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Comment:Work-around for segfault & data corruption when secring is not available

A couple of things here:

1) I probably use PWMan in a way that wasn't intended: I only make my
secret key available to in temporarily, once authorised I delete the
secring.gpg file entirely so it isn't hanging about on a machine. So
when it times out I need to remember to copy my key back to the machine
before I try to re-authorise. Sometimes I forget and ...

2) It seems that for reasons I don't have the inclination or ability to
figure out, PWMan segfaults on exit when the secring.gpg isn't available
or is 0 bytes (or, probably, doesn't contain the required secret key).
This on it's own isn't a bad thing, but when it does this it also seems
to have a nasty habit of corrupting the password database; not always in
an immediately obvious manner so I can end up "backing up" this
corrupted version.

So as a workaround (for my usage circumstances), this fix checks whether
the secring file is 0 bytes and if it is waits until it isn't (I.e. I've
copied it back to the machine) before asking for re-authorisation.

This isn't perfect as it only waits once. I.e. if it recognises the
secring is available it'll prompt for the password, but it is possible
that in this time I could get distracted and come back after the secring
file is removed again (since I remove it automatically) and forget and
cause a segfault, but then I've only my stupid self to blame.

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SHA3-256: 58b6e98d51f01c48a09cdc81529b01674ebb3a9232ff1e127aa96bdf9d2ef18a
User & Date: base@atomicules.co.uk 2014-01-06 11:10:08
Context
2014-05-13
20:40
Avoid getting stuck in a loop when moving items

I have a habit of hitting m instead of M and then getting stuck in a
loop of "Sublist does not exist, try again" because there is no sublist
I can move to. Although the code is meant to allow you to break out of
this by pressing return (the answer[0] bit) it doesn't work for me
(perhaps because of the changes I made on ui_statusline_ask_str that
restore values on return?).

So instead of running it in a loop, just run it once on keypress - it's
not exactly a hassle to run it again if I do actually want to move an
item and type it wrong. check-in: 84a89d1e8e user: base@atomicules.co.uk tags: origin/tweaks, trunk

2014-01-06
11:10
Work-around for segfault & data corruption when secring is not available

A couple of things here:

1) I probably use PWMan in a way that wasn't intended: I only make my
secret key available to in temporarily, once authorised I delete the
secring.gpg file entirely so it isn't hanging about on a machine. So
when it times out I need to remember to copy my key back to the machine
before I try to re-authorise. Sometimes I forget and ...

2) It seems that for reasons I don't have the inclination or ability to
figure out, PWMan segfaults on exit when the secring.gpg isn't available
or is 0 bytes (or, probably, doesn't contain the required secret key).
This on it's own isn't a bad thing, but when it does this it also seems
to have a nasty habit of corrupting the password database; not always in
an immediately obvious manner so I can end up "backing up" this
corrupted version.

So as a workaround (for my usage circumstances), this fix checks whether
the secring file is 0 bytes and if it is waits until it isn't (I.e. I've
copied it back to the machine) before asking for re-authorisation.

This isn't perfect as it only waits once. I.e. if it recognises the
secring is available it'll prompt for the password, but it is possible
that in this time I could get distracted and come back after the secring
file is removed again (since I remove it automatically) and forget and
cause a segfault, but then I've only my stupid self to blame. check-in: 58b6e98d51 user: base@atomicules.co.uk tags: origin/tweaks, trunk

2014-01-03
22:31
Merge branch 'modernise' into tweaks check-in: 229ff25e0f user: base@atomicules.co.uk tags: origin/tweaks, trunk
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to src/ui.c.

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 */

#include <pwman.h>
#include <ui.h>
#include <help.h>
#include <time.h>
#include <stdlib.h>


char * statusline_ask_str(char *, char*, int);
Pw *get_highlighted_item();

int should_resize = FALSE;
int can_resize = FALSE;









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 */

#include <pwman.h>
#include <ui.h>
#include <help.h>
#include <time.h>
#include <stdlib.h>
#include <sys/stat.h>

char * statusline_ask_str(char *, char*, int);
Pw *get_highlighted_item();

int should_resize = FALSE;
int can_resize = FALSE;
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int
ui_run()
{
	Pw *current_item;
	int ch;
	int i = 0;
	int load_worked = 0;





#ifdef DEBUG
	int debug_i = 0;
#endif
	char msg[80];

	time_base = time(NULL);









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int
ui_run()
{
	Pw *current_item;
	int ch;
	int i = 0;
	int load_worked = 0;
	int secret_key_message = 0;
	struct stat st;
	char secring[STRING_LONG];
	strcpy(secring, getenv("HOME"));
	strcat(secring, "/.gnupg/secring.gpg");
#ifdef DEBUG
	int debug_i = 0;
#endif
	char msg[80];

	time_base = time(NULL);
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		if((time_base < (time(NULL) - (options->passphrase_timeout*60)))
				&& options->passphrase_timeout != 0 && tolower(ch) != 'q'){
			pwlist_write_file();
			pwlist_free_all();

			ui_statusline_msg("Passphrase has timed out and you must enter it again.");
			getch();












			
			load_worked = pwlist_read_file();
			if(load_worked != 0) {
				ui_statusline_msg("Error - unable to re-load the password file!");
				break;

			}

			time_base = time(NULL);
		}
		
		switch(ch){
			case 'Q':








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		if((time_base < (time(NULL) - (options->passphrase_timeout*60)))
				&& options->passphrase_timeout != 0 && tolower(ch) != 'q'){
			pwlist_write_file();
			pwlist_free_all();

			ui_statusline_msg("Passphrase has timed out and you must enter it again.");
			getch();
			// Try to avoid segfault if secring isn't available
			// Need to check for 0 byte file size since something in pwlist_write_file() "touches" it
			stat(secring, &st);
			while ( st.st_size == 0 ) {
				if (secret_key_message == 0) {
					ui_statusline_msg("Secret key not available... Waiting until it is");
					secret_key_message = 1;
				}
				stat(secring, &st);
				sleep(1);
			}
			secret_key_message = 0;
			
			load_worked = pwlist_read_file();
			if(load_worked != 0) {
				ui_statusline_msg("Error - unable to re-load the password file!");
				break;
				// It segfaults here.
			}

			time_base = time(NULL);
		}
		
		switch(ch){
			case 'Q':
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