| 1 | #include <stdlib.h> |
| 2 | #include <stdio.h> |
| 3 | #include <string.h> |
| 4 | #include <unistd.h> |
| 5 | #include <errno.h> |
| 6 | #include <dirent.h> |
| 7 | #include <stdarg.h> |
| 8 | #include <stdint.h> |
| 9 | #include <sys/stat.h> |
| 10 | #include <dpar.h> |
| 11 | #include <stdatomic.h> |
| 12 | |
| 13 | struct subdir { |
| 14 | struct subdir *parent; |
| 15 | char *path; |
| 16 | off_t sum; |
| 17 | int rv, subjobs, summary; |
| 18 | }; |
| 19 | |
| 20 | static int summary = 0; |
| 21 | static int retval = 0; |
| 22 | |
| 23 | static char *sprintf2(char *fmt, ...) |
| 24 | { |
| 25 | char *ret; |
| 26 | size_t sz; |
| 27 | FILE *fp; |
| 28 | va_list args; |
| 29 | |
| 30 | fp = open_memstream(&ret, &sz); |
| 31 | va_start(args, fmt); |
| 32 | vfprintf(fp, fmt, args); |
| 33 | va_end(args); |
| 34 | fclose(fp); |
| 35 | return(ret); |
| 36 | } |
| 37 | |
| 38 | static void printres(struct subdir *job) |
| 39 | { |
| 40 | printf("%ji\t%s\n", (intmax_t)(job->sum / 1024), job->path); |
| 41 | } |
| 42 | |
| 43 | static void finish(struct subdir *job) |
| 44 | { |
| 45 | if(atomic_fetch_sub(&job->subjobs, 1) == 1) { |
| 46 | if(job->summary) |
| 47 | printres(job); |
| 48 | if(job->parent) { |
| 49 | atomic_fetch_add(&job->parent->sum, job->sum); |
| 50 | finish(job->parent); |
| 51 | } |
| 52 | free(job->path); |
| 53 | free(job); |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | static void dodir(void *jobp) |
| 58 | { |
| 59 | struct subdir *job = jobp; |
| 60 | DIR *dp; |
| 61 | struct dirent *dent, dbuf; |
| 62 | struct stat sb; |
| 63 | struct subdir *nj; |
| 64 | char *ep; |
| 65 | |
| 66 | if((dp = opendir(job->path)) == NULL) { |
| 67 | fprintf(stderr, "pdu: %s: %s\n", job->path, strerror(errno)); |
| 68 | job->rv = 1; |
| 69 | return; |
| 70 | } |
| 71 | job->subjobs = 1; |
| 72 | while(1) { |
| 73 | if(readdir_r(dp, &dbuf, &dent)) { |
| 74 | fprintf(stderr, "pdu: reading %s: %s\n", job->path, strerror(errno)); |
| 75 | job->rv = 1; |
| 76 | break; |
| 77 | } |
| 78 | if(!dent) |
| 79 | break; |
| 80 | if(!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, "..")) |
| 81 | continue; |
| 82 | ep = sprintf2("%s/%s", job->path, dent->d_name); |
| 83 | if(stat(ep, &sb)) { |
| 84 | fprintf(stderr, "pdu: stat %s: %s\n", ep, strerror(errno)); |
| 85 | } else { |
| 86 | if(S_ISDIR(sb.st_mode)) { |
| 87 | *(nj = malloc(sizeof(*nj))) = (struct subdir) { |
| 88 | .path = strdup(ep), |
| 89 | .summary = !summary, |
| 90 | .parent = job, |
| 91 | }; |
| 92 | atomic_fetch_add(&job->subjobs, 1); |
| 93 | atomic_fetch_add(&job->sum, (off_t)sb.st_blocks * 512); |
| 94 | submitiowork(dodir, nj); |
| 95 | } else if(S_ISREG(sb.st_mode)) { |
| 96 | atomic_fetch_add(&job->sum, (off_t)sb.st_blocks * 512); |
| 97 | } |
| 98 | } |
| 99 | free(ep); |
| 100 | } |
| 101 | closedir(dp); |
| 102 | finish(job); |
| 103 | } |
| 104 | |
| 105 | static void dodu(char *path) |
| 106 | { |
| 107 | struct subdir *job; |
| 108 | |
| 109 | *(job = malloc(sizeof(*job))) = (struct subdir) { |
| 110 | .path = strdup(path), |
| 111 | .summary = 1, |
| 112 | }; |
| 113 | submitiowork(dodir, job); |
| 114 | } |
| 115 | |
| 116 | static void usage(FILE *out) |
| 117 | { |
| 118 | fprintf(out, "usage: pdu [-sh] [DIRECTORY...]\n"); |
| 119 | } |
| 120 | |
| 121 | int main(int argc, char **argv) |
| 122 | { |
| 123 | int i, c; |
| 124 | |
| 125 | while((c = getopt(argc, argv, "hs")) != -1) { |
| 126 | switch(c) { |
| 127 | case 's': |
| 128 | summary = 1; |
| 129 | break; |
| 130 | case 'h': |
| 131 | usage(stdout); |
| 132 | exit(0); |
| 133 | default: |
| 134 | usage(stderr); |
| 135 | exit(1); |
| 136 | } |
| 137 | } |
| 138 | if(optind < argc) { |
| 139 | for(i = optind; i < argc; i++) |
| 140 | dodu(argv[i]); |
| 141 | } else { |
| 142 | dodu("."); |
| 143 | } |
| 144 | joinwork(); |
| 145 | return(retval); |
| 146 | } |
| 147 | |
| 148 | /* |
| 149 | * Local Variables: |
| 150 | * compile-command: "gcc -Wall -g -o pdu pdu.c -ldpar" |
| 151 | * End: |
| 152 | */ |