kreyren/OSHW-DEIMOS
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check if su

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This commit is contained in:
Chris Boudacoff 2018-03-14 14:54:59 +02:00 committed by GitHub
parent b25626a010
commit e4dbe8ed35
Signed by: GitHub
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 16 additions and 7 deletions
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23
SOFTWARE/A64-TERES/teres1-debug/teres1-debug.c
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@ -19,6 +19,8 @@
#include <unistd.h>
#include <string.h>
#include <linux/input.h>
#include <unistd.h>
#include <sys/types.h>
#define DEBUGEN 361
@ -37,6 +39,7 @@ void export_gpio(int gpio)
fd = open(buf, O_WRONLY);
write(fd, "out", 3);
close(fd);
}
void set_gpio(int gpio, int value)
@ -47,30 +50,36 @@ void set_gpio(int gpio, int value)
sprintf(buf, "%d", value);
write(fd, buf, 1);
close(fd);
}
void usage(void)
{
extern char *program_invocation_short_name;
printf("USAGE:\n");
printf(" %s on|off\n", program_invocation_short_name);
printf(" sudo %s on|off\n", program_invocation_short_name);
printf("\n");
}
int main (int argc, char **argv)
{
int mode;
if (!argv[1])
{
usage();
uid_t uid=getuid(), euid=geteuid();
if (uid!=0 || uid!=euid || !argv[1]) {
usage();
exit(0);
}
}else{
if (strcmp(argv[1],"off")==0) mode = 1;
else if (strcmp(argv[1],"on")==0) mode = 0;
else { usage(); exit(0); }
//printf("Debug %d\r\n",mode);
export_gpio(DEBUGEN);
set_gpio(DEBUGEN, mode);
printf("Debuging via serial cable is %s\r\n",argv[1]);
return 0;
}
}