Subversion Repositories planix.SVN

#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>

int
putenv(char *s)
{
        int f, n;
        char *value;
        char buf[300];

        value = strchr(s, '=');
        if (value) {
                n = value-s;
                if(n<=0 || n > sizeof(buf)-6)
                        return -1;
                strcpy(buf, "/env/");
                strncpy(buf+5, s, n);
                buf[n+5] = 0;
                f = creat(buf, 0666);
                if(f < 0)
                        return 1;
                value++;
                n = strlen(value);
                if(write(f, value, n) != n)
                        return -1;
                close(f);
                return 0;
        } else
                return -1;
}