--- /dev/null
+ 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.
--- /dev/null
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <time.h>
+#include <signal.h>
+#include <errno.h>
+#include <X11/Xlib.h>
+#include <sys/signalfd.h>
+#include <poll.h>
+#define LENGTH(X) (sizeof(X) / sizeof (X[0]))
+#define CMDLENGTH 50
+
+typedef struct {
+ char* icon;
+ char* command;
+ unsigned int interval;
+ unsigned int signal;
+} Block;
+void sighandler();
+void buttonhandler(int ssi_int);
+void replace(char *str, char old, char new);
+void remove_all(char *str, char to_remove);
+void getcmds(int time);
+void getsigcmds(int signal);
+void setupsignals();
+int getstatus(char *str, char *last);
+void setroot();
+void statusloop();
+void termhandler(int signum);
+
+
+#include "config.h"
+
+static Display *dpy;
+static int screen;
+static Window root;
+static char statusbar[LENGTH(blocks)][CMDLENGTH] = {0};
+static char statusstr[2][256];
+static int statusContinue = 1;
+static int signalFD;
+static int timerInterval = -1;
+static void (*writestatus) () = setroot;
+
+void replace(char *str, char old, char new)
+{
+ for(char * c = str; *c; c++)
+ if(*c == old)
+ *c = new;
+}
+
+// the previous function looked nice but unfortunately it didnt work if to_remove was in any position other than the last character
+// theres probably still a better way of doing this
+void remove_all(char *str, char to_remove) {
+ char *read = str;
+ char *write = str;
+ while (*read) {
+ if (*read != to_remove) {
+ *write++ = *read;
+ }
+ ++read;
+ }
+ *write = '\0';
+}
+
+int gcd(int a, int b)
+{
+ int temp;
+ while (b > 0){
+ temp = a % b;
+
+ a = b;
+ b = temp;
+ }
+ return a;
+}
+
+
+//opens process *cmd and stores output in *output
+void getcmd(const Block *block, char *output)
+{
+ if (block->signal)
+ {
+ output[0] = block->signal;
+ output++;
+ }
+ char *cmd = block->command;
+ FILE *cmdf = popen(cmd,"r");
+ if (!cmdf){
+ //printf("failed to run: %s, %d\n", block->command, errno);
+ return;
+ }
+ char tmpstr[CMDLENGTH] = "";
+ // TODO decide whether its better to use the last value till next time or just keep trying while the error was the interrupt
+ // this keeps trying to read if it got nothing and the error was an interrupt
+ // could also just read to a separate buffer and not move the data over if interrupted
+ // this way will take longer trying to complete 1 thing but will get it done
+ // the other way will move on to keep going with everything and the part that failed to read will be wrong till its updated again
+ // either way you have to save the data to a temp buffer because when it fails it writes nothing and then then it gets displayed before this finishes
+ char * s;
+ int e;
+ do {
+ errno = 0;
+ s = fgets(tmpstr, CMDLENGTH-(strlen(delim)+1), cmdf);
+ e = errno;
+ } while (!s && e == EINTR);
+ pclose(cmdf);
+ int i = strlen(block->icon);
+ strcpy(output, block->icon);
+ strcpy(output+i, tmpstr);
+ remove_all(output, '\n');
+ i = strlen(output);
+ if ((i > 0 && block != &blocks[LENGTH(blocks) - 1])){
+ strcat(output, delim);
+ }
+ i+=strlen(delim);
+ output[i++] = '\0';
+}
+
+void getcmds(int time)
+{
+ const Block* current;
+ for(int i = 0; i < LENGTH(blocks); i++)
+ {
+ current = blocks + i;
+ if ((current->interval != 0 && time % current->interval == 0) || time == -1){
+ getcmd(current,statusbar[i]);
+ }
+ }
+}
+
+void getsigcmds(int signal)
+{
+ const Block *current;
+ for (int i = 0; i < LENGTH(blocks); i++)
+ {
+ current = blocks + i;
+ if (current->signal == signal){
+ getcmd(current,statusbar[i]);
+ }
+ }
+}
+
+void setupsignals()
+{
+ sigset_t signals;
+ sigemptyset(&signals);
+ sigaddset(&signals, SIGALRM); // Timer events
+ sigaddset(&signals, SIGUSR1); // Button events
+ // All signals assigned to blocks
+ for (size_t i = 0; i < LENGTH(blocks); i++)
+ if (blocks[i].signal > 0)
+ sigaddset(&signals, SIGRTMIN + blocks[i].signal);
+ // Create signal file descriptor for pooling
+ signalFD = signalfd(-1, &signals, 0);
+ // Block all real-time signals
+ for (int i = SIGRTMIN; i <= SIGRTMAX; i++) sigaddset(&signals, i);
+ sigprocmask(SIG_BLOCK, &signals, NULL);
+ // Do not transform children into zombies
+ struct sigaction sigchld_action = {
+ .sa_handler = SIG_DFL,
+ .sa_flags = SA_NOCLDWAIT
+ };
+ sigaction(SIGCHLD, &sigchld_action, NULL);
+
+}
+
+int getstatus(char *str, char *last)
+{
+ strcpy(last, str);
+ str[0] = '\0';
+ for(int i = 0; i < LENGTH(blocks); i++) {
+ strcat(str, statusbar[i]);
+ if (i == LENGTH(blocks) - 1)
+ strcat(str, " ");
+ }
+ str[strlen(str)-1] = '\0';
+ return strcmp(str, last);//0 if they are the same
+}
+
+void setroot()
+{
+ if (!getstatus(statusstr[0], statusstr[1]))//Only set root if text has changed.
+ return;
+ Display *d = XOpenDisplay(NULL);
+ if (d) {
+ dpy = d;
+ }
+ screen = DefaultScreen(dpy);
+ root = RootWindow(dpy, screen);
+ XStoreName(dpy, root, statusstr[0]);
+ XCloseDisplay(dpy);
+}
+
+void pstdout()
+{
+ if (!getstatus(statusstr[0], statusstr[1]))//Only write out if text has changed.
+ return;
+ printf("%s\n",statusstr[0]);
+ fflush(stdout);
+}
+
+
+void statusloop()
+{
+ setupsignals();
+ // first figure out the default wait interval by finding the
+ // greatest common denominator of the intervals
+ for(int i = 0; i < LENGTH(blocks); i++){
+ if(blocks[i].interval){
+ timerInterval = gcd(blocks[i].interval, timerInterval);
+ }
+ }
+ getcmds(-1); // Fist time run all commands
+ raise(SIGALRM); // Schedule first timer event
+ int ret;
+ struct pollfd pfd[] = {{.fd = signalFD, .events = POLLIN}};
+ while (statusContinue) {
+ // Wait for new signal
+ ret = poll(pfd, sizeof(pfd) / sizeof(pfd[0]), -1);
+ if (ret < 0 || !(pfd[0].revents & POLLIN)) break;
+ sighandler(); // Handle signal
+ }
+}
+
+void sighandler()
+{
+ static int time = 0;
+ struct signalfd_siginfo si;
+ int ret = read(signalFD, &si, sizeof(si));
+ if (ret < 0) return;
+ int signal = si.ssi_signo;
+ switch (signal) {
+ case SIGALRM:
+ // Execute blocks and schedule the next timer event
+ getcmds(time);
+ alarm(timerInterval);
+ time += timerInterval;
+ break;
+ case SIGUSR1:
+ // Handle buttons
+ buttonhandler(si.ssi_int);
+ return;
+ default:
+ // Execute the block that has the given signal
+ getsigcmds(signal - SIGRTMIN);
+ break;
+ }
+ writestatus();
+}
+
+void buttonhandler(int ssi_int)
+{
+ char button[2] = {'0' + ssi_int & 0xff, '\0'};
+ pid_t process_id = getpid();
+ int sig = ssi_int >> 8;
+ if (fork() == 0)
+ {
+ const Block *current;
+ for (int i = 0; i < LENGTH(blocks); i++)
+ {
+ current = blocks + i;
+ if (current->signal == sig)
+ break;
+ }
+ char shcmd[1024];
+ sprintf(shcmd,"%s && kill -%d %d",current->command, current->signal+34,process_id);
+ char *command[] = { "/bin/sh", "-c", shcmd, NULL };
+ setenv("BLOCK_BUTTON", button, 1);
+ setsid();
+ execvp(command[0], command);
+ exit(EXIT_SUCCESS);
+ }
+}
+
+
+void termhandler(int signum)
+{
+ statusContinue = 0;
+}
+
+int main(int argc, char** argv)
+{
+ for(int i = 0; i < argc; i++)
+ {
+ if (!strcmp("-d",argv[i]))
+ delim = argv[++i];
+ else if(!strcmp("-p",argv[i]))
+ writestatus = pstdout;
+ }
+ signal(SIGTERM, termhandler);
+ signal(SIGINT, termhandler);
+ statusloop();
+ close(signalFD);
+}