mirror of
https://github.com/eddyem/eddys_snippets.git
synced 2025-12-06 02:35:12 +03:00
83 lines
1.7 KiB
C
83 lines
1.7 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <err.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <string.h>
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#define BUFSZ 1024
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static void getpath(const char *modname, char *buf, size_t bufsize){
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int filedes[2];
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char cmd[256];
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ssize_t count;
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snprintf(cmd, 255, "modinfo -F filename %s", modname);
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if(pipe(filedes) == -1)
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err(3, "pipe");
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pid_t pid = fork();
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if(pid == -1)
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err(4, "fork");
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else if (pid == 0){
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while ((dup2(filedes[1], STDOUT_FILENO) == -1) && (errno == EINTR)) {}
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close(filedes[1]);
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close(filedes[0]);
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system(cmd);
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exit(0);
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}
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while(1){
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count = read(filedes[0], buf, bufsize);
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if(count == -1){
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if(errno == EINTR)
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continue;
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else
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err(7, "read");
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}else
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break;
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}
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if(count > 1) buf[count-1] = 0;
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close(filedes[0]);
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wait(0);
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}
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int main(){
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int fd = open("/proc/modules", O_RDONLY);
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if(fd < 0) err(1, "open");
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char buf[BUFSZ+1], *end = buf;
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size_t readed, toread = BUFSZ;
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buf[BUFSZ] = 0;
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while(1){
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readed = read(fd, end, toread);
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if(readed < 1 && end == buf) break;
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end += readed;
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*end = 0;
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char *E;
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#define getspace(X) {E = strchr(X, ' '); if(!E) break; *E = 0; E++;}
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getspace(buf);
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char *name = buf, *start = E;
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if(start >= end) break;
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getspace(start);
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#undef getspace
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size_t size = atoll(start);
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char path[1024];
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getpath(name, path, sizeof(path));
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printf("%s: %zd\n", path, size);
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if(E < end){
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if((start = strchr(E, '\n'))) start++;
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else start = end;
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}else start = E;
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if(start < end){
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readed = end - start;
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memmove(buf, start, readed);
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end = buf + readed;
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toread = BUFSZ - readed;
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}else{
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toread = BUFSZ;
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end = buf;
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}
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}
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close(fd);
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return 0;
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}
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