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/* $Id$
 * $URL$
 *
 * generic driver helper for text-based displays
 *
 * Copyright (C) 1999, 2000 Michael Reinelt <michael@reinelt.co.at>
 * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
 *
 * This file is part of LCD4Linux.
 *
 * LCD4Linux is free software; you can redistribute it and/or modify
 
/* $Id$
 * $URL$
 *
 * plugin for uptime
 *
 * Copyright (C) 2003 Michael Reinelt <michael@reinelt.co.at>
 * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
 *
 * This file is part of LCD4Linux.
 *
 * LCD4Linux is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License a
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-02 03:10:16 +0000
* 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., 675 Mass Ave, Cambridge, MA 02139, USA. * */ /* * exported functions: * * int plugin_init_uptime (void) * adds functions for uptime * */ #include "config.h" #include <stdlib.h> #include <stdio.h> #include <string.h> #include <errno.h> #include <unistd.h> #include <sys/types.h> #include <sys/stat.h> #include <sys/time.h> #include <fcntl.h> #include "debug.h" #include "plugin.h" static int fd = -2; static char *itoa(char *buffer, const size_t size, unsigned int value) { char *p; /* sanity checks */ if (buffer == NULL || size < 2) return (NULL); /* p points to last char */ p = buffer + size - 1; /* set terminating zero */ *p = '\0'; do { *--p = value % 10 + '0'; value = value / 10; } while (value != 0 && p > buffer); return p; } char *struptime(const unsigned int uptime, const char *format) { static char string[256]; const char *src; char *dst; int len, size; src = format; dst = string; len = 0; /* leave room for terminating zero */ size = sizeof(string) - 1; while (len < size) { if (*src == '%') { src++; if (strchr("sSmMhHd", *src) != NULL) { char buffer[12], *s; unsigned int value = 0; int leading_zero = 0; switch (*src++) { case 's': value = uptime; break; case 'S': value = uptime % 60; leading_zero = 1; break; case 'm': value = uptime / 60; break; case 'M': value = (uptime / 60) % 60; leading_zero = 1; break; case 'h': value = uptime / 60 / 60; break; case 'H': value = (uptime / 60 / 60) % 24; leading_zero = 1; break; case 'd': value = uptime / 60 / 60 / 24; break; } if (leading_zero && value < 10) { len++; *dst++ = '0'; } s = itoa(buffer, sizeof(buffer), value); while (len < size && *s != '\0') { len++; *dst++ = *s++; } } else if (*src == '%') { len++; *dst++ = '%'; } else { len += 2; *dst++ = '%'; *dst++ = *src++; } } else { len++; *dst++ = *src; if (*src++ == '\0') break; } } /* enforce terminating zero */ if (len >= size && *(dst - 1) != '\0') { len++; *dst = '\0'; } return string; } double getuptime(void) { char buffer[36]; int i; if (fd == -2) fd = open("/proc/uptime", O_RDONLY); if (fd < 0) return -1; lseek(fd, 0, SEEK_SET); i = read(fd, buffer, sizeof(buffer) - 1); if (i < 0) return -1; buffer[i - 1] = '\0'; /* ignore the 2nd value from /proc/uptime */ return strtod(buffer, NULL); } static void my_uptime(RESULT * result, const int argc, RESULT * argv[]) { int age; static double uptime = 0.0; static struct timeval last_value; struct timeval now; if (argc > 1) { error("uptime(): wrong number of parameters"); SetResult(&result, R_STRING, ""); return; } gettimeofday(&now, NULL); age = (now.tv_sec - last_value.tv_sec) * 1000 + (now.tv_usec - last_value.tv_usec) / 1000; /* reread every 100 msec only */ if (fd == -2 || age == 0 || age > 100) { uptime = getuptime(); if (uptime < 0.0) { error("parse(/proc/uptime) failed!"); SetResult(&result, R_STRING, ""); return; } last_value = now; } if (argc == 0) { SetResult(&result, R_NUMBER, &uptime); } else { SetResult(&result, R_STRING, struptime(uptime, R2S(argv[0]))); } return; } int plugin_init_uptime(void) { AddFunction("uptime", -1, my_uptime); return 0; } void plugin_exit_uptime(void) { if (fd > 0) close(fd); fd = -2; }
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-02 03:10:16 +0000