diff options
| -rw-r--r-- | src/install.c | 47 |
1 files changed, 46 insertions, 1 deletions
diff --git a/src/install.c b/src/install.c index 1e32ef4cd..08cc9265f 100644 --- a/src/install.c +++ b/src/install.c @@ -61,6 +61,7 @@ #include "system.h" #include "version.h" +#include "backupfile.h" #include "modechange.h" #include "makepath.h" #include "error.h" @@ -98,6 +99,7 @@ char *xmalloc (); int safe_read (); int full_write (); int isdir (); +enum backup_type get_version (); static int change_attributes __P ((char *path, int no_need_to_chown)); static int copy_file __P ((char *from, char *to, int *to_created)); @@ -147,6 +149,8 @@ static struct option const long_options[] = {"group", required_argument, NULL, 'g'}, {"mode", required_argument, NULL, 'm'}, {"owner", required_argument, NULL, 'o'}, + {"backup", no_argument, NULL, 'b'}, + {"version-control", required_argument, NULL, 'V'}, {"help", no_argument, &show_help, 1}, {"version", no_argument, &show_version, 1}, {NULL, 0, NULL, 0} @@ -158,6 +162,8 @@ main (int argc, char **argv) int optc; int errors = 0; char *symbolic_mode = NULL; + int make_backups = 0; + char *version; program_name = argv[0]; owner_name = NULL; @@ -167,13 +173,21 @@ main (int argc, char **argv) dir_arg = 0; umask (0); - while ((optc = getopt_long (argc, argv, "csdg:m:o:", long_options, + version = getenv ("SIMPLE_BACKUP_SUFFIX"); + if (version) + simple_backup_suffix = version; + version = getenv ("VERSION_CONTROL"); + + while ((optc = getopt_long (argc, argv, "bcsdg:m:o:V:S:", long_options, (int *) 0)) != EOF) { switch (optc) { case 0: break; + case 'b': + make_backups = 1; + break; case 'c': break; case 's': @@ -191,6 +205,9 @@ main (int argc, char **argv) case 'o': owner_name = optarg; break; + case 'V': + version = optarg; + break; default: usage (1); } @@ -210,6 +227,9 @@ main (int argc, char **argv) error (1, 0, _("the strip option may not be used when installing a directory")); + if (make_backups) + backup_type = get_version (version); + if (optind == argc || (optind == argc - 1 && !dir_arg)) { error (0, 0, _("too few arguments")); @@ -339,6 +359,28 @@ copy_file (char *from, char *to, int *to_created) error (0, 0, _("`%s' and `%s' are the same file"), from, to); return 1; } + + /* The destination file exists. Try to back it up if required. */ + if (backup_type != none) + { + char *tmp_backup = find_backup_file_name (to); + char *dst_backup; + + if (tmp_backup == NULL) + error (1, 0, "virtual memory exhausted"); + dst_backup = (char *) alloca (strlen (tmp_backup) + 1); + strcpy (dst_backup, tmp_backup); + free (tmp_backup); + if (rename (to, dst_backup)) + { + if (errno != ENOENT) + { + error (0, errno, "cannot backup `%s'", to); + return 1; + } + } + } + /* If unlink fails, try to proceed anyway. */ if (unlink (to)) target_created = 0; @@ -546,6 +588,9 @@ format, make all components of the given DIRECTORY(ies).\n\ -m, --mode=MODE set permission mode (as in chmod), instead of rw-r--r--\n\ -o, --owner=OWNER set ownership (super-user only)\n\ -s, --strip strip symbol tables, only for 1st and 2nd formats\n\ + -b, --backup make backup before removal\n\ + -S, --suffix=SUFFIX override the usual backup suffix\n\ + -V, --version-control=WORD override the usual version control\n\ --help display this help and exit\n\ --version output version information and exit\n")); } |