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Fix segfault when SHLVL env var is not available (#52)

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Vlad Glagolev 2017-10-08 00:02:29 -04:00 committed by Arun Prakash Jana
parent 8959a5b57d
commit d835f72c6c
1 changed files with 5 additions and 2 deletions
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7
nnn.c
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@ -559,6 +559,7 @@ spawn(char *file, char *arg1, char *arg2, char *dir, uchar flag)
{ {
pid_t pid; pid_t pid;
int status; int status;
char *shlvl;
if (flag & F_NORMAL) if (flag & F_NORMAL)
exitcurses(); exitcurses();
@ -568,10 +569,12 @@ spawn(char *file, char *arg1, char *arg2, char *dir, uchar flag)
if (dir != NULL) if (dir != NULL)
status = chdir(dir); status = chdir(dir);
shlvl = getenv("SHLVL");
/* Show a marker (to indicate nnn spawned shell) */ /* Show a marker (to indicate nnn spawned shell) */
if (flag & F_MARKER) { if (flag & F_MARKER && shlvl != NULL) {
printf("\n +-++-++-+\n | n n n |\n +-++-++-+\n\n"); printf("\n +-++-++-+\n | n n n |\n +-++-++-+\n\n");
printf("Spawned shell level: %d\n", atoi(getenv("SHLVL")) + 1); printf("Spawned shell level: %d\n", atoi(shlvl) + 1);
} }
/* Suppress stdout and stderr */ /* Suppress stdout and stderr */