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Cygwin: newgrp: fix invalid usage of argv

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Fix an error message accessing argv[1] even after it has been
potentially moved.  Print group name from group DB instead.

Fixes: 8bd56ec873453 ("Cygwin: newgrp: first full version")
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen 2024-02-24 10:46:54 +01:00
parent 3e16e86a56
commit 808a95d24d
1 changed files with 2 additions and 1 deletions
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3
winsup/utils/newgrp.c
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@ -160,6 +160,7 @@ main (int argc, const char **argv)
if (argv[1] == NULL) if (argv[1] == NULL)
{ {
gid = pw->pw_gid; gid = pw->pw_gid;
gr = getgrgid (gid);
} }
else else
{ {
@ -179,7 +180,7 @@ main (int argc, const char **argv)
if (setgid (gid) != 0) if (setgid (gid) != 0)
{ {
fprintf (stderr, "%s: can't switch primary group to '%s'\n", fprintf (stderr, "%s: can't switch primary group to '%s'\n",
program_invocation_short_name, argv[1]); program_invocation_short_name, gr->gr_name);
return 2; return 2;
} }