mirror of https://github.com/xzeldon/htop.git
99 lines
3.0 KiB
C
99 lines
3.0 KiB
C
/*
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htop - generic/uname.c
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(C) 2021 htop dev team
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Released under the GNU GPLv2+, see the COPYING file
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in the source distribution for its full text.
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*/
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#include "config.h" // IWYU pragma: keep
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#include "generic/uname.h"
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#include <stdbool.h>
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#include <stdio.h>
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#include <string.h>
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#include "Macros.h"
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#include "XUtils.h"
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#ifdef HAVE_SYS_UTSNAME_H
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#include <sys/utsname.h>
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#endif
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#ifndef OSRELEASEFILE
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#define OSRELEASEFILE "/etc/os-release"
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#endif
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static void parseOSRelease(char* buffer, size_t bufferLen) {
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FILE* stream = fopen(OSRELEASEFILE, "r");
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if (!stream) {
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xSnprintf(buffer, bufferLen, "No OS Release");
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return;
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}
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char name[64] = {'\0'};
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char version[64] = {'\0'};
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char lineBuffer[256];
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while (fgets(lineBuffer, sizeof(lineBuffer), stream)) {
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if (String_startsWith(lineBuffer, "PRETTY_NAME=\"")) {
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const char* start = lineBuffer + strlen("PRETTY_NAME=\"");
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const char* stop = strrchr(lineBuffer, '"');
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if (!stop || stop <= start)
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continue;
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String_safeStrncpy(buffer, start, MINIMUM(bufferLen, (size_t)(stop - start + 1)));
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fclose(stream);
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return;
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}
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if (String_startsWith(lineBuffer, "NAME=\"")) {
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const char* start = lineBuffer + strlen("NAME=\"");
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const char* stop = strrchr(lineBuffer, '"');
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if (!stop || stop <= start)
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continue;
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String_safeStrncpy(name, start, MINIMUM(sizeof(name), (size_t)(stop - start + 1)));
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continue;
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}
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if (String_startsWith(lineBuffer, "VERSION=\"")) {
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const char* start = lineBuffer + strlen("VERSION=\"");
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const char* stop = strrchr(lineBuffer, '"');
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if (!stop || stop <= start)
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continue;
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String_safeStrncpy(version, start, MINIMUM(sizeof(version), (size_t)(stop - start + 1)));
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continue;
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}
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}
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fclose(stream);
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snprintf(buffer, bufferLen, "%s%s%s", name[0] ? name : "", name[0] && version[0] ? " " : "", version);
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}
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char* Generic_uname(void) {
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static char savedString[
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/* uname structure fields - manpages recommend sizeof */
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sizeof(((struct utsname*)0)->sysname) +
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sizeof(((struct utsname*)0)->release) +
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sizeof(((struct utsname*)0)->machine) +
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16/*markup*/ +
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128/*distro*/] = {'\0'};
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static bool loaded_data = false;
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if (!loaded_data) {
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struct utsname uname_info;
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int uname_result = uname(&uname_info);
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char distro[128];
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parseOSRelease(distro, sizeof(distro));
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if (uname_result == 0) {
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size_t written = xSnprintf(savedString, sizeof(savedString), "%s %s [%s]", uname_info.sysname, uname_info.release, uname_info.machine);
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if (!String_contains_i(savedString, distro, false) && sizeof(savedString) > written)
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snprintf(savedString + written, sizeof(savedString) - written, " @ %s", distro);
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} else {
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snprintf(savedString, sizeof(savedString), "%s", distro);
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}
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loaded_data = true;
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}
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return savedString;
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}
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