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Make wmiistatus run all the time and wait for wmii_path to exist

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Instead of exiting as a file inside wmii_path cannot be opened, we wait
until wmii_path is found again (particularly the /rbar part, that is),
re-setup our files and continue as if nothing happened.

This will make wmiistatus survive restarts of wmii and make it wait for
/mnt/wmii to appear when booting up (and wmiistatus gets started before
wmii itself)
This commit is contained in:
Michael Stapelberg 2008-10-29 23:26:26 +01:00
parent 554a984fe6
commit 7d0f324b7a
2 changed files with 43 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
config.c
View File

@ -109,8 +109,12 @@ int load_configuration(const char *configfile) {
OPT("wmii_path")
{
char *globbed = glob_path(dest_value);
if ((stat(globbed, &stbuf)) == -1)
die("wmii_path contains an invalid path");
if ((stat(globbed, &stbuf)) == -1) {
fprintf(stderr, "Warning: wmii_path contains an invalid path\n");
free(globbed);
globbed = strdup(dest_value);
}
fprintf(stderr, "gots path: %s\n", globbed);
if (globbed[strlen(globbed)-1] != '/')
die("wmii_path is not terminated by /");
wmii_path = globbed;
@ -184,7 +188,7 @@ int load_configuration(const char *configfile) {
fclose(handle);
if (wmii_path == NULL)
exit(-4);
exit(EXIT_FAILURE);
return result;
}

52
wmiistatus.c
View File

@ -114,6 +114,31 @@ static void create_file(const char *name) {
(void)close(fd);
}
static void setup(void) {
unsigned int i;
struct stat statbuf;
char pathbuf[512];
/* Wait until wmii_path/rbar exists */
for (; stat(wmii_path, &statbuf) < 0; sleep(interval));
cleanup_rbar_dir();
if (wlan_interface)
create_file(concat(order[ORDER_WLAN],"wlan"));
if (eth_interface)
create_file(concat(order[ORDER_ETH],"eth"));
if (battery_path)
create_file(concat(order[ORDER_BATTERY],"battery"));
create_file(concat(order[ORDER_LOAD],"load"));
if (time_format)
create_file(concat(order[ORDER_TIME],"time"));
for (i = 0; i < num_run_watches; i += 2) {
snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
create_file(pathbuf);
}
}
/*
* Writes the given message in the corresponding file in wmii's /rbar directory
*
@ -123,8 +148,11 @@ static void write_to_statusbar(const char *name, const char *message) {
int fd;
(void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
if ((fd = open(pathbuf, O_RDWR)) == -1)
exit(EXIT_FAILURE);
if ((fd = open(pathbuf, O_RDWR)) == -1) {
/* Try to re-setup stuff and just continue */
setup();
return;
}
if (write(fd, message, strlen(message)) != (ssize_t)strlen(message))
exit(EXIT_FAILURE);
(void)close(fd);
@ -151,6 +179,7 @@ void die(const char *fmt, ...) {
(void)vsnprintf(buffer, sizeof(buffer), fmt, ap);
va_end(ap);
if (wmii_path != NULL)
write_error_to_statusbar(buffer);
exit(EXIT_FAILURE);
}
@ -399,21 +428,10 @@ int main(int argc, char *argv[]) {
if ((char)o == 'c')
configfile = optarg;
load_configuration(configfile);
cleanup_rbar_dir();
if (wlan_interface)
create_file(concat(order[ORDER_WLAN],"wlan"));
if (eth_interface)
create_file(concat(order[ORDER_ETH],"eth"));
if (battery_path)
create_file(concat(order[ORDER_BATTERY],"battery"));
create_file(concat(order[ORDER_LOAD],"load"));
if (time_format)
create_file(concat(order[ORDER_TIME],"time"));
for (i = 0; i < num_run_watches; i += 2) {
snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
create_file(pathbuf);
}
if (load_configuration(configfile) < 0)
return EXIT_FAILURE;
setup();
while (1) {
for (i = 0; i < num_run_watches; i += 2) {