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27 lines
455 B
27 lines
455 B
6 years ago
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#include<stdlib.h>
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#include<stdio.h>
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#include<unistd.h>
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extern char **environ;
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char **env ;
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int main()
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{
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env= environ;
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while(*environ){
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puts(*environ);
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environ++;
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}
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char * p;
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puts("----------------------\n");
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if((p=getenv("USER")))
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printf("USER =%s\n",p);
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setenv("USER","test",1);
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printf("USER=%s\n",getenv("USER"));
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//unsetenv("USER");
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//printf("USER=%s\n",getenv("USER"));
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char * argv[]={"env2", NULL};
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execve("./env2",argv,env);
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return 0;
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}
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