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sam: putenv("%", ...): don't crash when no file is current

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This commit is contained in:
ftrvxmtrx 2016-09-26 23:00:06 +02:00
parent d8b4f95476
commit ab3492f05e
1 changed files with 1 additions and 1 deletions
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2
sys/src/cmd/sam/shell.c
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@ -93,7 +93,7 @@ plan9(File *f, int type, String *s, int nest)
close(0); /* so it won't read from terminal */
open("/dev/null", 0);
}
putenv("%", Strtoc(&f->name));
putenv("%", f == nil ? "" : Strtoc(&f->name));
execl(SHPATH, SH, "-c", Strtoc(&plan9cmd), nil);
exits("exec");
}