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OS400 build break in tftp.c, 5th argument of Curl_os400_sendto() should be const #10539

jonrumsey opened this issue Feb 16, 2023 · 0 comments


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I did this

Build 7.88, failed in TFTP module with following const mismatch error at line 531;

CZM0280(30) Function argument assignment between types "struct sockaddr*" and "const struct sockaddr*" is not allowed.

    senddata = sendto(state->sockfd, (void *)state->,
                      (SEND_TYPE_ARG3)sbytes, 0,

This appears to have been uncovered by #10213.

The root cause is OS400 where in setup-os400.h, sendto() is hash defined to use Curl_os400_sendto(), however the prototype for the OS400 wrapper to deal with EBCDIC/ASCII conversions doesn't match the usual POSIX prototype of;

ssize_t sendto(int sockfd, const void *buf, size_t len, int flags,
               const struct sockaddr *dest_addr, socklen_t addrlen);

I expected the following

Clean build

curl/libcurl version


[curl -V output]

operating system

OS400 V7R5M0

@vszakats vszakats added the build label Feb 16, 2023
@bagder bagder closed this as completed in 8572157 Feb 17, 2023
bch pushed a commit to bch/curl that referenced this issue Jul 19, 2023
Add const qualifier to 5th argument of Curl_os400_sendto()

Make OS400 wrapper for sendto match the normal prototype of sendto()
with a const qualifier.

Fixes curl#10539
Closes curl#10548
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