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MINOR: tools: add errname to print errno macro name

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Add helper to print the name of errno's corresponding macro, for example
"EINVAL" for errno=22. This may be helpful for debugging and for using in
some CLI commands output. The switch-case in errname() contains only the
errnos currently used in the code. So, it needs to be extended, if one starts
to use new syscalls.
This commit is contained in:
Valentine Krasnobaeva 2024-09-20 23:14:41 +02:00 committed by Willy Tarreau
parent 42bac9339c
commit 44537379fc
1 changed files with 56 additions and 0 deletions
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56
include/haproxy/tools.h
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@ -27,6 +27,7 @@
#define _GNU_SOURCE
#endif
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <time.h>
@ -1332,4 +1333,59 @@ int backup_env(void);
int clean_env(void);
int restore_env(void);
/* helper to print the name of errno's corresponding macro (for example "EINVAL"
* for errno=22) instead of calling strerror(errno).
*/
#define CASE_ERR(err) \
case err: return #err
static inline const char *errname(int err_num, char **out)
{
/* only currently used errno values, please, add a new one, if you
* start using it in the code.
*/
switch (err_num) {
case 0: return "SUCCESS";
CASE_ERR(EPERM);
CASE_ERR(ENOENT);
CASE_ERR(EINTR);
CASE_ERR(EIO);
CASE_ERR(E2BIG);
CASE_ERR(EBADF);
CASE_ERR(ECHILD);
CASE_ERR(EAGAIN);
CASE_ERR(ENOMEM);
CASE_ERR(EACCES);
CASE_ERR(EFAULT);
CASE_ERR(EINVAL);
CASE_ERR(ENFILE);
CASE_ERR(EMFILE);
CASE_ERR(ENOSPC);
CASE_ERR(ERANGE);
CASE_ERR(ENOSYS);
CASE_ERR(EADDRINUSE);
CASE_ERR(ECONNABORTED);
CASE_ERR(ECONNRESET);
CASE_ERR(EINPROGRESS);
CASE_ERR(ENOTCONN);
CASE_ERR(EADDRNOTAVAIL);
CASE_ERR(ECONNREFUSED);
CASE_ERR(ENETUNREACH);
CASE_ERR(ETIME);
CASE_ERR(EPROTO);
CASE_ERR(ENOTSOCK);
CASE_ERR(EMSGSIZE);
CASE_ERR(EPROTONOSUPPORT);
CASE_ERR(EAFNOSUPPORT);
CASE_ERR(ENOBUFS);
CASE_ERR(EISCONN);
CASE_ERR(ETIMEDOUT);
CASE_ERR(EALREADY);
default:
memprintf(out, "%d", err_num);
return *out;
}
}
#endif /* _HAPROXY_TOOLS_H */