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Add -type option to find(1).

This commit is contained in:
Jonas 'Sortie' Termansen 2016-03-27 14:51:44 +02:00
parent 927ed5e01f
commit bc2f6842d1
1 changed files with 82 additions and 16 deletions
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98
utils/find.c
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2013, 2015 Jonas 'Sortie' Termansen.
* Copyright (c) 2013, 2015, 2016 Jonas 'Sortie' Termansen.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@ -30,6 +30,17 @@
#include <string.h>
#include <unistd.h>
#define TYPE_BLK (1 << 0)
#define TYPE_CHR (1 << 1)
#define TYPE_DIR (1 << 2)
#define TYPE_FIFO (1 << 3)
#define TYPE_LNK (1 << 4)
#define TYPE_REG (1 << 5)
#define TYPE_SOCK (1 << 6)
#define TYPE_OTHER (1 << 7)
#define ALL_TYPES (TYPE_BLK | TYPE_CHR | TYPE_DIR | TYPE_FIFO | \
TYPE_LNK | TYPE_REG | TYPE_SOCK | TYPE_OTHER)
char* AddElemToPath(const char* path, const char* elem)
{
size_t pathlen = strlen(path);
@ -45,22 +56,42 @@ char* AddElemToPath(const char* path, const char* elem)
return ret;
}
static const int TYPE_FILE = 1 << 0;
static const int TYPE_DIR = 1 << 1;
bool Find(int dirfd, const char* relpath, const char* path, int types)
bool find(int dirfd, const char* relpath, const char* path, int types)
{
bool ret = true;
int fd = openat(dirfd, relpath, O_RDONLY | O_SYMLINK_NOFOLLOW);
if ( fd < 0 ) { error(0, errno, "%s", path); return false; }
if ( fd < 0 )
{
error(0, errno, "%s", path);
return false;
}
struct stat st;
if ( fstat(fd, &st) ) { error(0, errno, "stat: %s", path); return false; }
if ( S_ISDIR(st.st_mode) )
if ( fstat(fd, &st) )
{
error(0, errno, "stat: %s", path);
return false;
}
if ( S_ISBLK(st.st_mode) )
{
if ( types & TYPE_BLK )
printf("%s\n", path);
}
else if ( S_ISCHR(st.st_mode) )
{
if ( types & TYPE_CHR )
printf("%s\n", path);
}
else if ( S_ISDIR(st.st_mode) )
{
if ( types & TYPE_DIR )
printf("%s\n", path);
DIR* dir = fdopendir(fd);
if ( !dir ) { error(0, errno, "fdopendir"); close(fd); return false; }
if ( !dir )
{
error(0, errno, "fdopendir");
close(fd);
return false;
}
struct dirent* entry;
while ( (entry = readdir(dir)) )
{
@ -68,19 +99,42 @@ bool Find(int dirfd, const char* relpath, const char* path, int types)
if ( !strcmp(name, ".") || !strcmp(name, "..") )
continue;
char* newpath = AddElemToPath(path, name);
if ( !Find(fd, name, newpath, types) )
if ( !find(fd, name, newpath, types) )
{
ret = false;
break;
}
}
closedir(dir);
}
else if ( S_ISFIFO(st.st_mode) )
{
if ( types & TYPE_FIFO )
printf("%s\n", path);
}
else if ( S_ISLNK(st.st_mode) )
{
if ( types & TYPE_LNK )
printf("%s\n", path);
}
else if ( S_ISREG(st.st_mode) )
{
if ( types & TYPE_FILE )
if ( types & TYPE_REG )
printf("%s\n", path);
}
else if ( S_ISSOCK(st.st_mode) )
{
if ( types & TYPE_SOCK )
printf("%s\n", path);
}
else
{
if ( types & TYPE_OTHER )
printf("%s\n", path);
}
if ( !S_ISDIR(st.st_mode) )
close(fd);
return ret;
}
@ -99,16 +153,28 @@ int main(int argc, char* argv[])
if ( path )
error(1, 0, "multiple paths are not supported");
path = arg;
continue;
}
else if ( !strcmp(arg, "-type") )
found_options = true;
if ( !strcmp(arg, "-type") )
{
if ( i + 1 == argc )
error(1, 0, "-type expects an argument");
arg = argv[++i];
if ( !strcmp(arg, "f") )
types |= TYPE_FILE;
if ( !strcmp(arg, "b") )
types |= TYPE_BLK;
else if ( !strcmp(arg, "c") )
types |= TYPE_CHR;
else if ( !strcmp(arg, "d") )
types |= TYPE_DIR;
else if ( !strcmp(arg, "f") )
types |= TYPE_REG;
else if ( !strcmp(arg, "l") )
types |= TYPE_LNK;
else if ( !strcmp(arg, "p") )
types |= TYPE_FIFO;
else if ( !strcmp(arg, "S") )
types |= TYPE_SOCK;
else
error(1, 0, "unknown `-type %s'", arg);
}
@ -118,6 +184,6 @@ int main(int argc, char* argv[])
if ( !path )
path = ".";
if ( !types )
types = TYPE_FILE | TYPE_DIR;
return Find(AT_FDCWD, path, path, types) ? 0 : 1;
types = ALL_TYPES;
return find(AT_FDCWD, path, path, types) ? 0 : 1;
}