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epminstall.c
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/*
* Install program replacement for the ESP Package Manager (EPM).
*
* Copyright 2020 by Jim Jagielski
* Copyright 1999-2020 by Michael R Sweet
* Copyright 1999-2010 by Easy Software Products.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Include necessary headers...
*/
#include "epm.h"
/*
* Global variable used by dist functions...
*/
int Verbosity = 0;
/*
* Local functions...
*/
static file_t *find_file(dist_t *dist, const char *dst);
static void info(void);
static void usage(void)
#ifdef __GNUC__
__attribute__((__noreturn__))
#endif /* __GNUC__ */
;
/*
* 'main()' - Add or replace files, directories, and symlinks.
*/
int /* O - Exit status */
main(int argc, /* I - Number of command-line arguments */
char *argv[]) /* I - Command-line arguments */
{
int i; /* Looping var */
int mode, /* Permissions */
directories; /* Installing directories? */
char *user, /* Owner */
*group, /* Group */
*listname, /* List filename */
*src, /* Source filename */
dst[1024], /* Destination filename */
linkname[1024]; /* Symlink name */
ssize_t linklen; /* Length of symlink */
int num_files; /* Number of files to install */
char *files[1000]; /* Files to install */
struct stat fileinfo; /* File information */
dist_t *dist; /* Distribution */
file_t *file; /* File in distribution */
struct utsname platform; /* Platform information */
/*
* Parse the command-line arguments...
*/
num_files = 0;
mode = 0;
user = "root";
group = "sys";
directories = 0;
if ((listname = getenv("EPMLIST")) == NULL)
listname = "epm.list";
for (i = 1; i < argc; i++)
if (strcmp(argv[i], "-b") == 0)
continue;
else if (strcmp(argv[i], "-c") == 0)
continue;
else if (strcmp(argv[i], "-d") == 0)
directories = 1;
else if (strcmp(argv[i], "-g") == 0) {
i++;
if (i < argc)
group = argv[i];
else
usage();
} else if (strcmp(argv[i], "-m") == 0) {
i++;
if (i < argc)
mode = (int)strtol(argv[i], NULL, 8);
else
usage();
} else if (strcmp(argv[i], "-o") == 0) {
i++;
if (i < argc)
user = argv[i];
else
usage();
} else if (strcmp(argv[i], "-s") == 0)
continue;
else if (strcmp(argv[i], "--list-file") == 0) {
i++;
if (i < argc)
listname = argv[i];
else
usage();
} else if (argv[i][0] == '-')
usage();
else if (num_files < (sizeof(files) / sizeof(files[0]))) {
files[num_files] = argv[i];
num_files++;
} else {
fputs("epminstall: Too many filenames on command-line!\n", stderr);
usage();
}
if (num_files == 0 || (num_files < 2 && !directories))
usage();
get_platform(&platform);
if ((dist = read_dist(listname, &platform, "")) == NULL) {
fprintf(stderr, "epminstall: Unable to read list file \"%s\": %s\n", listname,
strerror(errno));
return (1);
}
/*
* Check to see if we are installing files or directories...
*/
if (directories) {
if (!mode)
mode = 0755;
for (i = 0; i < num_files; i++) {
/*
* Copy the directory name into a new file entry, which is cleared
* by add_file()...
*/
if ((file = find_file(dist, files[i])) == NULL)
file = add_file(dist, NULL);
file->type = 'd';
file->mode = mode & 07777;
strlcpy(file->user, user, sizeof(file->user));
strlcpy(file->group, group, sizeof(file->group));
strlcpy(file->dst, files[i], sizeof(file->dst));
strlcpy(file->src, "-", sizeof(file->src));
}
} else {
/*
* Check to see if we have 1 or more files and a directory or
* a source and destination file...
*/
if (num_files == 2) {
file = find_file(dist, files[1]);
if (file == NULL || file->type != 'd') {
if (!file)
file = add_file(dist, NULL);
if (stat(files[0], &fileinfo)) {
fprintf(stderr, "epminstall: Unable to stat \"%s\": %s\n", files[0],
strerror(errno));
fileinfo.st_mode = mode;
}
if (S_ISLNK(fileinfo.st_mode)) {
file->type = 'l';
if ((linklen = readlink(files[0], linkname, sizeof(linkname) - 1)) <
0) {
fprintf(stderr, "epminstall: Unable to read symlink \"%s\": %s\n",
files[0], strerror(errno));
files[0] = "BROKEN-LINK";
} else {
linkname[linklen] = '\0';
files[0] = linkname;
}
} else
file->type = 'f';
if (mode)
file->mode = mode & 07777;
else if (fileinfo.st_mode & 0111)
file->mode = 0755;
else
file->mode = 0644;
strlcpy(file->user, user, sizeof(file->user));
strlcpy(file->group, group, sizeof(file->group));
strlcpy(file->dst, files[1], sizeof(file->dst));
strlcpy(file->src, files[0], sizeof(file->src));
} else
num_files--;
}
if (num_files != 2) {
if (num_files > 1)
num_files--;
if ((file = find_file(dist, files[num_files])) == NULL) {
/*
* Add the installation directory to the file list...
*/
file = add_file(dist, NULL);
file->type = 'd';
file->mode = 0755;
strlcpy(file->user, user, sizeof(file->user));
strlcpy(file->group, group, sizeof(file->group));
strlcpy(file->dst, files[num_files], sizeof(file->dst));
strlcpy(file->src, "-", sizeof(file->src));
} else if (file->type != 'd') {
fprintf(stderr,
"epminstall: Destination path \"%s\" is not a directory!\n",
files[num_files]);
return (1);
}
for (i = 0; i < num_files; i++) {
/*
* Add/update the file in the distribution...
*/
if ((src = strrchr(files[i], '/')) != NULL)
src++;
else
src = files[i];
snprintf(dst, sizeof(dst), "%s/%s", files[num_files], src);
if ((file = find_file(dist, dst)) == NULL)
file = add_file(dist, NULL);
if (stat(files[i], &fileinfo)) {
fprintf(stderr, "epminstall: Unable to stat \"%s\": %s\n", files[i],
strerror(errno));
fileinfo.st_mode = mode;
}
if (S_ISLNK(fileinfo.st_mode)) {
file->type = 'l';
if ((linklen = readlink(files[i], linkname, sizeof(linkname) - 1)) <
0) {
fprintf(stderr, "epminstall: Unable to read symlink \"%s\": %s\n",
files[i], strerror(errno));
files[i] = "BROKEN-LINK";
} else {
linkname[linklen] = '\0';
files[i] = linkname;
}
} else
file->type = 'f';
if (mode)
file->mode = mode & 07777;
else if (fileinfo.st_mode & 0111)
file->mode = 0755;
else
file->mode = 0644;
strlcpy(file->user, user, sizeof(file->user));
strlcpy(file->group, group, sizeof(file->group));
strlcpy(file->dst, dst, sizeof(file->dst));
strlcpy(file->src, files[i], sizeof(file->src));
}
}
}
/*
* Sort the files to make the final list file easier to check...
*/
sort_dist_files(dist);
/*
* Write the distribution file...
*/
if (write_dist(listname, dist)) {
fprintf(stderr, "epminstall: Unable to read list file \"%s\": %s\n", listname,
strerror(errno));
return (1);
}
/*
* Return with no errors...
*/
return (0);
}
/*
* 'find_file()' - Find a file in the distribution...
*/
static file_t * /* O - File entry or NULL */
find_file(dist_t *dist, /* I - Distribution to search */
const char *dst) /* I - Destination filename */
{
int i; /* Looping var */
file_t *file; /* Current file */
for (i = dist->num_files, file = dist->files; i > 0; i--, file++)
if (strcmp(file->dst, dst) == 0)
return (file);
return (NULL);
}
/*
* 'info()' - Show the EPM copyright and license.
*/
static void info(void) {
puts(EPM_VERSION);
puts("Copyright 1999-2019 by Michael R Sweet.");
puts("Copyright 2020 by Jim Jagielski.");
puts("");
puts("EPM is free software and comes with ABSOLUTELY NO WARRANTY; for details");
puts("see the Apache License version 2.0 in the file LICENSE or at");
puts("\"https://www.apache.org/licenses/LICENSE-2.0\". Report all problems to");
puts("\"https://github.com/jimjag/epm/issues\".");
puts("");
}
/*
* 'usage()' - Show command-line usage instructions.
*/
static void usage(void) {
info();
puts("Usage: epminstall [options] file1 file2 ... fileN directory");
puts(" epminstall [options] file1 file2");
puts(" epminstall [options] -d directory1 directory2 ... directoryN");
puts("Options:");
puts("-g group");
puts(" Set group of installed file(s).");
puts("-m mode");
puts(" Set permissions of installed file(s).");
puts("-u owner");
puts(" Set owner of installed file(s).");
exit(1);
}