diff options
Diffstat (limited to 'chip/host')
| -rw-r--r-- | chip/host/persistence.c | 36 |
1 files changed, 22 insertions, 14 deletions
diff --git a/chip/host/persistence.c b/chip/host/persistence.c index 4be2683bb1..dbd1ce812c 100644 --- a/chip/host/persistence.c +++ b/chip/host/persistence.c @@ -5,35 +5,43 @@ /* Persistence module for emulator */ +#include <linux/limits.h> #include <unistd.h> #include <stdio.h> #include <string.h> -#define BUF_SIZE 1024 - static void get_storage_path(char *out) { - char buf[BUF_SIZE]; + char buf[PATH_MAX]; int sz; + char *current; - sz = readlink("/proc/self/exe", buf, BUF_SIZE); + sz = readlink("/proc/self/exe", buf, PATH_MAX - 1); buf[sz] = '\0'; - if (snprintf(out, BUF_SIZE, "%s_persist", buf) >= BUF_SIZE) - out[BUF_SIZE - 1] = '\0'; + + /* replace / by underscores in the path to get the shared memory name */ + current = strchr(buf, '/'); + while (current) { + *current = '_'; + current = strchr(current, '/'); + } + + snprintf(out, PATH_MAX - 1, "/dev/shm/EC_persist_%s", buf); + out[PATH_MAX - 1] = '\0'; } FILE *get_persistent_storage(const char *tag, const char *mode) { - char buf[BUF_SIZE]; - char path[BUF_SIZE]; + char buf[PATH_MAX]; + char path[PATH_MAX]; /* * The persistent storage with tag 'foo' for test 'bar' would * be named 'bar_persist_foo' */ get_storage_path(buf); - if (snprintf(path, BUF_SIZE, "%s_%s", buf, tag) >= BUF_SIZE) - path[BUF_SIZE - 1] = '\0'; + snprintf(path, PATH_MAX - 1, "%s_%s", buf, tag); + path[PATH_MAX - 1] = '\0'; return fopen(path, mode); } @@ -45,12 +53,12 @@ void release_persistent_storage(FILE *ps) void remove_persistent_storage(const char *tag) { - char buf[BUF_SIZE]; - char path[BUF_SIZE]; + char buf[PATH_MAX]; + char path[PATH_MAX]; get_storage_path(buf); - if (snprintf(path, BUF_SIZE, "%s_%s", buf, tag) >= BUF_SIZE) - path[BUF_SIZE - 1] = '\0'; + snprintf(path, PATH_MAX - 1, "%s_%s", buf, tag); + path[PATH_MAX - 1] = '\0'; unlink(path); } |