sys_getexepath.c

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/* get the executable path */

#include "../fb.h"
#include <sys/stat.h>

char *fb_hGetExePath( char *dst, ssize_t maxlen )
{
        char *p;
        char linkname[1024];
        struct stat finfo;
        ssize_t len;

        sprintf(linkname, "/proc/%d/exe", getpid());
        if ((stat(linkname, &finfo) == 0) && ((len = readlink(linkname, dst, maxlen - 1)) > -1)) {
                /* Linux-like proc fs is available */
                dst[len] = '\0';
                p = strrchr(dst, '/');
                if (p == dst) /* keep the "/" rather than returning "" */
                        *(p + 1) = '\0';
                else if (p)
                        *p = '\0';
                else
                        dst[0] = '\0';
        } else {
                p = NULL;
        }

        return p;
}