/* * C4 -- CVS like front end to the Perforce p4 SCM tool. * * Copyright (c) 1998 - 2000, Neil Russell. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Neil Russell. * 4. The name Neil Russell may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY NEIL RUSSELL ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL NEIL RUSSELL BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * Control file and client root. */ #include "defs.h" /**************************************************/ /* * Read the environment from a .c4 file. */ static void read_environment(char * name) { int fd; char * p1; char * p2; int x; char vars[4096]; if ((fd = open(name, O_RDONLY)) == -1) Error(1, "cannot open %s", name); /* * Read the file. The amount of stuff in this * file is limited to 4KB (sizeof vars) at the * moment. There is currently no need for more. */ x = read(fd, vars, sizeof vars - 1); if (x == -1) Error(1, "read error on %s", name); if (x == sizeof vars - 1) Error(0, "contents of file %s is too long (%d byte limit)", name, sizeof vars); vars[x] = '\0'; close(fd); for (p1 = vars; (p2 = strchr(p1, '\n')); ) { char * xp; *p2 = '\0'; if ((xp = strchr(p1, '=')) && xp > p1) { char * s; /* * Environment variable. */ s = (char *)Alloc(strlen(p1) + 1); strcpy(s, p1); putenv(s); } else if (p1[0] == ':') { /* * Ignore specification. */ IgnoreSpec((Ignore **)0, &p1[1]); } else { /* * Some other sort of variable; it may get * used at some time in the future. */ } p1 = p2 + 1; } } /**************************************************/ /* * Locate the root of the client tree and read the ".c4" file. The * contents are installed in the environment. If the ".c4" file is * not found, c4 will still operate with standard p4 commands but c4 * specific commands will fail. */ void FindRoot(void) { struct stat rt; char name[1024]; int i; /* * Search from the current directory back for a ".c4" file, * and if found, use its contents to set environment variables * such as P4CLIENT and P4PORT. */ if (stat("/", &rt) == -1) Error(1, "cannot stat /"); for (i = 0; ; i++) { struct stat st; int l; int x; if (i == 0) strcpy(name, "./"); else { name[0] = '\0'; for (x = 0; x < i; x++) strcat(name, "../"); } l = strlen(name); /* * Check to see if we have reached the root directory * yet. If so, we failed. */ name[l] = '\0'; strcat(name, "."); if (stat(name, &st) == -1) Error(1, "cannot stat %s", name); if (rt.st_ino == st.st_ino && rt.st_dev == st.st_dev) break; /* * Check for a ".c4" file. */ name[l] = '\0'; strcat(name, C4TAG); if (access(name, R_OK) == 0) { read_environment(name); break; } } /* * Find the name of the real "p4" command (in the environment * variable P4COMMAND). */ { extern char * getenv(); char * p; if ((p = getenv("P4COMMAND"))) CmdP4 = p; } }
# | Change | User | Description | Committed | |
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#1 | 1985 | Sean Nolan | my initial branch | ||
//guest/perforce_software/utils/c4/findroot.c | |||||
#3 | 276 | Neil Russell |
C4 - small bug fixed; updated to version 1.6 * We are now a little more intelligent about what happens if there is a merge conflict between the local client and the head of the tree, and also about trying to do a refresh and a sync on the same file. |
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#2 | 159 | Neil Russell |
C4 integrated into //public/perforce/utils/c4. This is version 1.4 of C4, ready for release. |
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#1 | 18 | Perforce maintenance | Add c4, a CVS-like frontend to p4 |