) \
UL_BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(__typeof__(a), __typeof__(&a[0])))
# define ignore_result(x) __extension__ ({ \
__typeof__(x) __dummy __attribute__((__unused__)) = (x); (void) __dummy; \
})
#else /* !__GNUC__ */
# define __must_be_array(a) 0
# define __attribute__(_arg_)
# define ignore_result(x) ((void) (x))
#endif /* !__GNUC__ */
/*
* Function attributes
*/
#ifndef __ul_alloc_size
# if __GNUC_PREREQ (4, 3)
# define __ul_alloc_size(s) __attribute__((alloc_size(s), warn_unused_result))
# else
# define __ul_alloc_size(s)
# endif
#endif
#ifndef __ul_calloc_size
# if __GNUC_PREREQ (4, 3)
# define __ul_calloc_size(n, s) __attribute__((alloc_size(n, s), warn_unused_result))
# else
# define __ul_calloc_size(n, s)
# endif
#endif
/*
* Force a compilation error if condition is true, but also produce a
* result (of value 0 and type size_t), so the expression can be used
* e.g. in a structure initializer (or wherever else comma expressions
* aren't permitted).
*/
#define UL_BUILD_BUG_ON_ZERO(e) __extension__ (sizeof(struct { int:-!!(e); }))
#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))
#ifndef ARRAY_SIZE
# define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
#endif
#ifndef PATH_MAX
# define PATH_MAX 4096
#endif
#ifndef TRUE
# define TRUE 1
#endif
#ifndef FALSE
# define FALSE 0
#endif
#ifndef min
# define min(x, y) __extension__ ({ \
__typeof__(x) _min1 = (x); \
__typeof__(y) _min2 = (y); \
(void) (&_min1 == &_min2); \
_min1 < _min2 ? _min1 : _min2; })
#endif
#ifndef max
# define max(x, y) __extension__ ({ \
__typeof__(x) _max1 = (x); \
__typeof__(y) _max2 = (y); \
(void) (&_max1 == &_max2); \
_max1 > _max2 ? _max1 : _max2; })
#endif
#ifndef cmp_numbers
# define cmp_numbers(x, y) __extension__ ({ \
__typeof__(x) _a = (x); \
__typeof__(y) _b = (y); \
(void) (&_a == &_b); \
_a == _b ? 0 : _a > _b ? 1 : -1; })
#endif
#ifndef offsetof
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
#endif
#ifndef container_of
#define container_of(ptr, type, member) __extension__ ({ \
const __typeof__( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
#endif
#ifndef HAVE_PROGRAM_INVOCATION_SHORT_NAME
# ifdef HAVE___PROGNAME
extern char *__progname;
# define program_invocation_short_name __progname
# else
# ifdef HAVE_GETEXECNAME
# define program_invocation_short_name \
prog_inv_sh_nm_from_file(getexecname(), 0)
# else
# define program_invocation_short_name \
prog_inv_sh_nm_from_file(__FILE__, 1)
# endif
static char prog_inv_sh_nm_buf[256];
static inline char *
prog_inv_sh_nm_from_file(char *f, char stripext)
{
char *t;
if ((t = strrchr(f, '/')) != NULL)
t++;
else
t = f;
strncpy(prog_inv_sh_nm_buf, t, sizeof(prog_inv_sh_nm_buf) - 1);
prog_inv_sh_nm_buf[sizeof(prog_inv_sh_nm_buf) - 1] = '\0';
if (stripext && (t = strrchr(prog_inv_sh_nm_buf, '.')) != NULL)
*t = '\0';
return prog_inv_sh_nm_buf;
}
# endif
#endif
#ifndef HAVE_ERR_H
static inline void
errmsg(char doexit, int excode, char adderr, const char *fmt, ...)
{
fprintf(stderr, "%s: ", program_invocation_short_name);
if (fmt != NULL) {
va_list argp;
va_start(argp, fmt);
vfprintf(stderr, fmt, argp);
va_end(argp);
if (adderr)
fprintf(stderr, ": ");
}
if (adderr)
fprintf(stderr, "%m");
fprintf(stderr, "\n");
if (doexit)
exit(excode);
}
#ifndef HAVE_ERR
# define err(E, FMT...) errmsg(1, E, 1, FMT)
#endif
#ifndef HAVE_ERRX
# define errx(E, FMT...) errmsg(1, E, 0, FMT)
#endif
#ifndef HAVE_WARN
# define warn(FMT...) errmsg(0, 0, 1, FMT)
#endif
#ifndef HAVE_WARNX
# define warnx(FMT...) errmsg(0, 0, 0, FMT)
#endif
#endif /* !HAVE_ERR_H */
static inline __attribute__((const)) int is_power_of_2(unsigned long num)
{
return (num != 0 && ((num & (num - 1)) == 0));
}
#ifndef HAVE_LOFF_T
typedef int64_t loff_t;
#endif
#if !defined(HAVE_DIRFD) && (!defined(HAVE_DECL_DIRFD) || HAVE_DECL_DIRFD == 0) && defined(HAVE_DIR_DD_FD)
#include <sys/types.h>
#include <dirent.h>
static inline int dirfd(DIR *d)
{
return d->dd_fd;
}
#endif
/*
* Fallback defines for old versions of glibc
*/
#include <fcntl.h>
#ifdef O_CLOEXEC
#define UL_CLOEXECSTR "e"
#else
#define UL_CLOEXECSTR ""
#endif
#ifndef O_CLOEXEC
#define O_CLOEXEC 0
#endif
#ifdef __FreeBSD_kernel__
#ifndef F_DUPFD_CLOEXEC
#define F_DUPFD_CLOEXEC 17 /* Like F_DUPFD, but FD_CLOEXEC is set */
#endif
#endif
#ifndef AI_ADDRCONFIG
#define AI_ADDRCONFIG 0x0020
#endif
#ifndef IUTF8
#define IUTF8 0040000
#endif
/*
* MAXHOSTNAMELEN replacement
*/
static inline size_t get_hostname_max(void)
{
long len = sysconf(_SC_HOST_NAME_MAX);
if (0 < len)
return len;
#ifdef MAXHOSTNAMELEN
return MAXHOSTNAMELEN;
#elif HOST_NAME_MAX
return HOST_NAME_MAX;
#endif
return 64;
}
/*
* The usleep function was marked obsolete in POSIX.1-2001 and was removed
* in POSIX.1-2008. It was replaced with nanosleep() that provides more
* advantages (like no interaction with signals and other timer functions).
*/
#include <time.h>
/*
* Constant strings for usage() functions. For more info see
* Documentation/howto-usage-function.txt and disk-utils/delpart.c
*/
#define USAGE_HEADER _("\nUsage:\n")
#define USAGE_OPTIONS _("\nOptions:\n")
#define USAGE_SEPARATOR "\n"
#define USAGE_HELP _(" -h, --help display this help and exit\n")
#define USAGE_VERSION _(" -V, --version output version information and exit\n")
#define USAGE_MAN_TAIL(_man) _("\nFor more details see %s.\n"), _man
#define UTIL_LINUX_VERSION _("%s from %s\n"), program_invocation_short_name, PACKAGE_STRING
/*
* scanf modifiers for "strings allocation"
*/
#ifdef HAVE_SCANF_MS_MODIFIER
#define UL_SCNsA "%ms"
#elif defined(HAVE_SCANF_AS_MODIFIER)
#define UL_SCNsA "%as"
#endif
/*
* seek stuff
*/
#ifndef SEEK_DATA
# define SEEK_DATA 3
#endif
#ifndef SEEK_HOLE
# define SEEK_HOLE 4
#endif
/*
* Macros to convert #define'itions to strings, for example
* #define XYXXY 42
* printf ("%s=%s\n", stringify(XYXXY), stringify_value(XYXXY));
*/
#define stringify_value(s) stringify(s)
#define stringify(s) #s
/*
* UL_ASAN_BLACKLIST is a macro to tell AddressSanitizer (a compile-time
* instrumentation shipped with Clang and GCC) to not instrument the
* annotated function. Furthermore, it will prevent the compiler from
* inlining the function because inlining currently breaks the blacklisting
* mechanism of AddressSanitizer.
*/
#if defined(__has_feature)
# if __has_feature(address_sanitizer)
# define UL_ASAN_BLACKLIST __attribute__((noinline)) __attribute__((no_sanitize_memory)) __attribute__((no_sanitize_address))
# else
# define UL_ASAN_BLACKLIST /* nothing */
# endif
#else
# define UL_ASAN_BLACKLIST /* nothing */
#endif
/*
* Note that sysconf(_SC_GETPW_R_SIZE_MAX) returns *initial* suggested size for
* pwd buffer and in some cases it is not large enough. See POSIX and
* getpwnam_r man page for more details.
*/
#define UL_GETPW_BUFSIZ (16 * 1024)
/*
* Darwin or other BSDs may only have MAP_ANON. To get it on Darwin we must
* define _DARWIN_C_SOURCE before including sys/mman.h. We do this in config.h.
*/
#if !defined MAP_ANONYMOUS && defined MAP_ANON
# define MAP_ANONYMOUS (MAP_ANON)
#endif
#endif /* UTIL_LINUX_C_H */

318
myflock/flock.c Normal file
View file

@ -0,0 +1,318 @@
/* Copyright 2003-2005 H. Peter Anvin - All Rights Reserved
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall
* be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <paths.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include "c.h"
#include "nls.h"
//#include "strutils.h"
//#include "closestream.h"
//#include "monotonic.h"
static void __attribute__((__noreturn__)) usage(int ex)
{
fprintf(stderr, USAGE_HEADER);
fprintf(stderr,
_(" %1$s [options] <file>|<directory> <command> [<argument>...]\n"
" %1$s [options] <file>|<directory> -c <command>\n"
" %1$s [options] <file descriptor number>\n"),
program_invocation_short_name);
fputs(USAGE_SEPARATOR, stderr);
fputs(_("Manage file locks from shell scripts.\n"), stderr);
fputs(USAGE_OPTIONS, stderr);
fputs(_( " -s, --shared get a shared lock\n"), stderr);
fputs(_( " -x, --exclusive get an exclusive lock (default)\n"), stderr);
fputs(_( " -u, --unlock remove a lock\n"), stderr);
fputs(_( " -n, --nonblock fail rather than wait\n"), stderr);
fputs(_( " -o, --close close file descriptor before running command\n"), stderr);
fputs(_( " -c, --command <command> run a single command string through the shell\n"), stderr);
fputs(_( " -F, --no-fork execute command without forking\n"), stderr);
fputs(_( " --verbose increase verbosity\n"), stderr);
fprintf(stderr, USAGE_SEPARATOR);
fprintf(stderr, USAGE_HELP);
fprintf(stderr, USAGE_VERSION);
fprintf(stderr, USAGE_MAN_TAIL("flock(1)"));
exit(ex);
}
static sig_atomic_t timeout_expired = 0;
static void timeout_handler(int sig __attribute__((__unused__)),
siginfo_t *info,
void *context __attribute__((__unused__)))
{
if (info->si_code == SI_TIMER)
timeout_expired = 1;
}
static int open_file(const char *filename, int *flags)
{
int fd;
int fl = *flags == 0 ? O_RDONLY : *flags;
errno = 0;
fl |= O_NOCTTY | O_CREAT;
fd = open(filename, fl, 0666);
/* Linux doesn't like O_CREAT on a directory, even though it
* should be a no-op; POSIX doesn't allow O_RDWR or O_WRONLY
*/
if (fd < 0 && errno == EISDIR) {
fl = O_RDONLY | O_NOCTTY;
fd = open(filename, fl);
}
if (fd < 0) {
warn(_("cannot open lock file %s"), filename);
if (errno == ENOMEM || errno == EMFILE || errno == ENFILE)
exit(EX_OSERR);
if (errno == EROFS || errno == ENOSPC)
exit(EX_CANTCREAT);
exit(EX_NOINPUT);
}
*flags = fl;
return fd;
}
int main(int argc, char *argv[])
{
int have_timeout = 0;
int type = LOCK_EX;
int block = 0;
int open_flags = 0;
int fd = -1;
int opt, ix;
int do_close = 0;
int no_fork = 0;
int status;
int verbose = 0;
struct timeval time_start, time_done;
/*
* The default exit code for lock conflict or timeout
* is specified in man flock.1
*/
int conflict_exit_code = 101;
char **cmd_argv = NULL, *sh_c_argv[4];
const char *filename = NULL;
enum {
OPT_VERBOSE = CHAR_MAX + 1
};
static const struct option long_options[] = {
{"shared", no_argument, NULL, 's'},
{"exclusive", no_argument, NULL, 'x'},
{"unlock", no_argument, NULL, 'u'},
{"nonblocking", no_argument, NULL, 'n'},
{"nb", no_argument, NULL, 'n'},
{"wait", required_argument, NULL, 'w'},
{"conflict-exit-code", required_argument, NULL, 'E'},
{"close", no_argument, NULL, 'o'},
{"no-fork", no_argument, NULL, 'F'},
{"verbose", no_argument, NULL, OPT_VERBOSE},
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'V'},
{NULL, 0, NULL, 0}
};
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
if (argc < 2)
usage(EX_USAGE);
optopt = 0;
while ((opt =
getopt_long(argc, argv, "+sexnoFuw:E:hV?", long_options,
&ix)) != EOF) {
switch (opt) {
case 's':
type = LOCK_SH;
break;
case 'e':
case 'x':
type = LOCK_EX;
break;
case 'u':
type = LOCK_UN;
break;
case 'o':
do_close = 1;
break;
case 'F':
no_fork = 1;
break;
case 'n':
block = LOCK_NB;
break;
case OPT_VERBOSE:
verbose = 1;
break;
default:
/* optopt will be set if this was an unrecognized
* option, i.e. *not* 'h' or '?
*/
usage(optopt ? EX_USAGE : 0);
break;
}
}
if (no_fork && do_close)
errx(EX_USAGE,
_("the --no-fork and --close options are incompatible"));
if (argc > optind + 1) {
/* Run command */
if (!strcmp(argv[optind + 1], "-c") ||
!strcmp(argv[optind + 1], "--command")) {
if (argc != optind + 3)
errx(EX_USAGE,
_("%s requires exactly one command argument"),
argv[optind + 1]);
cmd_argv = sh_c_argv;
cmd_argv[0] = getenv("SHELL");
if (!cmd_argv[0] || !*cmd_argv[0])
cmd_argv[0] = _PATH_BSHELL;
cmd_argv[1] = "-c";
cmd_argv[2] = argv[optind + 2];
cmd_argv[3] = 0;
} else {
cmd_argv = &argv[optind + 1];
}
filename = argv[optind];
fd = open_file(filename, &open_flags);
} else {
/* Bad options */
errx(EX_USAGE, _("requires file descriptor, file or directory"));
}
while (flock(fd, type | block)) {
switch (errno) {
case EWOULDBLOCK:
/* -n option set and failed to lock. */
if (verbose)
warnx(_("failed to get lock"));
exit(conflict_exit_code);
case EINTR:
/* Signal received */
if (timeout_expired) {
/* -w option set and failed to lock. */
if (verbose)
warnx(_("timeout while waiting to get lock"));
exit(conflict_exit_code);
}
/* otherwise try again */
continue;
case EIO:
case EBADF: /* since Linux 3.4 (commit 55725513) */
/* Probably NFSv4 where flock() is emulated by fcntl().
* Let's try to reopen in read-write mode.
*/
if (!(open_flags & O_RDWR) &&
type != LOCK_SH &&
filename &&
access(filename, R_OK | W_OK) == 0) {
close(fd);
open_flags = O_RDWR;
fd = open_file(filename, &open_flags);
if (open_flags & O_RDWR)
break;
}
/* go through */
default:
/* Other errors */
if (filename)
warn("%s", filename);
else
warn("%d", fd);
exit((errno == ENOLCK
|| errno == ENOMEM) ? EX_OSERR : EX_DATAERR);
}
}
status = EX_OK;
if (cmd_argv) {
pid_t w, f;
/* Clear any inherited settings */
signal(SIGCHLD, SIG_DFL);
if (verbose)
printf(_("%s: executing %s\n"), program_invocation_short_name, cmd_argv[0]);
if (!no_fork) {
f = fork();
if (f < 0) {
err(EX_OSERR, _("fork failed"));
if (f != 0) {
do {
w = waitpid(f, &status, 0);
if (w == -1 && errno != EINTR)
break;
} while (w != f);
if (w == -1) {
status = EXIT_FAILURE;
warn(_("waitpid failed"));
} else if (WIFEXITED(status))
status = WEXITSTATUS(status);
else if (WIFSIGNALED(status))
status = WTERMSIG(status) + 128;
else
/* WTF? */
status = EX_OSERR;
}
goto out;
}
}
if (do_close)
close(fd);
execvp(cmd_argv[0], cmd_argv);
/* execvp() failed */
warn(_("failed to execute %s"), cmd_argv[0]);
_exit((errno == ENOMEM) ? EX_OSERR : EX_UNAVAILABLE);
}
out:
return status;
}

115
myflock/nls.h Normal file
View file

@ -0,0 +1,115 @@
#ifndef UTIL_LINUX_NLS_H
#define UTIL_LINUX_NLS_H
int main(int argc, char *argv[]);
#ifndef LOCALEDIR
#define LOCALEDIR "/usr/share/locale"
#endif
#ifdef HAVE_LOCALE_H
# include <locale.h>
#else
# undef setlocale
# define setlocale(Category, Locale) /* empty */
struct lconv
{
char *decimal_point;
};
# undef localeconv
# define localeconv() NULL
#endif
#ifdef ENABLE_NLS
# include <libintl.h>
# define _(Text) gettext (Text)
# ifdef gettext_noop
# define N_(String) gettext_noop (String)
# else
# define N_(String) (String)
# endif
# define P_(Singular, Plural, n) ngettext (Singular, Plural, n)
#else
# undef bindtextdomain
# define bindtextdomain(Domain, Directory) /* empty */
# undef textdomain
# define textdomain(Domain) /* empty */
# define _(Text) (Text)
# define N_(Text) (Text)
# define P_(Singular, Plural, n) ((n) == 1 ? (Singular) : (Plural))
#endif
#ifdef HAVE_LANGINFO_H
# include <langinfo.h>
#else
typedef int nl_item;
extern char *langinfo_fallback(nl_item item);
# define nl_langinfo langinfo_fallback
enum {
CODESET = 1,
RADIXCHAR,
THOUSEP,
D_T_FMT,
D_FMT,
T_FMT,
T_FMT_AMPM,
AM_STR,
PM_STR,
DAY_1,
DAY_2,
DAY_3,
DAY_4,
DAY_5,
DAY_6,
DAY_7,
ABDAY_1,
ABDAY_2,
ABDAY_3,
ABDAY_4,
ABDAY_5,
ABDAY_6,
ABDAY_7,
MON_1,
MON_2,
MON_3,
MON_4,
MON_5,
MON_6,
MON_7,
MON_8,
MON_9,
MON_10,
MON_11,
MON_12,
ABMON_1,
ABMON_2,
ABMON_3,
ABMON_4,
ABMON_5,
ABMON_6,
ABMON_7,
ABMON_8,
ABMON_9,
ABMON_10,
ABMON_11,
ABMON_12,
ERA_D_FMT,
ERA_D_T_FMT,
ERA_T_FMT,
ALT_DIGITS,
CRNCYSTR,
YESEXPR,
NOEXPR
};
#endif /* !HAVE_LANGINFO_H */
#endif /* UTIL_LINUX_NLS_H */

11
myflock/timer.h Normal file
View file

@ -0,0 +1,11 @@
#ifndef UTIL_LINUX_TIMER_H
#define UTIL_LINUX_TIMER_H
#include <signal.h>
#include <sys/time.h>
extern int setup_timer(timer_t * t_id, struct itimerval *timeout,
void (*timeout_handler)(int, siginfo_t *, void *));
extern void cancel_timer(timer_t * t_id);
#endif /* UTIL_LINUX_TIMER_H */

41
zconvey.plugin.zsh Normal file
View file

@ -0,0 +1,41 @@
#
# No plugin manager is needed to use this file. All that is needed is adding:
# source {where-zconvey-is}/zconvey.plugin.zsh
#
# to ~/.zshrc.
#
0="${(%):-%N}" # this gives immunity to functionargzero being unset
ZCONVEY_REPO_DIR="${0%/*}"
ZCONVEY_CONFIG_DIR="$HOME/.config/zconvey"
#
# Update FPATH if:
# 1. Not loading with Zplugin
# 2. Not having fpath already updated (that would equal: using other plugin manager)
#
if [[ -z "$ZPLG_CUR_PLUGIN" && "${fpath[(r)$ZCONVEY_REPO_DIR]}" != $ZCONVEY_REPO_DIR ]]; then
fpath+=( "$ZCONVEY_REPO_DIR" )
fi
typeset -gi ZCONV_ID
typeset -hH ZCONV_FD
# Acquire ID
() {
mkdir -p "${ZCONVEY_CONFIG_DIR}/locks"
integer idx possible_id=1
local fd
# Supported are 100 shells - acquire takes ~330 ms
for (( idx=1; idx <= 100; idx ++ )); do
:
done
}
function __convey_preexec() {
}
autoload add-zsh-hook
add-zsh-hook preexec __convey_preexec