132 lines
2.0 KiB
C
132 lines
2.0 KiB
C
#include <glibtop.h>
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#include <glibtop/error.h>
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#include "glibtop_private.h"
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#include <glib.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <fcntl.h>
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unsigned long long
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get_scaled(const char *buffer, const char *key)
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{
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const char *ptr;
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char *next;
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unsigned long long value = 0;
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if ((ptr = strstr(buffer, key)))
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{
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ptr += strlen(key);
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value = strtoull(ptr, &next, 0);
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if (strchr(next, 'k'))
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value *= 1024;
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else if (strchr(next, 'M'))
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value *= 1024 * 1024;
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}
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return value;
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}
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char *
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skip_token (const char *p)
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{
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p = next_token(p);
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while (*p && !isspace(*p)) p++;
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p = next_token(p);
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return (char *)p;
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}
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/*
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* Read functions
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*/
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enum TRY_FILE_TO_BUFFER
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{
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TRY_FILE_TO_BUFFER_OK = 0,
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TRY_FILE_TO_BUFFER_OPEN = -1,
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TRY_FILE_TO_BUFFER_READ = -2
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};
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int try_file_to_buffer(char *buffer, const char *format, ...)
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{
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char path[4096];
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int fd;
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ssize_t len;
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va_list pa;
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va_start(pa, format);
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/* C99 also provides vsnprintf */
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g_vsnprintf(path, sizeof path, format, pa);
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va_end(pa);
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buffer [0] = '\0';
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if((fd = open (path, O_RDONLY)) < 0)
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return TRY_FILE_TO_BUFFER_OPEN;
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len = read (fd, buffer, BUFSIZ-1);
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close (fd);
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if (len < 0)
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return TRY_FILE_TO_BUFFER_READ;
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buffer [len] = '\0';
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return TRY_FILE_TO_BUFFER_OK;
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}
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void
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file_to_buffer(glibtop *server, char *buffer, const char *filename)
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{
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switch(try_file_to_buffer(buffer, filename))
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{
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case TRY_FILE_TO_BUFFER_OPEN:
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glibtop_error_io_r (server, "open (%s)", filename);
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case TRY_FILE_TO_BUFFER_READ:
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glibtop_error_io_r (server, "read (%s)", filename);
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}
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}
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static unsigned long
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read_boot_time(glibtop *server)
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{
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char buffer[BUFSIZ];
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char *btime;
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file_to_buffer(server, buffer, "/proc/stat");
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btime = strstr(buffer, "btime");
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g_return_val_if_fail(btime != NULL, 0UL);
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btime = skip_token(btime);
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return strtoul(btime, NULL, 10);
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}
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unsigned long
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get_boot_time(glibtop *server)
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{
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static unsigned long boot_time = 0UL;
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if(G_UNLIKELY(!boot_time))
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{
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boot_time = read_boot_time(server);
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}
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return boot_time;
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}
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