diff options
Diffstat (limited to 'networking/udhcp')
| -rw-r--r-- | networking/udhcp/script.c | 66 |
1 files changed, 31 insertions, 35 deletions
diff --git a/networking/udhcp/script.c b/networking/udhcp/script.c index 4ae17fb..5d42a45 100644 --- a/networking/udhcp/script.c +++ b/networking/udhcp/script.c @@ -119,7 +119,8 @@ static char *alloc_fill_opts(uint8_t *option, const struct dhcp_option *type_p, } option += optlen; len -= optlen; - if (len <= 0) break; + if (len <= 0) + break; dest += sprintf(dest, " "); } return ret; @@ -130,9 +131,8 @@ static char *alloc_fill_opts(uint8_t *option, const struct dhcp_option *type_p, static char **fill_envp(struct dhcpMessage *packet) { int num_options = 0; - int i, j; - char **envp; - char *var; + int i; + char **envp, **curr; const char *opt_name; uint8_t *temp; char over = 0; @@ -156,21 +156,16 @@ static char **fill_envp(struct dhcpMessage *packet) num_options++; } - envp = xzalloc(sizeof(char *) * (num_options + 5)); - j = 0; - envp[j++] = xasprintf("interface=%s", client_config.interface); - var = getenv("PATH"); - if (var) - envp[j++] = xasprintf("PATH=%s", var); - var = getenv("HOME"); - if (var) - envp[j++] = xasprintf("HOME=%s", var); + curr = envp = xzalloc(sizeof(char *) * (num_options + 3)); + *curr = xasprintf("interface=%s", client_config.interface); + putenv(*curr++); if (packet == NULL) return envp; - envp[j] = xmalloc(sizeof("ip=255.255.255.255")); - sprintip(envp[j++], "ip=", (uint8_t *) &packet->yiaddr); + *curr = xmalloc(sizeof("ip=255.255.255.255")); + sprintip(*curr, "ip=", (uint8_t *) &packet->yiaddr); + putenv(*curr++); opt_name = dhcp_option_strings; i = 0; @@ -178,31 +173,36 @@ static char **fill_envp(struct dhcpMessage *packet) temp = get_option(packet, dhcp_options[i].code); if (!temp) goto next; - envp[j++] = alloc_fill_opts(temp, &dhcp_options[i], opt_name); + *curr = alloc_fill_opts(temp, &dhcp_options[i], opt_name); + putenv(*curr++); /* Fill in a subnet bits option for things like /24 */ if (dhcp_options[i].code == DHCP_SUBNET) { uint32_t subnet; move_from_unaligned32(subnet, temp); - envp[j++] = xasprintf("mask=%d", mton(subnet)); + *curr = xasprintf("mask=%d", mton(subnet)); + putenv(*curr++); } next: opt_name += strlen(opt_name) + 1; i++; } if (packet->siaddr) { - envp[j] = xmalloc(sizeof("siaddr=255.255.255.255")); - sprintip(envp[j++], "siaddr=", (uint8_t *) &packet->siaddr); + *curr = xmalloc(sizeof("siaddr=255.255.255.255")); + sprintip(*curr, "siaddr=", (uint8_t *) &packet->siaddr); + putenv(*curr++); } if (!(over & FILE_FIELD) && packet->file[0]) { /* watch out for invalid packets */ packet->file[sizeof(packet->file) - 1] = '\0'; - envp[j++] = xasprintf("boot_file=%s", packet->file); + *curr = xasprintf("boot_file=%s", packet->file); + putenv(*curr++); } if (!(over & SNAME_FIELD) && packet->sname[0]) { /* watch out for invalid packets */ packet->sname[sizeof(packet->sname) - 1] = '\0'; - envp[j++] = xasprintf("sname=%s", packet->sname); + *curr = xasprintf("sname=%s", packet->sname); + putenv(*curr++); } return envp; } @@ -211,29 +211,25 @@ static char **fill_envp(struct dhcpMessage *packet) /* Call a script with a par file and env vars */ void FAST_FUNC udhcp_run_script(struct dhcpMessage *packet, const char *name) { - int pid; char **envp, **curr; + char *argv[3]; if (client_config.script == NULL) return; - DEBUG("vfork'ing and execle'ing %s", client_config.script); + DEBUG("vfork'ing and exec'ing %s", client_config.script); envp = fill_envp(packet); /* call script */ -// can we use wait4pid(spawn(...)) here? - pid = vfork(); - if (pid < 0) return; - if (pid == 0) { - /* close fd's? */ - /* exec script */ - execle(client_config.script, client_config.script, - name, NULL, envp); - bb_perror_msg_and_die("exec %s", client_config.script); - } - safe_waitpid(pid, NULL, 0); - for (curr = envp; *curr; curr++) + argv[0] = (char*) client_config.script; + argv[1] = (char*) name; + argv[2] = NULL; + wait4pid(spawn(argv)); + + for (curr = envp; *curr; curr++) { + bb_unsetenv(*curr); free(*curr); + } free(envp); } |