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Log empty value if envvar is not defined

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If the environment variable is not defined, getenv returns NULL.
Passing a NULL pointer to the "%s" format specifier is undefined
behavior. Even if some implementations output "(null)", an empty
string is nicer.
This commit is contained in:
Antonin Décimo 2020-06-04 14:41:22 +02:00 committed by Tudor Brindus
parent 2960b2c9b6
commit a1c6052383
1 changed files with 2 additions and 1 deletions
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3
sway/main.c
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@ -138,7 +138,8 @@ static void log_env(void) {
"SWAYSOCK", "SWAYSOCK",
}; };
for (size_t i = 0; i < sizeof(log_vars) / sizeof(char *); ++i) { for (size_t i = 0; i < sizeof(log_vars) / sizeof(char *); ++i) {
sway_log(SWAY_INFO, "%s=%s", log_vars[i], getenv(log_vars[i])); char *value = getenv(log_vars[i]);
sway_log(SWAY_INFO, "%s=%s", log_vars[i], value != NULL ? value : "");
} }
} }