snow/argv0-test
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parent: cry if execve returns

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snow flurry 2022-01-26 12:51:11 -08:00
parent 7ed3ffc7ea
commit c9151e7772
1 changed files with 4 additions and 1 deletions
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src/parent.c
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@ -1,9 +1,11 @@
#include <stdio.h> #include <stdio.h>
#include <unistd.h> #include <unistd.h>
#include <string.h>
int int
main(int argc, char **argv, char **envp) main(int argc, char **argv, char **envp)
{ {
int ret = 0;
char *arr = NULL; char *arr = NULL;
char **ptr = char **ptr =
#ifdef PTR_TO_NULL #ifdef PTR_TO_NULL
@ -14,7 +16,8 @@ main(int argc, char **argv, char **envp)
printf("%s: using just NULL as argv...\n", argv[0]); printf("%s: using just NULL as argv...\n", argv[0]);
#endif #endif
printf("%s: argv == %p\n", argv[0], ptr); printf("%s: argv == %p\n", argv[0], ptr);
execve(argv[1], ptr, envp); ret = execve(argv[1], ptr, envp);
printf("%s: execve failed ;_; got %s\n", argv[0], strerror(ret));
return 0; return 0;
} }