zeldon/htop
1
0
Fork 0
mirror of https://github.com/xzeldon/htop.git synced 2025-07-13 04:34:35 +03:00
Code Issues Packages Projects Releases Wiki Activity

Separate display from sampling in SysArch and Hostname Meters

Browse Source 
Several of our newer meters have merged coding concerns in terms
of extracting values and displaying those values.  This commit
rectifies that for the SysArch and Hostname meters, allowing use
of this code with alternative front/back ends.  The SysArch code
is also refined to detect whether the platform has an os-release
file at all and/or the sys/utsname.h header via configure.ac.
This commit is contained in:
Nathan Scott
2021-03-02 15:58:11 +11:00
parent 2328e52403
commit 5b50ae3aa3
14 changed files with 210 additions and 77 deletions
Download Patch File Download Diff File Expand all files Collapse all files

79
SysArchMeter.c
View File

@ -6,90 +6,21 @@ in the source distribution for its full text.
*/
#include "config.h" // IWYU pragma: keep
#include "Platform.h"
#include "SysArchMeter.h"
#include <stdio.h>
#include <sys/utsname.h>
#include "XUtils.h"
static const int SysArchMeter_attributes[] = {HOSTNAME};
static void parseOSRelease(char* buffer, size_t bufferLen) {
FILE* stream = fopen("/etc/os-release", "r");
if (!stream) {
stream = fopen("/usr/lib/os-release", "r");
if (!stream) {
xSnprintf(buffer, bufferLen, "Unknown Distro");
return;
}
}
char name[64] = {'\0'};
char version[64] = {'\0'};
char lineBuffer[256];
while (fgets(lineBuffer, sizeof(lineBuffer), stream)) {
if (String_startsWith(lineBuffer, "PRETTY_NAME=\"")) {
const char* start = lineBuffer + strlen("PRETTY_NAME=\"");
const char* stop = strrchr(lineBuffer, '"');
if (!stop || stop <= start)
continue;
String_safeStrncpy(buffer, start, MINIMUM(bufferLen, (size_t)(stop - start + 1)));
fclose(stream);
return;
}
if (String_startsWith(lineBuffer, "NAME=\"")) {
const char* start = lineBuffer + strlen("NAME=\"");
const char* stop = strrchr(lineBuffer, '"');
if (!stop || stop <= start)
continue;
String_safeStrncpy(name, start, MINIMUM(sizeof(name), (size_t)(stop - start + 1)));
continue;
}
if (String_startsWith(lineBuffer, "VERSION=\"")) {
const char* start = lineBuffer + strlen("VERSION=\"");
const char* stop = strrchr(lineBuffer, '"');
if (!stop || stop <= start)
continue;
String_safeStrncpy(version, start, MINIMUM(sizeof(version), (size_t)(stop - start + 1)));
continue;
}
}
fclose(stream);
snprintf(buffer, bufferLen, "%s%s%s", name[0] ? name : "", name[0] && version[0] ? " " : "", version);
}
static void SysArchMeter_updateValues(ATTR_UNUSED Meter* this, char* buffer, size_t size) {
static char savedString[
/* uname structure fields - manpages recommend sizeof */
sizeof(((struct utsname*)0)->sysname) +
sizeof(((struct utsname*)0)->release) +
sizeof(((struct utsname*)0)->machine) +
16/*markup*/ +
128/*distro*/] = {'\0'};
static bool loaded_data = false;
static char* string;
if (!loaded_data) {
struct utsname uname_info;
int uname_result = uname(&uname_info);
if (string == NULL)
Platform_getRelease(&string);
char distro[128];
parseOSRelease(distro, sizeof(distro));
if (uname_result == 0) {
size_t written = xSnprintf(savedString, sizeof(savedString), "%s %s [%s]", uname_info.sysname, uname_info.release, uname_info.machine);
if (!String_contains_i(savedString, distro) && sizeof(savedString) > written)
snprintf(savedString + written, sizeof(savedString) - written, " @ %s", distro);
} else {
snprintf(savedString, sizeof(savedString), "%s", distro);
}
loaded_data = true;
}
String_safeStrncpy(buffer, savedString, size);
String_safeStrncpy(buffer, string, size);
}
const MeterClass SysArchMeter_class = {