| /* |
| * ifstat.c handy utility to read net interface statistics |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| * |
| * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <time.h> |
| #include <sys/time.h> |
| #include <fnmatch.h> |
| #include <sys/file.h> |
| #include <sys/socket.h> |
| #include <sys/un.h> |
| #include <sys/poll.h> |
| #include <sys/wait.h> |
| #include <sys/stat.h> |
| #include <signal.h> |
| #include <math.h> |
| #include <getopt.h> |
| |
| #include <libnetlink.h> |
| #include <json_writer.h> |
| #include <linux/if.h> |
| #include <linux/if_link.h> |
| |
| #include <SNAPSHOT.h> |
| |
| int dump_zeros = 0; |
| int reset_history = 0; |
| int ignore_history = 0; |
| int no_output = 0; |
| int json_output = 0; |
| int no_update = 0; |
| int scan_interval = 0; |
| int time_constant = 0; |
| int show_errors = 0; |
| int pretty; |
| double W; |
| char **patterns; |
| int npatterns; |
| |
| char info_source[128]; |
| int source_mismatch; |
| |
| #define MAXS (sizeof(struct rtnl_link_stats)/sizeof(__u32)) |
| |
| struct ifstat_ent |
| { |
| struct ifstat_ent *next; |
| char *name; |
| int ifindex; |
| unsigned long long val[MAXS]; |
| double rate[MAXS]; |
| __u32 ival[MAXS]; |
| }; |
| |
| static const char *stats[MAXS] = { |
| "rx_packets", |
| "tx_packets", |
| "rx_bytes", |
| "tx_bytes", |
| "rx_errors", |
| "tx_errors", |
| "rx_dropped", |
| "tx_dropped", |
| "multicast", |
| "collisions", |
| "rx_length_errors", |
| "rx_over_errors", |
| "rx_crc_errors", |
| "rx_frame_errors", |
| "rx_fifo_errors", |
| "rx_missed_errors", |
| "tx_aborted_errors", |
| "tx_carrier_errors", |
| "tx_fifo_errors", |
| "tx_heartbeat_errors", |
| "tx_window_errors", |
| "rx_compressed", |
| "tx_compressed" |
| }; |
| |
| struct ifstat_ent *kern_db; |
| struct ifstat_ent *hist_db; |
| |
| static int match(const char *id) |
| { |
| int i; |
| |
| if (npatterns == 0) |
| return 1; |
| |
| for (i=0; i<npatterns; i++) { |
| if (!fnmatch(patterns[i], id, 0)) |
| return 1; |
| } |
| return 0; |
| } |
| |
| static int get_nlmsg(const struct sockaddr_nl *who, |
| struct nlmsghdr *m, void *arg) |
| { |
| struct ifinfomsg *ifi = NLMSG_DATA(m); |
| struct rtattr * tb[IFLA_MAX+1]; |
| int len = m->nlmsg_len; |
| struct ifstat_ent *n; |
| int i; |
| |
| if (m->nlmsg_type != RTM_NEWLINK) |
| return 0; |
| |
| len -= NLMSG_LENGTH(sizeof(*ifi)); |
| if (len < 0) |
| return -1; |
| |
| if (!(ifi->ifi_flags&IFF_UP)) |
| return 0; |
| |
| parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len); |
| if (tb[IFLA_IFNAME] == NULL || tb[IFLA_STATS] == NULL) |
| return 0; |
| |
| n = malloc(sizeof(*n)); |
| if (!n) |
| abort(); |
| n->ifindex = ifi->ifi_index; |
| n->name = strdup(RTA_DATA(tb[IFLA_IFNAME])); |
| memcpy(&n->ival, RTA_DATA(tb[IFLA_STATS]), sizeof(n->ival)); |
| memset(&n->rate, 0, sizeof(n->rate)); |
| for (i=0; i<MAXS; i++) |
| n->val[i] = n->ival[i]; |
| n->next = kern_db; |
| kern_db = n; |
| return 0; |
| } |
| |
| static void load_info(void) |
| { |
| struct ifstat_ent *db, *n; |
| struct rtnl_handle rth; |
| |
| if (rtnl_open(&rth, 0) < 0) |
| exit(1); |
| |
| if (rtnl_wilddump_request(&rth, AF_INET, RTM_GETLINK) < 0) { |
| perror("Cannot send dump request"); |
| exit(1); |
| } |
| |
| if (rtnl_dump_filter(&rth, get_nlmsg, NULL) < 0) { |
| fprintf(stderr, "Dump terminated\n"); |
| exit(1); |
| } |
| |
| rtnl_close(&rth); |
| |
| db = kern_db; |
| kern_db = NULL; |
| |
| while (db) { |
| n = db; |
| db = db->next; |
| n->next = kern_db; |
| kern_db = n; |
| } |
| } |
| |
| static void load_raw_table(FILE *fp) |
| { |
| char buf[4096]; |
| struct ifstat_ent *db = NULL; |
| struct ifstat_ent *n; |
| |
| while (fgets(buf, sizeof(buf), fp) != NULL) { |
| char *p; |
| char *next; |
| int i; |
| |
| if (buf[0] == '#') { |
| buf[strlen(buf)-1] = 0; |
| if (info_source[0] && strcmp(info_source, buf+1)) |
| source_mismatch = 1; |
| strncpy(info_source, buf+1, sizeof(info_source)-1); |
| continue; |
| } |
| if ((n = malloc(sizeof(*n))) == NULL) |
| abort(); |
| |
| if (!(p = strchr(buf, ' '))) |
| abort(); |
| *p++ = 0; |
| |
| if (sscanf(buf, "%d", &n->ifindex) != 1) |
| abort(); |
| if (!(next = strchr(p, ' '))) |
| abort(); |
| *next++ = 0; |
| |
| n->name = strdup(p); |
| p = next; |
| |
| for (i=0; i<MAXS; i++) { |
| unsigned rate; |
| if (!(next = strchr(p, ' '))) |
| abort(); |
| *next++ = 0; |
| if (sscanf(p, "%llu", n->val+i) != 1) |
| abort(); |
| n->ival[i] = (__u32)n->val[i]; |
| p = next; |
| if (!(next = strchr(p, ' '))) |
| abort(); |
| *next++ = 0; |
| if (sscanf(p, "%u", &rate) != 1) |
| abort(); |
| n->rate[i] = rate; |
| p = next; |
| } |
| n->next = db; |
| db = n; |
| } |
| |
| while (db) { |
| n = db; |
| db = db->next; |
| n->next = kern_db; |
| kern_db = n; |
| } |
| } |
| |
| static void dump_raw_db(FILE *fp, int to_hist) |
| { |
| json_writer_t *jw = json_output ? jsonw_new(fp) : NULL; |
| struct ifstat_ent *n, *h; |
| |
| h = hist_db; |
| if (jw) { |
| jsonw_pretty(jw, pretty); |
| jsonw_name(jw, info_source); |
| jsonw_start_object(jw); |
| } else |
| fprintf(fp, "#%s\n", info_source); |
| |
| for (n=kern_db; n; n=n->next) { |
| int i; |
| unsigned long long *vals = n->val; |
| double *rates = n->rate; |
| if (!match(n->name)) { |
| struct ifstat_ent *h1; |
| if (!to_hist) |
| continue; |
| for (h1 = h; h1; h1 = h1->next) { |
| if (h1->ifindex == n->ifindex) { |
| vals = h1->val; |
| rates = h1->rate; |
| h = h1->next; |
| break; |
| } |
| } |
| } |
| |
| if (jw) { |
| jsonw_name(jw, n->name); |
| jsonw_start_object(jw); |
| |
| for (i=0; i<MAXS && stats[i]; i++) |
| jsonw_uint_field(jw, stats[i], vals[i]); |
| jsonw_end_object(jw); |
| } else { |
| fprintf(fp, "%d %s ", n->ifindex, n->name); |
| for (i=0; i<MAXS; i++) |
| fprintf(fp, "%llu %u ", vals[i], |
| (unsigned)rates[i]); |
| fprintf(fp, "\n"); |
| } |
| } |
| if (jw) { |
| jsonw_end_object(jw); |
| jsonw_destroy(&jw); |
| } |
| } |
| |
| /* use communication definitions of meg/kilo etc */ |
| static const unsigned long long giga = 1000000000ull; |
| static const unsigned long long mega = 1000000; |
| static const unsigned long long kilo = 1000; |
| |
| static void format_rate(FILE *fp, const unsigned long long *vals, |
| const double *rates, int i) |
| { |
| char temp[64]; |
| |
| if (vals[i] > giga) |
| fprintf(fp, "%7lluM ", vals[i]/mega); |
| else if (vals[i] > mega) |
| fprintf(fp, "%7lluK ", vals[i]/kilo); |
| else |
| fprintf(fp, "%8llu ", vals[i]); |
| |
| if (rates[i] > mega) { |
| sprintf(temp, "%uM", (unsigned)(rates[i]/mega)); |
| fprintf(fp, "%-6s ", temp); |
| } else if (rates[i] > kilo) { |
| sprintf(temp, "%uK", (unsigned)(rates[i]/kilo)); |
| fprintf(fp, "%-6s ", temp); |
| } else |
| fprintf(fp, "%-6u ", (unsigned)rates[i]); |
| } |
| |
| static void format_pair(FILE *fp, const unsigned long long *vals, int i, int k) |
| { |
| char temp[64]; |
| if (vals[i] > giga) |
| fprintf(fp, "%7lluM ", vals[i]/mega); |
| else if (vals[i] > mega) |
| fprintf(fp, "%7lluK ", vals[i]/kilo); |
| else |
| fprintf(fp, "%8llu ", vals[i]); |
| |
| if (vals[k] > giga) { |
| sprintf(temp, "%uM", (unsigned)(vals[k]/mega)); |
| fprintf(fp, "%-6s ", temp); |
| } else if (vals[k] > mega) { |
| sprintf(temp, "%uK", (unsigned)(vals[k]/kilo)); |
| fprintf(fp, "%-6s ", temp); |
| } else |
| fprintf(fp, "%-6u ", (unsigned)vals[k]); |
| } |
| |
| static void print_head(FILE *fp) |
| { |
| fprintf(fp, "#%s\n", info_source); |
| fprintf(fp, "%-15s ", "Interface"); |
| |
| fprintf(fp, "%8s/%-6s ", "RX Pkts", "Rate"); |
| fprintf(fp, "%8s/%-6s ", "TX Pkts", "Rate"); |
| fprintf(fp, "%8s/%-6s ", "RX Data", "Rate"); |
| fprintf(fp, "%8s/%-6s\n","TX Data", "Rate"); |
| |
| if (!show_errors) { |
| fprintf(fp, "%-15s ", ""); |
| fprintf(fp, "%8s/%-6s ", "RX Errs", "Drop"); |
| fprintf(fp, "%8s/%-6s ", "TX Errs", "Drop"); |
| fprintf(fp, "%8s/%-6s ", "RX Over", "Rate"); |
| fprintf(fp, "%8s/%-6s\n","TX Coll", "Rate"); |
| } else { |
| fprintf(fp, "%-15s ", ""); |
| fprintf(fp, "%8s/%-6s ", "RX Errs", "Rate"); |
| fprintf(fp, "%8s/%-6s ", "RX Drop", "Rate"); |
| fprintf(fp, "%8s/%-6s ", "RX Over", "Rate"); |
| fprintf(fp, "%8s/%-6s\n","RX Leng", "Rate"); |
| |
| fprintf(fp, "%-15s ", ""); |
| fprintf(fp, "%8s/%-6s ", "RX Crc", "Rate"); |
| fprintf(fp, "%8s/%-6s ", "RX Frm", "Rate"); |
| fprintf(fp, "%8s/%-6s ", "RX Fifo", "Rate"); |
| fprintf(fp, "%8s/%-6s\n","RX Miss", "Rate"); |
| |
| fprintf(fp, "%-15s ", ""); |
| fprintf(fp, "%8s/%-6s ", "TX Errs", "Rate"); |
| fprintf(fp, "%8s/%-6s ", "TX Drop", "Rate"); |
| fprintf(fp, "%8s/%-6s ", "TX Coll", "Rate"); |
| fprintf(fp, "%8s/%-6s\n","TX Carr", "Rate"); |
| |
| fprintf(fp, "%-15s ", ""); |
| fprintf(fp, "%8s/%-6s ", "TX Abrt", "Rate"); |
| fprintf(fp, "%8s/%-6s ", "TX Fifo", "Rate"); |
| fprintf(fp, "%8s/%-6s ", "TX Hear", "Rate"); |
| fprintf(fp, "%8s/%-6s\n","TX Wind", "Rate"); |
| } |
| } |
| |
| static void print_one_json(json_writer_t *jw, const struct ifstat_ent *n, |
| const unsigned long long *vals) |
| { |
| int i, m = show_errors ? 20 : 10; |
| |
| jsonw_name(jw, n->name); |
| jsonw_start_object(jw); |
| |
| for (i=0; i < m && stats[i]; i++) |
| jsonw_uint_field(jw, stats[i], vals[i]); |
| |
| jsonw_end_object(jw); |
| } |
| |
| static void print_one_if(FILE *fp, const struct ifstat_ent *n, |
| const unsigned long long *vals) |
| { |
| int i; |
| |
| fprintf(fp, "%-15s ", n->name); |
| for (i=0; i<4; i++) |
| format_rate(fp, vals, n->rate, i); |
| fprintf(fp, "\n"); |
| |
| if (!show_errors) { |
| fprintf(fp, "%-15s ", ""); |
| format_pair(fp, vals, 4, 6); |
| format_pair(fp, vals, 5, 7); |
| format_rate(fp, vals, n->rate, 11); |
| format_rate(fp, vals, n->rate, 9); |
| fprintf(fp, "\n"); |
| } else { |
| fprintf(fp, "%-15s ", ""); |
| format_rate(fp, vals, n->rate, 4); |
| format_rate(fp, vals, n->rate, 6); |
| format_rate(fp, vals, n->rate, 11); |
| format_rate(fp, vals, n->rate, 10); |
| fprintf(fp, "\n"); |
| |
| fprintf(fp, "%-15s ", ""); |
| format_rate(fp, vals, n->rate, 12); |
| format_rate(fp, vals, n->rate, 13); |
| format_rate(fp, vals, n->rate, 14); |
| format_rate(fp, vals, n->rate, 15); |
| fprintf(fp, "\n"); |
| |
| fprintf(fp, "%-15s ", ""); |
| format_rate(fp, vals, n->rate, 5); |
| format_rate(fp, vals, n->rate, 7); |
| format_rate(fp, vals, n->rate, 9); |
| format_rate(fp, vals, n->rate, 17); |
| fprintf(fp, "\n"); |
| |
| fprintf(fp, "%-15s ", ""); |
| format_rate(fp, vals, n->rate, 16); |
| format_rate(fp, vals, n->rate, 18); |
| format_rate(fp, vals, n->rate, 19); |
| format_rate(fp, vals, n->rate, 20); |
| fprintf(fp, "\n"); |
| } |
| } |
| |
| static void dump_kern_db(FILE *fp) |
| { |
| json_writer_t *jw = json_output ? jsonw_new(fp) : NULL; |
| struct ifstat_ent *n; |
| |
| if (jw) { |
| jsonw_pretty(jw, pretty); |
| jsonw_name(jw, info_source); |
| jsonw_start_object(jw); |
| } else |
| print_head(fp); |
| |
| for (n=kern_db; n; n=n->next) { |
| if (!match(n->name)) |
| continue; |
| |
| if (jw) |
| print_one_json(jw, n, n->val); |
| else |
| print_one_if(fp, n, n->val); |
| } |
| if (json_output) |
| fprintf(fp, "\n} }\n"); |
| } |
| |
| static void dump_incr_db(FILE *fp) |
| { |
| struct ifstat_ent *n, *h; |
| json_writer_t *jw = json_output ? jsonw_new(fp) : NULL; |
| |
| h = hist_db; |
| if (jw) { |
| jsonw_pretty(jw, pretty); |
| jsonw_name(jw, info_source); |
| jsonw_start_object(jw); |
| } else |
| print_head(fp); |
| |
| for (n=kern_db; n; n=n->next) { |
| int i; |
| unsigned long long vals[MAXS]; |
| struct ifstat_ent *h1; |
| |
| memcpy(vals, n->val, sizeof(vals)); |
| |
| for (h1 = h; h1; h1 = h1->next) { |
| if (h1->ifindex == n->ifindex) { |
| for (i = 0; i < MAXS; i++) |
| vals[i] -= h1->val[i]; |
| h = h1->next; |
| break; |
| } |
| } |
| if (!match(n->name)) |
| continue; |
| |
| if (jw) |
| print_one_json(jw, n, n->val); |
| else |
| print_one_if(fp, n, vals); |
| } |
| |
| if (jw) { |
| jsonw_end_object(jw); |
| jsonw_destroy(&jw); |
| } |
| } |
| |
| static int children; |
| |
| static void sigchild(int signo) |
| { |
| } |
| |
| static void update_db(int interval) |
| { |
| struct ifstat_ent *n, *h; |
| |
| n = kern_db; |
| kern_db = NULL; |
| |
| load_info(); |
| |
| h = kern_db; |
| kern_db = n; |
| |
| for (n = kern_db; n; n = n->next) { |
| struct ifstat_ent *h1; |
| for (h1 = h; h1; h1 = h1->next) { |
| if (h1->ifindex == n->ifindex) { |
| int i; |
| for (i = 0; i < MAXS; i++) { |
| if ((long)(h1->ival[i] - n->ival[i]) < 0) { |
| memset(n->ival, 0, sizeof(n->ival)); |
| break; |
| } |
| } |
| for (i = 0; i < MAXS; i++) { |
| double sample; |
| unsigned long incr = h1->ival[i] - n->ival[i]; |
| n->val[i] += incr; |
| n->ival[i] = h1->ival[i]; |
| sample = (double)(incr*1000)/interval; |
| if (interval >= scan_interval) { |
| n->rate[i] += W*(sample-n->rate[i]); |
| } else if (interval >= 1000) { |
| if (interval >= time_constant) { |
| n->rate[i] = sample; |
| } else { |
| double w = W*(double)interval/scan_interval; |
| n->rate[i] += w*(sample-n->rate[i]); |
| } |
| } |
| } |
| |
| while (h != h1) { |
| struct ifstat_ent *tmp = h; |
| h = h->next; |
| free(tmp->name); |
| free(tmp); |
| }; |
| h = h1->next; |
| free(h1->name); |
| free(h1); |
| break; |
| } |
| } |
| } |
| } |
| |
| #define T_DIFF(a,b) (((a).tv_sec-(b).tv_sec)*1000 + ((a).tv_usec-(b).tv_usec)/1000) |
| |
| |
| static void server_loop(int fd) |
| { |
| struct timeval snaptime = { 0 }; |
| struct pollfd p; |
| p.fd = fd; |
| p.events = p.revents = POLLIN; |
| |
| sprintf(info_source, "%d.%lu sampling_interval=%d time_const=%d", |
| getpid(), (unsigned long)random(), scan_interval/1000, time_constant/1000); |
| |
| load_info(); |
| |
| for (;;) { |
| int status; |
| int tdiff; |
| struct timeval now; |
| |
| gettimeofday(&now, NULL); |
| tdiff = T_DIFF(now, snaptime); |
| if (tdiff >= scan_interval) { |
| update_db(tdiff); |
| snaptime = now; |
| tdiff = 0; |
| } |
| |
| if (poll(&p, 1, tdiff + scan_interval) > 0 |
| && (p.revents&POLLIN)) { |
| int clnt = accept(fd, NULL, NULL); |
| if (clnt >= 0) { |
| pid_t pid; |
| if (children >= 5) { |
| close(clnt); |
| } else if ((pid = fork()) != 0) { |
| if (pid>0) |
| children++; |
| close(clnt); |
| } else { |
| FILE *fp = fdopen(clnt, "w"); |
| if (fp) { |
| if (tdiff > 0) |
| update_db(tdiff); |
| dump_raw_db(fp, 0); |
| } |
| exit(0); |
| } |
| } |
| } |
| while (children && waitpid(-1, &status, WNOHANG) > 0) |
| children--; |
| } |
| } |
| |
| static int verify_forging(int fd) |
| { |
| struct ucred cred; |
| socklen_t olen = sizeof(cred); |
| |
| if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, (void*)&cred, &olen) || |
| olen < sizeof(cred)) |
| return -1; |
| if (cred.uid == getuid() || cred.uid == 0) |
| return 0; |
| return -1; |
| } |
| |
| static void usage(void) __attribute__((noreturn)); |
| |
| static void usage(void) |
| { |
| fprintf(stderr, |
| "Usage: ifstat [OPTION] [ PATTERN [ PATTERN ] ]\n" |
| " -h, --help this message\n" |
| " -a, --ignore ignore history\n" |
| " -d, --scan=SECS sample every statistics every SECS\n" |
| " -e, --errors show errors\n" |
| " -j, --json format output in JSON\n" |
| " -n, --nooutput do history only\n" |
| " -p, --pretty pretty print\n" |
| " -r, --reset reset history\n" |
| " -s, --noupdate don\'t update history\n" |
| " -t, --interval=SECS report average over the last SECS\n" |
| " -V, --version output version information\n" |
| " -z, --zeros show entries with zero activity\n"); |
| |
| exit(-1); |
| } |
| |
| static const struct option longopts[] = { |
| { "help", 0, 0, 'h' }, |
| { "ignore", 0, 0, 'a' }, |
| { "scan", 1, 0, 'd'}, |
| { "errors", 0, 0, 'e' }, |
| { "nooutput", 0, 0, 'n' }, |
| { "json", 0, 0, 'j' }, |
| { "reset", 0, 0, 'r' }, |
| { "pretty", 0, 0, 'p' }, |
| { "noupdate", 0, 0, 's' }, |
| { "interval", 1, 0, 't' }, |
| { "version", 0, 0, 'V' }, |
| { "zeros", 0, 0, 'z' }, |
| { 0 } |
| }; |
| |
| int main(int argc, char *argv[]) |
| { |
| char hist_name[128]; |
| struct sockaddr_un sun; |
| FILE *hist_fp = NULL; |
| int ch; |
| int fd; |
| |
| while ((ch = getopt_long(argc, argv, "hjpvVzrnasd:t:e", |
| longopts, NULL)) != EOF) { |
| switch(ch) { |
| case 'z': |
| dump_zeros = 1; |
| break; |
| case 'r': |
| reset_history = 1; |
| break; |
| case 'a': |
| ignore_history = 1; |
| break; |
| case 's': |
| no_update = 1; |
| break; |
| case 'n': |
| no_output = 1; |
| break; |
| case 'e': |
| show_errors = 1; |
| break; |
| case 'j': |
| json_output = 1; |
| break; |
| case 'p': |
| pretty = 1; |
| break; |
| case 'd': |
| scan_interval = atoi(optarg) * 1000; |
| if (scan_interval <= 0) { |
| fprintf(stderr, "ifstat: invalid scan interval\n"); |
| exit(-1); |
| } |
| break; |
| case 't': |
| time_constant = atoi(optarg); |
| if (time_constant <= 0) { |
| fprintf(stderr, "ifstat: invalid time constant divisor\n"); |
| exit(-1); |
| } |
| break; |
| case 'v': |
| case 'V': |
| printf("ifstat utility, iproute2-ss%s\n", SNAPSHOT); |
| exit(0); |
| case 'h': |
| case '?': |
| default: |
| usage(); |
| } |
| } |
| |
| argc -= optind; |
| argv += optind; |
| |
| sun.sun_family = AF_UNIX; |
| sun.sun_path[0] = 0; |
| sprintf(sun.sun_path+1, "ifstat%d", getuid()); |
| |
| if (scan_interval > 0) { |
| if (time_constant == 0) |
| time_constant = 60; |
| time_constant *= 1000; |
| W = 1 - 1/exp(log(10)*(double)scan_interval/time_constant); |
| if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { |
| perror("ifstat: socket"); |
| exit(-1); |
| } |
| if (bind(fd, (struct sockaddr*)&sun, 2+1+strlen(sun.sun_path+1)) < 0) { |
| perror("ifstat: bind"); |
| exit(-1); |
| } |
| if (listen(fd, 5) < 0) { |
| perror("ifstat: listen"); |
| exit(-1); |
| } |
| if (daemon(0, 0)) { |
| perror("ifstat: daemon"); |
| exit(-1); |
| } |
| signal(SIGPIPE, SIG_IGN); |
| signal(SIGCHLD, sigchild); |
| server_loop(fd); |
| exit(0); |
| } |
| |
| patterns = argv; |
| npatterns = argc; |
| |
| if (getenv("IFSTAT_HISTORY")) |
| snprintf(hist_name, sizeof(hist_name), |
| "%s", getenv("IFSTAT_HISTORY")); |
| else |
| snprintf(hist_name, sizeof(hist_name), |
| "%s/.ifstat.u%d", P_tmpdir, getuid()); |
| |
| if (reset_history) |
| unlink(hist_name); |
| |
| if (!ignore_history || !no_update) { |
| struct stat stb; |
| |
| fd = open(hist_name, O_RDWR|O_CREAT|O_NOFOLLOW, 0600); |
| if (fd < 0) { |
| perror("ifstat: open history file"); |
| exit(-1); |
| } |
| if ((hist_fp = fdopen(fd, "r+")) == NULL) { |
| perror("ifstat: fdopen history file"); |
| exit(-1); |
| } |
| if (flock(fileno(hist_fp), LOCK_EX)) { |
| perror("ifstat: flock history file"); |
| exit(-1); |
| } |
| if (fstat(fileno(hist_fp), &stb) != 0) { |
| perror("ifstat: fstat history file"); |
| exit(-1); |
| } |
| if (stb.st_nlink != 1 || stb.st_uid != getuid()) { |
| fprintf(stderr, "ifstat: something is so wrong with history file, that I prefer not to proceed.\n"); |
| exit(-1); |
| } |
| if (!ignore_history) { |
| FILE *tfp; |
| long uptime = -1; |
| if ((tfp = fopen("/proc/uptime", "r")) != NULL) { |
| if (fscanf(tfp, "%ld", &uptime) != 1) |
| uptime = -1; |
| fclose(tfp); |
| } |
| if (uptime >= 0 && time(NULL) >= stb.st_mtime+uptime) { |
| fprintf(stderr, "ifstat: history is aged out, resetting\n"); |
| if (ftruncate(fileno(hist_fp), 0)) |
| perror("ifstat: ftruncate"); |
| } |
| } |
| |
| load_raw_table(hist_fp); |
| |
| hist_db = kern_db; |
| kern_db = NULL; |
| } |
| |
| if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) >= 0 && |
| (connect(fd, (struct sockaddr*)&sun, 2+1+strlen(sun.sun_path+1)) == 0 |
| || (strcpy(sun.sun_path+1, "ifstat0"), |
| connect(fd, (struct sockaddr*)&sun, 2+1+strlen(sun.sun_path+1)) == 0)) |
| && verify_forging(fd) == 0) { |
| FILE *sfp = fdopen(fd, "r"); |
| load_raw_table(sfp); |
| if (hist_db && source_mismatch) { |
| fprintf(stderr, "ifstat: history is stale, ignoring it.\n"); |
| hist_db = NULL; |
| } |
| fclose(sfp); |
| } else { |
| if (fd >= 0) |
| close(fd); |
| if (hist_db && info_source[0] && strcmp(info_source, "kernel")) { |
| fprintf(stderr, "ifstat: history is stale, ignoring it.\n"); |
| hist_db = NULL; |
| info_source[0] = 0; |
| } |
| load_info(); |
| if (info_source[0] == 0) |
| strcpy(info_source, "kernel"); |
| } |
| |
| if (!no_output) { |
| if (ignore_history || hist_db == NULL) |
| dump_kern_db(stdout); |
| else |
| dump_incr_db(stdout); |
| } |
| |
| if (!no_update) { |
| if (ftruncate(fileno(hist_fp), 0)) |
| perror("ifstat: ftruncate"); |
| rewind(hist_fp); |
| |
| json_output = 0; |
| dump_raw_db(hist_fp, 1); |
| fclose(hist_fp); |
| } |
| exit(0); |
| } |