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cgit.c: Do not restore unset environment variables

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getenv() returns a NULL pointer if the specified variable name cannot be
found in the environment. However, some setenv() implementations crash
if a NULL pointer is passed as second argument. Only restore variables
that are not NULL.

See commit d96d2c98ebc4c2d3765f5b35c4142e0e828a421b for a related patch.

Signed-off-by: Lukas Fleischer <cgit@cryptocrack.de>
This commit is contained in:
Lukas Fleischer 2013-04-10 12:30:52 +02:00 committed by Jason A. Donenfeld
parent 410da3ac1c
commit 8d8e84e72a
1 changed files with 4 additions and 2 deletions
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cgit.c
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@ -486,7 +486,9 @@ static int prepare_repo_cmd(struct cgit_context *ctx)
init_display_notes(NULL); init_display_notes(NULL);
/* We restore the unset variables afterward. */ /* We restore the unset variables afterward. */
if (user_home)
setenv("HOME", user_home, 1); setenv("HOME", user_home, 1);
if (xdg_home)
setenv("XDG_CONFIG_HOME", xdg_home, 1); setenv("XDG_CONFIG_HOME", xdg_home, 1);
if (nongit) { if (nongit) {