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Add getservbyname and getservbyport (#204)

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For every call of getservbyname/getservbyport the lookup of
/etc/services is done by opening the file and parsing each line
one-by-one. This is slow, but the implementation is simple.

This change also adds fixes for the gethostbyname function.
This commit is contained in:
Gautham 2021-07-05 05:01:42 +05:30 • committed by GitHub
parent cfbd2afc19
commit 0ea2907730
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8 changed files with 412 additions and 25 deletions
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17
libc/dns/servicestxt.h Normal file
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#ifndef COSMOPOLITAN_LIBC_DNS_SERVICESTXT_H_
#define COSMOPOLITAN_LIBC_DNS_SERVICESTXT_H_
#include "libc/sock/sock.h"
#include "libc/stdio/stdio.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
int LookupServicesByPort(const int, char **, char *, size_t)
paramsnonnull((2, 3));
int LookupServicesByName(const char *, char **) paramsnonnull((1, 2));
/* TODO: implement like struct HostsTxt? */
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_DNS_SERVICESTXT_H_ */