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switch to fork/exec/dup2 instead of popen

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To get rid of the problems from having to escape certain special chars
when using popen to call the find and du system commands, on suggestion
of N-R-K this switches popen with a fork/exec/dup2 based approach.
See https://github.com/jarun/advcpmv/pull/14#issuecomment-1035880454 and
https://github.com/jarun/advcpmv/pull/14#issuecomment-1035892465.
This commit is contained in:
Michael Wehr
2022-02-13 15:50:06 +01:00
parent fb08e1aba6
commit 2532fc3ca3
1 changed files with 98 additions and 79 deletions
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175
advcpmv-0.9-9.0.patch
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@@ -1,7 +1,7 @@
diff -aur coreutils-9.0/src/copy.c coreutils-9.0-patched/src/copy.c
--- coreutils-9.0/src/copy.c 2021-09-24 13:31:05.000000000 +0200
+++ coreutils-9.0-patched/src/copy.c 2022-01-11 23:26:31.735507217 +0100
@@ -129,6 +129,121 @@
+++ coreutils-9.0-patched/src/copy.c 2022-02-13 13:20:13.643469909 +0100
@@ -129,6 +129,133 @@
dev_t dev;
};
@@ -14,29 +14,41 @@ diff -aur coreutils-9.0/src/copy.c coreutils-9.0-patched/src/copy.c
+ struct stat src_open_sb;
+};
+
+char * escape_double_quotes ( char * _cUnescapedString )
+FILE * spawn( const char *cmd, char *const argv[] )
+{
+ char * _cEscapedString;
+ _cEscapedString = (char *) calloc( sizeof(char) * strlen(_cUnescapedString) * 2, sizeof(char) );
+ size_t ipos = 0;
+ size_t rpos = 0;
+ for(rpos = 0, ipos = 0; _cUnescapedString[rpos] != '\0'; rpos++, ipos++)
+ {
+ if(_cUnescapedString[rpos] == '"')
+ {
+ _cEscapedString[ipos] = '\\';
+ ipos++;
+ FILE *ret = NULL;
+ int pfd_read[2];
+ pid_t pid;
+
+ if (cmd == NULL || argv == NULL)
+ return ret;
+
+ if (pipe(pfd_read) < 0) {
+ error(0, errno, "pipe: %s", cmd);
+ return ret;
+ }
+ if(_cUnescapedString[rpos] == '`')
+ {
+ _cEscapedString[ipos] = '\\';
+ ipos++;
+
+ if ((pid = fork()) == 0) {
+ int err = dup2(pfd_read[1], 1) < 0;
+ close(pfd_read[0]);
+ close(pfd_read[1]);
+
+ if (err)
+ error(EXIT_FAILURE, errno, "dup2: %s", cmd);
+ execvp(cmd, argv);
+ error(EXIT_FAILURE, errno, "exec: %s", cmd);
+ }
+ _cEscapedString[ipos] = _cUnescapedString[rpos];
+
+ close(pfd_read[1]);
+
+ if (pid < 0) {
+ close(pfd_read[0]);
+ error(0, errno, "fork: %s", cmd);
+ return ret;
+ }
+ ipos++;
+ _cEscapedString[ipos] = '\0';
+ return _cEscapedString;
+
+ ret = fdopen(pfd_read[0], "r");
+ return ret;
+}
+
+void format_time ( char * _cDest, double seconds, bool showall )
@@ -123,7 +135,7 @@ diff -aur coreutils-9.0/src/copy.c coreutils-9.0-patched/src/copy.c
/* Initial size of the cp.dest_info hash table. */
#define DEST_INFO_INITIAL_CAPACITY 61
@@ -300,13 +415,28 @@
@@ -300,13 +427,28 @@
static bool
sparse_copy (int src_fd, int dest_fd, char *buf, size_t buf_size,
size_t hole_size, bool punch_holes, bool allow_reflink,
@@ -153,7 +165,7 @@ diff -aur coreutils-9.0/src/copy.c coreutils-9.0-patched/src/copy.c
/* If not looking for holes, use copy_file_range if functional,
but don't use if reflink disallowed as that may be implicit. */
if ((! hole_size) && allow_reflink && functional_copy_file_range ())
@@ -362,6 +492,103 @@
@@ -362,6 +504,103 @@
while (max_n_read)
{
@@ -257,7 +269,7 @@ diff -aur coreutils-9.0/src/copy.c coreutils-9.0-patched/src/copy.c
ssize_t n_read = read (src_fd, buf, MIN (max_n_read, buf_size));
if (n_read < 0)
{
@@ -446,6 +673,14 @@
@@ -446,6 +685,14 @@
certain files in /proc or /sys with linux kernels. */
}
@@ -272,7 +284,7 @@ diff -aur coreutils-9.0/src/copy.c coreutils-9.0-patched/src/copy.c
/* Ensure a trailing hole is created, so that subsequent
calls of sparse_copy() start at the correct offset. */
if (make_hole && ! create_hole (dest_fd, dst_name, punch_holes, psize))
@@ -517,8 +752,16 @@
@@ -517,8 +764,16 @@
lseek_copy (int src_fd, int dest_fd, char *buf, size_t buf_size,
size_t hole_size, off_t ext_start, off_t src_total_size,
enum Sparse_type sparse_mode,
@@ -290,7 +302,7 @@ diff -aur coreutils-9.0/src/copy.c coreutils-9.0-patched/src/copy.c
{
off_t last_ext_start = 0;
off_t last_ext_len = 0;
@@ -590,10 +833,26 @@
@@ -590,10 +845,26 @@
is conservative and may miss some holes. */
off_t n_read;
bool read_hole;
@@ -319,7 +331,7 @@ diff -aur coreutils-9.0/src/copy.c coreutils-9.0-patched/src/copy.c
return false;
dest_pos = ext_start + n_read;
@@ -1374,8 +1633,82 @@
@@ -1374,8 +1645,82 @@
buf_alloc = xmalloc (buf_size + buf_alignment);
buf = ptr_align (buf_alloc, buf_alignment);
@@ -402,7 +414,7 @@ diff -aur coreutils-9.0/src/copy.c coreutils-9.0-patched/src/copy.c
if (! (
#ifdef SEEK_HOLE
scantype == LSEEK_SCANTYPE
@@ -1383,15 +1716,30 @@
@@ -1383,15 +1728,30 @@
scan_inference.ext_start, src_open_sb.st_size,
make_holes ? x->sparse_mode : SPARSE_NEVER,
x->reflink_mode != REFLINK_NEVER,
@@ -435,7 +447,7 @@ diff -aur coreutils-9.0/src/copy.c coreutils-9.0-patched/src/copy.c
{
return_val = false;
goto close_src_and_dst_desc;
@@ -1402,6 +1750,14 @@
@@ -1402,6 +1762,14 @@
return_val = false;
goto close_src_and_dst_desc;
}
@@ -452,7 +464,7 @@ diff -aur coreutils-9.0/src/copy.c coreutils-9.0-patched/src/copy.c
if (x->preserve_timestamps)
diff -aur coreutils-9.0/src/copy.h coreutils-9.0-patched/src/copy.h
--- coreutils-9.0/src/copy.h 2021-09-24 13:31:05.000000000 +0200
+++ coreutils-9.0-patched/src/copy.h 2022-01-11 23:26:31.739507270 +0100
+++ coreutils-9.0-patched/src/copy.h 2022-02-13 13:20:13.643469909 +0100
@@ -236,6 +236,11 @@
Create destination directories as usual. */
bool symbolic_link;
@@ -470,7 +482,7 @@ diff -aur coreutils-9.0/src/copy.h coreutils-9.0-patched/src/copy.h
mode_t cached_umask (void);
+/* BEGIN progress mod */
+char * escape_double_quotes ( char * _cUnescapedString );
+FILE * spawn( const char *cmd, char *const argv[] );
+void format_time ( char * _cDst, double seconds, bool showall );
+
+int file_size_format ( char * _cDst, long _lSize, int _iCounter );
@@ -490,7 +502,7 @@ diff -aur coreutils-9.0/src/copy.h coreutils-9.0-patched/src/copy.h
#endif
diff -aur coreutils-9.0/src/cp.c coreutils-9.0-patched/src/cp.c
--- coreutils-9.0/src/cp.c 2021-09-24 13:31:05.000000000 +0200
+++ coreutils-9.0-patched/src/cp.c 2022-01-11 23:26:31.743507323 +0100
+++ coreutils-9.0-patched/src/cp.c 2022-02-13 13:20:13.647469904 +0100
@@ -131,6 +131,9 @@
{"symbolic-link", no_argument, NULL, 's'},
{"target-directory", required_argument, NULL, 't'},
@@ -515,7 +527,7 @@ diff -aur coreutils-9.0/src/cp.c coreutils-9.0-patched/src/cp.c
-i, --interactive prompt before overwrite (overrides a previous -n\
\n\
option)\n\
@@ -634,6 +644,83 @@
@@ -634,6 +644,84 @@
die (EXIT_FAILURE, 0, _("target %s is not a directory"),
quoteaf (file[n_files - 1]));
}
@@ -549,33 +561,34 @@ diff -aur coreutils-9.0/src/cp.c coreutils-9.0-patched/src/cp.c
+ int j;
+
+ /* how many files are we copying */
+ char command[1024];
+ char * _cEscapedString = escape_double_quotes( file[0] );
+ sprintf( command, "find \"%s\" -type f | wc -l", _cEscapedString );
+ free( _cEscapedString );
+ FILE *fp ;
+ char output[1024];
+ fp = popen(command,"r");
+ if ( fp == NULL || fgets(output, sizeof(output)-1, fp) == NULL)
+ char fcmd[] = "find";
+ fp = spawn(fcmd, (char *[]){ fcmd, file[0], NULL, "-type", "f", NULL });
+ if ( fp == NULL)
+ printf("failed to run find\r");
+ else
+ if ( atoi(output) > n_files )
+ g_iTotalFiles = atoi( output );
+ {
+ char *line_buf = NULL;
+ size_t line_buf_size = 0;
+ int line_count = 0;
+ ssize_t line_size;
+ line_size = getline(&line_buf, &line_buf_size, fp);
+ while (line_size > 0)
+ {
+ line_count++;
+ line_size = getline(&line_buf, &line_buf_size, fp);
+ }
+ free (line_buf);
+ if ( line_count > n_files )
+ g_iTotalFiles = line_count;
+ }
+
+ for (j = 0; j < iFiles; j++)
+ {
+ /* call du -s for each file */
+ /* create command */
+ char command[1024];
+ char * _cEscapedString = escape_double_quotes( file[j] );
+ sprintf ( command, "du -s \"%s\"", _cEscapedString );
+ free( _cEscapedString );
+
+ FILE *fp;
+ char output[1024];
+
+ /* run command */
+ fp = popen(command, "r");
+ char dcmd[] = "du";
+ fp = spawn(dcmd, (char *[]){ dcmd, "-s", file[j], NULL });
+ if (fp == NULL || fgets(output, sizeof(output)-1, fp) == NULL) {
+ printf("failed to run du\r" );
+ }
@@ -599,7 +612,7 @@ diff -aur coreutils-9.0/src/cp.c coreutils-9.0-patched/src/cp.c
if (target_directory)
{
@@ -781,6 +868,56 @@
@@ -781,6 +869,56 @@
ok = copy (source, new_dest, 0, x, &unused, NULL);
}
@@ -656,7 +669,7 @@ diff -aur coreutils-9.0/src/cp.c coreutils-9.0-patched/src/cp.c
return ok;
}
@@ -816,6 +953,11 @@
@@ -816,6 +954,11 @@
x->recursive = false;
x->sparse_mode = SPARSE_AUTO;
x->symbolic_link = false;
@@ -668,7 +681,7 @@ diff -aur coreutils-9.0/src/cp.c coreutils-9.0-patched/src/cp.c
x->set_mode = false;
x->mode = 0;
@@ -954,7 +1096,8 @@
@@ -954,7 +1097,8 @@
selinux_enabled = (0 < is_selinux_enabled ());
cp_option_init (&x);
@@ -678,7 +691,7 @@ diff -aur coreutils-9.0/src/cp.c coreutils-9.0-patched/src/cp.c
long_opts, NULL))
!= -1)
{
@@ -1011,6 +1154,12 @@
@@ -1011,6 +1155,12 @@
x.unlink_dest_after_failed_open = true;
break;
@@ -691,7 +704,7 @@ diff -aur coreutils-9.0/src/cp.c coreutils-9.0-patched/src/cp.c
case 'H':
x.dereference = DEREF_COMMAND_LINE_ARGUMENTS;
break;
@@ -1171,6 +1320,11 @@
@@ -1171,6 +1321,11 @@
usage (EXIT_FAILURE);
}
@@ -705,7 +718,7 @@ diff -aur coreutils-9.0/src/cp.c coreutils-9.0-patched/src/cp.c
version_control_string)
diff -aur coreutils-9.0/src/mv.c coreutils-9.0-patched/src/mv.c
--- coreutils-9.0/src/mv.c 2021-09-24 13:31:05.000000000 +0200
+++ coreutils-9.0-patched/src/mv.c 2022-01-11 23:26:31.743507323 +0100
+++ coreutils-9.0-patched/src/mv.c 2022-02-13 13:20:13.647469904 +0100
@@ -66,6 +66,9 @@
{"target-directory", required_argument, NULL, 't'},
{"update", no_argument, NULL, 'u'},
@@ -716,7 +729,7 @@ diff -aur coreutils-9.0/src/mv.c coreutils-9.0-patched/src/mv.c
{GETOPT_HELP_OPTION_DECL},
{GETOPT_VERSION_OPTION_DECL},
{NULL, 0, NULL, 0}
@@ -170,8 +173,124 @@
@@ -170,8 +173,130 @@
{
bool copy_into_self;
bool rename_succeeded;
@@ -743,30 +756,36 @@ diff -aur coreutils-9.0/src/mv.c coreutils-9.0-patched/src/mv.c
+ g_oStartTime = start_time;
+
+ /* how many files are we copying */
+ char command[1024];
+ char output[1024];
+ FILE *fp ;
+
+ char * _cEscapedString = escape_double_quotes( (unsigned char *)(size_t)source );
+ sprintf( command, "find \"%s\" -type f | wc -l", _cEscapedString );
+ free( _cEscapedString );
+ fp = popen(command,"r");
+ if ( fp == NULL || fgets(output, sizeof(output)-1, fp) == NULL)
+ char output[1024];
+ char fcmd[] = "find";
+ fp = spawn(fcmd, (char *[]){ fcmd, (unsigned char *)(size_t)source, NULL, "-type", "f", NULL });
+ if ( fp == NULL)
+ printf("failed to run find\r");
+ else
+ g_iTotalFiles = atoi( output );
+ {
+ char *line_buf = NULL;
+ size_t line_buf_size = 0;
+ int line_count = 0;
+ ssize_t line_size;
+ line_size = getline(&line_buf, &line_buf_size, fp);
+ while (line_size > 0)
+ {
+ line_count++;
+ line_size = getline(&line_buf, &line_buf_size, fp);
+ }
+ free (line_buf);
+ g_iTotalFiles = line_count;
+ }
+ /* close */
+ pclose(fp);
+
+ printf ("calculating total size... \r");
+ fflush (stdout);
+ long iTotalSize = 0;
+ /* call du -s for each file */
+ /* create command */
+ _cEscapedString = escape_double_quotes( (unsigned char *)(size_t)source );
+ sprintf ( command, "du -s \"%s\"", _cEscapedString );
+ free( _cEscapedString );
+
+ /* run command */
+ fp = popen(command, "r");
+ char dcmd[] = "du";
+ fp = spawn(dcmd, (char *[]){ dcmd, "-s", (unsigned char *)(size_t)source, NULL });
+ if (fp == NULL || fgets(output, sizeof(output)-1, fp) == NULL) {
+ printf("failed to run du\r" );
+ }
@@ -841,7 +860,7 @@ diff -aur coreutils-9.0/src/mv.c coreutils-9.0-patched/src/mv.c
if (ok)
{
char const *dir_to_remove;
@@ -306,6 +425,11 @@
@@ -306,6 +431,11 @@
\n\
-b like --backup but does not accept an argument\n\
-f, --force do not prompt before overwriting\n\
@@ -853,7 +872,7 @@ diff -aur coreutils-9.0/src/mv.c coreutils-9.0-patched/src/mv.c
-i, --interactive prompt before overwrite\n\
-n, --no-clobber do not overwrite an existing file\n\
If you specify more than one of -i, -f, -n, only the final one takes effect.\n\
@@ -361,7 +485,8 @@
@@ -361,7 +491,8 @@
/* Try to disable the ability to unlink a directory. */
priv_set_remove_linkdir ();
@@ -863,7 +882,7 @@ diff -aur coreutils-9.0/src/mv.c coreutils-9.0-patched/src/mv.c
!= -1)
{
switch (c)
@@ -407,6 +532,11 @@
@@ -407,6 +538,11 @@
case 'v':
x.verbose = true;
break;