systemctl: show Environment entries with whitespace
This makes the Environment entries more round-trippable: a similar format is used for input and output. It is certainly more useful for users, because showing [unprintable] on anything non-trivial makes systemctl show -p Environment useless in many cases. Fixes: #14723 and https://bugzilla.redhat.com/show_bug.cgi?id=1525593. $ systemctl --user show -p Environment run-*.service Environment=ASDF=asfd "SPACE= " Environment=ASDF=asfd "SPACE=\n\n\n" Environment=ASDF=asfd "TAB=\t\\" "FOO=X X"
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@ -21,6 +21,7 @@
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#include "bus-util.h"
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#include "cap-list.h"
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#include "cgroup-util.h"
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#include "escape.h"
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#include "mountpoint-util.h"
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#include "nsflags.h"
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#include "parse-util.h"
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@ -500,18 +501,20 @@ static int bus_print_property(const char *name, const char *expected_value, sd_b
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return r;
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while ((r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &str)) > 0) {
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bool good;
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_cleanup_free_ char *e = NULL;
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if (first && !value)
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printf("%s=", name);
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e = shell_maybe_quote(str, ESCAPE_BACKSLASH_ONELINE);
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if (!e)
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return -ENOMEM;
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/* This property has multiple space-separated values, so
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* neither spaces nor newlines can be allowed in a value. */
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good = str[strcspn(str, " \n")] == '\0';
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if (first) {
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if (!value)
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printf("%s=", name);
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first = false;
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} else
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fputs(" ", stdout);
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printf("%s%s", first ? "" : " ", good ? str : "[unprintable]");
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first = false;
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fputs(e, stdout);
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}
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if (r < 0)
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return r;
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