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| author | Denis Vlasenko | 2007-03-06 22:53:10 +0000 |
|---|---|---|
| committer | Denis Vlasenko | 2007-03-06 22:53:10 +0000 |
| commit | c115fdbc800d7573d61db98c4697ed12078e7684 (patch) | |
| tree | 7d389439583b48b42692f10b121ffd4e7b24aa76 /networking/ifupdown.c | |
| parent | 9431e564aa5a595613929d4b1df82d811701febc (diff) | |
| download | busybox-c115fdbc800d7573d61db98c4697ed12078e7684.zip busybox-c115fdbc800d7573d61db98c4697ed12078e7684.tar.gz | |
ifupdown: code to deconstruct the state_list gracefully
(patch by Gabriel L. Somlo <somlo@cmu.edu>)
Diffstat (limited to 'networking/ifupdown.c')
| -rw-r--r-- | networking/ifupdown.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/networking/ifupdown.c b/networking/ifupdown.c index ccebecd..c7cb853 100644 --- a/networking/ifupdown.c +++ b/networking/ifupdown.c @@ -1091,6 +1091,7 @@ int ifupdown_main(int argc, char **argv) llist_t *state_list = NULL; llist_t *target_list = NULL; const char *interfaces = "/etc/network/interfaces"; + FILE *state_fp; int any_failures = 0; cmds = iface_down; @@ -1117,6 +1118,19 @@ int ifupdown_main(int argc, char **argv) startup_PATH = getenv("PATH"); if (!startup_PATH) startup_PATH = ""; + /* Read the previous state from the state file */ + state_fp = fopen_or_warn("/var/run/ifstate", "r"); + if (state_fp) { + char *start, *end_ptr; + while ((start = xmalloc_fgets(state_fp)) != NULL) { + /* We should only need to check for a single character */ + end_ptr = start + strcspn(start, " \t\n"); + *end_ptr = '\0'; + llist_add_to(&state_list, start); + } + fclose(state_fp); + } + /* Create a list of interfaces to work on */ if (DO_ALL) { if (cmds == iface_up) { @@ -1166,7 +1180,7 @@ int ifupdown_main(int argc, char **argv) } } else { /* ifdown */ - if (iface_state) { + if (!iface_state) { bb_error_msg("interface %s not configured", iface); continue; } @@ -1236,7 +1250,8 @@ int ifupdown_main(int argc, char **argv) iface_state->data = newiface; } } else { - /* Remove an interface from the linked list */ + /* Remove an interface from state_list */ + llist_unlink(&state_list, iface_state); free(llist_pop(&iface_state)); } } @@ -1244,8 +1259,6 @@ int ifupdown_main(int argc, char **argv) /* Actually write the new state */ if (!NO_ACT) { - FILE *state_fp; - state_fp = xfopen("/var/run/ifstate", "w"); while (state_list) { if (state_list->data) { |