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wolfssl-examples
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Check return of write 

gcc on Linux warns when the return value of write is not checked.
pull/225/head
Sean Parkinson 2020-08-10 11:08:33 +10:00
parent 5a0c1bdc26
commit 36f9a46318
1 changed files with 12 additions and 2 deletions
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14
ecc/ecc-export-Qx-Qy.c
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@ -46,6 +46,8 @@ int main(int argc, char *argv[])
uint32_t qxlen = POINT_SIZE, qylen = POINT_SIZE; uint32_t qxlen = POINT_SIZE, qylen = POINT_SIZE;
word32 idx = 0; word32 idx = 0;
ecc_key ec; ecc_key ec;
uint32_t len;
if (argc != 3) { if (argc != 3) {
fprintf(stderr, "Usage: %s der_key_file raw_key_file\n", argv[0]); fprintf(stderr, "Usage: %s der_key_file raw_key_file\n", argv[0]);
exit(1); exit(1);
@ -77,8 +79,16 @@ int main(int argc, char *argv[])
perror("opening output file"); perror("opening output file");
exit(5); exit(5);
} }
write(fd_out, Qx, qxlen); len = (uint32_t)write(fd_out, Qx, qxlen);
write(fd_out, Qy, qylen); if (len != qxlen) {
perror("write Qx - short");
exit(6);
}
len = write(fd_out, Qy, qylen);
if (len != qylen) {
perror("write Qy - short");
exit(7);
}
close(fd_out); close(fd_out);
return 0; return 0;
} }