vfork -> fork.  This home made popen() had the same bug as the library popen(), but worse.  The child calls execvp(), which calls malloc() a bit more than execl(), and it calls non-library functions that call malloc() and who-knows-what else (stdio is called in at least some error cases).
vfork -> fork.  This home made popen() had the same bug as the library
popen(), but worse.  The child calls execvp(), which calls malloc()
a bit more than execl(), and it calls non-library functions that call
malloc() and who-knows-what else (stdio is called in at least some
error cases).

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