86 lines
1.6 KiB
C
86 lines
1.6 KiB
C
#include "kernel/types.h"
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#include "kernel/stat.h"
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#include "user/user.h"
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#include "kernel/fs.h"
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char *
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fmtname(char *path)
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{
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static char buf[DIRSIZ + 1];
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char *p;
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// Find first character after last slash.
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for(p = path + strlen(path); p >= path && *p != '/'; p--)
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;
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p++;
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// Return blank-padded name.
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if(strlen(p) >= DIRSIZ)
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return p;
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memmove(buf, p, strlen(p));
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memset(buf + strlen(p), ' ', DIRSIZ - strlen(p));
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return buf;
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}
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void
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ls(char *path)
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{
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char buf[512], *p;
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int fd;
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struct dirent de;
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struct stat st;
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if((fd = open(path, 0)) < 0) {
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fprintf(2, "ls: cannot open %s\n", path);
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return;
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}
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if(fstat(fd, &st) < 0) {
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fprintf(2, "ls: cannot stat %s\n", path);
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close(fd);
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return;
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}
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switch(st.type) {
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case T_DEVICE:
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case T_FILE:
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printf("%s %d %d %l\n", fmtname(path), st.type, st.ino, st.size);
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break;
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case T_DIR:
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if(strlen(path) + 1 + DIRSIZ + 1 > sizeof buf) {
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printf("ls: path too long\n");
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break;
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}
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strcpy(buf, path);
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p = buf + strlen(buf);
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*p++ = '/';
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while(read(fd, &de, sizeof(de)) == sizeof(de)) {
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if(de.inum == 0)
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continue;
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memmove(p, de.name, DIRSIZ);
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p[DIRSIZ] = 0;
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if(stat(buf, &st) < 0) {
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printf("ls: cannot stat %s\n", buf);
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continue;
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}
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printf("%s %d %d %d\n", fmtname(buf), st.type, st.ino, st.size);
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}
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break;
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}
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close(fd);
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}
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int
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main(int argc, char *argv[])
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{
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int i;
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if(argc < 2) {
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ls(".");
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exit(0);
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}
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for(i = 1; i < argc; i++)
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ls(argv[i]);
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exit(0);
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}
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