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-rw-r--r--zutils.cc175
1 files changed, 43 insertions, 132 deletions
diff --git a/zutils.cc b/zutils.cc
index 8961376..afce7fc 100644
--- a/zutils.cc
+++ b/zutils.cc
@@ -27,14 +27,51 @@
#include <unistd.h>
#include <sys/wait.h>
-#include "zutils.h"
#include "rc.h"
+#include "zutils.h"
-const char * invocation_name = 0;
-const char * util_name = program_name;
+namespace {
-int verbosity = 0;
+// first magic byte must be different among formats
+enum { bzip2_magic_size = 3,
+ gzip_magic_size = 2,
+ lzip_magic_size = 4,
+ xz_magic_size = 5 };
+const uint8_t bzip2_magic[bzip2_magic_size] =
+ { 0x42, 0x5A, 0x68 }; // "BZh"
+const uint8_t gzip_magic[gzip_magic_size] =
+ { 0x1F, 0x8B };
+const uint8_t lzip_magic[lzip_magic_size] =
+ { 0x4C, 0x5A, 0x49, 0x50 }; // "LZIP"
+const uint8_t xz_magic[xz_magic_size] =
+ { 0xFD, 0x37, 0x7A, 0x58, 0x5A }; // 0xFD, "7zXZ"
+
+
+// Returns -1 if child not terminated, 2 in case of error, or
+// exit status of child process 'pid'.
+//
+int child_status( const pid_t pid, const char * const name )
+ {
+ int status;
+ while( true )
+ {
+ const int tmp = waitpid( pid, &status, WNOHANG );
+ if( tmp == -1 && errno != EINTR )
+ {
+ if( verbosity >= 0 )
+ std::fprintf( stderr, "%s: Error checking status of '%s': %s.\n",
+ program_name, name, std::strerror( errno ) );
+ _exit( 2 );
+ }
+ if( tmp == 0 ) return -1; // child not terminated
+ if( tmp == pid ) break; // child terminated
+ }
+ if( WIFEXITED( status ) ) return WEXITSTATUS( status );
+ return 2;
+ }
+
+} // end namespace
int parse_format_type( const std::string & arg )
@@ -152,7 +189,7 @@ bool set_data_feeder( int * const infdp, Children & children, int format_index )
!feed_data( old_infd, fda[1], magic_data, magic_size ) )
_exit( 2 );
if( close( fda[1] ) != 0 )
- { show_close_error( "data feeder" ); _exit( 2 ); }
+ { show_close_error(); _exit( 2 ); }
_exit( 0 );
}
if( pid < 0 ) // parent
@@ -201,7 +238,7 @@ bool set_data_feeder( int * const infdp, Children & children, int format_index )
!feed_data( old_infd, fda[1], magic_data, magic_size ) )
_exit( 2 );
if( close( fda[1] ) != 0 )
- { show_close_error( "data feeder" ); _exit( 2 ); }
+ { show_close_error(); _exit( 2 ); }
_exit( 0 );
}
if( pid < 0 ) // parent
@@ -214,84 +251,6 @@ bool set_data_feeder( int * const infdp, Children & children, int format_index )
}
-void show_help_addr()
- {
- std::printf( "\nReport bugs to zutils-bug@nongnu.org\n"
- "Zutils home page: http://www.nongnu.org/zutils/zutils.html\n" );
- }
-
-
-void show_version( const char * const Util_name )
- {
- if( !Util_name || !Util_name[0] )
- std::printf( "%s %s\n", Program_name, PROGVERSION );
- else
- std::printf( "%s (%s) %s\n", Util_name, program_name, PROGVERSION );
- std::printf( "Copyright (C) %s Antonio Diaz Diaz.\n", program_year );
- std::printf( "License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n"
- "This is free software: you are free to change and redistribute it.\n"
- "There is NO WARRANTY, to the extent permitted by law.\n" );
- }
-
-
-void show_error( const char * const msg, const int errcode, const bool help )
- {
- if( verbosity >= 0 )
- {
- if( msg && msg[0] )
- {
- std::fprintf( stderr, "%s: %s", util_name, msg );
- if( errcode > 0 )
- std::fprintf( stderr, ": %s", std::strerror( errcode ) );
- std::fprintf( stderr, "\n" );
- }
- if( help )
- std::fprintf( stderr, "Try '%s --help' for more information.\n",
- invocation_name );
- }
- }
-
-
-void show_error2( const char * const msg, const char * const name )
- {
- if( verbosity >= 0 )
- std::fprintf( stderr, "%s: %s '%s': %s.\n",
- util_name, msg, name, std::strerror( errno ) );
- }
-
-
-void show_close_error( const char * const prog_name )
- {
- if( verbosity >= 0 )
- std::fprintf( stderr, "%s: Can't close output of %s: %s.\n",
- util_name, prog_name, std::strerror( errno ) );
- }
-
-
-void show_exec_error( const char * const prog_name )
- {
- if( verbosity >= 0 )
- std::fprintf( stderr, "%s: Can't exec '%s': %s.\n",
- util_name, prog_name, std::strerror( errno ) );
- }
-
-
-void show_fork_error( const char * const prog_name )
- {
- if( verbosity >= 0 )
- std::fprintf( stderr, "%s: Can't fork '%s': %s.\n",
- util_name, prog_name, std::strerror( errno ) );
- }
-
-
-void internal_error( const char * const msg )
- {
- if( verbosity >= 0 )
- std::fprintf( stderr, "%s: internal error: %s.\n", util_name, msg );
- std::exit( 3 );
- }
-
-
int test_format( const int infd, const uint8_t ** const magic_datap,
int * const magic_sizep )
{
@@ -335,51 +294,3 @@ int test_format( const int infd, const uint8_t ** const magic_datap,
*magic_datap = buf; *magic_sizep = i;
return -1;
}
-
-
-int wait_for_child( const pid_t pid, const char * const name,
- const int eretval, const bool isgzxz )
- {
- int status;
- while( waitpid( pid, &status, 0 ) == -1 )
- {
- if( errno != EINTR )
- {
- if( verbosity >= 0 )
- std::fprintf( stderr, "%s: Error waiting termination of '%s': %s.\n",
- util_name, name, std::strerror( errno ) );
- _exit( eretval );
- }
- }
-
- if( WIFEXITED( status ) )
- {
- const int tmp = WEXITSTATUS( status );
- if( isgzxz && eretval == 1 && tmp == 1 ) return 2; // for ztest
- return tmp;
- }
- return eretval;
- }
-
-
-int child_status( const pid_t pid, const char * const name,
- const int eretval )
- {
- int status;
- while( true )
- {
- const int tmp = waitpid( pid, &status, WNOHANG );
- if( tmp == -1 && errno != EINTR )
- {
- if( verbosity >= 0 )
- std::fprintf( stderr, "%s: Error checking status of '%s': %s.\n",
- util_name, name, std::strerror( errno ) );
- _exit( eretval );
- }
- if( tmp == 0 ) return -1; // child not terminated
- if( tmp == pid ) break; // child terminated
- }
-
- if( WIFEXITED( status ) ) return WEXITSTATUS( status );
- return eretval;
- }
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 04:03:53 +0000