components/swap.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
/* See LICENSE file for copyright and license details. */ #if defined(__linux__) #include <err.h> #include <stdio.h> #include <string.h> #include "../util.h" const char * swap_free(void) { long total, free; FILE *fp; size_t bytes_read; char *match; fp = fopen("/proc/meminfo", "r"); if (fp == NULL) { warn("Failed to open file /proc/meminfo"); return NULL; } if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) { warn("swap_free: read error"); fclose(fp); return NULL; } fclose(fp); if ((match = strstr(buf, "SwapTotal")) == NULL) return NULL; sscanf(match, "SwapTotal: %ld kB\n", &total); if ((match = strstr(buf, "SwapFree")) == NULL) return NULL; sscanf(match, "SwapFree: %ld kB\n", &free); return bprintf("%f", (float)free / 1024 / 1024); } const char * swap_perc(void) { long total, free, cached; FILE *fp; size_t bytes_read; char *match; fp = fopen("/proc/meminfo", "r"); if (fp == NULL) { warn("Failed to open file /proc/meminfo"); return NULL; } if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) { warn("swap_perc: read error"); fclose(fp); return NULL; } fclose(fp); if ((match = strstr(buf, "SwapTotal")) == NULL) return NULL; sscanf(match, "SwapTotal: %ld kB\n", &total); if ((match = strstr(buf, "SwapCached")) == NULL) return NULL; sscanf(match, "SwapCached: %ld kB\n", &cached); if ((match = strstr(buf, "SwapFree")) == NULL) return NULL; sscanf(match, "SwapFree: %ld kB\n", &free); return bprintf("%d", 100 * (total - free - cached) / total); } const char * swap_total(void) { long total; FILE *fp; size_t bytes_read; char *match; fp = fopen("/proc/meminfo", "r"); if (fp == NULL) { warn("Failed to open file /proc/meminfo"); return NULL; } if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) { warn("swap_total: read error"); fclose(fp); return NULL; } fclose(fp); if ((match = strstr(buf, "SwapTotal")) == NULL) return NULL; sscanf(match, "SwapTotal: %ld kB\n", &total); return bprintf("%f", (float)total / 1024 / 1024); } const char * swap_used(void) { long total, free, cached; FILE *fp; size_t bytes_read; char *match; fp = fopen("/proc/meminfo", "r"); if (fp == NULL) { warn("Failed to open file /proc/meminfo"); return NULL; } if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) { warn("swap_used: read error"); fclose(fp); return NULL; } fclose(fp); if ((match = strstr(buf, "SwapTotal")) == NULL) return NULL; sscanf(match, "SwapTotal: %ld kB\n", &total); if ((match = strstr(buf, "SwapCached")) == NULL) return NULL; sscanf(match, "SwapCached: %ld kB\n", &cached); if ((match = strstr(buf, "SwapFree")) == NULL) return NULL; sscanf(match, "SwapFree: %ld kB\n", &free); return bprintf("%f", (float)(total - free - cached) / 1024 / 1024); } #endif