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curl: add long option '--out-null'

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Add a new commandline option --out-null that discards all
response bytes into the void. Replaces non-portable use of
'-o /dev/null' with more efficiency.

Feature added in 8.16.0

Closes #17800
This commit is contained in:
Stefan Eissing 2025-07-02 09:43:13 +02:00 • committed by Daniel Stenberg
parent 0e49234128
commit 6845533e24
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GPG key ID: 5CC908FDB71E12C2
13 changed files with 137 additions and 6 deletions
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10
src/tool_getparam.c
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@ -224,6 +224,7 @@ static const struct LongShort aliases[]= {
{"ntlm", ARG_BOOL, ' ', C_NTLM},
{"ntlm-wb", ARG_BOOL|ARG_DEPR, ' ', C_NTLM_WB},
{"oauth2-bearer", ARG_STRG|ARG_CLEAR, ' ', C_OAUTH2_BEARER},
{"out-null", ARG_BOOL, ' ', C_OUT_NULL},
{"output", ARG_FILE, 'o', C_OUTPUT},
{"output-dir", ARG_STRG, ' ', C_OUTPUT_DIR},
{"parallel", ARG_BOOL, 'Z', C_PARALLEL},
@ -1310,9 +1311,13 @@ static ParameterError parse_output(struct OperationConfig *config,
return PARAM_NO_MEM;
/* fill in the outfile */
err = getstr(&url->outfile, nextarg, DENY_BLANK);
if(nextarg)
err = getstr(&url->outfile, nextarg, DENY_BLANK);
else
url->outfile = NULL;
url->useremote = FALSE; /* switch off */
url->outset = TRUE;
url->out_null = !nextarg;
return err;
}
@ -1351,6 +1356,7 @@ static ParameterError parse_remote_name(struct OperationConfig *config,
url->outfile = NULL; /* leave it */
url->useremote = toggle;
url->outset = TRUE;
url->out_null = FALSE;
return PARAM_OK;
}
@ -1833,6 +1839,8 @@ static ParameterError opt_bool(struct OperationConfig *config,
return PARAM_LIBCURL_DOESNT_SUPPORT;
togglebit(toggle, &config->authtype, CURLAUTH_NTLM);
break;
case C_OUT_NULL: /* --out-null */
return parse_output(config, NULL);
case C_BASIC: /* --basic */
togglebit(toggle, &config->authtype, CURLAUTH_BASIC);
break;