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chore(lint): lint injector source with clang-format
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@mmanciop
mmanciop committed Dec 3, 2024
1 parent 10ddb6a commit 52a3bdf
Showing 1 changed file with 113 additions and 117 deletions.
230 changes: 113 additions & 117 deletions images/instrumentation/injector/src/dash0_injector.c
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Original file line number Diff line number Diff line change
@@ -1,81 +1,88 @@
#include <unistd.h>
#include <stdint.h>
#include <unistd.h>

#define ALIGN (sizeof(size_t))
#define UCHAR_MAX 255
#define ONES ((size_t)-1/UCHAR_MAX)
#define HIGHS (ONES * (UCHAR_MAX/2+1))
#define HASZERO(x) ((x)-ONES & ~(x) & HIGHS)
#define ONES ((size_t)-1 / UCHAR_MAX)
#define HIGHS (ONES * (UCHAR_MAX / 2 + 1))
#define HASZERO(x) ((x) - ONES & ~(x) & HIGHS)

#define NODE_OPTIONS_ENV_VAR_NAME "NODE_OPTIONS"
#define NODE_OPTIONS_DASH0_REQUIRE "--require /__dash0__/instrumentation/node.js/node_modules/@dash0hq/opentelemetry"
#define NODE_OPTIONS_DASH0_REQUIRE \
"--require " \
"/__dash0__/instrumentation/node.js/node_modules/@dash0hq/opentelemetry"
#define OTEL_RESOURCE_ATTRIBUTES_ENV_VAR_NAME "OTEL_RESOURCE_ATTRIBUTES"
#define DASH0_POD_UID_ENV_VAR_NAME "DASH0_POD_UID"
#define DASH0_POD_CONTAINER_NAME_VAR_NAME "DASH0_CONTAINER_NAME"

extern char **__environ;

size_t __strlen(const char *s)
{
const char *a = s;
const size_t *w;
for (; (uintptr_t)s % ALIGN; s++) if (!*s) return s-a;
for (w = (const void *)s; !HASZERO(*w); w++);
for (s = (const void *)w; *s; s++);
return s-a;
size_t __strlen(const char *s) {
const char *a = s;
const size_t *w;
for (; (uintptr_t)s % ALIGN; s++)
if (!*s)
return s - a;
for (w = (const void *)s; !HASZERO(*w); w++)
;
for (s = (const void *)w; *s; s++)
;
return s - a;
}

char *__strchrnul(const char *s, int c)
{
size_t *w, k;

c = (unsigned char)c;
if (!c) return (char *)s + __strlen(s);

for (; (uintptr_t)s % ALIGN; s++)
if (!*s || *(unsigned char *)s == c) return (char *)s;
k = ONES * c;
for (w = (void *)s; !HASZERO(*w) && !HASZERO(*w^k); w++);
for (s = (void *)w; *s && *(unsigned char *)s != c; s++);
return (char *)s;
char *__strchrnul(const char *s, int c) {
size_t *w, k;

c = (unsigned char)c;
if (!c)
return (char *)s + __strlen(s);

for (; (uintptr_t)s % ALIGN; s++)
if (!*s || *(unsigned char *)s == c)
return (char *)s;
k = ONES * c;
for (w = (void *)s; !HASZERO(*w) && !HASZERO(*w ^ k); w++)
;
for (s = (void *)w; *s && *(unsigned char *)s != c; s++)
;
return (char *)s;
}

char *__strcpy(char *restrict dest, const char *restrict src)
{
const unsigned char *s = src;
unsigned char *d = dest;
while ((*d++ = *s++));
return dest;
char *__strcpy(char *restrict dest, const char *restrict src) {
const unsigned char *s = src;
unsigned char *d = dest;
while ((*d++ = *s++))
;
return dest;
}

char *__strcat(char *restrict dest, const char *restrict src)
{
__strcpy(dest + __strlen(dest), src);
return dest;
char *__strcat(char *restrict dest, const char *restrict src) {
__strcpy(dest + __strlen(dest), src);
return dest;
}

int __strcmp(const char *l, const char *r)
{
for (; *l==*r && *l; l++, r++);
return *(unsigned char *)l - *(unsigned char *)r;
int __strcmp(const char *l, const char *r) {
for (; *l == *r && *l; l++, r++)
;
return *(unsigned char *)l - *(unsigned char *)r;
}

int __strncmp(const char *_l, const char *_r, size_t n)
{
const unsigned char *l=(void *)_l, *r=(void *)_r;
if (!n--) return 0;
for (; *l && *r && n && *l == *r ; l++, r++, n--);
return *l - *r;
int __strncmp(const char *_l, const char *_r, size_t n) {
const unsigned char *l = (void *)_l, *r = (void *)_r;
if (!n--)
return 0;
for (; *l && *r && n && *l == *r; l++, r++, n--)
;
return *l - *r;
}

char *__getenv(const char *name)
{
size_t l = __strchrnul(name, '=') - name;
if (l && !name[l] && __environ)
for (char **e = __environ; *e; e++)
if (!__strncmp(name, *e, l) && l[*e] == '=')
return *e + l+1;
return 0;
char *__getenv(const char *name) {
size_t l = __strchrnul(name, '=') - name;
if (l && !name[l] && __environ)
for (char **e = __environ; *e; e++)
if (!__strncmp(name, *e, l) && l[*e] == '=')
return *e + l + 1;
return 0;
}

/*
Expand All @@ -85,73 +92,62 @@ char *__getenv(const char *name)
char val1[1012];
char val2[1012];

char *getenv(const char *name)
{
char *origValue = __getenv(name);
char *podUid = __getenv(DASH0_POD_UID_ENV_VAR_NAME);
char *containerName = __getenv(DASH0_POD_CONTAINER_NAME_VAR_NAME);
int l = __strlen(name);

char *otelResourceAttributesVarName = OTEL_RESOURCE_ATTRIBUTES_ENV_VAR_NAME;
char *nodeOptionsVarName = NODE_OPTIONS_ENV_VAR_NAME;
if (__strcmp(name, otelResourceAttributesVarName) == 0)
{
// If we have not calculated this env var yet
if (__strlen(val1) == 0)
{
int catCount = 0;

if (podUid != NULL && __strlen(podUid) > 0)
{
__strcat(val1, "k8s.pod.uid=");
__strcat(val1, podUid);
catCount += 1;
}

if (containerName != NULL && __strlen(containerName) > 0)
{
if (catCount > 0)
{
__strcat(val1, ",");
}

__strcat(val1, "k8s.container.name=");
__strcat(val1, containerName);
catCount += 1;
}

if (origValue != NULL && __strlen(origValue) > 0)
{
if (catCount > 0)
{
__strcat(val1, ",");
}

__strcat(val1, origValue);
}
char *getenv(const char *name) {
char *origValue = __getenv(name);
char *podUid = __getenv(DASH0_POD_UID_ENV_VAR_NAME);
char *containerName = __getenv(DASH0_POD_CONTAINER_NAME_VAR_NAME);
int l = __strlen(name);

char *otelResourceAttributesVarName = OTEL_RESOURCE_ATTRIBUTES_ENV_VAR_NAME;
char *nodeOptionsVarName = NODE_OPTIONS_ENV_VAR_NAME;
if (__strcmp(name, otelResourceAttributesVarName) == 0) {
// If we have not calculated this env var yet
if (__strlen(val1) == 0) {
int catCount = 0;

if (podUid != NULL && __strlen(podUid) > 0) {
__strcat(val1, "k8s.pod.uid=");
__strcat(val1, podUid);
catCount += 1;
}

if (containerName != NULL && __strlen(containerName) > 0) {
if (catCount > 0) {
__strcat(val1, ",");
}

return val1;
}
else if (__strcmp(name, nodeOptionsVarName) == 0)
{
// If we have not calculated this env var yet
if (__strlen(val2) == 0)
{
// Prepend our --require as the first item to the NODE_OPTIONS string.
char *nodeOptionsDash0Require = NODE_OPTIONS_DASH0_REQUIRE;
__strcat(val2, nodeOptionsDash0Require);

if (origValue != NULL && __strlen(origValue) > 0)
{
// If NODE_OPTIONS were present, append the existing NODE_OPTIONS after our --require.
__strcat(val2, " ");
__strcat(val2, origValue);
}
__strcat(val1, "k8s.container.name=");
__strcat(val1, containerName);
catCount += 1;
}

if (origValue != NULL && __strlen(origValue) > 0) {
if (catCount > 0) {
__strcat(val1, ",");
}

return val2;
__strcat(val1, origValue);
}
}

return val1;
} else if (__strcmp(name, nodeOptionsVarName) == 0) {
// If we have not calculated this env var yet
if (__strlen(val2) == 0) {
// Prepend our --require as the first item to the NODE_OPTIONS string.
char *nodeOptionsDash0Require = NODE_OPTIONS_DASH0_REQUIRE;
__strcat(val2, nodeOptionsDash0Require);

if (origValue != NULL && __strlen(origValue) > 0) {
// If NODE_OPTIONS were present, append the existing NODE_OPTIONS after
// our --require.
__strcat(val2, " ");
__strcat(val2, origValue);
}
}

return origValue;
return val2;
}

return origValue;
}

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