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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
2822da4f | 2 | |
11c3a366 | 3 | #include <errno.h> |
2822da4f LP |
4 | #include <string.h> |
5 | ||
dd1f5bd0 YW |
6 | #include "alloc-util.h" |
7 | #include "capability-util.h" | |
2822da4f | 8 | #include "cap-list.h" |
dd1f5bd0 | 9 | #include "extract-word.h" |
93cc7779 | 10 | #include "macro.h" |
6bedfcbb | 11 | #include "parse-util.h" |
417770f3 | 12 | #include "stdio-util.h" |
6bedfcbb | 13 | #include "util.h" |
2822da4f | 14 | |
c9f7b4d3 | 15 | static const struct capability_name* lookup_capability(register const char *str, register GPERF_LEN_TYPE len); |
2822da4f | 16 | |
2822da4f | 17 | #include "cap-from-name.h" |
cf0fbc49 | 18 | #include "cap-to-name.h" |
2822da4f LP |
19 | |
20 | const char *capability_to_name(int id) { | |
2822da4f LP |
21 | if (id < 0) |
22 | return NULL; | |
23 | ||
cedfe0b0 | 24 | if ((size_t) id >= ELEMENTSOF(capability_names)) |
2822da4f LP |
25 | return NULL; |
26 | ||
27 | return capability_names[id]; | |
28 | } | |
29 | ||
30 | int capability_from_name(const char *name) { | |
31 | const struct capability_name *sc; | |
32 | int r, i; | |
33 | ||
34 | assert(name); | |
35 | ||
36 | /* Try to parse numeric capability */ | |
37 | r = safe_atoi(name, &i); | |
db4bd5bd | 38 | if (r >= 0) { |
417770f3 | 39 | if (i >= 0 && i < 64) |
db4bd5bd YW |
40 | return i; |
41 | else | |
42 | return -EINVAL; | |
43 | } | |
2822da4f LP |
44 | |
45 | /* Try to parse string capability */ | |
46 | sc = lookup_capability(name, strlen(name)); | |
47 | if (!sc) | |
48 | return -EINVAL; | |
49 | ||
50 | return sc->id; | |
51 | } | |
097df453 FB |
52 | |
53 | int capability_list_length(void) { | |
54 | return (int) ELEMENTSOF(capability_names); | |
55 | } | |
dd1f5bd0 YW |
56 | |
57 | int capability_set_to_string_alloc(uint64_t set, char **s) { | |
58 | _cleanup_free_ char *str = NULL; | |
dd1f5bd0 YW |
59 | size_t allocated = 0, n = 0; |
60 | ||
61 | assert(s); | |
62 | ||
864a25d9 | 63 | for (unsigned i = 0; i <= cap_last_cap(); i++) |
dd1f5bd0 YW |
64 | if (set & (UINT64_C(1) << i)) { |
65 | const char *p; | |
417770f3 | 66 | char buf[2 + 16 + 1]; |
dd1f5bd0 YW |
67 | size_t add; |
68 | ||
69 | p = capability_to_name(i); | |
417770f3 | 70 | if (!p) { |
864a25d9 | 71 | xsprintf(buf, "0x%x", i); |
417770f3 ZJS |
72 | p = buf; |
73 | } | |
dd1f5bd0 YW |
74 | |
75 | add = strlen(p); | |
76 | ||
6088cefb | 77 | if (!GREEDY_REALLOC(str, allocated, n + add + 2)) |
dd1f5bd0 YW |
78 | return -ENOMEM; |
79 | ||
80 | strcpy(mempcpy(str + n, p, add), " "); | |
81 | n += add + 1; | |
82 | } | |
83 | ||
6088cefb ZJS |
84 | if (!GREEDY_REALLOC(str, allocated, n + 1)) |
85 | return -ENOMEM; | |
86 | ||
87 | str[n > 0 ? n - 1 : 0] = '\0'; /* truncate the last space, if it's there */ | |
dd1f5bd0 | 88 | |
ae2a15bc | 89 | *s = TAKE_PTR(str); |
dd1f5bd0 YW |
90 | |
91 | return 0; | |
92 | } | |
93 | ||
94 | int capability_set_from_string(const char *s, uint64_t *set) { | |
95 | uint64_t val = 0; | |
dd1f5bd0 YW |
96 | |
97 | assert(set); | |
98 | ||
57007803 | 99 | for (const char *p = s;;) { |
dd1f5bd0 YW |
100 | _cleanup_free_ char *word = NULL; |
101 | int r; | |
102 | ||
4ec85141 | 103 | r = extract_first_word(&p, &word, NULL, EXTRACT_UNQUOTE); |
dd1f5bd0 YW |
104 | if (r == -ENOMEM) |
105 | return r; | |
106 | if (r <= 0) | |
107 | break; | |
108 | ||
109 | r = capability_from_name(word); | |
110 | if (r < 0) | |
111 | continue; | |
112 | ||
113 | val |= ((uint64_t) UINT64_C(1)) << (uint64_t) r; | |
114 | } | |
115 | ||
116 | *set = val; | |
117 | ||
118 | return 0; | |
119 | } |